Develop Reference

Set custom anchor when dragging a View

I am using Android Drag&Drop API and am trying to set the anchor of the drag shadow to the point where the touch was made in the View. The dafault behavior is to have the anchor the middle of the View.
I did some research and it seems this can be done by overriding the onProvideShadowMetrics (Point shadowSize, Point shadowTouchPoint) method in the DragShadowBuilder class. From what I understood, if I change the x,y coordinates of shadowTouchPoint it should modify the coordinates of the drag anchor.
What I did was to extend the DragShadowBuilder class like so:
class EventDragShadowBuilder extends DragShadowBuilder {
int touchPointXCoord, touchPointYCoord;
public EventDragShadowBuilder() {
super();
}
public EventDragShadowBuilder(View view, int touchPointXCoord,
int touchPointYCoord) {
super(view);
this.touchPointXCoord = touchPointXCoord;
this.touchPointYCoord = touchPointYCoord;
}
#Override
public void onProvideShadowMetrics(Point shadowSize,
Point shadowTouchPoint) {
shadowTouchPoint.set(touchPointXCoord, touchPointYCoord);
super.onProvideShadowMetrics(shadowSize, shadowTouchPoint);
}
}
In the Fragment where I use drag&drop I created two listeners to start a drag event for a View:
mEventLongClickListener = new OnLongClickListener() {
#Override
public boolean onLongClick(View view) {
EventDragShadowBuilder shadowBuilder = new EventDragShadowBuilder(
view, mEventTouchXCoord, mEventTouchYCoord);
view.startDrag(null, shadowBuilder, view, 0);
return true;
}
};
// We need this listener in order to get the corect coordinates for the
// drag shadow
mEventTouchListener = new OnTouchListener() {
#Override
public boolean onTouch(View view, MotionEvent event) {
final int action = event.getAction();
switch (action & MotionEvent.ACTION_MASK) {
case MotionEvent.ACTION_DOWN: {
mEventTouchXCoord = (int) event.getX();
mEventTouchYCoord = (int) event.getY();
break;
}
}
return false;
}
};
And I set the tow listeners:
itemView.setOnLongClickListener(mEventLongClickListener);
itemView.setOnTouchListener(mEventTouchListener);
Everything ok up to here. But when I test the app and start the drag process, the drag shadow is centered under the touch point. So it uses the default behavior. I tried debugging and I see that mEventTouchXCoord and mEventTouchYCoord are set correctly. The method shadowTouchPoint.set(touchPointXCoord, touchPointYCoord); gets the correct coordinates but still it centers the shadow.
I don't know what I'm doing wrong. Maybe I misunderstood the API. Any help with or hint would be much appreciated.

Ok, so like Scoup said the problem was in the onProvideShadowMetrics() method. The fact is, if I remove the super constructor, super.onProvideShadowMetrics(shadowSize, shadowTouchPoint);, it will not show the drag shadow anymore.
Taking a closer look at the API method this is what I found:
public void onProvideShadowMetrics(Point shadowSize, Point shadowTouchPoint) {
final View view = mView.get();
if (view != null) {
shadowSize.set(view.getWidth(), view.getHeight());
shadowTouchPoint.set(shadowSize.x / 2, shadowSize.y / 2);
} else {
Log.e(View.VIEW_LOG_TAG, "Asked for drag thumb metrics but no view");
}
}
So indeed, it resets the shadowTouchPoint to the middle of the dragged View. But it also initializes the drag shadow to the correct dimensions. While I want the drag shadow dimensions to be set correctly I don't want to reset shadowTouchPoint.
The easiest way to acheive this is to call the super constructor before initializing the shadowTouchPoint with the custom values, like so:
#Override
public void onProvideShadowMetrics(Point shadowSize,
Point shadowTouchPoint) {
super.onProvideShadowMetrics(shadowSize, shadowTouchPoint);
shadowTouchPoint.set(touchPointXCoord, touchPointYCoord);
}
Another solution is to deal with the drag shadow View yourself and skip the super constructor altogether. I will get back with a detailed update.

I guess the problem is this line super.onProvideShadowMetrics(shadowSize, shadowTouchPoint);
You already changed the value of shadowTouchPoint in shadowTouchPoint.set(touchPointXCoord, touchPointYCoord); but when call the super, you are passing the shadowTouchPoint that is replaced with the "super" default method, and the default behavior is center the shadowTouchPoint.
So, just remove this line.

