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[操作系统]用户输入 i. 检测常用手势(一)


参考:

http://blog.csdn.net/qq418716640/article/details/8508973
http://www.cnblogs.com/mengdd/p/3335508.html

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.

<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

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 onSingleTapConfirmed(MotionEvent e) {
Log.i("LOG_TAG", "onSingleTapConfirmed: " + e.toString());
mDoubleTapTextView.setText("onSingleTapConfirmed: ");
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;

}
}

}