Mikel
[转载]Android开发教程 — 葵花宝典第六层 控件之 Dialog ListView GridView – Jason_CC – 博客园.
Hi 大家好!
今天和大家一起来学习三种控件，对话框、列表、网格视图。
这三种控件比较重要，使用率也比较频繁，相对来说也比前面所讲的控件复杂，希望大家多练习，熟练掌握它们。
照例，上笑话。
论坛楼主：帅有个屁用——到头来还不是被卒吃掉！
论坛回复：帅有士陪，有炮打，有马骑，有车坐，有相暗恋……帅怎么不好？！！
Dialog 对话框，它运行起来的效果是什么样呢？如下图
这种是最常用的对话框
当点击了上图的确定后，会弹此对话框，这种对话框属于自定义布局类型
当执行一些比较费时的操作时，用这种对话框是个不错的选择
当我们需要用户进行选择操作，又不能使用下来列表时，可以使用这种自定义布局的对话框
接下来我们就一起来看看这些通过代码是如何实现的？
<span class="kwd">package</span><span class="pln"> TSD</span><span class="pun">.</span><span class="typ">Jason</span><span class="pun">.</span><span class="typ">Example</span><span class="pun">;</span><span class="pln"></span><span class="kwd">import</span><span class="pln"> android</span><span class="pun">.</span><span class="pln">app</span><span class="pun">.</span><span class="typ">Activity</span><span class="pun">;</span><span class="pln"></span><span class="kwd">import</span><span class="pln"> android</span><span class="pun">.</span><span class="pln">app</span><span class="pun">.</span><span class="typ">AlertDialog</span><span class="pun">;</span><span class="pln"></span><span class="kwd">import</span><span class="pln"> android</span><span class="pun">.</span><span class="pln">app</span><span class="pun">.</span><span class="typ">ProgressDialog</span><span class="pun">;</span><span class="pln"></span><span class="kwd">import</span><span class="pln"> android</span><span class="pun">.</span><span class="pln">app</span><span class="pun">.</span><span class="typ">AlertDialog</span><span class="pun">.</span><span class="typ">Builder</span><span class="pun">;</span><span class="pln"></span><span class="kwd">import</span><span class="pln"> android</span><span class="pun">.</span><span class="pln">app</span><span class="pun">.</span><span class="typ">Dialog</span><span class="pun">;</span><span class="pln"></span><span class="kwd">import</span><span class="pln"> android</span><span class="pun">.</span><span class="pln">content</span><span class="pun">.</span><span class="typ">DialogInterface</span><span class="pun">;</span><span class="pln"></span><span class="kwd">import</span><span class="pln"> android</span><span class="pun">.</span><span class="pln">os</span><span class="pun">.</span><span class="typ">Bundle</span><span class="pun">;</span><span class="pln"></span><span class="kwd">import</span><span class="pln"> android</span><span class="pun">.</span><span class="pln">view</span><span class="pun">.</span><span class="typ">LayoutInflater</span><span class="pun">;</span><span class="pln"></span><span class="kwd">import</span><span class="pln"> android</span><span class="pun">.</span><span class="pln">view</span><span class="pun">.</span><span class="typ">View</span><span class="pun">;</span><span class="pln"></span><span class="kwd">import</span><span class="pln"> android</span><span class="pun">.</span><span class="pln">widget</span><span class="pun">.</span><span class="typ">Button</span><span class="pun">;</span><span class="pln"></span><span class="com">/*** 对话框* @author Administrator* 常用方法：* setTitle()：给对话框设置title.setIcon():给对话框设置图标。setMessage():设置对话框的提示信息setItems()：设置对话框要显示的一个list,一般用于要显示几个命令时setSingleChoiceItems():设置对话框显示一个单选的ListsetMultiChoiceItems():用来设置对话框显示一系列的复选框。setPositiveButton():给对话框添加”Yes”按钮。setNegativeButton():给对话框添加”No”按钮。**/</span><span class="pln"></span><span class="kwd">public</span><span class="pln"> </span><span class="kwd">class</span><span class="pln"> </span><span class="typ">DialogActivity</span><span class="pln"> </span><span class="kwd">extends</span><span class="pln"> </span><span class="typ">Activity</span><span class="pln"> </span><span class="pun">{</span><span class="pln"></span><span class="typ">Button</span><span class="pln"> btn1</span><span class="pun">;</span><span class="pln"></span><span class="typ">ProgressDialog</span><span class="pln"> p</span><span class="pun">;</span><span class="pln"></span><span class="lit">@Override</span><span class="pln"></span><span class="kwd">protected</span><span class="pln"> </span><span class="kwd">void</span><span class="pln"> onCreate</span><span class="pun">(</span><span class="typ">Bundle</span><span class="pln"> savedInstanceState</span><span class="pun">)</span><span class="pln"> </span><span class="pun">{</span><span class="pln"></span><span class="kwd">super</span><span class="pun">.</span><span class="pln">onCreate</span><span class="pun">(</span><span class="pln">savedInstanceState</span><span class="pun">);</span><span class="pln">setContentView</span><span class="pun">(</span><span class="pln">R</span><span class="pun">.</span><span class="pln">layout</span><span class="pun">.</span><span class="pln">diaolg</span><span class="pun">);</span><span class="pln">btn1 </span><span class="pun">=</span><span class="pln"> </span><span class="pun">(</span><span class="typ">Button</span><span class="pun">)</span><span class="pln">findViewById</span><span class="pun">(</span><span class="pln">R</span><span class="pun">.</span><span class="pln">id</span><span class="pun">.</span><span class="pln">btnDialog</span><span class="pun">);</span><span class="pln">btn1</span><span class="pun">.</span><span class="pln">setOnClickListener</span><span class="pun">(</span><span class="kwd">new</span><span class="pln"> </span><span class="typ">Button</span><span class="pun">.</span><span class="typ">OnClickListener</span><span class="pun">()</span><span class="pln"> </span><span class="pun">{</span><span class="pln"></span><span class="lit">@Override</span><span class="pln"></span><span class="kwd">public</span><span class="pln"> </span><span class="kwd">void</span><span class="pln"> onClick</span><span class="pun">(</span><span class="typ">View</span><span class="pln"> v</span><span class="pun">)</span><span class="pln"> </span><span class="pun">{</span><span class="pln"></span><span class="typ">Builder</span><span class="pln"> dialog </span><span class="pun">=</span><span class="pln"> </span><span class="kwd">new</span><span class="pln"> </span><span class="typ">AlertDialog</span><span class="pun">.</span><span class="typ">Builder</span><span class="pun">(</span><span class="typ">DialogActivity</span><span class="pun">.</span><span class="kwd">this</span><span class="pun">);</span><span class="pln">dialog</span><span class="pun">.</span><span class="pln">setTitle</span><span class="pun">(</span><span class="str">"登录提示"</span><span class="pun">);</span><span class="pln">dialog</span><span class="pun">.</span><span class="pln">setIcon</span><span class="pun">(</span><span class="pln">android</span><span class="pun">.</span><span class="pln">R</span><span class="pun">.</span><span class="pln">drawable</span><span class="pun">.</span><span class="pln">ic_dialog_info</span><span class="pun">);</span><span class="pln">dialog</span><span class="pun">.</span><span class="pln">setMessage</span><span class="pun">(</span><span class="str">"是否登录？"</span><span class="pun">);</span><span class="pln">dialog</span><span class="pun">.</span><span class="pln">setPositiveButton</span><span class="pun">(</span><span class="str">"确定"</span><span class="pun">,</span><span class="pln"> </span><span class="kwd">new</span><span class="pln"> </span><span class="typ">DialogInterface</span><span class="pun">.</span><span class="typ">OnClickListener</span><span class="pun">()</span><span class="pln"> </span><span class="pun">{</span><span class="pln"></span><span class="lit">@Override</span><span class="pln"></span><span class="kwd">public</span><span class="pln"> </span><span class="kwd">void</span><span class="pln"> onClick</span><span class="pun">(</span><span class="typ">DialogInterface</span><span class="pln"> dialog</span><span class="pun">,</span><span class="pln"> </span><span class="kwd">int</span><span class="pln"> which</span><span class="pun">)</span><span class="pln"> </span><span class="pun">{</span><span class="pln"></span><span class="typ">ShowLoginDialog</span><span class="pun">();</span><span class="pln"></span><span class="pun">}</span><span class="pln"></span><span class="pun">});</span><span class="pln">dialog</span><span class="pun">.</span><span class="pln">setNegativeButton</span><span class="pun">(</span><span class="str">"取消"</span><span class="pun">,</span><span class="pln"> </span><span class="kwd">new</span><span class="pln"> </span><span class="typ">DialogInterface</span><span class="pun">.</span><span class="typ">OnClickListener</span><span class="pun">()</span><span class="pln"> </span><span class="pun">{</span><span class="pln"></span><span class="lit">@Override</span><span class="pln"></span><span class="kwd">public</span><span class="pln"> </span><span class="kwd">void</span><span class="pln"> onClick</span><span class="pun">(</span><span class="typ">DialogInterface</span><span class="pln"> dialog</span><span class="pun">,</span><span class="pln"> </span><span class="kwd">int</span><span class="pln"> which</span><span class="pun">)</span><span class="pln"> </span><span class="pun">{</span><span class="pln"></span><span class="typ">DialogActivity</span><span class="pun">.</span><span class="kwd">this</span><span class="pun">.</span><span class="pln">finish</span><span class="pun">();</span><span class="pln"></span><span class="pun">}</span><span class="pln"></span><span class="pun">});</span><span class="pln">dialog</span><span class="pun">.</span><span class="pln">show</span><span class="pun">();</span><span class="pln"></span><span class="pun">}</span><span class="pln"></span><span class="pun">});</span><span class="pln"></span><span class="pun">}</span><span class="pln"></span><span class="pun">}</span><span class="pln"></span> |
以上代码是我们第一张对话框的效果实现代码，大家发现是不是挺简单，当我们单击确定按钮后，将调用一个叫做ShowLoginDialog的方法。
这个方法马上会贴出来，在这里我还是要强调下，大家在写代码的时候一定要有一个良好的编程思想，将功能拆分，降低代码的耦合度，一个方法只做一件事情，不要一股脑的将代码写到一个方法里。希望大家记得。
<span class="kwd">private</span><span class="pln"> </span><span class="kwd">void</span><span class="pln"> </span><span class="typ">ShowLoginDialog</span><span class="pun">()</span><span class="pln"></span><span class="pun">{</span><span class="pln"></span><span class="typ">Builder</span><span class="pln"> builder </span><span class="pun">=</span><span class="pln"> </span><span class="kwd">new</span><span class="pln"> </span><span class="typ">AlertDialog</span><span class="pun">.</span><span class="typ">Builder</span><span class="pun">(</span><span class="typ">DialogActivity</span><span class="pun">.</span><span class="kwd">this</span><span class="pun">);</span><span class="pln">builder</span><span class="pun">.</span><span class="pln">setTitle</span><span class="pun">(</span><span class="str">"用户登录"</span><span class="pun">);</span><span class="pln"></span><span class="typ">LayoutInflater</span><span class="pln"> factory </span><span class="pun">=</span><span class="pln"> </span><span class="typ">LayoutInflater</span><span class="pun">.</span><span class="kwd">from</span><span class="pun">(</span><span class="typ">DialogActivity</span><span class="pun">.</span><span class="kwd">this</span><span class="pun">);</span><span class="pln"></span><span class="typ">View</span><span class="pln"> dialogView </span><span class="pun">=</span><span class="pln"> factory</span><span class="pun">.</span><span class="pln">inflate</span><span class="pun">(</span><span class="pln">R</span><span class="pun">.</span><span class="pln">layout</span><span class="pun">.</span><span class="pln">dialogview</span><span class="pun">,</span><span class="pln"> </span><span class="kwd">null</span><span class="pun">);</span><span class="pln">builder</span><span class="pun">.</span><span class="pln">setView</span><span class="pun">(</span><span class="pln">dialogView</span><span class="pun">);</span><span class="pln">builder</span><span class="pun">.</span><span class="pln">setPositiveButton</span><span class="pun">(</span><span class="str">"确定"</span><span class="pun">,</span><span class="pln"> </span><span class="kwd">new</span><span class="pln"> </span><span class="typ">DialogInterface</span><span class="pun">.</span><span class="typ">OnClickListener</span><span class="pun">()</span><span class="pln"> </span><span class="pun">{</span><span class="pln"></span><span class="lit">@Override</span><span class="pln"></span><span class="kwd">public</span><span class="pln"> </span><span class="kwd">void</span><span class="pln"> onClick</span><span class="pun">(</span><span class="typ">DialogInterface</span><span class="pln"> dialog</span><span class="pun">,</span><span class="pln"> </span><span class="kwd">int</span><span class="pln"> which</span><span class="pun">)</span><span class="pln"> </span><span class="pun">{</span><span class="pln"></span><span class="typ">DialogWait</span><span class="pun">();</span><span class="pln"></span><span class="pun">}</span><span class="pln"></span><span class="pun">});</span><span class="pln">builder</span><span class="pun">.</span><span class="pln">setNegativeButton</span><span class="pun">(</span><span class="str">"取消"</span><span class="pun">,</span><span class="pln"> </span><span class="kwd">new</span><span class="pln"> </span><span class="typ">DialogInterface</span><span class="pun">.</span><span class="typ">OnClickListener</span><span class="pun">()</span><span class="pln"> </span><span class="pun">{</span><span class="pln"></span><span class="lit">@Override</span><span class="pln"></span><span class="kwd">public</span><span class="pln"> </span><span class="kwd">void</span><span class="pln"> onClick</span><span class="pun">(</span><span class="typ">DialogInterface</span><span class="pln"> dialog</span><span class="pun">,</span><span class="pln"> </span><span class="kwd">int</span><span class="pln"> which</span><span class="pun">)</span><span class="pln"> </span><span class="pun">{</span><span class="pln"></span><span class="typ">DialogActivity</span><span class="pun">.</span><span class="kwd">this</span><span class="pun">.</span><span class="pln">finish</span><span class="pun">();</span><span class="pln"></span><span class="pun">}</span><span class="pln"></span><span class="pun">});</span><span class="pln">builder</span><span class="pun">.</span><span class="pln">show</span><span class="pun">();</span><span class="pln"></span><span class="pun">}</span><span class="pln"></span> |