How to handle touch outside the view in Android?

I've found implementation of "Undo Bar" used in Gmail application for Android. "UndoBar" is basically a View that is displayed on top of the layout.
Unfortunately it's not complete - it has no functionality of dismissing bar by touching screen outside the bar.
I've implemented FrameLayout that overrides onInterceptTouchEvent to handle bar dismissing but touching Action Bar does nothing.
Is there any way to handle such events from Action Bar?
Below there is an Image with "UndoBar"shown. What I want to achieve to handle touch in Action bar represented by red dot.

Try to override dispatchTouchEvent of your activity.
dispatchTouchEvent(MotionEvent event){
int x= event.getRawX();
int y= event.getRawY();
if(/*check bounds of your view*/){
// set your views visiblity to gone or what you want.
}
//for prevent consuming the event.
return super().dispatchTouchEvent(event);
}
update
dispatchTouchEvent(MotionEvent event){
int x= event.getRawX();
int y= event.getRawY();
return super().dispatchTouchEvent(event)||[YourView].onTouch(event);
}

To catch touch events for the whole screen including the ActionBar add a view to the Window.
View overlayView = new View(this);
WindowManager.LayoutParams p = new WindowManager.LayoutParams();
p.gravity = Gravity.TOP;
p.type = WindowManager.LayoutParams.TYPE_APPLICATION_PANEL;
p.token = overlayView.getWindowToken();
overlayView.setOnTouchListener(new OnTouchListener() {
public boolean onTouch(View view, MotionEvent event) {
// Get the action bar
int actionBarHeight = actionBar.getHeight();
if ((event.getAction() == MotionEvent.ACTION_DOWN)
&& (event.getRawY() < actionBarHeight)) {
// Touch inside the actionBar so let's consume it
// Do something
return true;
}
return false;
}
});
WindowManager mWindowManager = (WindowManager) getSystemService(Context.WINDOW_SERVICE);
mWindowManager.addView(overlayView, p);
Hope this helps.

You should just override Activity's dispatchTouchEvent(ev: MotionEvent) method
Look at this example of dismissing indefinite Snackbar
class MainActivity : AppCompatActivity() {
private var snackbar: Snackbar? = null
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_main)
setSupportActionBar(toolbar)
// show indefinite snackbar
snackbar = Snackbar.make(coordinator_layout, "Hello world!", Snackbar.LENGTH_INDEFINITE).apply {
show()
}
}
/**
* On each touch event:
* Check is [snackbar] present and displayed
* and dismiss it if user touched anywhere outside it's bounds
*/
override fun dispatchTouchEvent(ev: MotionEvent): Boolean {
// dismiss shown snackbar if user tapped anywhere outside snackbar
snackbar?.takeIf { it.isShown }?.run {
val touchPoint = Point(Math.round(ev.rawX), Math.round(ev.rawY))
if (!isPointInsideViewBounds(view, touchPoint)) {
dismiss()
snackbar = null // set snackbar to null to prevent this block being executed twice
}
}
// call super
return super.dispatchTouchEvent(ev)
}
/**
* Defines bounds of displayed view and check is it contains [Point]
* #param view View to define bounds
* #param point Point to check inside bounds
* #return `true` if view bounds contains point, `false` - otherwise
*/
private fun isPointInsideViewBounds(view: View, point: Point): Boolean = Rect().run {
// get view rectangle
view.getDrawingRect(this)
// apply offset
IntArray(2).also { locationOnScreen ->
view.getLocationOnScreen(locationOnScreen)
offset(locationOnScreen[0], locationOnScreen[1])
}
// check is rectangle contains point
contains(point.x, point.y)
}
}
Or check out the full gist

Have you tried an onTouchEvent on your FrameLayout..?
I haven't tried it but i think its makes sense to me that in case of MotionEvent on that layout ACTION_OUTSIDE action should get fired.
Try the following.
public boolean onTouchEvent(MotionEvent event)
{
if(event.getAction() == MotionEvent.ACTION_OUTSIDE){
undoBar.setVisibility(View.GONE);
}
return true;
}

There are 2 possible solutions.
As I mentioned in the comments you can either implement a scroll listener on your ListView and simple called hideUndoBar(true) on the slightest scroll.
OR
You can modify the UndoBarController. You'll notice that the undo bar is simply a View slap a OnFocusChange listener onto the View in the constructor and in the show method setFocus to the view.
In your OnFocusChange check to see if the view has lost focus and call hideUndoBar(true).
Update
I've created a Gist here https://gist.github.com/atgheb/5551961
showing how to change the UndoBarController to add the feature where it hides when it loses focus.
I haven't test it but I dont see why it won't work.

params = new WindowManager.LayoutParams(
WindowManager.LayoutParams.WRAP_CONTENT,
WindowManager.LayoutParams.WRAP_CONTENT,
WindowManager.LayoutParams.TYPE_PHONE,
WindowManager.LayoutParams.FLAG_NOT_TOUCH_MODAL|WindowManager.LayoutParams.FLAG_WATCH_OUTSIDE_TOUCH,
PixelFormat.TRANSPARENT);
what you actually need is :
WindowManager.LayoutParams.FLAG_NOT_TOUCH_MODAL|WindowManager.LayoutParams.FLAG_WATCH_OUTSIDE_TOUCH
Documentation says:
Window flag: if you have set FLAG_NOT_TOUCH_MODAL, you can set this
flag to receive a single special MotionEvent with the action
MotionEvent.ACTION_OUTSIDE for touches that occur outside of your
window.

I wasn't satisfied with any of the answers I found here. My solution is to attach a touch listener to the parent view like so:
((View)getParent()).setOnTouchListener((v, event) -> {
return true;
});

You can get all the touch events in your Activity by using the below code. I guess this code would get the touches from ActionBar as well.
public class MainActivity extends Activity {
...
// This example shows an Activity, but you would use the same approach if
// you were subclassing a View.
#Override
public boolean onTouchEvent(MotionEvent event){
int action = MotionEventCompat.getActionMasked(event);
switch(action) {
case (MotionEvent.ACTION_DOWN) :
Log.d(DEBUG_TAG,"Action was DOWN");
return true;
case (MotionEvent.ACTION_MOVE) :
Log.d(DEBUG_TAG,"Action was MOVE");
return true;
case (MotionEvent.ACTION_UP) :
Log.d(DEBUG_TAG,"Action was UP");
return true;
case (MotionEvent.ACTION_CANCEL) :
Log.d(DEBUG_TAG,"Action was CANCEL");
return true;
case (MotionEvent.ACTION_OUTSIDE) :
Log.d(DEBUG_TAG,"Movement occurred outside bounds " +
"of current screen element");
return true;
default :
return super.onTouchEvent(event);
}
}

Removing Fragment by clicking/touching outside:

I have some fragments that are added and removed from a RelativeLayout dynamically using code. one of the Fragments is a ListFragment, and as oppose to other my fragments that have a Close and Save Buttons this one contains only a list.
My goal is to close/remove this fragment by clicking outside of it on any place in the activity.
I have found the following code:
#Override
public boolean onTouchEvent(MotionEvent event) {
// I only care if the event is an UP action
if (event.getAction() == MotionEvent.ACTION_UP) {
// create a rect for storing the window rect
Rect r = new Rect(0, 0, 0, 0);
// retrieve the windows rect
this.getWindow().getDecorView().getHitRect(r);
// check if the event position is inside the window rect
boolean intersects = r.contains((int) event.getX(), (int) event.getY());
// if the event is not inside then we can close the activity
if (!intersects) {
// close the activity
this.finish();
// notify that we consumed this event
return true;
}
}
// let the system handle the event
return super.onTouchEvent(event);
}
That closes a not full-screen activity when clicking outside of it, but i just don't seem to understand how do I find my fragment rectangle.
Could some one assist and point me in the right direction? Any help would be appreciated.
Thanks.

Well I have finally figured this out:
#Override
public boolean onTouchEvent ( MotionEvent event )
{
// I only care if the event is an UP action
if ( event.getAction () == MotionEvent.ACTION_UP )
{
//and only is the ListFragment shown.
if (isListFragmentShown)
{
// create a rect for storing the fragment window rect
Rect r = new Rect ( 0, 0, 0, 0 );
// retrieve the fragment's windows rect
currentFragment.getView().getHitRect(r);
// check if the event position is inside the window rect
boolean intersects = r.contains ( (int) event.getX (), (int) event.getY () );
// if the event is not inside then we can close the fragment
if ( !intersects ) {
Log.d(TAG, "pressed outside the listFragment");
FragmentTransaction fragmentTransaction;
fragmentTransaction = fragmentManager.beginTransaction();
fragmentTransaction.remove(currentFragment).commit();
// notify that we consumed this event
return true;
}
}
}
//let the system handle the event
return super.onTouchEvent ( event );
}

You can add click listener to your container RelativeLayout. If fragment is up about action then activate your RelativeLayout's listener so listener only works while fragment exist.

