Android(安卓)左右滑动切换页面或Activity的效果实现

对于Android桌面可以用手势左右滑动进行切换。或者大家用过iReader的一定被其丰富的手势折服吧。现在看看自己的多个Activy之间如何切换呢

1、需要继承OnGestureListener和OnDoubleTapListener，如下：

Java代码左右滑动切换页面或Activity的效果实现" style="border:0px;list-style:none;" width="0" height="0"> 左右滑动切换页面或Activity的效果实现" style="border:0px;list-style:none;" width="0" height="0">

public class ViewSnsActivity extends Activity implements OnTouchListener, OnGestureListener

2、在添加mGestureDetector的定义，并在ViewSnsActivity的onCreate函数中加入其页面布局的setOnTouchListener事件

GestureDetector mGestureDetector;

public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.view_sns_activity);
mGestureDetector = new GestureDetector((OnGestureListener) this);
LinearLayout viewSnsLayout = (LinearLayout)findViewById(R.id.viewSnsLayout);
viewSnsLayout.setOnTouchListener(this);
viewSnsLayout.setLongClickable(true);
}

3、重载onFling函数

public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX,
float velocityY) {
if (e1.getX()-e2.getX() > snsConstant.getFlingMinDistance()
&& Math.abs(velocityX) > snsConstant.getFlingMinVelocity()) {
// 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() > snsConstant.getFlingMinDistance()
&& Math.abs(velocityX) > snsConstant.getFlingMinVelocity()) {
// 切换Activity
// Intent intent = new Intent(ViewSnsActivity.this, UpdateStatusActivity.class);
// startActivity(intent);
Toast.makeText(this, "向右手势", Toast.LENGTH_SHORT).show();
}
return false;
}

其中SnsConstant如下：

public class SnsConstant {
private static final int FLING_MIN_DISTANCE = 50;
private static final int FLING_MIN_VELOCITY = 0;
public static int getFlingMinDistance() {
return FLING_MIN_DISTANCE;
}
public static int getFlingMinVelocity() {
return FLING_MIN_VELOCITY;
}
}

4、重载onTouch函数

public boolean onTouch(View v, MotionEvent event) {
return mGestureDetector.onTouchEvent(event);
}

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