上边被标注的代码是为了让Dialog中的内容部分显示我们自定义的布局文件，通过builder对象的setView方法就可以将R.layout.dialogview这个布局文件绑定到对话框中。
布局文件代码如下
<span class="com"><!--?xml version="1.0" encoding="utf-8"?--></span><span class="pln"></span> |
第三个等待效果的对话框是如何实现的呢？上边我们调用了一个方法叫做 DialogWait
<span class="kwd">private</span><span class="pln"> </span><span class="kwd">void</span><span class="pln"> </span><span class="typ">DialogWait</span><span class="pun">()</span><span class="pln"></span><span class="pun">{</span><span class="pln">p </span><span class="pun">=</span><span class="pln"> </span><span class="typ">ProgressDialog</span><span class="pun">.</span><span class="pln">show</span><span class="pun">(</span><span class="typ">DialogActivity</span><span class="pun">.</span><span class="kwd">this</span><span class="pun">,</span><span class="pln"> </span><span class="str">"正在登录"</span><span class="pun">,</span><span class="pln"> </span><span class="str">"请稍后..."</span><span class="pun">,</span><span class="pln"> </span><span class="kwd">true</span><span class="pun">);</span><span class="pln"></span><span class="kwd">new</span><span class="pln"> </span><span class="typ">Thread</span><span class="pun">(){</span><span class="pln"></span><span class="kwd">public</span><span class="pln"> </span><span class="kwd">void</span><span class="pln"> run</span><span class="pun">(){</span><span class="pln"></span><span class="kwd">try</span><span class="pln"> </span><span class="pun">{</span><span class="pln"></span><span class="typ">Thread</span><span class="pun">.</span><span class="pln">sleep</span><span class="pun">(</span><span class="lit">2000</span><span class="pun">);</span><span class="pln"></span><span class="pun">}</span><span class="pln"> </span><span class="kwd">catch</span><span class="pln"> </span><span class="pun">(</span><span class="typ">InterruptedException</span><span class="pln"> e</span><span class="pun">)</span><span class="pln"> </span><span class="pun">{</span><span class="pln"></span><span class="com">// TODO Auto-generated catch block</span><span class="pln">e</span><span class="pun">.</span><span class="pln">printStackTrace</span><span class="pun">();</span><span class="pln"></span><span class="pun">}</span><span class="pln"></span><span class="kwd">finally</span><span class="pun">{</span><span class="pln">p</span><span class="pun">.</span><span class="pln">dismiss</span><span class="pun">();</span><span class="com">//登录结束后，取消对话框</span><span class="pln"></span><span class="pun">}</span><span class="pln"></span><span class="pun">}</span><span class="pln"></span><span class="pun">}.</span><span class="pln">start</span><span class="pun">();</span><span class="pln"></span><span class="pun">}</span> |
大家注意，此时的类就不在是AlertDialog，而是ProgressDialog。
上边代码我们为了测试看效果，所以开启了一个线程，并挂起2秒，这在以后项目中是不需要的，如果大家看不太懂，那么这里先跳过。
接下来我们来看看如何在对话框中嵌套一个ListView。
首先，需要一个布局文件，布局文件里只创建一个ListView，如下代码
<span class="com"><!--?xml version="1.0" encoding="utf-8"?--></span><span class="pln"></span> |
Java代码如下
<span class="kwd">private</span><span class="pln"> </span><span class="kwd">void</span><span class="pln"> </span><span class="typ">ShowLoginDialog</span><span class="pun">()</span><span class="pln"></span><span class="pun">{</span><span class="pln"></span><span class="typ">Builder</span><span class="pln"> builder </span><span class="pun">=</span><span class="pln"> </span><span class="kwd">new</span><span class="pln"> </span><span class="typ">AlertDialog</span><span class="pun">.</span><span class="typ">Builder</span><span class="pun">(</span><span class="typ">Tab1Activity</span><span class="pun">.</span><span class="kwd">this</span><span class="pun">);</span><span class="pln">builder</span><span class="pun">.</span><span class="pln">setTitle</span><span class="pun">(</span><span class="str">"选择城市"</span><span class="pun">);</span><span class="pln"></span><span class="typ">LayoutInflater</span><span class="pln"> factory </span><span class="pun">=</span><span class="pln"> </span><span class="typ">LayoutInflater</span><span class="pun">.</span><span class="kwd">from</span><span class="pun">(</span><span class="typ">Tab1Activity</span><span class="pun">.</span><span class="kwd">this</span><span class="pun">);</span><span class="pln"></span><span class="typ">View</span><span class="pln"> dialogView </span><span class="pun">=</span><span class="pln"> factory</span><span class="pun">.</span><span class="pln">inflate</span><span class="pun">(</span><span class="pln">R</span><span class="pun">.</span><span class="pln">layout</span><span class="pun">.</span><span class="pln">dialogcity</span><span class="pun">,</span><span class="pln"> </span><span class="kwd">null</span><span class="pun">);</span><span class="pln">listCity </span><span class="pun">=(</span><span class="typ">ListView</span><span class="pun">)</span><span class="pln">dialogView</span><span class="pun">.</span><span class="pln">findViewById</span><span class="pun">(</span><span class="pln">R</span><span class="pun">.</span><span class="pln">id</span><span class="pun">.</span><span class="pln">listCity</span><span class="pun">);</span><span class="pln"></span><span class="typ">GetCity</span><span class="pun">();</span><span class="pln">builder</span><span class="pun">.</span><span class="pln">setView</span><span class="pun">(</span><span class="pln">dialogView</span><span class="pun">);</span><span class="pln">builder</span><span class="pun">.</span><span class="pln">show</span><span class="pun">();</span><span class="pln"></span><span class="pun">}</span><span class="pln"></span><span class="kwd">private</span><span class="pln"> </span><span class="kwd">void</span><span class="pln"> </span><span class="typ">GetCity</span><span class="pun">()</span><span class="pln"></span><span class="pun">{</span><span class="pln"></span><span class="typ">System</span><span class="pun">.</span><span class="kwd">out</span><span class="pun">.</span><span class="pln">println</span><span class="pun">(</span><span class="str">"asd"</span><span class="pun">);</span><span class="pln"></span><span class="typ">ArrayList</span><span class="pun">&</span><span class="pln">gt</span><span class="pun">;</span><span class="pln"> listData </span><span class="pun">=</span><span class="pln"> </span><span class="kwd">new</span><span class="pln"> </span><span class="typ">ArrayList</span><span class="pun">&</span><span class="pln">gt</span><span class="pun">;();</span><span class="pln"></span><span class="typ">HashMap</span><span class="pln"> hmItem </span><span class="pun">=</span><span class="pln"> </span><span class="kwd">new</span><span class="pln"> </span><span class="typ">HashMap</span><span class="pun">();</span><span class="pln">hmItem</span><span class="pun">.