android处理单击双击和滑动事件

android有处理鼠标动作的GestureDetector，使用起来也挺方便，几个常用事件你都可以找到接口接入处理：

单击、双击（比如双击放大）、滑动（比如翻页）

下面是简化的例子，参考并整合所得，来源参考页尾参考内容：

package com.aslibra.test;

import android.app.Activity;

import android.graphics.Color;

import android.os.Bundle;

import android.util.Log;

import android.view.GestureDetector;

import android.view.MotionEvent;

import android.view.GestureDetector.OnGestureListener;

import android.widget.LinearLayout;

import android.widget.TextView;

public class touchGesture extends Activity implements OnGestureListener {

private LinearLayout main;

private TextView viewA;

private GestureDetector gestureScanner;

@Override

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

gestureScanner = new GestureDetector(this);

gestureScanner.setOnDoubleTapListener(new GestureDetector.OnDoubleTapListener(){

public boolean onDoubleTap(MotionEvent e) {

viewA.setText("-" + "onDoubleTap" + "-");

//双击时产生一次

Log.v("test", "onDoubleTap");

return false;

}

public boolean onDoubleTapEvent(MotionEvent e) {

//双击时产生两次

Log.v("test", "onDoubleTapEvent");

return false;

}

public boolean onSingleTapConfirmed(MotionEvent e) {

viewA.setText("-" + "onSingleTapConfirmed" + "-");

//短快的点击算一次单击

Log.v("test", "onSingleTapConfirmed");

return false;

}

});

main = new LinearLayout(this);

main.setBackgroundColor(Color.GRAY);

main.setLayoutParams(new LinearLayout.LayoutParams(320,480));

main.setOrientation(LinearLayout.VERTICAL);

viewA = new TextView(this);

viewA.setBackgroundColor(Color.YELLOW);

viewA.setTextColor(Color.BLACK);

viewA.setTextSize(16);

viewA.setLayoutParams(new LinearLayout.LayoutParams(320,50));

main.addView(viewA);

setContentView(main);

}

@Override

public boolean onTouchEvent(MotionEvent me) {

return gestureScanner.onTouchEvent(me);

}

@Override

public boolean onDown(MotionEvent e) {

//viewA.setText("-" + "DOWN" + "-");

return true;

}

@Override

public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) {

//viewA.setText("-" + "FLING" + "- "+velocityX + "- "+velocityY);

Log.v("test", "onFling "+e1.getX()+" "+e2.getX());

return true;

}

@Override

public void onLongPress(MotionEvent e) {

//viewA.setText("-" + "LONG PRESS" + "-");

}

@Override

public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX, float distanceY) {

//viewA.setText("-" + "SCROLL" + "- "+distanceX + "- "+distanceY);

Log.v("test", "onScroll "+e1.getX()+" "+e2.getX());

return true;

}

@Override

public void onShowPress(MotionEvent e) {

//viewA.setText("-" + "SHOW PRESS" + "-");

}

@Override

public boolean onSingleTapUp(MotionEvent e) {

Log.v("test", "onSingleTapUp");

//viewA.setText("-" + "SINGLE TAP UP" + "-"+ i++);

return true;

}

}