在Android小工具检测由下往上触摸事件（或反转） [英] Detect in android widget a touch event from down to up (or the inverse)

问题描述

我怎样才能从下到上（或相反）的Andr​​oid小工具（SDK 2.3.3）？

How I can detect a touch event from down to up (or the inverse) in Android widget (sdk 2.3.3)?

推荐答案

尝试一个OnTouchListener设置窗口小部件并获取事件codeS与event.getAction（）;

Try setting an OnTouchListener to the widget and getting the event codes with event.getAction();

假设你的小部件是一个ImageView的。在XML定义：

Suppose your widget is an ImageView. In xml define:

<ImageView android:id="@+id/imageview"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:clickable="true"
android:src="@drawable/image"/>

和在Java中，你的code将是：

and in Java, your code would be:

ImageView mImageView = (ImageView)findViewById(R.id.imageview);

mImageView.setOnTouchListener(new OnTouchListener(){
     @Override
     public boolean onTouch (View v, MotionEvent event){
         if(event.getAction() == MotionEvent.DOWN){
             //do something
         }else if (event.getAction() == MotionEvent.UP){
             // do something
         }else if (event.getAction() == MotionEvent.MOVE){
            //do something
         }
     }
}):

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