How to dismiss the dialog with click on outside of the dialog?

I have implemented a custom dialog for my application. I want to implement that when the user clicks outside the dialog, the dialog will be dismissed.
What do I have to do for this?

You can use dialog.setCanceledOnTouchOutside(true); which will close the dialog if you touch outside of the dialog.
Something like,
Dialog dialog = new Dialog(context)
dialog.setCanceledOnTouchOutside(true);
Or if your Dialog in non-model then,
1 - Set the flag-FLAG_NOT_TOUCH_MODAL for your dialog's window attribute
Window window = this.getWindow();
window.setFlags(WindowManager.LayoutParams.FLAG_NOT_TOUCH_MODAL,
WindowManager.LayoutParams.FLAG_NOT_TOUCH_MODAL);
2 - Add another flag to windows properties,, FLAG_WATCH_OUTSIDE_TOUCH - this one is for dialog to receive touch event outside its visible region.
3 - Override onTouchEvent() of dialog and check for action type. if the action type is
'MotionEvent.ACTION_OUTSIDE' means, user is interacting outside the dialog region. So in this case, you can dimiss your dialog or decide what you wanted to perform.
view plainprint?
public boolean onTouchEvent(MotionEvent event)
{
if(event.getAction() == MotionEvent.ACTION_OUTSIDE){
System.out.println("TOuch outside the dialog ******************** ");
this.dismiss();
}
return false;
}
For more info look at How to dismiss a custom dialog based on touch points? and
How to dismiss your non-modal dialog, when touched outside dialog region

Simply use
dialog.setCanceledOnTouchOutside(true);

You can use this implementation of onTouchEvent. It prevent from reacting underneath activity to the touch event (as mentioned howettl).
#Override
public boolean onTouchEvent ( MotionEvent event ) {
// I only care if the event is an UP action
if ( event.getAction () == MotionEvent.ACTION_UP ) {
// create a rect for storing the window rect
Rect r = new Rect ( 0, 0, 0, 0 );
// retrieve the windows rect
this.getWindow ().getDecorView ().getHitRect ( r );
// check if the event position is inside the window rect
boolean intersects = r.contains ( (int) event.getX (), (int) event.getY () );
// if the event is not inside then we can close the activity
if ( !intersects ) {
// close the activity
this.finish ();
// notify that we consumed this event
return true;
}
}
// let the system handle the event
return super.onTouchEvent ( event );
}
Source: http://blog.twimager.com/2010/08/closing-activity-by-touching-outside.html

Or, if you're customizing the dialog using a theme defined in your style xml, put this line in your theme:
<item name="android:windowCloseOnTouchOutside">true</item>

This method should completely avoid activities below the grey area retrieving click events.
Remove this line if you have it:
window.setFlags(WindowManager.LayoutParams.FLAG_NOT_TOUCH_MODAL, WindowManager.LayoutParams.FLAG_NOT_TOUCH_MODAL);
Put this on your activity created
getWindow().setFlags(LayoutParams.FLAG_WATCH_OUTSIDE_TOUCH, LayoutParams.FLAG_WATCH_OUTSIDE_TOUCH);
then override the touch event with this
#Override
public boolean onTouchEvent(MotionEvent ev)
{
if(MotionEvent.ACTION_DOWN == ev.getAction())
{
Rect dialogBounds = new Rect();
getWindow().getDecorView().getHitRect(dialogBounds);
if (!dialogBounds.contains((int) ev.getX(), (int) ev.getY())) {
// You have clicked the grey area
displayYourDialog();
return false; // stop activity closing
}
}
// Touch events inside are fine.
return super.onTouchEvent(ev);
}

dialog.setCanceledOnTouchOutside(true);
to close dialog on touch outside.
And if you don't want to close on touch outside, use the code below:
dialog.setCanceledOnTouchOutside(false);

