the example below makes my Expandable List dissapear as soon as I set either the OnTouch listener or onCLick listener.
I have a ActivityswipeDetector Class:
public class ActivitySwipeDetector implements View.OnTouchListener {
public static enum Action {
LR, // Left to Right
RL, // Right to Left
TB, // Top to bottom
BT, // Bottom to Top
None // when no action was detected
}
private static final String logTag = "SwipeDetector";
private static final int MIN_DISTANCE = 100;
private float downX, downY, upX, upY;
private Action mSwipeDetected = Action.None;
public boolean swipeDetected(){
return mSwipeDetected != Action.None;
}
public Action getAction(){
return mSwipeDetected;
}
public boolean onTouch(View v, MotionEvent event) {
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN: {
downX = event.getX();
downY = event.getY();
mSwipeDetected = Action.None;
return false; // allow other events like Click to be processed
}
case MotionEvent.ACTION_UP: {
upX = event.getX();
upY = event.getY();
float deltaX = downX - upX;
float deltaY = downY - upY;
// horizontal swipe detection
if (Math.abs(deltaX) > MIN_DISTANCE) {
// left or right
if (deltaX < 0) {
Log.i(logTag, "Swipe Left to Right");
mSwipeDetected = Action.LR;
return false;
}
if (deltaX > 0) {
Log.i(logTag, "Swipe Right to Left");
mSwipeDetected = Action.RL;
return false;
}
} else
// vertical swipe detection
if (Math.abs(deltaY) > MIN_DISTANCE) {
// top or down
if (deltaY < 0) {
Log.i(logTag, "Swipe Top to Bottom");
mSwipeDetected = Action.TB;
return false;
}
if (deltaY > 0) {
Log.i(logTag, "Swipe Bottom to Top");
mSwipeDetected = Action.BT;
return false;
}
}
return false;
}
}
return false;
}
}
And within my main class I add the following at the top of the onCreate method- but the first two lines make the Expandable list dissapear:
final ActivitySwipeDetector swipeDetector = new ActivitySwipeDetector();
list.setOnTouchListener(swipeDetector);
list.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
if (swipeDetector.swipeDetected()){
// do the onSwipe action
} else {
// do the onItemClick action
}
}
});
list.setOnItemLongClickListener(new OnItemLongClickListener() {
public boolean onItemLongClick(AdapterView<?> parent, View view,int position, long id) {
if (swipeDetector.swipeDetected()){
// do the onSwipe action
return true;
} else {
// do the onItemLongClick action
return false;
}
}
});
the "list" is defined as list= getExpandableListView();
So 1) what am I doing wrong that makes the expandable list dissapear
2) Should I be using onGroupClick listener and onChildClick listeners? If so please advise n where I add them
3) Where it says "do the swipe action" and "do the OnItemClick action", what do I add?
I am to use left-to-right swipes to expand on an item in the list
right-to-left- swipes to go back, and I have a button that has code for that already so i should just replace that with the swipe I assume?
Any Help would be greatly appreciated!
Z
