I got this stack trace today and I had a problem finding the problem.
java.lang.ArrayIndexOutOfBoundsException at android.view.MotionEvent.getY(MotionEvent.java:792) at android.widget.ScrollView.onTouchEvent(ScrollView.java:509) at android.view.View.dispatchTouchEvent(View.java:3766) at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:897) at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:936) at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:936) at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:936) at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:936) at com.android.internal.policy.impl.PhoneWindow$DecorView.superDispatchTouchEvent(PhoneWindow.java:1720) at com.android.internal.policy.impl.PhoneWindow.superDispatchTouchEvent(PhoneWindow.java:1117) at android.app.Activity.dispatchTouchEvent(Activity.java:2086) at com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchTouchEvent(PhoneWindow.java:1704) at android.view.ViewRoot.handleMessage(ViewRoot.java:1794) at android.os.Handler.dispatchMessage(Handler.java:99) at android.os.Looper.loop(Looper.java:143) at android.app.ActivityThread.main(ActivityThread.java:4701) at java.lang.reflect.Method.invokeNative(Native Method) at java.lang.reflect.Method.invoke(Method.java:521) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626) at dalvik.system.NativeStart.main(Native Method)
It seems to me that the problem is in this piece of code. But it is so small and simple, I just do not see it. Any ideas?
@Override public boolean dispatchTouchEvent(MotionEvent me){ this.detector.onTouchEvent(me); return super.dispatchTouchEvent(me); } public void onSwipe(int direction) { String str = ""; switch (direction) { case SimpleGestureFilter.SWIPE_RIGHT : wv.loadUrl("javascript:slideRight()"); break; case SimpleGestureFilter.SWIPE_LEFT : wv.loadUrl("javascript:slideLeft()"); break; case SimpleGestureFilter.SWIPE_DOWN : wv.loadUrl("javascript:slideDown()"); break; case SimpleGestureFilter.SWIPE_UP : wv.loadUrl("javascript:slideUp()"); break; } }
Could this be a bug that is native to android?
Edit: I use this for this.detector.onTouchEvent (me); to listen to swipe events.
public class SimpleGestureFilter extends SimpleOnGestureListener{ public final static int SWIPE_UP = 1; public final static int SWIPE_DOWN = 2; public final static int SWIPE_LEFT = 3; public final static int SWIPE_RIGHT = 4; public final static int MODE_TRANSPARENT = 0; public final static int MODE_SOLID = 1; public final static int MODE_DYNAMIC = 2; private final static int ACTION_FAKE = -13; //just an unlikely number private int swipe_Min_Distance = 200; private int swipe_Max_Distance = 800; private int swipe_Min_Velocity = 100; private int mode = MODE_DYNAMIC; private boolean running = true; private boolean tapIndicator = false; private Activity context; private GestureDetector detector; private SimpleGestureListener listener; public SimpleGestureFilter(Activity context,SimpleGestureListener sgl) { this.context = context; this.detector = new GestureDetector(context, this); this.listener = sgl; } public void onTouchEvent(MotionEvent event){ if(!this.running) return; boolean result = this.detector.onTouchEvent(event); if(this.mode == MODE_SOLID) event.setAction(MotionEvent.ACTION_CANCEL); else if (this.mode == MODE_DYNAMIC) { if(event.getAction() == ACTION_FAKE) event.setAction(MotionEvent.ACTION_UP); else if (result) event.setAction(MotionEvent.ACTION_CANCEL); else if(this.tapIndicator){ event.setAction(MotionEvent.ACTION_DOWN); this.tapIndicator = false; } } //else just do nothing, it Transparent } public void setMode(int m){ this.mode = m; } public int getMode(){ return this.mode; } public void setEnabled(boolean status){ this.running = status; } public void setSwipeMaxDistance(int distance){ this.swipe_Max_Distance = distance; } public void setSwipeMinDistance(int distance){ this.swipe_Min_Distance = distance; } public void setSwipeMinVelocity(int distance){ this.swipe_Min_Velocity = distance; } public int getSwipeMaxDistance(){ return this.swipe_Max_Distance; } public int getSwipeMinDistance(){ return this.swipe_Min_Distance; } public int getSwipeMinVelocity(){ return this.swipe_Min_Velocity; } @Override public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) { final float xDistance = Math.abs(e1.getX() - e2.getX()); final float yDistance = Math.abs(e1.getY() - e2.getY()); if(xDistance > this.swipe_Max_Distance || yDistance > this.swipe_Max_Distance) return false; velocityX = Math.abs(velocityX); velocityY = Math.abs(velocityY); boolean result = false; if(velocityX > this.swipe_Min_Velocity && xDistance > this.swipe_Min_Distance){ if(e1.getX() > e2.getX()) // right to left this.listener.onSwipe(SWIPE_LEFT); else this.listener.onSwipe(SWIPE_RIGHT); result = true; } else if(velocityY > this.swipe_Min_Velocity && yDistance > this.swipe_Min_Distance){ if(e1.getY() > e2.getY()) // bottom to up this.listener.onSwipe(SWIPE_UP); else this.listener.onSwipe(SWIPE_DOWN); result = true; } return result; } @Override public boolean onSingleTapUp(MotionEvent e) { this.tapIndicator = true; return false; } @Override public boolean onDoubleTap(MotionEvent arg0) { this.listener.onDoubleTap();; return true; } @Override public boolean onDoubleTapEvent(MotionEvent arg0) { return true; } @Override public boolean onSingleTapConfirmed(MotionEvent arg0) { if(this.mode == MODE_DYNAMIC){ // we owe an ACTION_UP, so we fake an arg0.setAction(ACTION_FAKE); //action which will be converted to an ACTION_UP later. this.context.dispatchTouchEvent(arg0); } return false; } static interface SimpleGestureListener{ void onSwipe(int direction); void onDoubleTap(); } }
android debugging gesture
user401183
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