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
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<TextView android:id="@+id/gesture"android:layout_width="match_parent"android:layout_height="150dp"android:gravity="center"android:text="单击手势变化" /><TextView android:id="@+id/doubleTap"android:layout_width="match_parent"android:layout_height="150dp"android:gravity="center"android:text="双击手势变化" /> |
MainActivity.java
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public class MainActivity extends Activity{ private static final String LOG_TAG = "HelloGesture"; private GestureDetector mGestureDetector = null; private TextView mGestureTextView = null; private TextView mDoubleTapTextView = null; @Overrideprotected 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(){ @Overridepublic boolean onSingleTapUp(MotionEvent e) { Log.i(LOG_TAG, "onSingleTapUp: " + e.toString()); mGestureTextView.setText("onSingleTapUp: "); return false; } @Overridepublic void onShowPress(MotionEvent e) { Log.i(LOG_TAG, "onShowPress: " + e.toString()); mGestureTextView.setText("onShowPress: "); } @Overridepublic boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX, float distanceY){ Log.i(LOG_TAG, "onScroll: " + e1.toString() + ", " + e2.toString()); mGestureTextView.setText("onScroll "); return false; } @Overridepublic void onLongPress(MotionEvent e){ Log.i(LOG_TAG, "onLongPress: " + e.toString()); mGestureTextView.setText("onLongPress: "); } @Overridepublic boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) { Log.i(LOG_TAG, "onFling: " + e1.toString() + ", " + e2.toString()); mGestureTextView.setText("onFling "); return false; } @Overridepublic boolean onDown(MotionEvent e) { Log.i(LOG_TAG, "onDown: " + e.toString()); mGestureTextView.setText("onDown: "); return false; } }; private OnDoubleTapListener mDoubleTapListener = new OnDoubleTapListener() { @Overridepublic boolean onSingleTapConfirmed(MotionEvent e) { Log.i("LOG_TAG", "onSingleTapConfirmed: " + e.toString()); mDoubleTapTextView.setText("onSingleTapConfirmed: "); return false; } @Overridepublic boolean onDoubleTapEvent(MotionEvent e) { Log.i("LOG_TAG", "onDoubleTapEvent: " + e.toString()); mDoubleTapTextView.setText("onDoubleTapEvent: "); return false; } @Overridepublic 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
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public class MainActivity extends Activity { private GestureDetector mGestureDetector = null; private TextView mGestureTextView = null; private TextView mDoubleTapTextView = null; @Overrideprotected 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 } @Overridepublic 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"; @Overridepublic boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) { Log.d(DEBUG_TAG, "onFling: " + e1.toString() + ", " + e2.toString()); mGestureTextView.setText("onFling "); return false; } @Overridepublic boolean onDown(MotionEvent e){ Log.d(DEBUG_TAG, "onDown: " + e.toString()); mGestureTextView.setText("onDown: "); return false; } }} |
