I have tried below to disable two finger touch by putting in my fragment layout but did not workandroid:splitMotionEvents="false"
Also i tried below in manifest: <uses-feature android:name="android.hardware.touchscreen.multitouch" android:required="false" /> No help.
If anyone knows how to please let me know. Thanks
gestureOverlayView.setOnTouchListener(new View.OnTouchListnener(){
#Override
public boolean onTouch(View v, MotionEvent e){
// True means the event is ignored by the overlayed views
return e.getPointerCount() > 1 ? true : false;
}
}
You can put a GestureOverlayView the whole screen and only allow the first touch event.
You can refer to this answer already there on Stackoverflow
Disable multi finger touch in my app
Use Below code to check run time multitouch and disable it:
private SparseArray<PointF> mActivePointers= new SparseArray<PointF>();
yourlayoutname.setOnTouchListener(new View.OnTouchListener() {
#Override
public boolean onTouch(View v, MotionEvent event) {
int pointerIndex = event.getActionIndex();
// get pointer ID
int pointerId = event.getPointerId(pointerIndex);
// get masked (not specific to a pointer) action
int maskedAction = event.getActionMasked();
switch (maskedAction) {
case MotionEvent.ACTION_DOWN:
case MotionEvent.ACTION_POINTER_DOWN: {
// We have a new pointer. Lets add it to the list of pointers
PointF f = new PointF();
f.x = event.getX(pointerIndex);
f.y = event.getY(pointerIndex);
mActivePointers.put(pointerId, f);
if (mActivePointers.size() >= 2) {
//DO NOTHING
}
break;
}
case MotionEvent.ACTION_UP:
case MotionEvent.ACTION_POINTER_UP:
case MotionEvent.ACTION_CANCEL: {
mActivePointers.remove(pointerId);
break;
}
}
return true;
}
});
Related
I am trying the android motion event. However, I do not know why it cant go to > case MotionEvent.ACTION_MOVE:
Here is my codes.
#Override
public boolean onTouch(View v, MotionEvent event) {
int action = event.getAction();
switch (action){
case MotionEvent.ACTION_DOWN:
startX = (int)event.getX();
startY = (int)event.getY();
selecting=false;
break;
case MotionEvent.ACTION_MOVE:
selecting=true;
break;
case MotionEvent.ACTION_UP:
if(selecting){
endX = (int)event.getX();
endY = (int)event.getY();
selected=true;
}
selecting=false;
break;
}
}
No matter how I swipe and touch, even if I remove if(selecting) condition in case MotionEvent.ACTION_UP, it always show same output.
start: {498.0, 365.0}
end: {0.0, 0.0}
selecting: false
selected: false
After I change it to
public boolean onTouchEvent(MotionEvent event)
everything is okay. Can anyone explain to me why does it happen?
If possible, help me to solve this problem too. How to get the actual point when I touch on screen?
In order to get the following MotionEvents, you must return true in the onTouchEvent method.
source
I am developing a game and I need to be able to detect that one finger is performing a MOVE while posibly another finger can TOUCH another part of the screen.
