android - 在android中从左向右和从右向左滑动

Question

我有 SwipeActivity。当我从右向左滑动时，我想进入 Activity B，当我从左向右滑动时，我想进入 Activity C。但是我的代码不起作用。请帮助我。

我的 SwipeActivity 是:

公共(public)类 SwipeActivity 扩展 Activity {

public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);

    final GestureDetector gestureDetector = new GestureDetector(new GestureListener());
    View mainview = (View) findViewById(R.id.mainView);

    // Set the touch listener for the main view to be our custom gesture listener
    mainview.setOnTouchListener(new View.OnTouchListener() {
        public boolean onTouch(View v, MotionEvent event) {
            if (gestureDetector.onTouchEvent(event)) {
                return true;
            }
            return false;
        }
    });
}

 private final class GestureListener extends SimpleOnGestureListener {

        private static final int SWIPE_THRESHOLD = 100;
        private static final int SWIPE_VELOCITY_THRESHOLD = 100;

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

        @Override
        public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) {
            boolean result = false;
            try {
                float diffY = e2.getY() - e1.getY();
                float diffX = e2.getX() - e1.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();
                        }
                    }
                } 

            } catch (Exception exception) {
                exception.printStackTrace();
            }
            return result;
        }
    }

    public void onSwipeRight() {
        Intent in = new Intent(SwipeActivity.this,page1Activity.class);
        startActivity(in);
    }

    public void onSwipeLeft() {
        Intent in = new Intent(SwipeActivity.this,page2Activity.class);
        startActivity(in);
    }

Answer 1

我认为您可以使用 fragment ，以及在 Activity 中包含 fragment 的 ViewPager。

检查这是示例:http://thepseudocoder.wordpress.com/2011/10/05/android-page-swiping-using-viewpager/

希望对你有用。