我想在 GridView 上实现滑动手势。 例如:我有 3*3 GridView 和 9 张图片，当我将手指滑动到图片时 我想删除滑动的图片 如果你有任何想法，有人可以帮助我。
谢谢
最佳答案
这就是例子，对我有用
public class GameActivity extends AppCompatActivity {
private GestureDetectorCompat detector;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_game);
detector = new GestureDetectorCompat(this, new MyGestureListener());
GridView board = (GridView) findViewById(R.id.board);
board.setOnTouchListener(new View.OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {
detector.onTouchEvent(event);
return false;
}
});
}
@Override
public boolean onTouchEvent(MotionEvent event) {
detector.onTouchEvent(event);
return super.onTouchEvent(event);
}
class MyGestureListener extends GestureDetector.SimpleOnGestureListener {
private static final int SWIPE_THRESHOLD = 100;
private static final int SWIPE_VELOCITY_THRESHOLD = 100;
@Override
public boolean onDown(MotionEvent event) {
return true;
}
@Override
public boolean onFling(MotionEvent event1, MotionEvent event2,
float velocityX, float velocityY) {
float diffY = event2.getY() - event1.getY();
float diffX = event2.getX() - event1.getX();
if (Math.abs(diffX) > Math.abs(diffY)) {
if (Math.abs(diffX) > SWIPE_THRESHOLD && Math.abs(velocityX) > SWIPE_VELOCITY_THRESHOLD) {
if (diffX > 0) {
onSwipeRight();
} else {
onSwipeLeft();
}
}
} else {
if (Math.abs(diffY) > SWIPE_THRESHOLD && Math.abs(velocityY) > SWIPE_VELOCITY_THRESHOLD) {
if (diffY > 0) {
onSwipeBottom();
} else {
onSwipeTop();
}
}
}
return true;
}
}
private void onSwipeLeft() {
}
private void onSwipeRight() {
}
private void onSwipeTop() {
}
private void onSwipeBottom() {
}
}
关于android - 在 GridView 上实现滑动手势，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/11327095/