You can try this :-
AlterDialog alterdialog;
alertDialog.setCanceledOnTouchOutside(true);
or
alertDialog.setCancelable(true);
And if you have a AlterDialog.Builder Then you can try this:-
alertDialogBuilder.setCancelable(true);

This code is use for when use click on dialogbox that time hidesoftinput and when user click outer side of dialogbox that time both softinput and dialogbox are close.
dialog = new Dialog(act) {
#Override
public boolean onTouchEvent(MotionEvent event) {
// Tap anywhere to close dialog.
Rect dialogBounds = new Rect();
getWindow().getDecorView().getHitRect(dialogBounds);
if (!dialogBounds.contains((int) event.getX(),
(int) event.getY())) {
// You have clicked the grey area
InputMethodManager inputMethodManager = (InputMethodManager) act
.getSystemService(act.INPUT_METHOD_SERVICE);
inputMethodManager.hideSoftInputFromWindow(dialog
.getCurrentFocus().getWindowToken(), 0);
dialog.dismiss();
// stop activity closing
} else {
InputMethodManager inputMethodManager = (InputMethodManager) act
.getSystemService(act.INPUT_METHOD_SERVICE);
inputMethodManager.hideSoftInputFromWindow(dialog
.getCurrentFocus().getWindowToken(), 0);
}
return true;
}
};

Another solution, this code was taken from android source code of Window
You should just add these Two methods to your dialog source code.
#Override
public boolean onTouchEvent(MotionEvent event) {
if (isShowing() && (event.getAction() == MotionEvent.ACTION_DOWN
&& isOutOfBounds(getContext(), event) && getWindow().peekDecorView() != null)) {
hide();
}
return false;
}
private boolean isOutOfBounds(Context context, MotionEvent event) {
final int x = (int) event.getX();
final int y = (int) event.getY();
final int slop = ViewConfiguration.get(context).getScaledWindowTouchSlop();
final View decorView = getWindow().getDecorView();
return (x < -slop) || (y < -slop)
|| (x > (decorView.getWidth()+slop))
|| (y > (decorView.getHeight()+slop));
}
This solution doesnt have this problem :
This works great except that the activity underneath also reacts to the touch event. Is there some way to prevent this? – howettl

Following has worked for me:
myDialog.setCanceledOnTouchOutside(true);

Call dialog.setCancelable(false); from your activity/fragment.

You can make a background occupying all the screen size transparent and listen to the onClick event to dismiss it.

I tried some answers still I faced a problem like when I press outside the dialog dialog was hiding but a dimmed view was showing, and pressing again would go to the parent activity. But actually I wanted to go the parent activity after first click.
So what I did was
dialog.setOnCancelListener(this);
and changed my activity to implement DialogInterface.OnCancelListener with
#Override
public void onCancel(DialogInterface dialog) {
finish();
}
And boom, it worked.

Here is the code
dialog.getWindow().getDecorView().setOnTouchListener(new View.OnTouchListener() {
#Override
public boolean onTouch(View v, MotionEvent ev) {
if(MotionEvent.ACTION_DOWN == ev.getAction())
{
Rect dialogBounds = new Rect();
dialog. getWindow().getDecorView().getHitRect(dialogBounds);
if (!dialogBounds.contains((int) ev.getX(), (int) ev.getY())) {
// You have clicked the grey area
UiUtils.hideKeyboard2(getActivity());
return false; // stop activity closing
}
}
getActivity().dispatchTouchEvent(ev);
return false;
}
});
Try this one . you can hide the keyboard when you touch outside

Is it possible to pass an onTouchEvent to multiple views in Android?