With the following code I am able to detect both the ACTION_MOVE (on certain region of the screen) and the ACTION_DOWN
public boolean onTouch(View v, MotionEvent event) {
final int dest_x = (int) event.getX();
final int dest_y = (int) event.getY();
onTrackPad = dbSettings.TRACK_PAD.contains(dest_x, dest_y);
switch (event.getAction()) {
case MotionEvent.ACTION_MOVE:
if (onTrackPad)
{
//move character
}
break;
case MotionEvent.ACTION_DOWN:
// Fire bullets
break;
}
//The event was consumed
return true;
}
The problem is that I am not able to move and fire at the same time (I need to stop moving in order to fire and viceversa)
I am aware that Android can handle multi-touch events but have not figure it how to use that to be able to process these events and the same time so that the player can move and fire at the same time
I have also try using the getActionMasked without any luck
After reading this question Android MotionEvent.getActionIndex() and MultiTouch
This is how I solved the problem
public boolean onTouch(View v, MotionEvent event) {
int dest_x ;
int dest_y ;
p = event.getActionIndex() ;
dest_x = (int) event.getX(p);
dest_y = (int) event.getY(p);
onTrackPad = dbSettings.TRACK_PAD.contains(dest_x, dest_y);
action = event.getActionMasked() ;
switch (action) {
case MotionEvent.ACTION_MOVE:
if (onTrackPad)
{
//move character
}
break;
case MotionEvent.ACTION_DOWN:
// Fire bullets
break;
}
//The event was consumed
return true;
}
MotionEvent has all information about touches that you need. You can get number of touches by executing event.getPointersCount(), and try to check MotionEvent.ACTION_POINTER_2_DOWN instead of MotionEvent.ACTION_DOWN. To get coordinates of each touch you can use event.getX(0) and event.getX(1), same is for y. If you have a case of MotionEvent.ACTION_MOVE with 2 touches, you will receive all this information in your motion event.
Try below code.
when multiple pointers touches on the screen,system generates the action events.we can keep track of individual pointers with in motion event using pointer id. Pointer id persists across touch events and also allows to track individual pointer across entire gesture.
#Override
public boolean onTouch(View v, MotionEvent event) {
int index = event.getActionIndex();
int pointerID = event.getPointerId(index);
int action = event.getActionMasked();
if(event.getPointerCount() > 1)
{
Log.i("TouchType ", "Multi Touch");
for(int i = 0; i < event.getPointerCount(); i++)
{
performAction(action);
}
}else
{
Log.i("TouchType ", "Single Touch");
performAction(action);
}
return true;
}
public void performAction(int action){
switch(action)
{
case MotionEvent.ACTION_DOWN :
Log.i("OnTouch ", "Pressed");
// Fire bullets
break;
case MotionEvent.ACTION_MOVE :
Log.i("OnTiouch", "move");
//move character
break;
case MotionEvent.ACTION_UP :
Log.i("OnTiouch", "Up");
break;
default:
Log.i("OnTiouch", "None");
}
}
In a Custom ListView extending Cursoradapter, I need both Listview and image button to get focussed. How to do it?
Implement your own OnTouchListener for ListView which conditional return values. If you return TRUE from onTouch, the system will assume that the onTouch was handled and it won't handle it by itself. If you return FALSE from onTouch, system will assume that the OnTouchListener did not handle the touch events and will do further processing. This way you can manage how the touch / click should work with ImageButton in a ListView.
I don't know what exactly your implementation is. But it may give you a little idea...
boolean pressedImageButton = false;
myListView.setOnTouchListener(new OnTouchListener() {
#Override
public boolean onTouch(View v, MotionEvent event) {
switch(action)
{
case MotionEvent.ACTION_DOWN:
float positionX = event.getRawX();
float positionY = event.getRawY();
if(some conditions with positionX and positionY)
pressedImageButton = true;
break;
case MotionEvent.ACTION_MOVE:
break;
case MotionEvent.ACTION_UP:
if(pressedImageButton)
myImageButton.performClick(); // or whatever action you want to perform on that ImageButton
pressedImageButton = false;
break;
}
}
});
I hope this helps. :)
I'm developing an application where I'm applying on touch listener to my layout view. I move the layout over screen but that layout doesn't respond well after 10 to 15 secs. Here is my code:
base = (LinearLayout) findViewById(R.id.load);
base.setOnTouchListener(new OnTouchListener() {
#Override
public boolean onTouch(View v, final MotionEvent event) {
int motion = event.getAction();
int numberOfPointers = event.getPointerCount();
if (numberOfPointers < 3) {
switch (motion & MotionEvent.ACTION_MASK) {
case MotionEvent.ACTION_DOWN:
drag = true;
break;
case MotionEvent.ACTION_POINTER_DOWN: {
drag = false;
if (drawWaveForm != null) {
zoom = true;
}
// initial x1 and x2
BitmapDetector.prevX1 = Math.min(event.getX(0), event.getX(1));
BitmapDetector.prevX2 = Math.max(event.getX(0), event.getX(1));
BitmapDetector.prevY1 = event.getY(0);
BitmapDetector.prevY2 = event.getY(1);
}
break;
case MotionEvent.ACTION_MOVE:
if (drag && event.getActionIndex() == 0) {
// Log.d("detecting","inside the action move");
if (touching == false) {
touching = detector.isWaveformAnchor(event.getX(0), event.getY(0));
} else if (touching == true) {
float diff = event.getY(0) - loadWaveFormManager.getCh1_pos();
if ((loadWaveFormManager.getCh1_pos() + diff) < (StaticValues.screenHeight - 50)) {
int tempCh1_pos = (int) (loadWaveFormManager.getCh1_pos() + diff);
loadWaveFormManager.setCh1_pos(tempCh1_pos);
}
drawWaveForm.update(loadWaveFormManager);
}
}
break;
case MotionEvent.ACTION_UP:
// Log.d("detecting","inside the action up");
drag = false;
touching = false;
zoom = false;
break;
case MotionEvent.ACTION_POINTER_UP:
// here different function
return;
}
});
Does anyone have any idea about this? Please help me on this one.
It is not clear from your code what is your problem and when does it happen. I don't see any TimerTask or AsyncTask reference.
I guess, you're trying to do some expensive operation in UI thread, and this freezes your application. Possible long-running candidate is drawWaveForm.update(loadWaveFormManager)
If this is so, you should preform your computations asynchronously, and only then update UI.
By the way, your code will not compile at all:
public boolean onTouch(View v, final MotionEvent event)
should return true or false, instead you perform return; at the end of this method. That leads to an assumption, that you're providing irrelevant code in your question, but still want to receive a relevant answer.
Provide relevant code piece for further analyze.
Currently you are starting thread on touch event use handler instead
of thread
My problem is that when I try to drag an item in my ListView, I don't always get the ACTION_DOWN event. I got lots of ACTION_MOVE events and only one ACTION_UP event.
It is not always the case. I got ACTION_DOWN 3 times. It confused me.
I looked at similar questions but it's answers seems not fit to mine . Can anyone think of why this is happening?
Thanks
//list_client -- a listview
list_client.setOnTouchListener(new View.OnTouchListener() {
float f1 = -1, f2 = -1 ;
#Override
public boolean onTouch(View v, MotionEvent event) {
switch(event.getAction()){
case MotionEvent.ACTION_DOWN:
f1 = event.getRawY();
break;
case MotionEvent.ACTION_MOVE:
f2 = event.getRawY();
if(f2 - f1 > 50){
if(View.VISIBLE != rl_search_and_add.getVisbility() && ){ rl_search_and_add.setVisibility(View.VISIBLE);
}
f1 = f2;
}else if (f2 - f1 < -50){
rl_search_and_add.setVisibility(View.GONE);
f1 = f2;
}
break;
case MotionEvent.ACTION_UP:
f1 = -1; f2 = -1;
break;
}
return false;
}
});
There could be several reasons for that behavior.
It is possible that the user missed the list a bit and the MotionEvent.ACTION_DOWN been handled by other component, but how ever the user continue dragging and hit your list view area, you received MotionEvent.ACTION_MOVE actions.
Another possibility is that, you had to many events, and they been moved to historical event, and you only received the latest event. You can use all the historical methods of MotionEvent to see them.
you should override onInterceptTouchEvent like this:
#Override
public boolean onInterceptTouchEvent(MotionEvent event) {
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN:
yDown = event.getRawY();
break;
default:
break;
}
return super.onInterceptTouchEvent(event);
}
then using yDown to your program