Set ontouchevent android

Set ontouchevent android. I want to set the onTouchEvent for the view that covers the entire screen space of the activity. import android. In This example, all you need to do is add this line:. GestureDetector. The service works fine, and the View is shown on the screen, but I cannot get the View or the LinearLayout to receive any touch events (I just want either one of them to receive touch events, I don't care which). OnGestureListener consumed the event, else false. d(TAG,""+event. map is scrolling), I need to get "true". You can use the same method to add a gesture detector to any type of view. sound2); SoundButton2. 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]. java. setOnTouchListener(this); gestureDetector = new GestureDetector(this, this); } I am trying to place a marker on a map overlay and then present a dialog when the user selects the drawable. The chapter entitled An Android Event Handling Tutorial began exploring event handling within the narrow context of a single-touch event. I have read the documentation of the When onFling() calls postInvalidateOnAnimation(), it triggers computeScroll() to update the values for x and y. I want to create my custom EditText by extending my class to EditText. . setOnTouchListener(handleTouch); Notes. Samples Try Quick Guidesᵇᵉᵗᵃ User interfaces Permissions Background work Data and files All core areas ⤵️ I read lot about dispatchTouch event onTouchEvent, setOntouchListener. After a lot of trials the switch touch listener fires also, but i want to disable the event of I am creating a android application. onCreate(savedInstanceState); Between the onTouchEvent method and the OnTouchListener, the listener takes precedence: if there is a listener set and it returns false (or if there’s no listener at all), the onTouchEvent @Smashing: I know how intercept touch events to WebView, but I need to know whether the WebView consumed them. Android onTouch event. Share Improve this answer But i struggle to get the Draging to work. The tutorial has declared theonTouchEvent(MotionEvent me) outside the onCreate method. onTouchEvent(event){ case touch_down: get START text position case drag get END text position set selection range from START to END } I've found out all about getSelectStart() and various methods to setting a range and such, but I cannot find how to get the text position based on a touch event getX() and getY(). In nestedScrollView i have child linearlayout and this layout contains lot of child views like button and edittext. I want to override some touchevents of my custom EditText. The Android view system framework is a big topic to explain how internally Hi I have implemented a Fragment, and I want to detect touch event on my fragment. 上一章节中我们学习了 基于回调 的事件处理机制，本章节我们用一个范例来巩固下知识，顺便学习下 onTouchEvent(). 12 Answers. Create some util file, for example UiUtils. GestureDetector; import android. If on intercepting if we return true then the touch event is not passed to its children and if we pass false , the Android eco-system gets notified that the ViewGroup Should you want to detect the direction change of the swipe there is a simple way: private GestureDetector gestureDetector; @Override protected void onCreate(Bundle savedInstanceState) { findViewById(R. I also some drawing codes in ImageTable and they work properly, everything is drawn in SurfaceView test onClickListener is used whenever a click event for any view is raised, say for example: click event for Button, ImageButton. You have a couple of options: Create a basic class for Activities, for example BaseActivity and override onTouchEvent method there. This method is defined in the View class and can be overridden in your custom views or activity to respond to different touch events. ByteWelder. Drawing bitmap/Image on canvas, where the user touches on screen. MotionEvent; private MusicController controller; @Override public boolean onTouchEvent(MotionEvent event) { //the MediaController will hide after 3 seconds - tap the screen to make it appear again controller. Android Studio, Java. In addition to his answer, for doing the same on classes like android. { } public boolean onTouch(View v, MotionEvent event) { return gestureDetector. demo; import android. In order to handle touch input you need to check Input. Hot Network Questions Identify public class CustomSurfaceView extends SurfaceView {@Override public boolean onTouchEvent (MotionEvent ev) {super. The onTouchEvent() will set the new X and Y coordin But more importantly for the original question, if you do subclass WebView, in your onTouchEvent you will pass the event on to original class by calling base. final GestureDetector gestureDetector = (new GestureDetector(new GestureDetector. I want to add a fragment on top in order to listen the OnTouchEvents (gestures), but ignore the onclick events and pass the onclick events to the You can set an OnClickListener for pretty much any view not just buttons, for your case the code would be: YourTextView. Let me know if it works for you! This is also a good tutorial. Returns: true if the GestureDetector. FloatingActionButton; import android. If you want to set different graphics for when the Images are touched you can use StateListDrawables and set the ImageView source to the xml file which describes which image to show in which states. I think I should relate SurfaceView test with ImageTable but I don't know how to do. demo; import There are very few phones that do not have a touchscreen. Builder builder = new AlertDialog. e pinch open or pinch close), however, there are multiple fingers involved and a non-zero pointer index may be included when calling getAction(). view What is the name of this military coup comedy set in a Latin At first I just automatically had the onTouchEvent return true. How onTouchEvent() Works in Android. setOnTouchListener. The specific properties required for each event type are described in the AccessibilityEvent reference documentation. Samples Try Quick Guidesᵇᵉᵗᵃ User interfaces Permissions Background work Data and files I want to create my custom EditText by extending my class to EditText. How does it work then? After writing the code as mentioned in the tutorial, the program is not working as intended. public boolean onTouchEvent(MotionEvent event) { int eventAction = Then set a touch listener to it: parentView. All of us have already deal with android touch events with or without success! Everything begins with a simple OnTouchListener corresponds to onTouchEvent(), and is called in dispatchTouchEvent() right before onTouchEvent(). Most of this info is found here, but below is code in a form that I've used in an actual project that works. Button click listener. I was hoping to detect long click on a view and them start moving it using the onTouchEvent MOVE action. How to use OnTouchEvent Correctly? 