我正在写一个平台游戏，我在使用Jelly Bean的设备上遇到多点触控问题。我屏幕上有3个按钮 - 左箭头，右箭头和跳跃按钮。在我使用Gingerbread的手机上，我可以快速按下按钮，应用程序不会崩溃，但在我的朋友的手机上使用Jelly Bean，一旦他开始发送垃圾邮件按钮就会崩溃（我的意思是一次不止一个，所以我猜它是多点触控的问题） 。这是我处理触摸的代码：
public boolean onTouchEvent(MotionEvent event) {
int pointerIndex = (event.getAction() & MotionEvent.ACTION_POINTER_ID_MASK) >> MotionEvent.ACTION_POINTER_ID_SHIFT;
int pointerId = event.getPointerId(pointerIndex);
if (event.getActionMasked() == MotionEvent.ACTION_DOWN || event.getActionMasked() == MotionEvent.ACTION_POINTER_DOWN) {
if(currentState == GAME_RUNNING) {
leftArrow.handleActionDown((int)event.getX(pointerId), (int)event.getY(pointerId), pointerId);
if(leftArrow.isTouched() && leftArrow.getPointerId() == pointerId)
hero.setDirectionLeft();
rightArrow.handleActionDown((int)event.getX(pointerId), (int)event.getY(pointerId), pointerId);
if(rightArrow.isTouched() && rightArrow.getPointerId() == pointerId)
hero.setDirectionRight();
jumpButton.handleActionDown((int)event.getX(pointerId), (int)event.getY(pointerId), pointerId);
if(jumpButton.isTouched() && jumpButton.getPointerId() == pointerId)
jumped = true;
}
else
activity.finish();
}
if (event.getActionMasked() == MotionEvent.ACTION_UP || event.getActionMasked() == MotionEvent.ACTION_POINTER_UP) {
if(currentState == GAME_RUNNING) {
if(leftArrow.isTouched() && leftArrow.getPointerId() == pointerId)
leftArrow.setTouched(false);
if(rightArrow.isTouched() && rightArrow.getPointerId() == pointerId)
rightArrow.setTouched(false);
if(jumpButton.isTouched() && jumpButton.getPointerId() == pointerId) {
jumpButton.setTouched(false);
}
}
}
if (event.getActionMasked() == MotionEvent.ACTION_MOVE) {
int pointerCount = event.getPointerCount();
for(int i = 0; i < pointerCount; ++i)
{
pointerIndex = i;
pointerId = event.getPointerId(pointerIndex);
if(currentState == GAME_RUNNING) {
leftArrow.handleActionDown((int)event.getX(pointerId), (int)event.getY(pointerId), pointerId);
if(leftArrow.isTouched() && leftArrow.getPointerId() == pointerId) {
if(rightArrow.isTouched() && rightArrow.getPointerId() == pointerId)
rightArrow.setTouched(false);
hero.setDirectionLeft();
}
rightArrow.handleActionDown((int)event.getX(pointerId), (int)event.getY(pointerId), pointerId);
if(rightArrow.isTouched() && rightArrow.getPointerId() == pointerId) {
if(leftArrow.isTouched() && leftArrow.getPointerId() == pointerId)
leftArrow.setTouched(false);
hero.setDirectionRight();
}
}
}
}
return true;
}
也来自按钮类：
public boolean isTouched() {
return touched;
}
public void setTouched(boolean touched) {
this.touched = touched;
}
public int getPointerId() {
return pointerId;
}
public void handleActionDown(int eventX, int eventY, int id) {
if (eventX >= (x - (bitmap.getWidth()) / 2) && (eventX <= (x + (bitmap.getWidth()) / 2)))
if (eventY >= (y - (bitmap.getWidth()) / 2) && (eventY <= (y + (bitmap.getWidth()) / 2))) {
setTouched(true);
pointerId = id;
}
}
错误：
07-20 18:31:06.372: E/InputEventReceiver(5089): Exception dispatching input event.
