Android Kotlin - 捕获的异常仍然使程序崩溃
Android Kotlin - caught exception still crashes program
代码:
viewModel.saveLayer.observeNonNull(this) {
Log.i(TAG, "save layer")
try {
// starting to record takes longer than stopping. so, if timed right, a recorder could be stopped
// before started.
with(mediaRecorder) {
stop()
reset()
}
sharedPrefs.updateNumSavedLayers(it)
viewModel.updateNumSavedLayers(it)
} catch(e: Exception) {
Log.e(TAG,"could not save layer", e)
}
}
仍然抛出崩溃。见下文:
2019-02-20 19:45:22.514 22435-22435/com.xxx.xxx E/PedalApp: could not save layer
java.lang.RuntimeException: stop failed.
at android.media.MediaRecorder.stop(Native Method)
at com.androidchekhov.looperpedal.PedalActivity$onCreate.invoke(PedalActivity.kt:92)
at com.androidchekhov.looperpedal.PedalActivity$onCreate.invoke(PedalActivity.kt:17)
at com.androidchekhov.looperpedal.ExtensionsKt$observeNonNull.onChanged(Extensions.kt:9)
at android.arch.lifecycle.LiveData.considerNotify(LiveData.java:109)
at android.arch.lifecycle.LiveData.dispatchingValue(LiveData.java:126)
at android.arch.lifecycle.LiveData.setValue(LiveData.java:282)
at android.arch.lifecycle.MutableLiveData.setValue(MutableLiveData.java:33)
at com.xxx.xxx.PedalViewModel.pedalClick(PedalViewModel.kt:47)
at com.androidchekhov.looperpedal.PedalActivity$onCreate.invoke(PedalActivity.kt:137)
at com.androidchekhov.looperpedal.PedalActivity$onCreate.invoke(PedalActivity.kt:17)
at com.androidchekhov.looperpedal.OnPedalTouchListener.handleClick(OnPedalListener.kt:80)
at com.androidchekhov.looperpedal.OnPedalTouchListener.onTouch(OnPedalListener.kt:41)
at android.view.View.dispatchTouchEvent(View.java:11775)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2971)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2600)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2971)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2600)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2971)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2600)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2971)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2600)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2971)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2600)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2971)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2600)
at com.android.internal.policy.DecorView.superDispatchTouchEvent(DecorView.java:448)
at com.android.internal.policy.PhoneWindow.superDispatchTouchEvent(PhoneWindow.java:1834)
at android.app.Activity.dispatchTouchEvent(Activity.java:3312)
at android.support.v7.view.WindowCallbackWrapper.dispatchTouchEvent(WindowCallbackWrapper.java:69)
at com.android.internal.policy.DecorView.dispatchTouchEvent(DecorView.java:410)
at android.view.View.dispatchPointerEvent(View.java:12018)
at android.view.ViewRootImpl$ViewPostImeInputStage.processPointerEvent(ViewRootImpl.java:4829)
at android.view.ViewRootImpl$ViewPostImeInputStage.onProcess(ViewRootImpl.java:4643)
at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:4181)
at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:4234)
at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:4200)
at android.view.ViewRootImpl$AsyncInputStage.forward(ViewRootImpl.java:4327)
at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:4208)
at android.view.ViewRootImpl$AsyncInputStage.apply(ViewRootImpl.java:4384)
at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:4181)
at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:4234)
at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:4200)
at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:4208)
at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:4181)
at android.view.ViewRootImpl.deliverInputEvent(ViewRootImpl.java:6755)
at android.view.ViewRootImpl.doProcessInputEvents(ViewRootImpl.java:6694)
at android.view.ViewRootImpl.enqueueInputEvent(ViewRootImpl.java:6655)
at android.view.ViewRootImpl$WindowInputEventReceiver.onInputEvent(ViewRootImpl.java:6858)
at android.view.InputEventReceiver.dispatchInputEvent(InputEventReceiver.java:193
at android.os.MessageQueue.nativePollOnce(Native Method)
不确定我是否误解了您的问题,但以下行表明您看到的异常是由您自己的代码打印的:
Log.e(TAG,"could not save layer", e)
如果您向 Log.e
命令提供例外,它会与您的消息一起打印(请参阅 documentation):
Send a ERROR log message and log the exception.
