import android.os.Bundle;
import android.app.Activity;
import android.content.Context;
import android.util.Log;
import android.widget.RelativeLayout;
public class MainActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);//这里的xml是一个空白的layout
//需要监听左右滑动事件的view
RelativeLayout view = (RelativeLayout) this.findViewById(R.id.layout);
//setLongClickable是必须的
view.setLongClickable(true);
view.setOnTouchListener(new MyGestureListener(this));
}
/**
* 继承GestureListener,重写left和right方法
*/
private class MyGestureListener extends GestureListener {
public MyGestureListener(Context context) {
super(context);
}
@Override
public boolean left() {
Log.e("test", "向左滑");
return super.left();
}
@Override
public boolean right() {
Log.e("test", "向右滑");
return super.right();
}
}
}
import android.content.Context;
import android.view.GestureDetector.SimpleOnGestureListener;
import android.view.GestureDetector;
import android.view.View;
import android.view.View.OnTouchListener;
import android.view.MotionEvent;
/**
* 实现监听左右滑动的事件,哪个view需要的时候直接setOnTouchListener就可以用了
* @author LinZhiquan
*
*/
public class GestureListener extends SimpleOnGestureListener implements OnTouchListener {
/** 左右滑动的最短距离 */
private int distance = 100;
/** 左右滑动的最大速度 */
private int velocity = 200;
private GestureDetector gestureDetector;
public GestureListener(Context context) {
super();
gestureDetector = new GestureDetector(context, this);
}
/**
* 向左滑的时候调用的方法,子类应该重写
* @return
*/
public boolean left() {
return false;
}
/**
* 向右滑的时候调用的方法,子类应该重写
* @return
*/
public boolean right() {
return false;
}
@Override
public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX,
float velocityY) {
// TODO Auto-generated method stub
// e1:第1个ACTION_DOWN MotionEvent
// e2:最后一个ACTION_MOVE MotionEvent
// velocityX:X轴上的移动速度(像素/秒)
// velocityY:Y轴上的移动速度(像素/秒)
// 向左滑
if (e1.getX() - e2.getX() > distance
&& Math.abs(velocityX) > velocity) {
left();
}
// 向右滑
if (e2.getX() - e1.getX() > distance
&& Math.abs(velocityX) > velocity) {
right();
}
return false;
}
@Override
public boolean onTouch(View v, MotionEvent event) {
// TODO Auto-generated method stub
gestureDetector.onTouchEvent(event);
return false;
}
public int getDistance() {
return distance;
}
public void setDistance(int distance) {
this.distance = distance;
}
public int getVelocity() {
return velocity;
}
public void setVelocity(int velocity) {
this.velocity = velocity;
}
public GestureDetector getGestureDetector() {
return gestureDetector;
}
public void setGestureDetector(GestureDetector gestureDetector) {
this.gestureDetector = gestureDetector;
}
}
标题名称:安卓左右滑动事件监听
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