Question

我有抽屉布局，它工作正常。但我想在片段上右键滑动后打开导航抽屉。你能帮我解决这个问题。

这是我的倾听者。

public class OnSwipeTouchListener implements View.OnTouchListener {

    private final GestureDetector gestureDetector;

    public OnSwipeTouchListener(Context context) {
        gestureDetector = new GestureDetector(context, new GestureListener());
    }

    public void onSwipeLeft() {
    }

    public void onSwipeRight() {
    }

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

    private final class GestureListener extends GestureDetector.SimpleOnGestureListener {

        private static final int SWIPE_DISTANCE_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) {
            float distanceX = e2.getX() - e1.getX();
            float distanceY = e2.getY() - e1.getY();
            if (Math.abs(distanceX) > Math.abs(distanceY) && Math.abs(distanceX) > SWIPE_DISTANCE_THRESHOLD && Math.abs(velocityX) > SWIPE_VELOCITY_THRESHOLD) {
                if (distanceX > 0)
                    onSwipeRight();
                else
                    onSwipeLeft();
                return true;
            }
            return false;
        }
    }
}

片段

中的用法

public class ChartsFragment extends Fragment {

    public ChartsFragment(){}

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
            Bundle savedInstanceState) {

        View rootView = inflater.inflate(R.layout.fragment_charts, container, false);
        rootView.setOnTouchListener(new OnSwipeTouchListener(getActivity().getApplicationContext()){
            @Override
            public void onSwipeRight() {
                Log.v("SWIPE", "SWIPE");
            }
        });
        return rootView;
    }
}

但我不知道如何打开抽屉，因为它在另一个类（MainActivity）中

 mDrawerLayout.openDrawer(linearLayout);

感谢Pankaj Arora 的解决方案：

final DrawerLayout mDrawerLayout = (DrawerLayout)getActivity().findViewById(R.id.drawer_layout);
        rootView.setOnTouchListener(new OnSwipeTouchListener(getActivity().getApplicationContext()){
            @Override
            public void onSwipeRight() {
                mDrawerLayout.openDrawer(Gravity.START);
                Log.v("SWIPE", "SWIPE");
            }
        });

Answer 1

尝试在您的片段中获取抽屉布局的ID，如。

//全球

DrawerLayout mDrawerLayout

在oncreateview中

mDrawerLayout = getactivity().findviewbyid(R.id.your drawer layout id);

然后在onswipe右边调用

mDrawerLayout.openDrawer(Gravity.Start);

从片段右侧滑动打开抽屉布局

1 个答案: