I'm making an app in which you touch a specific word on the screen and that word gets pronounced. But when I tap on any word, it gets pronounced at least twice and if I hold my finger on the word it gets pronounced so many times and I don't want that. Can I detect the touch as only a tap on the screen? And if the user holds or did a long press, I want something entirely different to happen like copying the word for example.
I tried to do that based on someone's code but both the if and else statements run!
@Override
public boolean onTouchEvent(MotionEvent event) {
int touchX = Math.round(event.getX());
int touchY = Math.round(event.getY());
long startClickTime = System.currentTimeMillis();
//words are surrounded with rect objects because i'm using the TextRecognition library that Google provided
for(int x=0; x< rects.size();x++) {
if (System.currentTimeMillis() - startClickTime < ViewConfiguration.getTapTimeout()) {
// Touch was a simple tap. Do whatever.
Log.i("TTS", "Touch was a simple tap!");
if (rects.get(x).contains(touchX, touchY)) {
// a word has been clicked -> some code to pronounce the word
return true;
} else {
// Touch was a not a simple tap.
Log.i("TTS", "Touch was a not a simple tap!");
}
}
}
return super.onTouchEvent(event);
}
I also tried the onDown(), onShowPress(), onSingleTapUp() and onLongPress() methods but none of them does anything and I don't know why of should i use them better of the onTouchEvent() method.
So, I was able to perfectly handle touch events by implementing the GestureDetector.OnGestureListener methods in conjunction with the onTouchEvent() methods.
private GestureDetectorCompat mDetector;
boolean mIsScrolling;
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_preview);
// Instantiate the gesture detector with the
// application context and an implementation of
// GestureDetector.OnGestureListener
mDetector = new GestureDetectorCompat(this,this);
//set TouchListener on previewLayout
previewLayout.setOnTouchListener(new View.OnTouchListener() {
public boolean onTouch(View v, MotionEvent event) {
if (mDetector.onTouchEvent(event)) {
return true;
}
if(event.getAction() == MotionEvent.ACTION_UP) { //when user left his finger up
if(mIsScrolling) { //if it was a scroll action
handleScrollFinished();
mIsScrolling = false; //set mIsScrolling back to false
}
}
return PreviewActivity.super.onTouchEvent(event);
}
});
}
.
@Override
public boolean onDown(MotionEvent event) {
//Do stuff
return true;
}
@Override
public boolean onSingleTapUp(MotionEvent event) {
//So stuff
return true;
}
@Override
public void onLongPress(MotionEvent event) {
//Do stuff
}
@Override
public boolean onScroll(MotionEvent event1, MotionEvent event2, float distanceX,
float distanceY) {
mIsScrolling = true;
//Do stuff
return true;
}
private void handleScrollFinished() {
//Do stuff
}
@Override
public boolean onFling(MotionEvent event1, MotionEvent event2,
float velocityX, float velocityY) {
return false; //it has to return false, or I will have to write unnecessary extra code
}
@Override
public void onShowPress(MotionEvent event) {
}
Things that helped me through: