android-touch-event

来源： https://stackoverflow.com/questions/59504422/motionlayout-problems-with-children-intercepting-touch-events

来源： https://stackoverflow.com/questions/59504422/motionlayout-problems-with-children-intercepting-touch-events

来源： https://stackoverflow.com/questions/59504422/motionlayout-problems-with-children-intercepting-touch-events

问题 I implemented the new ViewPager for my project. The viewPager2 contains a list of fragment private class ViewPagerAdapter extends FragmentStateAdapter { private ArrayList<Integer> classifiedIds; ViewPagerAdapter(@NonNull Fragment fragment, final ArrayList<Integer> classifiedIds) { super(fragment); this.classifiedIds = classifiedIds; } @NonNull @Override public Fragment createFragment(int position) { return DetailsFragment.newInstance(classifiedIds.get(position)); } @Override public int

问题 So I have a touch event and it handles ACTION_DOWN and ACTION_UP one by one. For example if I click on the left half of the screen ACTION_DOWN works but not ACTION_UP and same for the right side of the screen. i want to handle both of them simultaneously. If I click on left side and right side at the same time both the event should perform. Can anyone please help me on this. My code is @Override public boolean onTouchEvent(MotionEvent event) { switch (event.getAction()) { case MotionEvent

问题 I am very glad that Google released ViewPager2 which is built on RecyclerView to solve a lot of issues that the old ViewPager has. I quickly replaced my old ViewPager codes to ViewPager2: Replace ViewPager with ViewPager2 in xml Replace FragmentPagerAdapter(FragmentManager) with FragmentStateAdapter(Fragment) ViewPager setup is as below: viewPager.adapter = fragmentAdapter val mediator = TabLayoutMediator(tabLayout, viewPager, true) { tab, position -> tab.text = fragmentAdapter.tabNames

问题 How can i drag a custom view inside the SurfaceView. Touch events are not dispatched to child custom view from SurfaceView or child view's onTouchEvent is not called. 回答1: Try this code public class MoveViewTouchListener implements View.OnTouchListener { private GestureDetector mGestureDetector; private View mView; public MoveViewTouchListener(View view) { mGestureDetector = new GestureDetector(view.getContext(), mGestureListener); mView = view; } @Override public boolean onTouch(View v,

问题 How can i drag a custom view inside the SurfaceView. Touch events are not dispatched to child custom view from SurfaceView or child view's onTouchEvent is not called. 回答1: Try this code public class MoveViewTouchListener implements View.OnTouchListener { private GestureDetector mGestureDetector; private View mView; public MoveViewTouchListener(View view) { mGestureDetector = new GestureDetector(view.getContext(), mGestureListener); mView = view; } @Override public boolean onTouch(View v,

问题 I have an horizontal RecyclerView with leftPadding = 48dp , topPadding = 24dp and clipToPadding = false . It starts with an empty space on the left, but when the user scrolls the list its items are drawn on that (previously empty) space. The top space is always empty. This RecyclerView is inside a FrameLayout with foreground = selectableItemBackground . My problem comes from the fact that the RecyclerView consumes and ignores touches on the left and top spaces, meaning an OnClickListener won

问题 I'm working on a drawing app, where the user can pan & zoom to a specific portion of the screen and start drawing with zoom applied. To be more specific, I'm looking for a way to implement zoom, pinch & pan gesture in Canvas (horizontal and vertical scrolling with moveable x, y coordinates). Right now, I've successfully developed the zoom only feature but it's not accurate and the pan option is not working. See my sample code here, public class DrawingView extends View { //canvas private