1. Applies to Your Canvas is null. After a lot of trials the switch touch listener fires also, but i want to disable the event of So, for example, if you want the center of an image where you clicked, you need to add an offset equal to half the height and half the width. onTouchEvent public boolean onTouchEvent(android. Something like registering ACTION_DOWN and seeing how long it is before ACTION_UP. It seems to work nicely (with working click functionality) and isn't dependent on the FAB's parent layout or positioning package com. Here are some of the most common approaches: Using the OnClickListener interface: This is the most common way to handle click events in Android. onTouchEvent(android. I used the same switch case as described here. onInterceptTouchEvent, onTouchEvent only see ACTION_DOWN. Improve To achieve this, you have to add a click to its direct parent. setOnClickListener(new Button. kt and define method of hiding keyboard there, e. app. But the program has not called it anywhere. I am creating a android application. Set onTouchListener on the view you want to receive the touch event. e. onTouchevent() problem android. and it's related video's. For example, if the user is dragging finger and some content in the WebView is using it (e. android:shouldDisableView="True" for the view you want disable touch events. MediaPlayerControl; import android. 8. onTouchEvent(event); } private final class GestureListener extends i'm building a simple recyclerview with custom layout (Text view and switch) and a custom adapter. In Android, there are several ways to handle click and touch events. Maybe another Method is better to Dynamic add bitmap and move them. OnLongClickListener(){ @Override public boolean onLongClick(View v) { // TODO Auto To support multiple touch pointers, you can cache all active pointers with their IDs at their individual ACTION_POINTER_DOWN and ACTION_DOWN event time. Receiving onTouch and onClick events with Android. Samples Try Quick Guidesᵇᵉᵗᵃ User interfaces Permissions Background work Data and files However, at that time the decor will not be set (this is set // in this method), so no action will be taken. Samples Try Quick Guidesᵇᵉᵗᵃ User interfaces Permissions Background work Data and files How do we intercept touch events? First when we perform a touch action, Then ViewGroup gets the touch event, and then it is intercepted in the ViewGroup itself using onInterceptTouchEvent() . Try this, It may help you. What I've done is first imported android. Most views pass the scroller object's x and y position directly to scrollTo(). R. Note that each Touch has an an ID that will be unique per finger and consistent across frames. To phrase that another way, if you return false from onTouch() during the start of a gesture (the Note that getAction() normally includes information about both the action as well as the pointer index. Ontouch functionality. Builder(context) . If the user needs to enter text into an app, this is the primary way for them to do that. touch the Button --> onTouchEvent() not be called. Set the listener in onCreate (for an Activity) or onCreateView (for a Fragment). FrameLayout; /** * A FrameLayout that allow setting a delegate for intercept touch event */ public class InterceptTouchFrameLayout extends FrameLayout { private Custom view ImageView has setOnTouchListener called on it but does not override performClick If a View that overrides onTouchEvent or uses an OnTouchListener does not also implement performClick and call it when clicks 1. Is there a way to detect touch down, touch When setting two onTouchListeners on the same view, only one of the listeners were being called public boolean onTouch(View v, MotionEvent event) { return gestureDetector. support. Bundle; import android. Several of these are listed below. I have a fragment that draws a bitmap for me and I want this fragment to be full screen when touching The fragment has an image view that sets it to the bitmap I tried setting OnTouchListener inside the fragment for the view but I do What I've done is first imported android. I first tried using a RelativeLayout with an onTouchListener, but never managed to make it "connect" with the listener (i. There are so many methods and interfaces, with names that at first don’t seem very clear or distinct from How would I use the OnTouchEvent function to make an ImageView move to the right or left when the user touches the right or left of the screen? The following code is what I Motion events describe movements in terms of an action code and a set of axis values. Override method within View. Menu; import Seems like you have reference problem. In multiple touch events (i. Share I want to capture the onClick event when the user selects a spinner value. e("test", "Long press detected"); } })); public boolean onTouchEvent(MotionEvent event) { Detecting gestures on Android via GestureDetector Android 25. touchCount and then query each touch with Input. In your overriden onTouchEvent method inside the fragment return false, it passes the touch event to the lower layer views. android:isScrollContainer: Set this if the view will serve as a scrolling container, meaning that it can be resized to shrink its overall window so that there will be Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company I am answering my own question but note that I'm just putting together the solutions given by others (ReubenScratton and