</span><span class="pln">put</span><span class="pun">(</span><span class="str">"city"</span><span class="pun">,</span><span class="pln"> </span><span class="str">"北京"</span><span class="pun">);</span><span class="pln">listData</span><span class="pun">.</span><span class="pln">add</span><span class="pun">(</span><span class="pln">hmItem</span><span class="pun">);</span><span class="pln">hmItem </span><span class="pun">=</span><span class="pln"> </span><span class="kwd">new</span><span class="pln"> </span><span class="typ">HashMap</span><span class="pun">();</span><span class="pln">hmItem</span><span class="pun">.</span><span class="pln">put</span><span class="pun">(</span><span class="str">"city"</span><span class="pun">,</span><span class="pln"> </span><span class="str">"上海"</span><span class="pun">);</span><span class="pln">listData</span><span class="pun">.</span><span class="pln">add</span><span class="pun">(</span><span class="pln">hmItem</span><span class="pun">);</span><span class="pln">hmItem </span><span class="pun">=</span><span class="pln"> </span><span class="kwd">new</span><span class="pln"> </span><span class="typ">HashMap</span><span class="pun">();</span><span class="pln">hmItem</span><span class="pun">.</span><span class="pln">put</span><span class="pun">(</span><span class="str">"city"</span><span class="pun">,</span><span class="pln"> </span><span class="str">"深圳"</span><span class="pun">);</span><span class="pln">listData</span><span class="pun">.</span><span class="pln">add</span><span class="pun">(</span><span class="pln">hmItem</span><span class="pun">);</span><span class="pln">hmItem </span><span class="pun">=</span><span class="pln"> </span><span class="kwd">new</span><span class="pln"> </span><span class="typ">HashMap</span><span class="pun">();</span><span class="pln">hmItem</span><span class="pun">.</span><span class="pln">put</span><span class="pun">(</span><span class="str">"city"</span><span class="pun">,</span><span class="pln"> </span><span class="str">"天津"</span><span class="pun">);</span><span class="pln">listData</span><span class="pun">.</span><span class="pln">add</span><span class="pun">(</span><span class="pln">hmItem</span><span class="pun">);</span><span class="pln">hmItem </span><span class="pun">=</span><span class="pln"> </span><span class="kwd">new</span><span class="pln"> </span><span class="typ">HashMap</span><span class="pun">();</span><span class="pln">hmItem</span><span class="pun">.</span><span class="pln">put</span><span class="pun">(</span><span class="str">"city"</span><span class="pun">,</span><span class="pln"> </span><span class="str">"南京"</span><span class="pun">);</span><span class="pln">listData</span><span class="pun">.</span><span class="pln">add</span><span class="pun">(</span><span class="pln">hmItem</span><span class="pun">);</span><span class="pln">hmItem </span><span class="pun">=</span><span class="pln"> </span><span class="kwd">new</span><span class="pln"> </span><span class="typ">HashMap</span><span class="pun">();</span><span class="pln">hmItem</span><span class="pun">.</span><span class="pln">put</span><span class="pun">(</span><span class="str">"city"</span><span class="pun">,</span><span class="pln"> </span><span class="str">"武汉"</span><span class="pun">);</span><span class="pln">listData</span><span class="pun">.</span><span class="pln">add</span><span class="pun">(</span><span class="pln">hmItem</span><span class="pun">);</span><span class="pln">hmItem </span><span class="pun">=</span><span class="pln"> </span><span class="kwd">new</span><span class="pln"> </span><span class="typ">HashMap</span><span class="pun">();</span><span class="pln">hmItem</span><span class="pun">.</span><span class="pln">put</span><span class="pun">(</span><span class="str">"city"</span><span class="pun">,</span><span class="pln"> </span><span class="str">"江苏"</span><span class="pun">);</span><span class="pln">listData</span><span class="pun">.</span><span class="pln">add</span><span class="pun">(</span><span class="pln">hmItem</span><span class="pun">);</span><span class="pln">hmItem </span><span class="pun">=</span><span class="pln"> </span><span class="kwd">new</span><span class="pln"> </span><span class="typ">HashMap</span><span class="pun">();</span><span class="pln">hmItem</span><span class="pun">.</span><span class="pln">put</span><span class="pun">(</span><span class="str">"city"</span><span class="pun">,</span><span class="pln"> </span><span class="str">"宁波"</span><span class="pun">);</span><span class="pln">listData</span><span class="pun">.</span><span class="pln">add</span><span class="pun">(</span><span class="pln">hmItem</span><span class="pun">);</span><span class="pln"></span><span class="typ">SimpleAdapter</span><span class="pln"> sim </span><span class="pun">=</span><span class="pln"> </span><span class="kwd">new</span><span class="pln"> </span><span class="typ">SimpleAdapter</span><span class="pun">(</span><span class="kwd">this</span><span class="pun">,</span><span class="pln"> listData</span><span class="pun">,</span><span class="pln"> android</span><span class="pun">.</span><span class="pln">R</span><span class="pun">.</span><span class="pln">layout</span><span class="pun">.</span><span class="pln">simple_list_item_1</span><span class="pun">,</span><span class="pln"> </span><span class="kwd">new</span><span class="pln"> </span><span class="typ">String</span><span class="pun">[]{</span><span class="str">"city"</span><span class="pun">},</span><span class="pln"> </span><span class="kwd">new</span><span class="pln"> </span><span class="kwd">int</span><span class="pun">[]{</span><span class="pln">android</span><span class="pun">.</span><span class="pln">R</span><span class="pun">.</span><span class="pln">id</span><span class="pun">.</span><span class="pln">text1</span><span class="pun">});</span><span class="pln">listCity</span><span class="pun">.</span><span class="pln">setAdapter</span><span class="pun">(</span><span class="pln">sim</span><span class="pun">);</span><span class="pln"></span><span class="pun">}</span><span class="pln"></span> |
直接调用ShowLoginDialog方法即可。注意标注的代码，需要先获取ListView。这里已经用到了ListView，如果不太懂下边就将ListView，大家注意看。
ListView
上边已经展示过它运行的效果了，这里就不展示运行效果了。
那么要使用ListView需要哪些步骤呢？举一个例子，可能不太恰当
冰箱里没有鸡蛋了，我们从家里提了一个篮子去超市买鸡蛋。就是这样的一个过程。我们来分解下这个步骤
冰箱 == 展示数据 == ListView
超市里的鸡蛋 == 数据 == ArrayList 泛型集合
篮子 == 适配器 == SimpleAdapter
我们应该将 鸡蛋（ArrayList） 装到 篮子里（SimpleAdapter） 然后提回家 放到 冰箱里（ ListView）
分解完步骤后，那么我们看看如何用代码实现这个过程。
ListView userList; //声明一个ListView对象（冰箱）
userList = (ListView)findViewById(R.id.listUserInfo); //获取布局文件中的ListView控件赋值给ListView对象
ArrayList> listData = new ArrayList>(); //数据源 （超市装鸡蛋的盒子）
HashMap hmItem = new HashMap(); //需要一个HashMap键值对 （每一个鸡蛋）
hmItem.put(“userName”, “张三”);
hmItem.put(“userPhone”, “1234567890”);
listData.add(hmItem); //将鸡蛋装到数据源中
String[] s = new String[2]; //列 和键值对中的键 一一对应 每个键值对应该是一样的列数
s[0] = “userName”;
s[1] = “userPhone”;
int[] i = new int[2]; //用什么控件来装载上边String集合中的列 和上边的String数组也是一一对应的
