Android WebView中打开相机拍照和选择相册 - CSDN博客

来源： Android WebView中打开相机拍照和选择相册 – CSDN博客

一般在项目中与js交互，可能会遇到上传文件图片等操作，避免不了一些坑，下面简单说一下，Android 在不同版本中webView调用相机，选择相册的方法是不一样的，3.0以下的调用

3.0以上：

4.4以下：

5.0以上：

这里有个漏洞，4.4.x的由于系统内核发生了改变，没法调用以上方法，现在仍然找不到解决办法，唯一的方法就是4.4直接使用手机浏览器打开，这个是可以的。

那下面具体的贴下代码：

继承自WebChromeClient，重写

//3.0++
public void openFileChooser(ValueCallback<Uri> uploadMsg, String acceptType) {
    openFileChooserImpl(uploadMsg);
}

//3.0--
public void openFileChooser(ValueCallback<Uri> uploadMsg) {
    openFileChooserImpl(uploadMsg);
}

//4.1
public void openFileChooser(ValueCallback<Uri> uploadMsg, String acceptType, String capture) {

    openFileChooserImpl(uploadMsg);
}


@Override
public boolean onShowFileChooser(WebView mWebView, ValueCallback<Uri[]> filePathCallback, FileChooserParams fileChooserParams) {
    openFileChooserImplForAndroid5(filePathCallback);

    return true;
}

外层定义接收返回值：

private ValueCallback<Uri> mUploadMessage;
private ValueCallback<Uri[]> mUploadCallbackAboveL;

不同的版本调不同的方法：

private void openFileChooserImplForAndroid5(ValueCallback<Uri[]> uploadMsg) {
    mUploadCallbackAboveL = uploadMsg;
    dispatchTakePictureIntent();
}

//5.0以下的掉用
private void openFileChooserImpl(ValueCallback<Uri> uploadMsg) {
    mUploadMessage = uploadMsg;
    dispatchTakePictureIntent();
}

//拍照
private void dispatchTakePictureIntent() {
    selectImgDialog();

}

我下面就把代码全部贴出来吧：

   private void takePhoto() {
        Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
        if (takePictureIntent.resolveActivity(getActivity().getPackageManager()) != null) {
            Uri imageUri = null;
            try {
                imageUri = Uri.fromFile(createImageFile());
            } catch (IOException e) {
                e.printStackTrace();
            }
            takePictureIntent.putExtra(MediaStore.EXTRA_OUTPUT, imageUri);
            startActivityForResult(takePictureIntent, FILECHOOSER_RESULTCODE);
        }
    }

    /**
     * 209.
     * 本地相册选择图片
     * 210.
     */
    private void chosePic() {
        Intent innerIntent = new Intent(Intent.ACTION_GET_CONTENT);
        String IMAGE_UNSPECIFIED = "image/*";
        innerIntent.setType(IMAGE_UNSPECIFIED); // 查看类型
        Intent wrapperIntent = Intent.createChooser(innerIntent, null);
        startActivityForResult(wrapperIntent, REQ_CHOOSE);
    }


    String mCurrentPhotoPath = null;
    String FileName = "forum";

    //创建文件夹包装图片
    private File createImageFile() throws IOException {
        File storageDir = new File(Util.getAppPath(getActivity()) + FileName);

        if (!storageDir.exists()) {
            storageDir.mkdirs();
        }
        storageDir = new File(Util.getAppPath(getActivity()) + FileName + "/", System.currentTimeMillis() + ".jpg");
        //保存当前图片路径
        mCurrentPhotoPath = storageDir.getAbsolutePath();
        return storageDir;
    }

    //onActivityResult回调
    @Override
    public void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);

        if (requestCode == FILECHOOSER_RESULTCODE || requestCode == REQ_CHOOSE) {
            if (null == mUploadMessage && null == mUploadCallbackAboveL) return;
            Uri result = data == null || resultCode != RESULT_OK ? null : data.getData();
            if (mUploadCallbackAboveL != null) {
                onActivityResultAboveL(requestCode, data);
            } else if (mUploadMessage != null) {
                mUploadMessage.onReceiveValue(result);
                mUploadMessage = null;
            }
        }

    }

    //5.0以上版本，由于api不一样，要单独处理
//    @TargetApi(Build.VERSION_CODES.LOLLIPOP)
    private void onActivityResultAboveL(int requestCode, Intent data) {

        if (mUploadCallbackAboveL == null) {
            return;
        }
        Uri result = null;
        if (requestCode == FILECHOOSER_RESULTCODE) {
            File file = new File(mCurrentPhotoPath);
            Uri localUri = Uri.fromFile(file);
            Intent localIntent = new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE, localUri);
            getActivity().sendBroadcast(localIntent);
            result = Uri.fromFile(file);

        } else if (requestCode == REQ_CHOOSE) {
            result = data.getData();
        }
        mUploadCallbackAboveL.onReceiveValue(new Uri[]{result});
        mUploadCallbackAboveL = null;
        return;
    }

后补的代码：

private void openFileChooserImplForAndroid5(ValueCallback<Uri[]> uploadMsg) {
    mUploadCallbackAboveL = uploadMsg;
    dispatchTakePictureIntent();
}

//5.0以下的掉用
private void openFileChooserImpl(ValueCallback<Uri> uploadMsg) {
    mUploadMessage = uploadMsg;
    dispatchTakePictureIntent();
}

基本代码就是以上这些，selectImgDialog()方法是弹窗提示选择，关于这个弹窗布局的用法，之前写的一篇文章说的很清楚了(BottomSheet 的详解及注意事项)，有疑问的欢迎提问。