lazeR) so that if someone else is having the same problem he'll find the whole solution. You have to use the array of image from your database and set that on the basis of Touchlike. Fomrs v2. In Android, the app screen is a layout that can be used to display various UI elements like TextView, Button, ImageView, etc. GetTouch. NullReferenceException: Object reference not set to an instance of an object. Follow answered Mar 24, 2011 at 11:50. I hope this clears up what I If I set an OnTouchListener in the activity using this, I get the full range of touch events, but onTouchEvent doesn't. Logic handling the click actions should ideally be placed in There is an another option you can put an image in AlertDialog without creating an xml file. Syntax of onTouchEvent(): @Override public boolean onTouchEvent(MotionEvent event) { // Handle the touch event Based on this answer for another SO question this is the code I have created. In simple words, each bit on any app screen defines a coordinate that can be used to track UI elements as well as user touch on What is the difference between a view's onTouchEvent: public class MyCustomView extends View { // THIS : @Override public boolean onTouchEvent(MotionEvent event) { return super. But i found that onTOuchEvent method is called multiple times. You didn't register your custom Overlay class mapOverlay (btw. getAction()); return super. First I've made an anonymous class in my Activity (this can be Populate accessibility events. This document describes how to use touch gestures to drag and scale on-screen objects, using onTouchEvent() to intercept touch events. Everything works fine until I add the DrawerLayout to the app (like it's described in Creating a Navigation Drawer). :. Build AI-powered Android apps with Gemini APIs and more. (Thanks to @petrumo) public class MyNestedScrollView extends NestedScrollView { private boolean topZone = false; public onTouchEvent(MotionEvent) Called when a touch screen motion event occurs. The problem is that if I longclick and then drag my finger, the OnTouchEvent does not get called. How do you My Questions: To use the onTouchEvent(MotionEvent me) function do I need to import any class?. Is there a way to detect touch down, touch When setting two onTouchListeners on the same view, only one of the listeners were being called. Here is a good tutorial with code. If you return false than the touch event will be passed to the next View further up in the view hierarchy and you will receive no follow System. SimpleOnGestureListener; import android. setOnTouchListener(new OnTouchListener(){ public boolean onTouch(View arg0, MotionEvent arg1){ return false; } ); or. img. In onTouchEvent, ACTION_UP doesn't work. Can you please suggest me why this is happening – Here is a good tutorial with code. or set android:clickable="false" and android:focusable="false" to its direct parent to pass listener to further parent. show(); return false; }. How to use OnTouchEvent Correctly? 0. OnGestureListener() { @Override public boolean onDown(MotionEvent p1) { // TODO: Implement this method return false; } I created a service that displays a custom View inside a custom LinearLayout. Parts 1 and 2 take a deep dive into touch functions (onDispatchTouchEvent(), onInterceptTouchEvent(), onTouchEvent()) and how touch events flow through the view hierarchy. How do I register the activity as the ontouchEvent listener to the main content view. from official doc, definition for both are: import android. AlertDialog. onTouchEvent(event) whenever you don't handle the event yourself. ImageView class or android. onTouchEvent() の戻り値に注意. How to catch the OnTouchEvent just in a particular situation? 0. Do this by creating an instance of the class and adding it to the overlays collection of you MapView. "Removing" your problematic touch stuff simply means you set some flag that you test to decide whether to use your custom code. 0. We will add the gesture detector to the green View. Build; import android. class names start always with an uppercase letter in Java) to the MapView. Implement the onTouch(view,event) method. When view is focused with blue box in talkback mode, getX() and getRawX() of onTouchEvent is always the center point of the view. If you are doing this just to change the look of a button there are other ways to handle this in button But the button click does not appear to be registered. 217. It looks like the onTouchEvent method is getting called correctly, but you have to "print" the x and y coordinates differently so that you actually see the output. 16. println() will not work the way you expect it to in an Android app (there is no console to print to, per se). An activity with Without a true from onTouchEvent, the parent view will assume your view does not need the MotionEvents. public class MyLayout extends LinearLayout { I don't think your solution will actually solve them problem presented by the warning. Identify this set: sealed bag with azure, dark blue, and white parts I have an application that have multiple fragments . The following implementation of computeScroll() takes a different Now,I want to set onTouchEvent to Multiple bitmap move or drag. This is Part 3 of my Android Touch System series. Example : The Custom View Class: public class Build AI-powered Android apps with Gemini APIs and more. This is the general listener that receives all touch events and allows you to do your own processing on If you are creating a custom view, you can override onTouchEvent(), as described earlier. widget. I want to call this method on the basis of a boolean variable I am new in android so I don't know exactly this is Photo by Ilyuza Mingazova on Unsplash. Parameters: event - The current motion event. OnClickListener() Android onTouchEvent in a view class. But still my method gets called multiple times. from official doc, definition for both are: Add a comment | 3 Answers Sorted by: Reset to default 7 do not return false from ontouchevent in android. This made it so that the last view (in my case customerView[2]) would be the only one generating a value. dispatchTouchEvent() View. 3. MotionEvent). When onTouch() method returns true, Android will consider the event has been consumed and will not pass it on to the other various touch handlers (I think it includes the onClickListener). id. Between the onTouchEvent method and the OnTouchListener, the listener takes precedence: if there is a listener set and it returns false (or if there’s no listener at all), the onTouchEvent Following the @Andrew approach, if you want to move the view from its center, you only have to substract the view's half height and half width to the movement. Trigger a View's onTouchEvent via Code in Android. setOnTouchListener(new OnTouchListener() { @Override public boolean onTouch(View v, MotionEvent event) { return true; } }); view2. android canvas ontouchevent doesn't work. How to add long click listener to multitouch gesture detection library. All absolute placement that I've ever used works like this. Improve this answer. view1. Detect gestures. Get started Core areas; Get the samples and docs for the features you need. A typical gesture begins at the point that the screen is first touched and ends when the last finger or pointing device leaves the display surface. Here are the steps for doing this: 1. When enabled, the framework will discard touches that are received whenever the view's window is obscured by another visible ImageView class is used to display any kind of image resource in the android application either it can be android. because Button consume the event, like your webview. They will be negative when moving above or to the left of your view. Which is okay. 1 API 7 app. textView) This is because you have set the content view to be a single instance of your class MyView (class names should start with uppercase) Android - onTouchEvent only working first time. Moving imageview with touch event. In my Activity, I add the onTouchEvent() callback to handle screen touch event: public class MyActivity extends Activity{ @Override public b To support multiple touch pointers, you can cache all active pointers with their IDs at their individual ACTION_POINTER_DOWN and ACTION_DOWN event time. 7. Commented Oct 10, 2014 at 10:10. In your class definition: public class main_activity extends Activity { //variable for counting two successive up-down events int clickCount = 0; //variable for storing the time of first click long startTime; //variable for calculating the total time long duration; //constant for defining the time duration between the click that can be considered as double-tap static final int I'm creating Android app with MapView. onTouchEvent(ev); } } Share Improve this answer Take a look at Handling UI Events on the android docs, you specifically want onTouch if you want to listen to down and release. g. It works well in Activity, but it's not working on fragments. The problem is the events seem to overlap. onTouchEvent() の戻り値で false が返された場合は、MotionEvent. I have read the documentation of the I have a screen filled with buttons, but want the onTouch-method to use the entire screen's coordinates. Drawable (it is a general abstraction for anything that can be drawn in Android). OnClickListener(){ @Override public void onClick(View v) { // TODO Auto-generated method stub } }); btnAdd. I have read the documentation of the this is my code public class Main extends Activity { @Override public void onCreate(Bundle savedInstanceState) { super. onTouchEvent() の結果を return するようにすれば大丈夫ですが、SurfaceView などのサブクラスでは、明示的に return true; としないと罠にハマります。 I had the same problem when adding an overflow button to my RecyclerView's rows. tv=(TextView) ((Activity)getContext()). Each AccessibilityEvent has a set of required properties that describe the current state of the view. setOnTouchListener() it works. When none of the children of a ViewGroup return true in onTouchEvent, onInterceptTouchEvent will ONLY The problem is the order of operations for how Android handles touch events. ImageView inherits the android. Unfortunately, you can only set one touchListener on the View (it's a setOnTouchListener, not an addOnTouchListener) The current conclusion is that you can't do both at the same time. EDIT. I try to handle some actions in onTouchEvent using dispatchTouchEvent. The action code specifies the state change that occurred such as a pointer going down The onInterceptTouchEvent() method is called whenever a touch event is detected on the surface of a ViewGroup, including on the surface of its children. Consume only two finger touch. When clicking on image i keep getting this exception. Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company I have a view v2 that extends another view v1. Android has a number of default gestures that are automatically detected in the GestureDector class. To set up your layout with ViewPager, add the <ViewPager> element to your XML layout. 06. Android onTouchEvent Part 1, Part 2, and Part 3 (YouTube video - good summary of some of the links below) Mastering the Android Touch System (thorough video by Google developer) Android UI Internal : Pipeline of View's Touch I was using onTouchEvent with my webview and it seemed that as my WV got more complex the onTouchEvent method became less and less stable. Handling onTouchListener in Android Kotlin: Overriding performClick() Android provides a powerful event handling mechanism through the use of listeners. – greekygyro. // Please note that this listener only applies to the surface it is placed in // (in this case, CustomSurfaceView), which means that anything else Your Canvas is null. This is what I have: MyLayout. In xml, set android:clickable="false" to all descendants of the ViewGroup in the layout (including nested ViewGroups and their children). i'm building a simple recyclerview with custom layout (Text view and switch) and a custom adapter. This is typically done when a view child is animating a scroll using a scroller object, as shown the preceding Should you want to detect the direction change of the swipe there is a simple way: private GestureDetector gestureDetector; @Override protected void onCreate(Bundle savedInstanceState) { findViewById(R. setView(frameView); final Handling Multiple Touches. private var mVelocityTracker: VelocityTracker? = null override fun onTouchEvent(event: MotionEvent): Boolean { when (event. Each child that gets clicked on will then propagate the click to its parent, eventually getting to the ViewGroup's default touch Now, I don't know about onTouchEvent short circuiting onClick, and I don't know if maybe you need to set android:clickable to true (or setClickable(true)). getAction() returns the action type. Android onTouchListener. You might find these cached IDs helpful to handle other action events correctly. Drawing to canvas onDraw works, drawing onTouchEvent doesn't. GestureDetector so I can use it to detect gestures. Samples Try Quick Guidesᵇᵉᵗᵃ User interfaces A new onTouchEvent() is triggered with an ACTION_MOVE event whenever the current touch contact position, pressure, or size changes. To better understand the problem, to respect the standards and for the goal of my application, I planned the navigation drawer, which assumes the presence of many fragment (instead of activities). In case you want to disable all the views in a specific layout, one solution is adding a cover ( a front view that fills up the whole layout ) to consume all the touch events, so that no events would be dispatched to other views in that layout. I managed to get this to work in case anybody comes across the same issue, AlertDialog. If The touch system has one more important callback contrast to onInterceptTouchEvent that is onTouchEvent which also returns the boolean value. onTouchEvent() 也是基于事件回调的 onTouchEvent() 同样是触碰事件,onTouchEvent() 与 TouchListener 不同的是，前者基于回调，后者基于事件，前者更多的是用于自定义的 view 上一章节中我们学习了 基于回调 的事件处理机制，本章节我们用一个范例来巩固下知识，顺便学习下 onTouchEvent(). graphics. Commented Dec 16, 2014 at 15:54. This post will cover the main event listeners provided by the View class, as well as Set the listener. – hanswim. The warning states that certain accessibility functions use performClick() to activate buttons. util. onTouchEvent(event); } } and its onTouchListener: I have an imageview that I set OnLongClickListener on it. because Textview can not Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company I took a different approach for implementing double-tap on android views. nothing happened when screen was touched), I also tried putting an ImageView on top of the screen, and then making this view invisible. Drag an object Important: We recomment using Receive rich content to implement drag and drop. Samples Try Quick Guidesᵇᵉᵗᵃ User interfaces Permissions Background work Data and files Touches aren't Clicks. OnGestureListener supplied. AttributeSet; import android. However, in order to intercept this, you must extend the class Below are some pieces of code that may help to solve the problem: TestFragment. Why this `onDraw` doesn't be triggered? 0. Rect) (boolean) or set the android:filterTouchesWhenObscured layout attribute to true. Android Studio is marking the whole anonymous class with a similar warning @Override public boolean onTouchEvent(MotionEvent event) { @KonstantinKonopko You can add v. In practice, most Android devices can respond to multiple consecutive touches (though it is important to note that the number of simultaneous touches that can be detected varies depending on the device). 0x7fedd83ff450] worker parking 12-05 10:48:06. setOnTouchListener(new OnTouchListener(){ public boolean onTouch(View This example shows how to add a gesture detector to a view. view. If so should I be registering clicks through MotionEvents? Build AI-powered Android apps with Gemini APIs and more. This is typically done when a view child is animating a scroll using a scroller object, as shown the preceding example. View class which is the subclass of Kot public class GameView extends SurfaceView { //initialization and drawing stuff @Override public boolean onTouchEvent(MotionEvent ev) { return joystickOnScreen. My problem is i can't handle the click event for the switch (Which make it toggle its state), i have built a touch listener for the RecyclerView and it fires every time i click on the Switch. setTitle("My title") . log in onTouchEvent(). Although drag and fling are similar, drag is the type of scrolling that onTouchEvent does not work with this way but if I set it by test. setOnTouchListener( new View. out. Set listener on View; implement methods: faceView. Try to set click, long click and touch listener like this: btnAdd. I've tried implementing OnClickListener and using the following code: @Override public void onClick(final View view) { onClickListener is used whenever a click event for any view is raised, say for example: click event for Button, ImageButton. But inside onTouchEvent it always gives the action ACTION_DOWN. 0. The bottom view is MainActivity, and there are several fragments above MainActivity, which may contain buttons. setMessage("Enter password"); final FrameLayout frameView = new FrameLayout(context); builder. Add a comment | Alternative to make an action when pressing/realising a button, android. AttributeSet; import I have been working on game which simply creates a rectangle when user touches screen, I don't know how to get the X coordinates and Y coordinates of touchEvent to be the "float" of my rects, every time I put a float number in the X,Y coordinates it says "There is no applicable constructor in (float, float, int, int)". 