一开始，我真的知道有不止一篇关于它的帖子，但对我修复错误/失误没有帮助。如果这是一个转发，我很抱歉，希望你们能帮助我摆脱这个错误。
11-28 17:36:36.110: W/dalvikvm(8380): threadid=1: thread exiting with uncaught exception (group=0x40a331f8)
11-28 17:36:36.110: E/AndroidRuntime(8380): FATAL EXCEPTION: main
11-28 17:36:36.110: E/AndroidRuntime(8380): java.lang.IllegalArgumentException: pointerIndex out of range
11-28 17:36:36.110: E/AndroidRuntime(8380): at android.view.MotionEvent.nativeGetAxisValue(Native Method)
11-28 17:36:36.110: E/AndroidRuntime(8380): at android.view.MotionEvent.getX(MotionEvent.java:1974)
11-28 17:36:36.110: E/AndroidRuntime(8380): at com.main.TouchEventControler.processJoyPadTouchRelease(TouchEventControler.java:194)
11-28 17:36:36.110: E/AndroidRuntime(8380): at com.main.TouchEventControler.processRelease(TouchEventControler.java:237)
11-28 17:36:36.110: E/AndroidRuntime(8380): at com.main.TouchEventControler.processTouchEvent(TouchEventControler.java:88)
11-28 17:36:36.110: E/AndroidRuntime(8380): at com.main.GameField.onTouchEvent(GameField.java:142)
11-28 17:36:36.110: E/AndroidRuntime(8380): at android.view.View.dispatchTouchEvent(View.java:5546)
11-28 17:36:36.110: E/AndroidRuntime(8380): at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:1957)
11-28 17:36:36.110: E/AndroidRuntime(8380): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1726)
11-28 17:36:36.110: E/AndroidRuntime(8380): at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:1957)
11-28 17:36:36.110: E/AndroidRuntime(8380): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1726)
11-28 17:36:36.110: E/AndroidRuntime(8380): at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:1957)
11-28 17:36:36.110: E/AndroidRuntime(8380): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1726)
11-28 17:36:36.110: E/AndroidRuntime(8380): at com.android.internal.policy.impl.PhoneWindow$DecorView.superDispatchTouchEvent(PhoneWindow.java:1938)
11-28 17:36:36.110: E/AndroidRuntime(8380): at com.android.internal.policy.impl.PhoneWindow.superDispatchTouchEvent(PhoneWindow.java:1375)
11-28 17:36:36.110: E/AndroidRuntime(8380): at android.app.Activity.dispatchTouchEvent(Activity.java:2364)
11-28 17:36:36.110: E/AndroidRuntime(8380): at com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchTouchEvent(PhoneWindow.java:1886)
11-28 17:36:36.110: E/AndroidRuntime(8380): at android.view.View.dispatchPointerEvent(View.java:5726)
11-28 17:36:36.110: E/AndroidRuntime(8380): at android.view.ViewRootImpl.deliverPointerEvent(ViewRootImpl.java:2890)
11-28 17:36:36.110: E/AndroidRuntime(8380): at android.view.ViewRootImpl.handleMessage(ViewRootImpl.java:2466)
11-28 17:36:36.110: E/AndroidRuntime(8380): at android.view.ViewRootImpl.processInputEvents(ViewRootImpl.java:845)
11-28 17:36:36.110: E/AndroidRuntime(8380): at android.view.ViewRootImpl.handleMessage(ViewRootImpl.java:2475)
11-28 17:36:36.110: E/AndroidRuntime(8380): at android.os.Handler.dispatchMessage(Handler.java:99)
11-28 17:36:36.110: E/AndroidRuntime(8380): at android.os.Looper.loop(Looper.java:137)
11-28 17:36:36.110: E/AndroidRuntime(8380): at android.app.ActivityThread.main(ActivityThread.java:4424)
11-28 17:36:36.110: E/AndroidRuntime(8380): at java.lang.reflect.Method.invokeNative(Native Method)
11-28 17:36:36.110: E/AndroidRuntime(8380): at java.lang.reflect.Method.invoke(Method.java:511)
11-28 17:36:36.110: E/AndroidRuntime(8380): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
11-28 17:36:36.110: E/AndroidRuntime(8380): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
11-28 17:36:36.110: E/AndroidRuntime(8380): at dalvik.system.NativeStart.main(Native Method)
我确实这样处理它们，我很高兴它有时会像我想要的那样运行，如果它没有因错误而崩溃：
public void processTouchEvent(MotionEvent event) {
// create an action
int action = (event.getActionMasked() & MotionEvent.ACTION_MASK);
// getting pointerindex
int pointerIndex = ((event.getAction() & MotionEvent.ACTION_POINTER_INDEX_MASK) >> MotionEvent.ACTION_POINTER_INDEX_SHIFT);
// getting pointer id
//catch invalide
if(pointerIndex == MotionEvent.INVALID_POINTER_ID){
return;
}
int pointerId = event.findPointerIndex(pointerIndex);
// switch case for the action
switch (action) {
case MotionEvent.ACTION_DOWN: // if action down
processHitButtonTouch(event, pointerId);
processJoyPadTouch(event, pointerId);
break;
case MotionEvent.ACTION_POINTER_DOWN: // if pointer down (second
// finger/third)
processHitButtonTouch(event, pointerId);
processJoyPadTouch(event, pointerId);
break;
case MotionEvent.ACTION_UP: // if action up
processRelease(event, pointerId);
case MotionEvent.ACTION_POINTER_UP: // if action up second/third finger
processRelease(event, pointerId);
default:
break;
}
}
在我调用开关的方法中，我只得到触摸的位置并处理它们。我只需要在try-catch中放入一个getX(pointerIndex)，如果出现错误则返回。但是，难道没有更好的方法吗？！
非常感谢你对我的帮助。
询问：
public void processJoyPadTouchRelease(MotionEvent event, int pointerId) {
int touchPosX = (int) event.getX(pointerId);
int touchPosY = (int) event.getY(pointerId);
if (( //dont freak out here! it's just looking for if the
//touch was inside the Joypad! Nothing more!!
//it's in breckets!
touchPosX > 2 * Config.BLOCKSIZE
&& touchPosX < 4 * Config.BLOCKSIZE
&& touchPosY > 3 * Config.BLOCKSIZE
&& touchPosY < 5 * Config.BLOCKSIZE
// touch up event handled
|| 2 * Config.BLOCKSIZE < touchPosX
&& touchPosX < (Config.BLOCKSIZE * 4)
&& touchPosY > (7 * Config.BLOCKSIZE)
&& touchPosY < (9 * Config.BLOCKSIZE)
// touch down handled
|| (touchPosX < 2 * Config.BLOCKSIZE
&& touchPosY > (5 * Config.BLOCKSIZE)
&& touchPosY < (7 * Config.BLOCKSIZE))
// touch left handled
|| (4 * Config.BLOCKSIZE < touchPosX
&& touchPosX < (Config.BLOCKSIZE * 6)
&& touchPosY > (5 * Config.BLOCKSIZE)
&& touchPosY < 7 * Config.BLOCKSIZE))
//touch right handled
//and the char isnt idle (so it's moving)
&& charac.getStatus() != Status.IDLE)
//THAN do =>>
{
charac.setStatus(Status.IDLE);
joyPad.status = Status.IDLE;
}
}
尝试确保pointerIndex < event.getPointerCount();
但我认为你可能有误解。代码中的pointerIndex是更改的指针的索引，它只能在ACTION_pointer_DOWN和ACTION_PPOINTER_UP中使用。如果屏幕上只有一根手指，则pointerIndex在此处无效。