Question

我需要在用户在listview上保持2秒时启动添加事件。之后振动设备和显示对话框询问＆＃34;添加到收藏夹？＆＃34;。

我已经尝试过这个。

lv.setOnTouchListener(new View.OnTouchListener() {
    @Override
    public boolean onTouch(View v, MotionEvent event) {

        if (event.getAction() == MotionEvent.AXIS_PRESSURE){

            long eventDuration = 
                    android.os.SystemClock.elapsedRealtime() 
                    - event.getDownTime();

        //Put up the Yes/No message box


        AlertDialog.Builder alert = new AlertDialog.Builder(MainActivity.this);

        alert
        .setTitle("Service")
        .setMessage("Add to favorite?")
        //.setIcon(R.drawable.chile1)
        .setPositiveButton("Si", new DialogInterface.OnClickListener() {
            public void onClick(DialogInterface dialog, int which) {                    
                 Intent intent = new Intent(Activity.class);
                    startActivity(intent);

            }

        })
        .setNegativeButton("No", null)                      //Do nothing on no
        .show();

    }
        return false;   
    }

上面的代码显示对话框的5次。

Answer 1

首先，您需要在清单文件中允许振动：

<uses-permission android:name="android.permission.VIBRATE"/>

然后长按你可以像这里一样使用 mListView.setOnItemLongClickListener（）：

list.setOnItemLongClickListener(new AdapterView.OnItemLongClickListener() {
    @Override
    public boolean onItemLongClick(AdapterView<?> p, View v, int i, long id) {
        // Do Stuff
        return false;
    }
});

然后在 Do Stuff 上，您可以调用 Vibrator ，然后打开要求添加到收藏夹的Dialog。 Bellow是你如何称呼振动器：

Vibrator vibrator = (Vibrator) getSystemService(Context.VIBRATOR_SERVICE);
vibrator.vibrate(200); // 200 miliseconds

Answer 2

您可以查看下面的代码：

private View.OnTouchListener onTouchListener = new View.OnTouchListener() {
    @Override
    public boolean onTouch(final View view,
                           final MotionEvent event) {
        switch (event.getAction()) {
            case MotionEvent.ACTION_DOWN:
                handler.postDelayed(mLongPressed,
                                    1000);
                //This is where my code for movement is initialized to get original location.
                break;
            case MotionEvent.ACTION_UP:
                handler.removeCallbacks(mLongPressed);

                break;
            case MotionEvent.ACTION_MOVE:
                handler.removeCallbacks(mLongPressed);
                //Code for movement here. This may include using a window manager to update the view
                break;
        }
        return true;        }
};



//Put this into the class
final Handler handler = new Handler();
Runnable mLongPressed = new Runnable() {
    public void run() {
        //TODO :show dialog when hold 1s.
        // can you set time show dialog handler.postDelayed(mLongPressed, 1000);

    }
};

设置OnTouch：的 lv.setOnTouchListener（onTouchListener）;

如何在列表视图中用户触摸2秒钟时启动事件？

2 个答案: