本文主要是介绍GestureDetector_SimpleOnGestureListener，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！
SimpleOnGestureListener类是GestureDetector提供给我们的一个更方便的响应不同手势的类，它实现了OnGestureListener，OnDoubleTapListener两个接口，该类是static class，也就是说它实际上是一个外部类，我们可以在外部继承这个类，重写里面的手势处理方法。
有些手势动作我们用不到，但是还要重载。SimpleOnGestureListener类的出现为我们解决了这个问题，如果你想“Detecting a Subset of Supported Gestures”,SimpleOnGestureListener是最好的选择。
public class MyGesture extends Activity implements OnTouchListener { private GestureDetector mGestureDetector; public MyGesture() { mGestureDetector = new GestureDetector(new MySimpleGesture()); } public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); TextView tv = (TextView) findViewById(R.id.tv); tv.setOnTouchListener(this); tv.setFocusable(true); tv.setClickable(true); tv.setLongClickable(true); } public boolean onTouch(View v, MotionEvent event) { if (event.getAction() == MotionEvent.ACTION_UP) { Log.i("MyGesture", "MotionEvent.ACTION_UP"); } return mGestureDetector.onTouchEvent(event); } // SimpleOnGestureListener implements GestureDetector.OnDoubleTapListener, GestureDetector.OnGestureListener private class MySimpleGesture extends SimpleOnGestureListener { // 双击的第二下Touch down时触发 public boolean onDoubleTap(MotionEvent e) { Log.i("MyGesture", "onDoubleTap"); return super.onDoubleTap(e); } // 双击的第二下Touch down和up都会触发，可用e.getAction()区分 public boolean onDoubleTapEvent(MotionEvent e) { Log.i("MyGesture", "onDoubleTapEvent"); return super.onDoubleTapEvent(e); } // Touch down时触发 public boolean onDown(MotionEvent e) { Log.i("MyGesture", "onDown"); return super.onDown(e); } // Touch了滑动一点距离后，up时触发 public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) { Log.i("MyGesture", "onFling"); return super.onFling(e1, e2, velocityX, velocityY); } // Touch了不移动一直Touch down时触发 public void onLongPress(MotionEvent e) { Log.i("MyGesture", "onLongPress"); super.onLongPress(e); } // Touch了滑动时触发 public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX, float distanceY) { Log.i("MyGesture", "onScroll"); return super.onScroll(e1, e2, distanceX, distanceY); } /* * Touch了还没有滑动时触发 * (1)onDown只要Touch Down一定立刻触发 * (2)Touch Down后过一会没有滑动先触发onShowPress再触发onLongPress * So: Touch Down后一直不滑动，onDown -> onShowPress -> onLongPress这个顺序触发。 */ public void onShowPress(MotionEvent e) { Log.i("MyGesture", "onShowPress"); super.onShowPress(e); } /* * 两个函数都是在Touch Down后又没有滑动(onScroll)，又没有长按(onLongPress)，然后Touch Up时触发 * 点击一下非常快的(不滑动)Touch Up: onDown->onSingleTapUp->onSingleTapConfirmed * 点击一下稍微慢点的(不滑动)Touch Up: onDown->onShowPress->onSingleTapUp->onSingleTapConfirmed */ public boolean onSingleTapConfirmed(MotionEvent e) { Log.i("MyGesture", "onSingleTapConfirmed"); return super.onSingleTapConfirmed(e); } public boolean onSingleTapUp(MotionEvent e) { Log.i("MyGesture", "onSingleTapUp"); return super.onSingleTapUp(e); } }
} 就这样
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