效果：一个手指实现（所有手势事件）和（部分事件的）；
A. 所有手势
activity_main.xml
MainActivity.java
public class MainActivity extends Activity
{
private static final String LOG_TAG = "HelloGesture";
private GestureDetector mGestureDetector = null;
private TextView mGestureTextView = null;
private TextView mDoubleTapTextView = null;
@Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mGestureTextView = (TextView) findViewById(R.id.gesture);
mDoubleTapTextView = (TextView) findViewById(R.id.doubleTap);
// 构造GestureDetector对象，传入监听器对象
mGestureDetector = new GestureDetector(this, mOnGestureListener);
// 传入双击监听器对象
mGestureDetector.setonDoubleTapListener(mDoubleTapListener);
}
@Override public boolean onTouchEvent(MotionEvent event)
{
// 在onTouchEvent方法中将事件传递给手势检测对象，否则手势监听对象中的回调函数是不会被调用的
mGestureDetector.onTouchEvent(event);
return super.onTouchEvent(event);
}
private onGestureListener monGestureListener = new onGestureListener()
{
@Override
public boolean onSingleTapUp(MotionEvent e)
{
Log.i(LOG_TAG, "onSingleTapUp: " + e.toString());
mGestureTextView.setText("onSingleTapUp: ");
return false;
}
@Override
public void onShowPress(MotionEvent e)
{
Log.i(LOG_TAG, "onShowPress: " + e.toString());
mGestureTextView.setText("onShowPress: ");
}
@Override
public boolean onScroll(MotionEvent e1, MotionEvent e2,
float distanceX, float distanceY)
{
Log.i(LOG_TAG, "onScroll: " + e1.toString() + ", " + e2.toString());
mGestureTextView.setText("onScroll ");
return false;
} @Override
public void onLongPress(MotionEvent e)
{
Log.i(LOG_TAG, "onLongPress: " + e.toString());
mGestureTextView.setText("onLongPress: ");
}
@Override
public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX,
float velocityY)
{
Log.i(LOG_TAG, "onFling: " + e1.toString() + ", " + e2.toString());
mGestureTextView.setText("onFling ");
return false;
}
@Override
public boolean onDown(MotionEvent e)
{
Log.i(LOG_TAG, "onDown: " + e.toString());
mGestureTextView.setText("onDown: ");
return false;
}
}; private onDoubleTapListener mDoubleTapListener = new onDoubleTapListener()
{
@Override
public boolean onSingleTap/confirm/ied(MotionEvent e)
{
Log.i("LOG_TAG", "onSingleTap/confirm/ied: " + e.toString());
mDoubleTapTextView.setText("onSingleTap/confirm/ied: ");
return false;
}
@Override
public boolean onDoubleTapEvent(MotionEvent e)
{
Log.i("LOG_TAG", "onDoubleTapEvent: " + e.toString());
mDoubleTapTextView.setText("onDoubleTapEvent: ");
return false;
}
@Override
public boolean onDoubleTap(MotionEvent e)
{
Log.i("LOG_TAG", "onDoubleTap: " + e.toString());
mDoubleTapTextView.setText("onDoubleTap: ");
return false;
}
};}
B. 部分手势
如果你仅仅只想处理几种手势，你可以选择继承GestureDetector.SimpleOnGestureListener类，而不是实现
GestureDetector.OnGestureListener接口
MainActivity.java
public class MainActivity extends Activity
{
private GestureDetector mGestureDetector = null;
private TextView mGestureTextView = null;
private TextView mDoubleTapTextView = null;
@Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mGestureTextView = (TextView) findViewById(R.id.gesture);
mDoubleTapTextView = (TextView) findViewById(R.id.doubleTap);
// 构造GestureDetector对象，传入监听器对象
mGestureDetector = new GestureDetector(this, new MyGestureListener());
// 传入双击监听器对象
}
@Override
public boolean onTouchEvent(MotionEvent event)
{
// 在onTouchEvent方法中将事件传递给手势检测对象，否则手势监听对象中的回调函数是不会被调用的
this.mGestureDetector.onTouchEvent(event);
return super.onTouchEvent(event);
}
class MyGestureListener extends GestureDetector.SimpleonGestureListener
{
private static final String DEBUG_TAG = "Gestures";
@Override
public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX,
float velocityY)
{
Log.d(DEBUG_TAG, "onFling: " + e1.toString() + ", " + e2.toString());
mGestureTextView.setText("onFling ");
return false;
}
@Override
public boolean onDown(MotionEvent e)
{
Log.d(DEBUG_TAG, "onDown: " + e.toString());
mGestureTextView.setText("onDown: ");
return false;
}
}}
