listView.setSelection(0);
public class MainActivity extends Activity implements OnTouchListener{
private GestureDetector mGestureDetector;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mGestureDetector = new GestureDetector(new gestureListener()); //使用派生自OnGestureListener
mGestureDetector.setOnDoubleTapListener(new doubleTapListener());
TextView tv = (TextView)findViewById(R.id.tv);
tv.setOnTouchListener(this);
tv.setFocusable(true);
tv.setClickable(true);
tv.setLongClickable(true);
}
/*
* 在onTouch()方法中，我们调用GestureDetector的onTouchEvent()方法，将捕捉到的MotionEvent交给GestureDetector
* 来分析是否有合适的callback函数来处理用户的手势
*/
public boolean onTouch(View v, MotionEvent event) {
return mGestureDetector.onTouchEvent(event);
}
//OnGestureListener监听
private class gestureListener implements GestureDetector.OnGestureListener{
public boolean onDown(MotionEvent e) {
Log.i("MyGesture", "onDown");
Toast.makeText(MainActivity.this, "onDown", Toast.LENGTH_SHORT).show();
return false;
}
public void onShowPress(MotionEvent e) {
Log.i("MyGesture", "onShowPress");
Toast.makeText(MainActivity.this, "onShowPress", Toast.LENGTH_SHORT).show();
}
public boolean onSingleTapUp(MotionEvent e) {
Log.i("MyGesture", "onSingleTapUp");
Toast.makeText(MainActivity.this, "onSingleTapUp", Toast.LENGTH_SHORT).show();
return true;
}
public boolean onScroll(MotionEvent e1, MotionEvent e2,
float distanceX, float distanceY) {
Log.i("MyGesture22", "onScroll:"+(e2.getX()-e1.getX()) +" "+distanceX);
Toast.makeText(MainActivity.this, "onScroll", Toast.LENGTH_LONG).show();
return true;
}
public void onLongPress(MotionEvent e) {
Log.i("MyGesture", "onLongPress");
Toast.makeText(MainActivity.this, "onLongPress", Toast.LENGTH_LONG).show();
}
public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX,
float velocityY) {
Log.i("MyGesture", "onFling");
Toast.makeText(MainActivity.this, "onFling", Toast.LENGTH_LONG).show();
return true;
}
};
//OnDoubleTapListener监听
private class doubleTapListener implements GestureDetector.OnDoubleTapListener{
public boolean onSingleTapConfirmed(MotionEvent e) {
Log.i("MyGesture", "onSingleTapConfirmed");
Toast.makeText(MainActivity.this, "onSingleTapConfirmed", Toast.LENGTH_LONG).show();
return true;
}
public boolean onDoubleTap(MotionEvent e) {
Log.i("MyGesture", "onDoubleTap");
Toast.makeText(MainActivity.this, "onDoubleTap", Toast.LENGTH_LONG).show();
return true;
}
public boolean onDoubleTapEvent(MotionEvent e) {
Log.i("MyGesture", "onDoubleTapEvent");
Toast.makeText(MainActivity.this, "onDoubleTapEvent", Toast.LENGTH_LONG).show();
return true;
}
};
}
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