webView文件上传取消弹窗后再次点击不响应点击事件问题

webView文件上传取消弹窗后再次点击不响应点击事件问题

在android加载h5界面时，如果该h5界面有调用android的手机相册或者相机功能，那么我们的activity里面应该怎么写呢？我的写法适配了android3.0到android7.0，如果安卓5.0以上的手机出现崩溃的问题，可以参考我下面For Android 5.0+的写法

实现方法是

webView_customer.setWebChromeClient(new WebChromeClient() {

            // For Android 3.0+

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

                mUploadMessage = uploadMsg;

                ArrayList<String> list = new ArrayList<String>();

                list.add("拍照");

                list.add("从相册选择");

                showTakePicOrPhotoesDialog(Activity_Customer_Edu.this, "选择", list, new DialogUtils.OnClickPicDialogItemListener() {

                    @Override

                    public void onClickItem(int which) {

                        if(0==which){

                            Intent takeIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);

                            // 下面这句指定调用相机拍照后的照片存储的路径

                            try {

                                File file = createImageFile();

                                takePicUri = Uri.fromFile(file);

                                takeIntent.putExtra(MediaStore.EXTRA_OUTPUT, takePicUri);

                                startActivityForResult(takeIntent, FILECHOOSER_RESULTCODE);

                            } catch (IOException e) {

                                e.printStackTrace();

                            }

                        }else if(1==which){

                            Intent pickIntent = new Intent(Intent.ACTION_PICK, null);                            pickIntent.setDataAndType(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, "image/*");

                            startActivityForResult(pickIntent, FILECHOOSER_RESULTCODE);

                        }

                    }

                });

                          }

            // For Android < 3.0

            public void openFileChooser(ValueCallback<Uri> uploadMsg) {

                openFileChooser(uploadMsg, "");

            }

            // For Android  > 4.1.1

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

                openFileChooser(uploadMsg, acceptType);

            }

            // For Android 5.0+

            public boolean onShowFileChooser (WebView webView, ValueCallback<Uri[]> filePathCallback, WebChromeClient.FileChooserParams fileChooserParams) {

                mUploadCallbackAboveL = filePathCallback;

                ArrayList<String> list = new ArrayList<String>();

                list.add("拍照");

                list.add("从相册选择");

                showTakePicOrPhotoesDialog(Activity_Customer_Edu.this, "选择", list, new DialogUtils.OnClickPicDialogItemListener() {

                    @Override

                    public void onClickItem(int which) {

                        if(0==which){

                            Intent takeIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);

                            // 下面这句指定调用相机拍照后的照片存储的路径

                            try {

                                File file = createImageFile();

                                takePicUri = Uri.fromFile(file);

                                takeIntent.putExtra(MediaStore.EXTRA_OUTPUT, takePicUri);

                                startActivityForResult(takeIntent, FILECHOOSER_RESULTCODE);

                            } catch (IOException e) {

                                e.printStackTrace();

                            }

                        }else if(1==which){

                            Intent pickIntent = new Intent(Intent.ACTION_PICK, null);

                          pickIntent.setDataAndType(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, "image/*");

                            startActivityForResult(pickIntent, FILECHOOSER_RESULTCODE);

                        }

                    }

                });

                return true;

            }

        });

 

OnActivityResult回调方法：这里有个特别注意的地方，当打开拍照按钮时，Intent data这个数据是空，所以不能正常上传，打开拍照的Intent当时传了一个Uri，在OnActivityResult需要判断data是不是空，是空的话，就把传的那个Uri赋值给mUploadMessage.onReceiveValue，如果不为空就传data.getData();具体如下：

@Override

protected void onActivityResult(int requestCode, int resultCode, Intent data) {

    if(requestCode==FILECHOOSER_RESULTCODE){

        Uri result;

        if (null == mUploadMessage && null == mUploadCallbackAboveL){

            return;

        }

      

//如果拍完照点击取消按钮就：
if(resultCode == RESULT_CANCELED){
result = Uri.EMPTY;
}else {
 if(data == null && resultCode != RESULT_OK){
result = Uri.EMPTY;
}else if(data == null){
result = takePicUri;
}else{
result = data.getData();
}
}

        if (mUploadMessage != null) {

            mUploadMessage.onReceiveValue(result);

            mUploadMessage = null;

        }

if (mUploadCallbackAboveL != null) {
mUploadCallbackAboveL.onReceiveValue(new Uri[]{result});
mUploadCallbackAboveL = null;
}

    }

}

 

 

这里有一个问题，点击“取消”或返回按钮，无法重复回调 onShowFileChooser 或openFileChooser方法。解决办法：

定义一个方法：

/**

 * 防止点击dialog的取消按钮之后，就不再次响应点击事件了

 */

public static void cancelCallback(){

    if(mUploadCallbackAboveL!=null){

        mUploadCallbackAboveL.onReceiveValue(null);

    }

    if(mUploadMessage!=null){

        mUploadMessage.onReceiveValue(null);

    }

}

 

在弹窗（dialog）的取消按钮监听的方法中调用上面的cancellCallBack方法。比如我的：

/**

 * 展示拍照或者从相册选择的Dialog

 * @param context

 * @param title

 * @param names

 * @param onClickPicDialogItemListener

 */

public static void showTakePicOrPhotoesDialog(Context context, String title, final ArrayList<String> names, final DialogUtils.OnClickPicDialogItemListener onClickPicDialogItemListener){

    AlertDialog.Builder builder=new AlertDialog.Builder(context);

    builder.setTitle(title);//设置标题

    String[] itemList=(String[]) names.toArray(new String[names.size()]);

    builder.setItems(itemList, new DialogInterface.OnClickListener() {

        @Override

        public void onClick(DialogInterface dialog, int which) {

            onClickPicDialogItemListener.onClickItem(which);

        }

    });

    AlertDialog dialog=builder.create();//获取dialog

    dialog.setOnCancelListener(new DialogInterface.OnCancelListener() {

        @Override

        public void onCancel(DialogInterface dialog) {

            cancelCallback();
        }

    });

    dialog.show();//显示对话框

}