5 Attribution License. A derived View Build AI-powered Android apps with Gemini APIs and more. I need react on user's touch event. setOnLongClickListener(new Button. The layout is just a single View inside of an Activity. Basically the code below is supposed to set an image as the canvas and allows you to paint/draw on it,I'm done setting the image as the background how ever it this is my code public class Main extends Activity { @Override public void onCreate(Bundle savedInstanceState) { super. public boolean onTouchEvent(MotionEvent event) { Log. Is it because I'm also overriding onTouchEvent()? Yes. package com. setOnClickListener(new OnClickListener() { public void onClick(View v) { mSoundManager. onTouch and onTouchEvent methods in Android. The term gesture is used to define a contiguous sequence of interactions between the touch screen and the user. Instead those touch events will be presented to the parent in the hierarchy. This call ensures the // callback occurs with the decor set. I have a fragment that draws a bitmap for me and I want this fragment to be full screen when touching The fragment has an image view that sets it to the bitmap I tried setting OnTouchListener inside the fragment for the view but I do Since Android is multi-touch, events are also fired when other fingers ("pointers") touch the screen. No need to set onClick() method onTouch() will handle both the case. Samples Try Quick Guidesᵇᵉᵗᵃ User interfaces Permissions Background work Data and files All core areas ⤵️ Hi Deev, I used onTouchEvent for placing marker on touch of map. Activity. Attempt to invoke virtual method 'boolean android. OnTouchListener; Then set the Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company Custom view ImageView has setOnTouchListener called on it but does not override performClick If a View that overrides onTouchEvent or uses an OnTouchListener does not also implement performClick and call it when clicks are detected, the View may not handle accessibility actions properly. 11. When doing this, you do not need to call a listener. onTouchEvent() Activity. findViewById(R. Android: onTouchEvent() and onClick events. onTouchEvent(event); } } and its onTouchListener: You will have to override onTouchEvent() for each view and ignore the user inputs. ACTION_DOWN -> { // Android supports a range of touch gestures, including tap, double tap, pinch, swipe, scroll, long press, drag and fling. Hot Network Questions If your onTouch() method returns false in response to the initial ACTION_DOWN MotionEvent, it will not receive any of the subsequent events that belong to this particular gesture. Android onTouchEvent in a view class. These UI elements are positioned according to a set of pre-defined rules and developer changes. I created my own logic for detecting double tap and it's very easy to implement. For each fragment I want to perform some operation when touching that fragment. onTouchEvent(event); is triggered. Builder(DialogActivity. Bitmap or android. onTouchEvent() 也是基于事件回调的 onTouchEvent() 同样是触碰事件,onTouchEvent() 与 TouchListener 不同的是，前者基于回调，后者基于事件，前者更多的是用于自定义的 view While not necessarily being ideal, this works well for smaller layouts that won't have dynamic content. setAdapter(new ImageAdapter(this)); If your onTouch() method returns false in response to the initial ACTION_DOWN MotionEvent, it will not receive any of the subsequent events that belong to this particular gesture. These properties include things such as the view's class name, content description, and checked state. Problem: the DrawerLayout prevents the call of onTouchEvent() in the MainActivity. In particular I would to be able to enable them only to a confined area in a fragment. 266-pre1. I am developing an app, which contains several fragments just like the picture below: Picture 1. gallery. onTouchEvent() If you need to write an Android onTouchEvent method inside a View class, here’s some example source code (boilerplate/skeleton code) that shows how to implement this method, including how to use the MotionEvent in the method, and how to get the x and y location of the touch event:. I read about Managing ViewGroup reference in android reference, but still it's confuses me. dispatchTouchEvent() ViewGroup. How to handle those touch events. xml) file: Just add . this This is Part 3 of my Android Touch System series. 2017. MotionEvent event) Analyzes the given motion event and if applicable triggers the appropriate callbacks on the GestureDetector. You will only get it inside onDraw(Canvas canvas) which is responsible for drawing on your Canvas. design. But I want to call this event manually without touching the screen. If you return false, Android system will be the handler of the onTouch event and will override your code for any events past ACTION_DOWN (which is the first event when you touch the screen). setSelection(1); after setting the adapter to gallery object, that is Android Studio, Java. First I've made an anonymous class in my Activity (this can be Android onTouchEvent in a view class. Inherit from that activity other activities. Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company Java documentation for android. I set in the child view onTouchEvent to @Override public boolean onTouchEvent(MotionEvent event) { return false; } Now when I create an instance of v2 in an Activity like I have an app that overrides the onTouchEvent(MotionEvent ev) of the MainActivity to determine Two-Finger-Swipe and Pich-Open/Pinch-Close. onTouchEvent(event); } private final class GestureListener extends GestureDetector I am developing Android 2. To see the output, try either writing to logcat public class GameView extends SurfaceView { //initialization and drawing stuff @Override public boolean onTouchEvent(MotionEvent ev) { return joystickOnScreen. One other workaround would be to add a callback to be called before androidGesturesManager. 5 Drag Image on Touch I'm trying to capture the TouchRelease event in Android. example; import android. (I can't change my structure and can't move ViewPager to above of NestedScrollView or set TopMargin to NestedScrollView) (false); Solution: This Problem solved With overwriting NestedScrollView and Override onTouchEvent. View. FrameLayout; /** * A FrameLayout that allow setting a delegate for intercept touch event */ public class InterceptTouchFrameLayout extends FrameLayout { private Ontouchevent is not working and I can't figure out why,there are no exceptions or errors and am pretty sure my code is correct ,however when I touch the screen there is no response. dispatchTouchEvent works nicely to guarantee that touches are detected but will eat cpu as it fires continuously while holding (and i dont think onTouchEvent fires continuously). To phrase that another way, if you return false from onTouch() during the start of a gesture (the You need to set this properties for the element android:focusable="true" android:clickable="true" if not, just produce the down action. EditText. In this article, we will discuss how to handle touch events in Android. Each touch event follows the pattern of (simplified example): Activity. 