请注意,您的消息 "could not save layer" 也会显示。所以你只看到打印的堆栈跟踪,但异常被正确捕获,因此 not 不会使你的应用程序崩溃。也许后续问题是崩溃的原因。
请 (1) 提供有关该应用程序的更多上下文,以及 (2) 检查您是否可以分享其他崩溃指示器,例如 logcat。根据您提供的信息,我假设还有另一次崩溃导致应用程序崩溃。
代码:
viewModel.saveLayer.observeNonNull(this) { Log.i(TAG, "save layer") try { // starting to record takes longer than stopping. so, if timed right, a recorder could be stopped // before started. with(mediaRecorder) { stop() reset() } sharedPrefs.updateNumSavedLayers(it) viewModel.updateNumSavedLayers(it) } catch(e: Exception) { Log.e(TAG,"could not save layer", e) } }
仍然抛出崩溃。见下文:
2019-02-20 19:45:22.514 22435-22435/com.xxx.xxx E/PedalApp: could not save layer java.lang.RuntimeException: stop failed. at android.media.MediaRecorder.stop(Native Method) at com.androidchekhov.looperpedal.PedalActivity$onCreate.invoke(PedalActivity.kt:92) at com.androidchekhov.looperpedal.PedalActivity$onCreate.invoke(PedalActivity.kt:17) at com.androidchekhov.looperpedal.ExtensionsKt$observeNonNull.onChanged(Extensions.kt:9) at android.arch.lifecycle.LiveData.considerNotify(LiveData.java:109) at android.arch.lifecycle.LiveData.dispatchingValue(LiveData.java:126) at android.arch.lifecycle.LiveData.setValue(LiveData.java:282) at android.arch.lifecycle.MutableLiveData.setValue(MutableLiveData.java:33) at com.xxx.xxx.PedalViewModel.pedalClick(PedalViewModel.kt:47) at com.androidchekhov.looperpedal.PedalActivity$onCreate.invoke(PedalActivity.kt:137) at com.androidchekhov.looperpedal.PedalActivity$onCreate.invoke(PedalActivity.kt:17) at com.androidchekhov.looperpedal.OnPedalTouchListener.handleClick(OnPedalListener.kt:80) at com.androidchekhov.looperpedal.OnPedalTouchListener.onTouch(OnPedalListener.kt:41) at android.view.View.dispatchTouchEvent(View.java:11775) at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2971) at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2600) at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2971) at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2600) at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2971) at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2600) at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2971) at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2600) at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2971) at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2600) at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2971) at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2600) at com.android.internal.policy.DecorView.superDispatchTouchEvent(DecorView.java:448) at com.android.internal.policy.PhoneWindow.superDispatchTouchEvent(PhoneWindow.java:1834) at android.app.Activity.dispatchTouchEvent(Activity.java:3312) at android.support.v7.view.WindowCallbackWrapper.dispatchTouchEvent(WindowCallbackWrapper.java:69) at com.android.internal.policy.DecorView.dispatchTouchEvent(DecorView.java:410) at android.view.View.dispatchPointerEvent(View.java:12018) at android.view.ViewRootImpl$ViewPostImeInputStage.processPointerEvent(ViewRootImpl.java:4829) at android.view.ViewRootImpl$ViewPostImeInputStage.onProcess(ViewRootImpl.java:4643) at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:4181) at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:4234) at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:4200) at android.view.ViewRootImpl$AsyncInputStage.forward(ViewRootImpl.java:4327) at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:4208) at android.view.ViewRootImpl$AsyncInputStage.apply(ViewRootImpl.java:4384) at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:4181) at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:4234) at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:4200) at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:4208) at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:4181) at android.view.ViewRootImpl.deliverInputEvent(ViewRootImpl.java:6755) at android.view.ViewRootImpl.doProcessInputEvents(ViewRootImpl.java:6694) at android.view.ViewRootImpl.enqueueInputEvent(ViewRootImpl.java:6655) at android.view.ViewRootImpl$WindowInputEventReceiver.onInputEvent(ViewRootImpl.java:6858) at android.view.InputEventReceiver.dispatchInputEvent(InputEventReceiver.java:193 at android.os.MessageQueue.nativePollOnce(Native Method)
不确定我是否误解了您的问题,但以下行表明您看到的异常是由您自己的代码打印的:
Log.e(TAG,"could not save layer", e)
如果您向 Log.e
命令提供例外,它会与您的消息一起打印(请参阅 documentation):
Send a ERROR log message and log the exception.
请注意,您的消息 "could not save layer" 也会显示。所以你只看到打印的堆栈跟踪,但异常被正确捕获,因此 not 不会使你的应用程序崩溃。也许后续问题是崩溃的原因。
请 (1) 提供有关该应用程序的更多上下文,以及 (2) 检查您是否可以分享其他崩溃指示器,例如 logcat。根据您提供的信息,我假设还有另一次崩溃导致应用程序崩溃。