ViewFlipper

ViewFlipper

1.手勢註冊

在res文件夾下新建anim文件件，存放left_in.xml、left_out.xml、right_in.xml、right_out.xml四個文件。

left_in.xml文件內容：

<?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="600"
        />
    <alpha
        android:fromAlpha="0.1"
        android:toAlpha="1.0"
        android:duration="600"
        />

</set>

left_out.xml文件內容

<?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="600"
        />
    <alpha
        android:fromAlpha="1.0"
        android:toAlpha="0.1"
        android:duration="600"
        />

</set>

right_in.xml文件內容

<?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="600"
    />
<alpha
    android:fromAlpha="1.0"
    android:toAlpha="0.1"
    android:duration="600"
    />

</set>

right_out.xml文件內容

<?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="600"
        />
    <alpha
        android:fromAlpha="1.0"
        android:toAlpha="0.1"
        android:duration="600"
        />

</set>

 

activity要實現接口OnGestListener（import android.view.GestureDetector; importandroid.view.GestureDetector.OnGestureListener;）

2.實現接口OnGestListener

聲明對象

private ViewFlipper viewFlipper; //滑動播放圖片的控件
private GestureDetector detector; //手勢檢測器

Animation leftIn, leftOut, rightIn, rightOut; //四種反應方式

 

導入包

importandroid.view.GestureDetector;
import android.view.GestureDetector.OnGestureListener;

 

重寫方法

@Override
public boolean onTouchEvent(MotionEvent event) {

    return this.detector.onTouchEvent(event); //touch事件交給手勢處理。
}

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

@Override
public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX,
                       float velocityY) {
    Log.i(TAG, "e1="+e1.getX()+" e2="+e2.getX()+" e1-e2="+(e1.getX()-e2.getX()));

    if(e1.getX()-e2.getX()>120){
        viewFlipper.setInAnimation(leftInAnimation);
        viewFlipper.setOutAnimation(leftOutAnimation); //注意，和上面的setInAnimation不同
        viewFlipper.showNext();//向右滑動
        return true;
    }else if(e1.getX()-e2.getY()<-120){
        viewFlipper.setInAnimation(rightInAnimation);
        viewFlipper.setOutAnimation(rightOutAnimation);
        viewFlipper.showPrevious();//向左滑動
        return true;
    }
    return false;
}

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

}

@Override
public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX,
                        float distanceY) {
    // TODO Auto-generated method stub
    return false;
}

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

}

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