android开发中为activity增加左右手势识别，如右滑关闭当前页面。

复制代码 代码如下:
/*
* for左右手势
* 1.复制下面的内容到目标Activity
* 2.目标Activity的onCreate()调用initGesture()
* 3.目标Activity需implements OnTouchListener, OnGestureListener
*/
private GestureDetector mGestureDetector;
private int verticalMinDistance = 180;
private int minVelocity = 0;

private void initGesture() {
mGestureDetector = new GestureDetector((OnGestureListener) this);
}

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

if (e1.getX() - e2.getX() > verticalMinDistance && Math.abs(velocityX) > minVelocity) {

// 切换Activity
// Intent intent = new Intent(ViewSnsActivity.this, UpdateStatusActivity.class);
// startActivity(intent);
//Toast.makeText(this, "向左手势", Toast.LENGTH_SHORT).show();
} else if (e2.getX() - e1.getX() > verticalMinDistance && Math.abs(velocityX) > minVelocity) {

// 切换Activity
// Intent intent = new Intent(ViewSnsActivity.this, UpdateStatusActivity.class);
// startActivity(intent);
//Toast.makeText(this, "向右手势", Toast.LENGTH_SHORT).show();
finish();
overridePendingTransition(R.anim.push_right_in, R.anim.push_right_out);
}

return false;
}

@Override
public void onLongPress(MotionEvent arg0) {
// TODO Auto-generated method stub

}

@Override
public boolean onScroll(MotionEvent arg0, MotionEvent arg1, float arg2,
float arg3) {
// TODO Auto-generated method stub
return false;
}

@Override
public void onShowPress(MotionEvent arg0) {
// TODO Auto-generated method stub

}

@Override
public boolean onSingleTapUp(MotionEvent arg0) {
// TODO Auto-generated method stub
return false;
}

@Override
public boolean onTouch(View v, MotionEvent event) {
// TODO Auto-generated method stub
return mGestureDetector.onTouchEvent(event);
}

@Override
public boolean onDown(MotionEvent arg0) {
// TODO Auto-generated method stub
return false;
}

@Override
public boolean dispatchTouchEvent(MotionEvent ev) {
mGestureDetector.onTouchEvent(ev);
return super.dispatchTouchEvent(ev);
}

push_right_in.xml

复制代码 代码如下:
<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">
<translate android:fromXDelta="-100%p" android:toXDelta="0"
android:duration="500" />
<alpha android:fromAlpha="0.1" android:toAlpha="1.0"
android:duration="500"/>
</set>

push_right_out.xml

复制代码 代码如下:
<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">
<translate android:fromXDelta="0" android:toXDelta="100%p"
android:duration="500" />
<alpha android:fromAlpha="1.0" android:toAlpha="0.1"
android:duration="500"/>
</set>