LibGdx Android游戏在恢复时使用奇怪的键码崩溃（1026）

Question

Our LibGdx project crashes on resume, when running on android.

The following trace shows what went wrong. But cannot figure out what to do about the problem.

01-11 18:37:43.643  17046-17046/com.mojo.rainbowrun.android D/AndroidRuntime﹕ Shutting down VM
01-11 18:37:43.643  17046-17046/com.mojo.rainbowrun.android W/dalvikvm﹕ threadid=1: thread exiting with uncaught exception (group=0x41675d88)
01-11 18:37:43.643  17046-17046/com.mojo.rainbowrun.android E/AndroidRuntime﹕ FATAL EXCEPTION: main
    Process: com.mojo.rainbowrun.android, PID: 17046
    java.lang.ArrayIndexOutOfBoundsException: length=256; index=1026
            at com.badlogic.gdx.backends.android.AndroidInput.onKey(AndroidInput.java:561)
            at android.view.View.dispatchKeyEvent(View.java:7791)
            at android.view.ViewGroup.dispatchKeyEvent(ViewGroup.java:1408)
            at android.view.ViewGroup.dispatchKeyEvent(ViewGroup.java:1408)
            at android.view.ViewGroup.dispatchKeyEvent(ViewGroup.java:1408)
            at com.android.internal.policy.impl.PhoneWindow$DecorView.superDispatchKeyEvent(PhoneWindow.java:2042)
            at com.android.internal.policy.impl.PhoneWindow.superDispatchKeyEvent(PhoneWindow.java:1512)
            at android.app.Activity.dispatchKeyEvent(Activity.java:2418)
            at com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchKeyEvent(PhoneWindow.java:1969)
            at android.view.ViewRootImpl$ViewPostImeInputStage.processKeyEvent(ViewRootImpl.java:3852)
            at android.view.ViewRootImpl$ViewPostImeInputStage.onProcess(ViewRootImpl.java:3826)
            at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:3399)
            at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:3449)
            at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:3418)
            at android.view.ViewRootImpl$AsyncInputStage.forward(ViewRootImpl.java:3525)
            at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:3426)
            at android.view.ViewRootImpl$AsyncInputStage.apply(ViewRootImpl.java:3582)
            at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:3399)
            at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:3449)
            at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:3418)
            at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:3426)
            at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:3399)
            at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:3449)
            at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:3418)
            at android.view.ViewRootImpl$AsyncInputStage.forward(ViewRootImpl.java:3558)
            at android.view.ViewRootImpl$ImeInputStage.onFinishedInputEvent(ViewRootImpl.java:3718)
            at android.view.inputmethod.InputMethodManager$PendingEvent.run(InputMethodManager.java:2087)
            at android.view.inputmethod.InputMethodManager.invokeFinishedInputEventCallback(InputMethodManager.java:1781)
            at android.view.inputmethod.InputMethodManager.finishedInputEvent(InputMethodManager.java:1772)
            at android.view.inputmethod.InputMethodManager$ImeInputEventSender.onInputEventFinished(InputMethodManager.java:2064)
            at android.view.InputEventSender.dispatchInputEventFinished(InputEventSender.java:141)
            at android.os.MessageQueue.nativePollOnce(Native Method)
            at android.os.MessageQueue.next(MessageQueue.java:138)
            at android.os.Looper.loop(Looper.java:196)
            at android.app.ActivityThread.main(ActivityThread.java:5137)
            at java.lang.reflect.Method.invokeNative(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:515)
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:902)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:718)
            at dalvik.system.NativeStart.main(Native Method)

Here is a code snippet around line 561 of AndroidInput.java :

            if (keyCode == Keys.BUTTON_CIRCLE) {
                if (keys[Keys.BUTTON_CIRCLE]) {
                    keyCount--;
                    keys[Keys.BUTTON_CIRCLE] = false;
                }
            } else {
                if (keys[e.getKeyCode()]) { // Line 561
                    keyCount--;
                    keys[e.getKeyCode()] = false;
            }

The keys array has 256 entries, so Libgdx isn't expecting a keycode as large as 1026.

Answer 1

In Line 561, the if statement has an array, and when the if statement codition executes, You are getting the keycode as the index variable which can lead to an array out of bounds like the Logcat says. If this what it causes the problem, Try changing it and sees if it solves the problem.

The if statement in line 561 executes with the else statement. If the first if is false . Verify if you can change your code in that line and see if this is what really causing your crash, I don't know what e object means because you dind't posted what is his job in your code.