如何使用 View.OnTouchListener 而不是 onClick [英] How to use View.OnTouchListener instead of onClick

问题描述

我正在为客户开发 Android 2.2.2 应用程序，他想要执行以下操作:

I'm developing an Android 2.2.2 application for a client and he wants to do the following:

现在我有一个带有 onClick 事件的按钮，但他不喜欢，他想检测用户何时释放按钮.

Now I have a button with an onClick event but he doesn't like, he wants to dectect when user release the button.

我发现 View.OnTouchListener 我认为这就是我需要的使用但是，是否有可能像我对 onClick 所做的那样将此事件添加到 xml 中?

I've found View.OnTouchListener which I think this is what I need to use but, is there any posibility to add this event to xml like I did with onClick?

<ImageButton
    android:id="@+id/btnSaveNewGate"
    android:layout_width="@dimen/btnSaveNewGate_width"
    android:layout_height="@dimen/btnSaveNewGate_height"
    android:layout_below="@+id/radioGrGateType"
    android:layout_centerHorizontal="true"
    android:layout_marginTop="@dimen/btnSaveNewGate_marginTop"
    android:background="@null"
    android:contentDescription="@string/layout_empty"
    android:onClick="onSaveNewGateClick"
    android:scaleType="fitXY"
    android:src="@drawable/save_gate_selector" />

我还有两个问题:

用户松开手指时关联的事件是什么?

Which is the event associated when user releases his finger?

是否有任何准则禁止使用 View.OnTouchListener 而不是 onClick?

Is there any guidelines which prohibit using View.OnTouchListener instead of onClick?

推荐答案

用户松开手指的事件是MotionEvent.ACTION_UP.我不知道是否有任何准则禁止使用 View.OnTouchListener 而不是 onClick()，这很可能取决于具体情况.

The event when user releases his finger is MotionEvent.ACTION_UP. I'm not aware if there are any guidelines which prohibit using View.OnTouchListener instead of onClick(), most probably it depends of situation.

这是一个示例代码:

imageButton.setOnTouchListener(new OnTouchListener() {
    @Override
    public boolean onTouch(View v, MotionEvent event) {
        if(event.getAction() == MotionEvent.ACTION_UP){

            // Do what you want
            return true;
        }
        return false;
    }
});

这篇关于如何使用 View.OnTouchListener 而不是 onClick的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！