i[0] = Android.R.id.text1;
i[1] = Android.R.id.text2;
SimpleAdapter sim = new SimpleAdapter(this, listData, android.R.layout.simple_list_item_1, s, i); //这就是我们的篮子
userList.setAdapter(sim); //将篮子中的鸡蛋装到冰箱中 🙂
完整的代码如下
<span class="kwd">package</span><span class="pln"> TSD</span><span class="pun">.</span><span class="typ">Jason</span><span class="pun">.</span><span class="typ">Example</span><span class="pun">;</span><span class="pln"></span><span class="kwd">import</span><span class="pln"> java</span><span class="pun">.</span><span class="pln">util</span><span class="pun">.</span><span class="typ">ArrayList</span><span class="pun">;</span><span class="pln"></span><span class="kwd">import</span><span class="pln"> java</span><span class="pun">.</span><span class="pln">util</span><span class="pun">.</span><span class="typ">HashMap</span><span class="pun">;</span><span class="pln"></span><span class="kwd">import</span><span class="pln"> java</span><span class="pun">.</span><span class="pln">util</span><span class="pun">.</span><span class="typ">List</span><span class="pun">;</span><span class="pln"></span><span class="kwd">import</span><span class="pln"> android</span><span class="pun">.</span><span class="pln">app</span><span class="pun">.</span><span class="typ">Activity</span><span class="pun">;</span><span class="pln"></span><span class="kwd">import</span><span class="pln"> android</span><span class="pun">.</span><span class="pln">os</span><span class="pun">.</span><span class="typ">Bundle</span><span class="pun">;</span><span class="pln"></span><span class="kwd">import</span><span class="pln"> android</span><span class="pun">.</span><span class="pln">view</span><span class="pun">.</span><span class="typ">View</span><span class="pun">;</span><span class="pln"></span><span class="kwd">import</span><span class="pln"> android</span><span class="pun">.</span><span class="pln">widget</span><span class="pun">.</span><span class="typ">AdapterView</span><span class="pun">;</span><span class="pln"></span><span class="kwd">import</span><span class="pln"> android</span><span class="pun">.</span><span class="pln">widget</span><span class="pun">.</span><span class="typ">ListView</span><span class="pun">;</span><span class="pln"></span><span class="kwd">import</span><span class="pln"> android</span><span class="pun">.</span><span class="pln">widget</span><span class="pun">.</span><span class="typ">SimpleAdapter</span><span class="pun">;</span><span class="pln"></span><span class="com">/*** ListView基本使用方法** 使用ListView的基本步骤* 1.准备ListView要显示的数据 ；* ArrayList> listData = new ArrayList>();** 2.使用 一维或多维 动态数组 保存数据；* HashMap hmItem = new HashMap();hmItem.put("userName", "张三");hmItem.put("userPhone", "1234567890");* 3.构建适配器 ， 简单地来说， 适配器就是 Item数组 ， 动态数组 有多少元素就生成多少个Item；* SimpleAdapter simpleAdapter；* 数据绑定的类* 参数解释** 第一个context，很明显大家根据英文可以知道是上下文的意思，它官方的意思是：SimpleAdapter所要运行关联到的视图，这个是什么呢？就是你这个SimpleAdapter所在的Activity（一般而言），所以这个参数一般是this第二个是一个泛型只要是一个List就行，这一般会想到是ArrayList，而他内部存储的则是Map或者继承自Map的对象，比如HashMap，这些语法都是Java的基本语法，不再详述了！这里呢是作为数据源，而且每一个ArraList中的一行就代表着呈现出来的一行，Map的键就是这一行的列名，值也是有列名的。第三个资源文件，就是说要加载这个两列所需要的视图资源文件，你可以左边一个TextView右边一个TextView，目的在于呈现左右两列的值！第四个参数是一个数组，主要是将Map对象中的名称映射到列名，一一对应第五个是将第四个参数的值一一对象的显示（一一对应）在接下来的int形的id数组中，这个id数组就是LayOut的xml文件中命名id形成的唯一的int型标识符* context 关联SimpleAdapter运行着的视图的上下文。data 一个Map的列表。在列表中的每个条目对应列表中的一行，应该包含所有在from中指定的条目resource 一个定义列表项目的视图布局的资源唯一标识。布局文件将至少应包含哪些在to中定义了的名称。from 一个将被添加到Map上关联每一个项目的列名称的列表to 应该在参数from显示列的视图。这些应该全是TextView。在列表中最初的N视图是从参数from中最初的N列获取的值。** 4.把 适配器 添加到ListView,并显示出来。* @author Administrator**/</span><span class="pln"></span><span class="kwd">public</span><span class="pln"> </span><span class="kwd">class</span><span class="pln"> </span><span class="typ">ListViewActivity</span><span class="pln"> </span><span class="kwd">extends</span><span class="pln"> </span><span class="typ">Activity</span><span class="pln"> </span><span class="pun">{</span><span class="pln"></span><span class="typ">ListView</span><span class="pln"> userList</span><span class="pun">;</span><span class="pln"></span><span class="lit">@Override</span><span class="pln"></span><span class="kwd">protected</span><span class="pln"> </span><span class="kwd">void</span><span class="pln"> onCreate</span><span class="pun">(</span><span class="typ">Bundle</span><span class="pln"> savedInstanceState</span><span class="pun">)</span><span class="pln"> </span><span class="pun">{</span><span class="pln"></span><span class="kwd">super</span><span class="pun">.</span><span class="pln">onCreate</span><span class="pun">(</span><span class="pln">savedInstanceState</span><span class="pun">);</span><span class="pln">setContentView</span><span class="pun">(</span><span class="pln">R</span><span class="pun">.</span><span class="pln">layout</span><span class="pun">.</span><span class="pln">listview</span><span class="pun">);</span><span class="pln">userList </span><span class="pun">=</span><span class="pln"> </span><span class="pun">(</span><span class="typ">ListView</span><span class="pun">)</span><span class="pln">findViewById</span><span class="pun">(</span><span class="pln">R</span><span class="pun">.</span><span class="pln">id</span><span class="pun">.</span><span class="pln">listUserInfo</span><span class="pun">);</span><span class="pln"></span><span class="typ">ArrayList</span><span class="pun">&</span><span class="pln">gt</span><span class="pun">;</span><span class="pln"> listData </span><span class="pun">=</span><span class="pln"> </span><span class="kwd">new</span><span class="pln"> </span><span class="typ">ArrayList</span><span class="pun">&</span><span class="pln">gt</span><span class="pun">;();</span><span class="pln"></span><span class="typ">HashMap</span><span class="pln"> hmItem </span><span class="pun">=</span><span class="pln"> </span><span class="kwd">new</span><span class="pln"> </span><span class="typ">HashMap</span><span class="pun">();</span><span class="pln">hmItem</span><span class="pun">.</span><span class="pln">put</span><span class="pun">(</span><span class="str">"userName"</span><span class="pun">,</span><span class="pln"> </span><span class="str">"张三"</span><span class="pun">);</span><span class="pln">hmItem</span><span class="pun">.</span><span class="pln">put</span><span class="pun">(</span><span class="str">"userPhone"</span><span class="pun">,</span><span class="pln"> </span><span class="str">"1234567890"</span><span class="pun">);</span><span class="pln">listData</span><span class="pun">.</span><span class="pln">add</span><span class="pun">(</span><span class="pln">hmItem</span><span class="pun">);</span><span class="pln">hmItem </span><span class="pun">=</span><span class="pln"> </span><span class="kwd">new</span><span class="pln"> </span><span class="typ">HashMap</span><span class="pun">();</span><span class="pln">hmItem</span><span class="pun">.</span><span class="pln">put</span><span class="pun">(</span><span class="str">"userName"</span><span class="pun">,</span><span class="pln"> </span><span class="str">"李四"</span><span class="pun">);</span><span class="pln">hmItem</span><span class="pun">.</span><span class="pln">put</span><span class="pun">(</span><span class="str">"userPhone"</span><span class="pun">,</span><span class="pln"> </span><span class="str">"981234502"</span><span class="pun">);</span><span class="pln">listData</span><span class="pun">.</span><span class="pln">add</span><span class="pun">(</span><span class="pln">hmItem</span><span class="pun">);</span><span class="pln">hmItem </span><span class="pun">=</span><span class="pln"> </span><span class="kwd">new</span><span class="pln"> </span><span class="typ">HashMap</span><span class="pun">();</span><span class="pln">hmItem</span><span class="pun">.</span><span class="pln">put</span><span class="pun">(</span><span class="str">"userName"</span><span class="pun">,</span><span class="pln"> </span><span class="str">"王五"</span><span class="pun">);</span><span class="pln">hmItem</span><span class="pun">.</span><span class="pln">put</span><span class="pun">(</span><span class="str">"userPhone"</span><span class="pun">,</span><span class="pln"> </span><span class="str">"5622435566221"</span><span class="pun">);</span><span class="pln">listData</span><span class="pun">.</span><span class="pln">add</span><span class="pun">(</span><span class="pln">hmItem</span><span class="pun">);</span><span class="pln"></span><span class="com">//SimpleAdapter simpleAdapter = new SimpleAdapter(this, listData, R.layout.textviewitem, new String[]{"userName","userPhone"}, new int[]{R.id.txtUserName,R.id.txtUserPhone});</span><span class="pln"></span><span class="com">//SimpleAdapter simpleAdapter = new SimpleAdapter(this, listData, android.R.layout.simple_list_item_1, new String[]{"userName","userPhone"}, new int[]{android.R.id.text1,android.R.id.text2});</span><span class="pln"></span><span class="com">//SimpleAdapter simpleAdapter = new SimpleAdapter(this, listData, android.R.layout.simple_list_item_2, new String[]{"userName","userPhone"}, new int[]{android.R.id.text1,android.R.id.text2});</span><span class="pln"></span><span class="typ">String</span><span class="pun">[]</span><span class="pln"> s </span><span class="pun">=</span><span class="pln"> </span><span class="kwd">new</span><span class="pln"> </span><span class="typ">String</span><span class="pun">[</span><span class="lit">2</span><span class="pun">];</span><span class="pln">s</span><span class="pun">[</span><span class="lit">0</span><span class="pun">]</span><span class="pln"> </span><span class="pun">=</span><span class="pln"> </span><span class="str">"userName"</span><span class="pun">;</span><span class="pln">s</span><span class="pun">[</span><span class="lit">1</span><span class="pun">]</span><span class="pln"> </span><span class="pun">=</span><span class="pln"> </span><span class="str">"userPhone"</span><span class="pun">;</span><span class="pln"></span><span class="kwd">int</span><span class="pun">[]</span><span class="pln"> i </span><span class="pun">=</span><span class="pln"> </span><span class="kwd">new</span><span class="pln"> </span><span class="kwd">int</span><span class="pun">[</span><span class="lit">2</span><span class="pun">];</span><span class="pln">i</span><span class="pun">[</span><span class="lit">0</span><span class="pun">]</span><span class="pln"> </span><span class="pun">=</span><span class="pln"> android</span><span class="pun">.</span><span class="pln">R</span><span class="pun">.</span><span class="pln">id</span><span class="pun">.</span><span class="pln">text1</span><span class="pun">;</span><span class="pln">i</span><span class="pun">[</span><span class="lit">1</span><span class="pun">]</span><span class="pln"> </span><span class="pun">=</span><span class="pln"> android</span><span class="pun">.</span><span class="pln">R</span><span class="pun">.</span><span class="pln">id</span><span class="pun">.</span><span class="pln">text2</span><span class="pun">;</span><span class="pln"></span><span class="typ">SimpleAdapter</span><span class="pln"> sim </span><span class="pun">=</span><span class="pln"> </span><span class="kwd">new</span><span class="pln"> </span><span class="typ">SimpleAdapter</span><span class="pun">(</span><span class="kwd">this</span><span class="pun">,</span><span class="pln"> listData</span><span class="pun">,</span><span class="pln"> android</span><span class="pun">.</span><span class="pln">R</span><span class="pun">.</span><span class="pln">layout</span><span class="pun">.</span><span class="pln">simple_list_item_1</span><span class="pun">,</span><span class="pln"> s</span><span class="pun">,</span><span class="pln"> i</span><span class="pun">);</span><span class="pln">userList</span><span class="pun">.</span><span class="pln">setAdapter</span><span class="pun">(</span><span class="pln">sim</span><span class="pun">);</span><span class="pln"></span><span class="com">//列表项单击事件</span><span class="pln">userList</span><span class="pun">.</span><span class="pln">setOnItemClickListener</span><span class="pun">(</span><span class="kwd">new</span><span class="pln"> </span><span class="typ">ListView</span><span class="pun">.</span><span class="typ">OnItemClickListener</span><span class="pun">()</span><span class="pln"> </span><span class="pun">{</span><span class="pln"></span><span class="lit">@Override</span><span class="pln"></span><span class="kwd">public</span><span class="pln"> </span><span class="kwd">void</span><span class="pln"> onItemClick</span><span class="pun">(</span><span class="typ">AdapterView</span><span class="pun"><!--?--></span><span class="pln"> arg0</span><span class="pun">,</span><span class="pln"> </span><span class="typ">View</span><span class="pln"> arg1</span><span class="pun">,</span><span class="pln"> </span><span class="kwd">int</span><span class="pln"> arg2</span><span class="pun">,</span><span class="pln"></span><span class="kwd">long</span><span class="pln"> arg3</span><span class="pun">)</span><span class="pln"> </span><span class="pun">{</span><span class="pln"></span><span class="typ">System</span><span class="pun">.</span><span class="kwd">out</span><span class="pun">.</span><span class="pln">println</span><span class="pun">(</span><span class="pln">arg2</span><span class="pun">);</span><span class="pln"></span><span class="typ">System</span><span class="pun">.</span><span class="kwd">out</span><span class="pun">.</span><span class="pln">println</span><span class="pun">(</span><span class="pln">arg3</span><span class="pun">);</span><span class="pln"></span><span class="pun">}</span><span class="pln"></span><span class="pun">});</span><span class="pln"></span><span class="com">//列表项选中事件</span><span class="pln">userList</span><span class="pun">.</span><span class="pln">setOnItemSelectedListener</span><span class="pun">(</span><span class="kwd">new</span><span class="pln"> </span><span class="typ">ListView</span><span class="pun">.</span><span class="typ">OnItemSelectedListener</span><span class="pun">()</span><span class="pln"> </span><span class="pun">{</span><span class="pln"></span><span class="lit">@Override</span><span class="pln"></span><span class="kwd">public</span><span class="pln"> </span><span class="kwd">void</span><span class="pln"> onItemSelected</span><span class="pun">(</span><span class="typ">AdapterView</span><span class="pun"><!--?--></span><span class="pln"> arg0</span><span class="pun">,</span><span class="pln"> </span><span class="typ">View</span><span class="pln"> arg1</span><span class="pun">,</span><span class="pln"></span><span class="kwd">int</span><span class="pln"> arg2</span><span class="pun">,</span><span class="pln"> </span><span class="kwd">long</span><span class="pln"> arg3</span><span class="pun">)</span><span class="pln"> </span><span class="pun">{</span><span class="pln"></span><span class="com">// TODO Auto-generated method stub</span><span class="pln"></span><span class="typ">System</span><span class="pun">.</span><span class="kwd">out</span><span class="pun">.</span><span class="pln">println</span><span class="pun">(</span><span class="str">"selected----------"</span><span class="pln"> </span><span class="pun">+</span><span class="pln">arg2</span><span class="pun">);</span><span class="pln"></span><span class="typ">System</span><span class="pun">.</span><span class="kwd">out</span><span class="pun">.</span><span class="pln">println</span><span class="pun">(</span><span class="str">"selected----------"</span><span class="pln"> </span><span class="pun">+</span><span class="pln">arg3</span><span class="pun">);</span><span class="pln"></span><span class="pun">}</span><span class="pln"></span><span class="lit">@Override</span><span class="pln"></span><span class="kwd">public</span><span class="pln"> </span><span class="kwd">void</span><span class="pln"> onNothingSelected</span><span class="pun">(</span><span class="typ">AdapterView</span><span class="pun"><!--?--></span><span class="pln"> arg0</span><span class="pun">)</span><span class="pln"> </span><span class="pun">{</span><span class="pln"></span><span class="com">// TODO Auto-generated method stub</span><span class="pln"></span><span class="pun">}</span><span class="pln"></span><span class="pun">});</span><span class="pln"></span><span class="com">//列表项长按事件</span><span class="pln">userList</span><span class="pun">.</span><span class="pln">setOnItemLongClickListener</span><span class="pun">(</span><span class="kwd">new</span><span class="pln"> </span><span class="typ">ListView</span><span class="pun">.</span><span class="typ">OnItemLongClickListener</span><span class="pun">()</span><span class="pln"> </span><span class="pun">{</span><span class="pln"></span><span class="lit">@Override</span><span class="pln"></span><span class="kwd">public</span><span class="pln"> </span><span class="kwd">boolean</span><span class="pln"> onItemLongClick</span><span class="pun">(</span><span class="typ">AdapterView</span><span class="pun"><!--?--></span><span class="pln"> arg0</span><span class="pun">,</span><span class="pln"> </span><span class="typ">View</span><span class="pln"> arg1</span><span class="pun">,</span><span class="pln"></span><span class="kwd">int</span><span class="pln"> arg2</span><span class="pun">,</span><span class="pln"> </span><span class="kwd">long</span><span class="pln"> arg3</span><span class="pun">)</span><span class="pln"> </span><span class="pun">{</span><span class="pln"></span><span class="typ">System</span><span class="pun">.</span><span class="kwd">out</span><span class="pun">.</span><span class="pln">println</span><span class="pun">(</span><span class="str">"long---------"</span><span class="pln"> </span><span class="pun">+</span><span class="pln"> arg2</span><span class="pun">);</span><span class="pln"></span><span class="typ">System</span><span class="pun">.</span><span class="kwd">out</span><span class="pun">.</span><span class="pln">println</span><span class="pun">(</span><span class="str">"long---------"</span><span class="pln"> </span><span class="pun">+</span><span class="pln"> arg3</span><span class="pun">);</span><span class="pln"></span><span class="kwd">return</span><span class="pln"> </span><span class="kwd">true</span><span class="pun">;</span><span class="pln"></span><span class="pun">}</span><span class="pln"></span><span class="pun">});</span><span class="pln"></span><span class="pun">}</span><span class="pln"></span><span class="pun">}</span><span class="pln"></span> |
上边注释的三句话
第一句 是我们可以自定义布局文件展示数据
第二句 我们可以用内置的布局文件来展示
第三句 和第二句一样，但是效果不一样，大家运行看看就明白了
GridView
类似与手机主菜单中展示的效果，如图
网格视图控件和我们的ListView 操作很像，上边已经解释过了，这里直接贴代码了
<span class="kwd">package</span><span class="pln"> TSD</span><span class="pun">.</span><span class="typ">Jason</span><span class="pun">.</span><span class="typ">Example</span><span class="pun">;</span><span class="pln"></span><span class="kwd">import</span><span class="pln"> java</span><span class="pun">.</span><span class="pln">util</span><span class="pun">.</span><span class="typ">ArrayList</span><span class="pun">;</span><span class="pln"></span><span class="kwd">import</span><span class="pln"> java</span><span class="pun">.</span><span class="pln">util</span><span class="pun">.</span><span class="typ">HashMap</span><span class="pun">;</span><span class="pln"></span><span class="kwd">import</span><span class="pln"> android</span><span class="pun">.</span><span class="pln">app</span><span class="pun">.</span><span class="typ">Activity</span><span class="pun">;</span><span class="pln"></span><span class="kwd">import</span><span class="pln"> android</span><span class="pun">.</span><span class="pln">os</span><span class="pun">.</span><span class="typ">Bundle</span><span class="pun">;</span><span class="pln"></span><span class="kwd">import</span><span class="pln"> android</span><span class="pun">.</span><span class="pln">widget</span><span class="pun">.</span><span class="typ">GridView</span><span class="pun">;</span><span class="pln"></span><span class="kwd">import</span><span class="pln"> android</span><span class="pun">.</span><span class="pln">widget</span><span class="pun">.</span><span class="typ">SimpleAdapter</span><span class="pun">;</span><span class="pln"></span><span class="kwd">public</span><span class="pln"> </span><span class="kwd">class</span><span class="pln"> </span><span class="typ">GridViewActivity</span><span class="pln"> </span><span class="kwd">extends</span><span class="pln"> </span><span class="typ">Activity</span><span class="pln"> </span><span class="pun">{</span><span class="pln"></span><span class="com">// 定义整型数组 即图片源</span><span class="pln"></span><span class="kwd">private</span><span class="pln"> </span><span class="typ">Integer</span><span class="pun">[]</span><span class="pln"> mImageIds </span><span class="pun">=</span><span class="pln"></span><span class="pun">{</span><span class="pln">R</span><span class="pun">.</span><span class="pln">drawable</span><span class="pun">.