2 How to set onTouchEvent on Bitmap image using canvas. getX and getY give you the coordinates relative to the view (that is, the top left corner of the view). Android - onTouchEvent only working first time. (i. There are no easy OnClick like methods for touches, as touches can be a lot more complex (tap, long tap, drag, etc), so you When onFling() calls postInvalidateOnAnimation(), it triggers computeScroll() to update the values for x and y. Here I have a imageview . 4. Activity; import android. Sorted by: 141. TargetApi; import android. Share I guess that this might be due to the overloading of main thread due to which onTouchEvent is starving. This post will cover the main event listeners provided by the View class, as well as standalone gesture detector classes. 2. At the same time, I am listening to the Activity generic OnTouchEvent. Share. Following is my code: When talkback is ON, on single tap it will call dispatchHoverEvent() and on double tap it will call dispatchTouchEvent() then onTouchEvent(). Samples Try Quick Guidesᵇᵉᵗᵃ User interfaces Permissions Background work Data and files All core areas ⤵️ I want to create my custom EditText by extending my class to EditText. setOnClickListener(new View. If you look in the View class, the performClick() funtions calls the onClickListener directly, meaning the code in the onTouchListener will not be executed onTouchEvent() actually occour when we touch on the screen. onTouchEvent(event); } I have a custom view on which I want to set long click listener. I read lot about dispatchTouch event onTouchEvent, setOntouchListener. MotionEvent; import android. SimpleOnGestureListener() { public void onLongPress(MotionEvent e) { Log. Understanding how to work around touch For instance, when a View (such as a Button) is touched, the onTouchEvent() method is called on that object. The first problem is that when a View is clickable - it always consumes ACTION_UP event (it returns true in onTouchEvent This worked in my case too, except I was able to set it straight in the XML: android:descendantFocusability="blocksDescendants" – akent. The trick is, in your Gesture Detector, you get the viewholder for the view that was clicked, calculate the hit rectangle coordinates for your button ("overflow" in my case) and, if the hit rectangle contains the event coordinates, you consume the event, otherwise you do your row click. ) and call invalidate(), then onDraw will be triggered and you can draw your Canvas with desired needs which you will get from the instance values you set in In case you're not using a Custom View which explicitly overrides onPerformClick, the warning won't get removed by just following Secko's answer. While the onTouchListener provides a convenient way to respond android. onTouchEvent(ev); } } Share Improve this answer But my scenario is a little different since I'm setting an anonymous OnTouchListener when setting up the RecyclerView (calling myRecyclerView. 032 I/MonoDroid( 3096): at In this video, you are going to learn how to apply sprite animation in Andriod Studio and onTouchEvent(). But I am unable to detect that event, as a matter of fact, no event is beign detected at all. annotation. So the solution: first of all instead of accessing my textView directly I had to use . ACTION_DOWN しかイベントが発生しません。 Activity の場合は super. Set touchListener and return true in both. If you return true from the onTouch() method, Android will consider it consumed and not pass it on to the other various touch handlers (which I am assuming will include the ClickListener). my goal is to get next picture from database when move the finger on image float nPicturePositionM = 0; public boolean onTouch(View I have an application that have multiple fragments . In other words true means that this touch event is interesting to you and all follow up calls of this touch event like ACTION_MOVE or ACTION_UP will be delivered to you. True will tell the event bubbling that the event was consumed therefore prevent event from bubbling to other views. public class TestFragment extends Fragment { private static final String I'm building an interface where I need to process touch events. Try this way. add touch event listener to android canvas. Images on canvas. . In single-touch events, there is only one pointer (set to 0), so no bitmap mask is needed. MainActivity. The basic idea is to add an OnTouchListener to the view. I want to add a fragment on top in order to listen the OnTouchEvents (gestures), but ignore the onclick events and pass the onclick events to the I tried to use the onTouchEvent() <RelativeLayoutPanel android:id="@+id/parent"> </RelativeLayout> now set onclick attribute of the parent layout of the activity to above method hideKeyboard either from the Design view of your XML file or writing below code in Text view of your XML file. Do you know how to capture the touch release event. myView). How to set onTouchListener on BitMap. Commented Dec 19, 2019 at 10:50. setSelection(1); after setting the adapter to gallery object, that is this line: gallery. android; bitmap; Android: ImageView that extends onTouchEvent for Drag. Click, Press and Release event I had the same problem when adding an overflow button to my RecyclerView's rows. onTouchListener is used whenever you want to implement Touch kind of functionality, say for example if you want to get co-ordinates of screen where you touch exactly. Further study. onTouchEvent() takes on one argument [onTouchEvent(MotionEvent e)]. setOnTouchListener(new OnTouchListener() { @Override public boolean onTouch(View v, MotionEvent event) { return true; } }); I have the following code for Android which works fine to play a sound once a button is clicked: Button SoundButton2 = (Button)findViewById(R. onTouchEvent() ViewGroup. fun hideKeyboard(view: View) { val imm = Handling click and touch events in Android. Button Click Listener Activity. But this onTouchEvent isn’t called! When I add thi I am currently using onTouchEvent(MotionEvent event) { } to detect when the user presses my glSurfaceView is there a way to detect when a long click is made. os. Button or Button you need to make a simple custom view which extends the target view. Can anyone explain me, how the default touch events for a default EditText works? Like when we click on the EditText, which MotionEvent gets triggered to show the keyboard to input text etc. there is a setContentView () which takes a layout id. content. The onTouchEvent() method is called whenever the user interacts with the screen. protected boolean onTouchEvent (MotionEvent me) { return true; } For v1 you would do an import: import android. example. Builder builder=new AlertDialog. performClick() in ACTION_UP case if needed, or just return false. After I click the map and the marker is dra Returning true in an onTouchEvent() tells Android system that you already handled the touch event and no further handling is required. FrameLayout; /** * A FrameLayout that allow setting a delegate for intercept touch event */ public class InterceptTouchFrameLayout extends FrameLayout { private Build AI-powered Android apps with Gemini APIs and more. You should do: this. Rect) Called when the view gains or loses focus. playSound(2); } }); Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company The return value determines if you consumed the touch event. Could some Android experts over here give me some tips to reduce the load on main thread if it's getting overloaded, or @Smashing: I know how intercept touch events to WebView, but I need to know whether the WebView consumed them. I have seen that event. please help , thanks. For example, if each page in the swipe view needs to consume the entire layout, then your layout looks like this: Note: If you have a large or potentially infinite number of pages, set the android:tabMode attribute on your TabLayout to "scrollable". public boolean onTouchEvent(MotionEvent event){ return false; } The EditText is the standard text entry widget in Android apps. custom was returning null for me. ) and call invalidate(), then onDraw will be triggered and you can draw your Canvas with desired needs which you will get from the instance values you set in Here is modified example from Developer Android. put a Button and a Textview in activity. because Textview can not Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company I have an imageview that I set OnLongClickListener on it. As described in Detect common This article explains how to use GestureDetector in Android. I'm guessing if I can't find much in the dev docs then it will be some sort of work around method. Context; import android. OnTouchListener() { GestureDetectorCompat gDetector = new GestureDetectorCompat(getActivity() , new GestureDetector. There are many important properties that can be set to customize the behavior of an EditText. setOnTouchListener(this); gestureDetector = new GestureDetector(this, this); } How to set onTouchEvent on Bitmap image using canvas. One such listener is the onTouchListener, which allows developers to handle touch events on various UI elements in their Android applications. The parent view v1 has an onTouchEvent, but I would like the child view v2 to not use the onTouchEvent. MediaController. A common operation for a touch gesture is to use it to drag an object across the screen. Follow edited Jul 26, 2016 at 10:37. touch the Textview --> onTouchEvent() will be called. Please notice, that the onTouchEvent function is copied word by word from the official android webiste here. Portions of this page are modifications based on work created and shared by the Android Open Source Project and used according to terms described in the Creative Commons 2. onCreate(savedInstanceState); @Smashing: I know how intercept touch events to WebView, but I need to know whether the WebView consumed them. But, if you can't make it work cleanly, you can use a boolean in the onTouchEvent to mimic click detection if all else fails. If so should I be registering clicks through MotionEvents? onTouchEvent(MotionEvent) Called when a touch screen motion event occurs. Add an onTouchEvent method to the view with top position then return true. 032 I/MonoDroid( 3096): System. a. You should make sure that the TouchListener is not 'consuming' the touch event. onTouchEvent() not working as I intend. myView. – import android. Focus: onFocusChanged(boolean, int, android. Im using Xamarin. drawable. Hot Network Questions Build exterior cabin walls using plywood siding Simulate photodiode in ltspice Smoking on a hotel room's balcony in Greece In your class definition: public class main_activity extends Activity { //variable for counting two successive up-down events int clickCount = 0; //variable for storing the time of first click long startTime; //variable for calculating the total time long duration; //constant for defining the time duration between the click that can be considered as double-tap static final int What is the difference between a view's onTouchEvent: public class MyCustomView extends View { // THIS : @Override public boolean onTouchEvent(MotionEvent event) { return super. In your onTouchEvent, set some instance variables (such as color, positions etc. I am using following code to set the same. 12-05 10:48:06. Android provides the GestureDetector class for detecting common If you need to write an Android onTouchEvent method inside a View class, here’s some example source code (boilerplate/skeleton code) that shows how to implement this Dealing with touch gestures on Android can seem daunting to beginners. Thus this can be used only inside the view that implements it or on the derived view. onTouchEvent (ev); // Handle touch events here. But the button click does not appear to be registered. Remove the pointers from your cache at their ACTION_POINTER_UP and ACTION_UPevents. actionMasked) { MotionEvent. This article covers important concepts about Motion Events with drag-drop of a view and related callbacks in Android. 1. setOnTouchListener(new OnTouchListener() How to get imageView inside onTouchEvent(MotionEvent event) in android. cvqra lbasggb vptouu opdsu pzgol ebdu yegw nqnea hcmwo saw