I have read a few questions regarding this topic on SO but haven't really found a solid answer to it.
I have a framelayout that I stack multiple custom views on, however the onTouch event only works with the top view. (the custom views are all the same view with the same onTouch event, just multiple of them)
FrameLayout
customView[2] <--- this is the last view added and the only one that receives the event
customView[1]
customView[0]
I'm testing it on Android 2.2 and am wondering if there is any way for the other views below to know where the touch happened?
EDIT (Adding some code)
I'm adding some code to hopefully help explain where I'm running into issues. At first I just automatically had the onTouchEvent return true. This made it so that the last view (in my case customerView[2]) would be the only one generating a value.
However, once I added the method to set the onTouchEvent to return true or false, now the only view returning a generated value is customView[0].
I hope this clears up what I am asking. I'm rather new to this and I appreciate you taking the time to explain it (and of course I appreciate your patience).
Also, I realize that my TextView's don't update with the value on each touchEvent, I'm working on fixing that.
My Activity:
public class MyActivity extend Activity {
CustomView[] customView;
TextView[] textView;
int numViews 3;
//FrameLayout and Params created
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
for(int i = 0; i < numViews; i++) {
customView[i] = new CustomView(this, i);
//Allows the onTouch to be handled by all Views - View[0] is the bottom view
if(i == 0) {
customView[i].setTouchBool(true); //set view's onTouch to return true
} else {
customView[i].setTouchBool(false); //set view's onTouch to return false
}
//Set TextView to display the number generated by the CustomView
textView[i].setText(Double.toString(customView[i].getGeneratedNumber()));
//Add views to main layout
frame.addView(textView[i]);
frame.addView(customView[i]);
}
}
}
My View:
public class CustomView extends View {
boolean onTouchHandler = true;
int xVal = 0, yVal = 0;
int index;
double generatedNum = 0;
public CustomView(Context context) {
this(context, 0);
this.index = 0;
}
public CustomView(Context context, int index) {
super(context);
this.index = index;
}
#Override
public boolean onTouchEvent(MotionEvent ev) {
final int action = ev.getAction();
switch(action) {
case MotionEvent.ACTION_DOWN: {
//do logic
}
case MotionEvent.ACTION_MOVE: {
//do logic
}
case MotionEvent.ACTION_UP: {
xVal = (int) ev.getX();
yVal = (int) ev.getY();
generateNumber(xVal, yVal, index);
break;
}
}
return onTouchHandler;
}
private void generateNumber(int x, int y, int index) {
if(index == 0) {
generatedNum = (x / 2) * (y / 2) + 64;
} else {
generatedNum = (x / 2) * (y / 2) + (index * 128);
}
}
public double getGeneratedNumber() {
return generatedNum;
}
public boolean setTouchBool(boolean b) {
this.onTouchHandler = b;
}
}

Android will cascade down the views calling onTouchEvent on each one until it receives a true from one of them. If you want a touch event to be handled by all of them, then return false until it reaches the last one.
EDIT:
Ok. If I understand correctly, you have a single top view containing a bunch of child views one layer deep. My original answer was assuming that you had three custom views that were on top of each other in the ViewGroup's hierarchy (View3 is a child of View2. View2 is a child of View1. View1 is a child of ParentView). You want the user's touch event on the parent view to get sent to all of it's children.
If that's the case, AFAIK, there is no view in Android's API that allows that. So, you'll have to make a custom view that does it.
OK, I haven't tested this, so please tell me if it works and if it's what you're trying. Create a custom class that extends whatever object frame is, then override the onTouch method like so.
#Override
public boolean onTouchEvent(MotionEvent ev) {
for(int i = 0; i < this.getChildCount(); i++){
this.getChildAt(i).dispatchTouchEvent(ev);
}
return true;
}
Now, keep the same logic that your custom views have, except they should all return false because your parent view will not receive the onTouch event unless they do as stated in my previous answer
note: with this implementation, the child view that the user actually touches will fire twice because the logic will go
fire child touch event -> return false -> fire parent touch event -> fire child touch event again

I know this question is very old, but I had the same problem and solved it by creating my own Layout to determine which child is actually touched.
I therefore iterate over the children of my custom layout and check if the user actually clicked on the view. The collision detection is handled in the custom view's onTouch() method. (Collision detection is done by intersecting a Region() with the event's x,y coordinates. For me this was convennient because I drew the custom view with a Path())
Here is a kotlin code snippet from my custom layout for better understanding:
class CustomLayout(context: Context, attrs: AttributeSet) :
RelativeLayout(context, attrs){
override fun dispatchTouchEvent(ev: MotionEvent): Boolean {
if(ev.action != MotionEvent.ACTION_UP){
return true
}
//Iterate over child view and search for the right child that should handle this touch event
for (i in childCount - 1 downTo 0) {
val child = getChildAt(i)
if (!viewTouched(child, ev)) {
continue
}
//Do something
Timber.d("Touched view: ${child.id}")
}
return true
}
private fun viewTouched(child: View, ev: MotionEvent) : Boolean {
child as OnTouchListener
//onTouch() does the collision detection
return child.onTouch(child, ev)
}