</span><span class="pln">img1</span><span class="pun">,</span><span class="pln">R</span><span class="pun">.</span><span class="pln">drawable</span><span class="pun">.</span><span class="pln">img2</span><span class="pun">,</span><span class="pln">R</span><span class="pun">.</span><span class="pln">drawable</span><span class="pun">.</span><span class="pln">img3</span><span class="pun">,</span><span class="pln">R</span><span class="pun">.</span><span class="pln">drawable</span><span class="pun">.</span><span class="pln">img4</span><span class="pun">,</span><span class="pln">R</span><span class="pun">.</span><span class="pln">drawable</span><span class="pun">.</span><span class="pln">img5</span><span class="pun">,</span><span class="pln">R</span><span class="pun">.</span><span class="pln">drawable</span><span class="pun">.</span><span class="pln">img6</span><span class="pun">,</span><span class="pln">R</span><span class="pun">.</span><span class="pln">drawable</span><span class="pun">.</span><span class="pln">img7</span><span class="pun">,</span><span class="pln">R</span><span class="pun">.</span><span class="pln">drawable</span><span class="pun">.</span><span class="pln">img8</span><span class="pun">,</span><span class="pln">R</span><span class="pun">.</span><span class="pln">drawable</span><span class="pun">.</span><span class="pln">img1</span><span class="pun">,</span><span class="pln"></span><span class="pun">};</span><span class="pln"></span><span class="lit">@Override</span><span class="pln"></span><span class="kwd">protected</span><span class="pln"> </span><span class="kwd">void</span><span class="pln"> onCreate</span><span class="pun">(</span><span class="typ">Bundle</span><span class="pln"> savedInstanceState</span><span class="pun">)</span><span class="pln"> </span><span class="pun">{</span><span class="pln"></span><span class="com">// TODO Auto-generated method stub</span><span class="pln"></span><span class="kwd">super</span><span class="pun">.</span><span class="pln">onCreate</span><span class="pun">(</span><span class="pln">savedInstanceState</span><span class="pun">);</span><span class="pln">setContentView</span><span class="pun">(</span><span class="pln">R</span><span class="pun">.</span><span class="pln">layout</span><span class="pun">.</span><span class="pln">gridview</span><span class="pun">);</span><span class="pln"></span><span class="typ">GridView</span><span class="pln"> gridview </span><span class="pun">=</span><span class="pln"> </span><span class="pun">(</span><span class="typ">GridView</span><span class="pun">)</span><span class="pln"> findViewById</span><span class="pun">(</span><span class="pln">R</span><span class="pun">.</span><span class="pln">id</span><span class="pun">.</span><span class="pln">gridview</span><span class="pun">);</span><span class="pln"></span><span class="com">// 生成动态数组，并且转入数据</span><span class="pln"></span><span class="typ">ArrayList</span><span class="pun">&</span><span class="pln">gt</span><span class="pun">;</span><span class="pln"> lstImageItem </span><span class="pun">=</span><span class="pln"> </span><span class="kwd">new</span><span class="pln"> </span><span class="typ">ArrayList</span><span class="pun">&</span><span class="pln">gt</span><span class="pun">;();</span><span class="pln"></span><span class="kwd">for</span><span class="pln"> </span><span class="pun">(</span><span class="kwd">int</span><span class="pln"> i </span><span class="pun">=</span><span class="pln"> </span><span class="lit">0</span><span class="pun">;</span><span class="pln"> i </span><span class="pun">&</span><span class="pln">lt</span><span class="pun">;</span><span class="pln"> </span><span class="lit">9</span><span class="pun">;</span><span class="pln"> i</span><span class="pun">++)</span><span class="pln"> </span><span class="pun">{</span><span class="pln"></span><span class="typ">HashMap</span><span class="pln"> map </span><span class="pun">=</span><span class="pln"> </span><span class="kwd">new</span><span class="pln"> </span><span class="typ">HashMap</span><span class="pun">();</span><span class="pln">map</span><span class="pun">.</span><span class="pln">put</span><span class="pun">(</span><span class="str">"ItemImage"</span><span class="pun">,</span><span class="pln"> mImageIds</span><span class="pun">[</span><span class="pln">i</span><span class="pun">]);</span><span class="com">// 添加图像资源的ID</span><span class="pln">map</span><span class="pun">.</span><span class="pln">put</span><span class="pun">(</span><span class="str">"ItemText"</span><span class="pun">,</span><span class="pln"> </span><span class="str">"NO."</span><span class="pln"> </span><span class="pun">+</span><span class="pln"> </span><span class="typ">String</span><span class="pun">.</span><span class="pln">valueOf</span><span class="pun">(</span><span class="pln">i</span><span class="pun">));</span><span class="com">// 按序号做ItemText</span><span class="pln">lstImageItem</span><span class="pun">.</span><span class="pln">add</span><span class="pun">(</span><span class="pln">map</span><span class="pun">);</span><span class="pln"></span><span class="pun">}</span><span class="pln"></span><span class="typ">SimpleAdapter</span><span class="pln"> simple </span><span class="pun">=</span><span class="pln"> </span><span class="kwd">new</span><span class="pln"> </span><span class="typ">SimpleAdapter</span><span class="pun">(</span><span class="kwd">this</span><span class="pun">,</span><span class="pln"> lstImageItem</span><span class="pun">,</span><span class="pln">R</span><span class="pun">.</span><span class="pln">layout</span><span class="pun">.</span><span class="pln">gridviewitem</span><span class="pun">,</span><span class="pln"></span><span class="kwd">new</span><span class="pln"> </span><span class="typ">String</span><span class="pun">[]</span><span class="pln"> </span><span class="pun">{</span><span class="pln"> </span><span class="str">"ItemImage"</span><span class="pun">,</span><span class="pln"> </span><span class="str">"ItemText"</span><span class="pln"> </span><span class="pun">},</span><span class="pln"> </span><span class="kwd">new</span><span class="pln"> </span><span class="kwd">int</span><span class="pun">[]</span><span class="pln"> </span><span class="pun">{</span><span class="pln">R</span><span class="pun">.</span><span class="pln">id</span><span class="pun">.</span><span class="typ">ItemImage</span><span class="pun">,</span><span class="pln"> R</span><span class="pun">.</span><span class="pln">id</span><span class="pun">.</span><span class="typ">ItemText</span><span class="pln"> </span><span class="pun">});</span><span class="pln">gridview</span><span class="pun">.</span><span class="pln">setAdapter</span><span class="pun">(</span><span class="pln">simple</span><span class="pun">);</span><span class="pln"></span><span class="pun">}</span><span class="pln"></span><span class="pun">}</span><span class="pln"></span> |
好，今天就到这里，源代码已经上传到天圣达网站，大家去下载下来，动手实践下。 http://www.bj-stl.com/android.html