07-20 18:31:06.377: D/AndroidRuntime(5089): Shutting down VM
07-20 18:31:06.377: W/dalvikvm(5089): threadid=1: thread exiting with uncaught exception (group=0x411062a0)
07-20 18:31:06.432: E/AndroidRuntime(5089): FATAL EXCEPTION: main
07-20 18:31:06.432: E/AndroidRuntime(5089): java.lang.IllegalArgumentException: pointerIndex out of range
07-20 18:31:06.432: E/AndroidRuntime(5089): at android.view.MotionEvent.nativeGetAxisValue(Native Method)
07-20 18:31:06.432: E/AndroidRuntime(5089): at android.view.MotionEvent.getX(MotionEvent.java:2148)
07-20 18:31:06.432: E/AndroidRuntime(5089): at pl.plumber.game.MainGamePanel.onTouchEvent(MainGamePanel.java:168)
07-20 18:31:06.432: E/AndroidRuntime(5089): at android.view.View.dispatchTouchEvent(View.java:7350)
07-20 18:31:06.432: E/AndroidRuntime(5089): at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2418)
07-20 18:31:06.432: E/AndroidRuntime(5089): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2161)
07-20 18:31:06.432: E/AndroidRuntime(5089): at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2418)
07-20 18:31:06.432: E/AndroidRuntime(5089): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2161)
07-20 18:31:06.432: E/AndroidRuntime(5089): at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2418)
07-20 18:31:06.432: E/AndroidRuntime(5089): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2161)
07-20 18:31:06.432: E/AndroidRuntime(5089): at com.android.internal.policy.impl.PhoneWindow$DecorView.superDispatchTouchEvent(PhoneWindow.java:2139)
07-20 18:31:06.432: E/AndroidRuntime(5089): at com.android.internal.policy.impl.PhoneWindow.superDispatchTouchEvent(PhoneWindow.java:1476)
07-20 18:31:06.432: E/AndroidRuntime(5089): at android.app.Activity.dispatchTouchEvent(Activity.java:2487)
07-20 18:31:06.432: E/AndroidRuntime(5089): at com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchTouchEvent(PhoneWindow.java:2087)
07-20 18:31:06.432: E/AndroidRuntime(5089): at android.view.View.dispatchPointerEvent(View.java:7535)
07-20 18:31:06.432: E/AndroidRuntime(5089): at android.view.ViewRootImpl.deliverPointerEvent(ViewRootImpl.java:3415)
07-20 18:31:06.432: E/AndroidRuntime(5089): at android.view.ViewRootImpl.deliverInputEvent(ViewRootImpl.java:3347)
07-20 18:31:06.432: E/AndroidRuntime(5089): at android.view.ViewRootImpl.doProcessInputEvents(ViewRootImpl.java:4456)
07-20 18:31:06.432: E/AndroidRuntime(5089): at android.view.ViewRootImpl.enqueueInputEvent(ViewRootImpl.java:4434)
07-20 18:31:06.432: E/AndroidRuntime(5089): at android.view.ViewRootImpl$WindowInputEventReceiver.onInputEvent(ViewRootImpl.java:4538)
07-20 18:31:06.432: E/AndroidRuntime(5089): at android.view.InputEventReceiver.dispatchInputEvent(InputEventReceiver.java:171)
07-20 18:31:06.432: E/AndroidRuntime(5089): at android.view.InputEventReceiver.nativeConsumeBatchedInputEvents(Native Method)
07-20 18:31:06.432: E/AndroidRuntime(5089): at android.view.InputEventReceiver.consumeBatchedInputEvents(InputEventReceiver.java:163)
07-20 18:31:06.432: E/AndroidRuntime(5089): at android.view.ViewRootImpl.doConsumeBatchedInput(ViewRootImpl.java:4506)
07-20 18:31:06.432: E/AndroidRuntime(5089): at android.view.ViewRootImpl$ConsumeBatchedInputRunnable.run(ViewRootImpl.java:4557)
07-20 18:31:06.432: E/AndroidRuntime(5089): at android.view.Choreographer$CallbackRecord.run(Choreographer.java:725)
07-20 18:31:06.432: E/AndroidRuntime(5089): at android.view.Choreographer.doCallbacks(Choreographer.java:555)
07-20 18:31:06.432: E/AndroidRuntime(5089): at android.view.Choreographer.doFrame(Choreographer.java:523)
07-20 18:31:06.432: E/AndroidRuntime(5089): at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:711)
07-20 18:31:06.432: E/AndroidRuntime(5089): at android.os.Handler.handleCallback(Handler.java:615)
07-20 18:31:06.432: E/AndroidRuntime(5089): at android.os.Handler.dispatchMessage(Handler.java:92)
07-20 18:31:06.432: E/AndroidRuntime(5089): at android.os.Looper.loop(Looper.java:137)
07-20 18:31:06.432: E/AndroidRuntime(5089): at android.app.ActivityThread.main(ActivityThread.java:4921)
07-20 18:31:06.432: E/AndroidRuntime(5089): at java.lang.reflect.Method.invokeNative(Native Method)
07-20 18:31:06.432: E/AndroidRuntime(5089): at java.lang.reflect.Method.invoke(Method.java:511)
07-20 18:31:06.432: E/AndroidRuntime(5089): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1027)
07-20 18:31:06.432: E/AndroidRuntime(5089): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:794)
07-20 18:31:06.432: E/AndroidRuntime(5089): at dalvik.system.NativeStart.main(Native Method)
07-20 18:31:33.652: D/dalvikvm(5089): GC_CONCURRENT freed 769K, 15% free 12606K/14727K, paused 5ms+4ms, total 51ms