Android - 滑动翻转卡片

1. 首先，在布局文件中创建一个卡片布局。

    //添加正面卡片的内容





    //添加反面卡片的内容

2.在 Activity 或 Fragment 中使用 GestureDetector 实现滑动翻转卡片。

private GestureDetectorCompat mDetector;

private final float MIN_X_DIST = 200;

@Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main);

final LinearLayout front = findViewById(R.id.card_front);
final LinearLayout back = findViewById(R.id.card_back);
mDetector = new GestureDetectorCompat(this, new MyGestureListener(front, back));

}

@Override public boolean onTouchEvent(MotionEvent event) { return mDetector.onTouchEvent(event); }

class MyGestureListener extends GestureDetector.SimpleOnGestureListener {

View front;
View back;

public MyGestureListener(View front, View back) {
    this.front = front;
    this.back = back;
}

@Override
public boolean onDown(MotionEvent e) {
    return true;
}

@Override
public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) {
    float distanceX = e2.getX() - e1.getX();
    float distanceY = e2.getY() - e1.getY();

    if (Math.abs(distanceX) > Math.abs(distanceY)
            && Math.abs(distanceX) > MIN_X_DIST) {

        if (distanceX > 0) {
            //从左向右滑动，显示反面
            flipCard(true);
        } else {
            //