Description
Actual Behaviour
On going back from WaveGenerator screen the app crashes.
Expected Behaviour
App shouldn't crash
Steps to reproduce it
- Open WaveGenerator screen -> Go Back
- Open WaveGenerator screen -> Click Produce Sound -> Click Stop Sound -> Go Back
LogCat for the issue
E/AndroidRuntime: FATAL EXCEPTION: main
Process: io.pslab, PID: 27425
java.lang.NullPointerException: Attempt to invoke virtual method 'boolean io.pslab.activity.WaveGeneratorActivity$ProduceSoundTask.cancel(boolean)' on a null object reference
at io.pslab.activity.WaveGeneratorActivity.onBackPressed(WaveGeneratorActivity.java:1373)
at android.app.Activity.onKeyUp(Activity.java:3883)
at android.view.KeyEvent.dispatch(KeyEvent.java:3012)
at android.app.Activity.dispatchKeyEvent(Activity.java:4189)
at androidx.core.app.ComponentActivity.superDispatchKeyEvent(ComponentActivity.java:122)
at androidx.core.view.KeyEventDispatcher.dispatchKeyEvent(KeyEventDispatcher.java:84)
at androidx.core.app.ComponentActivity.dispatchKeyEvent(ComponentActivity.java:140)
at androidx.appcompat.app.AppCompatActivity.dispatchKeyEvent(AppCompatActivity.java:599)
at androidx.appcompat.view.WindowCallbackWrapper.dispatchKeyEvent(WindowCallbackWrapper.java:59)
at androidx.appcompat.app.AppCompatDelegateImpl$AppCompatWindowCallback.dispatchKeyEvent(AppCompatDelegateImpl.java:3068)
at androidx.appcompat.view.WindowCallbackWrapper.dispatchKeyEvent(WindowCallbackWrapper.java:59)
at com.android.internal.policy.DecorView.dispatchKeyEvent(DecorView.java:447)
at android.view.ViewRootImpl$ViewPostImeInputStage.processKeyEvent(ViewRootImpl.java:6439)
at android.view.ViewRootImpl$ViewPostImeInputStage.onProcess(ViewRootImpl.java:6295)
at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:5760)
at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:5827)
at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:5788)
at android.view.ViewRootImpl$AsyncInputStage.forward(ViewRootImpl.java:5950)
at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:5796)
at android.view.ViewRootImpl$AsyncInputStage.apply(ViewRootImpl.java:6007)
at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:5764)
at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:5827)
at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:5788)
at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:5796)
at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:5764)
at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:5827)
at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:5788)
at android.view.ViewRootImpl$AsyncInputStage.forward(ViewRootImpl.java:5983)
at android.view.ViewRootImpl$ImeInputStage.onFinishedInputEvent(ViewRootImpl.java:6148)
at android.view.inputmethod.InputMethodManager$PendingEvent.run(InputMethodManager.java:3395)
at android.view.inputmethod.InputMethodManager.invokeFinishedInputEventCallback(InputMethodManager.java:2937)
at android.view.inputmethod.InputMethodManager.finishedInputEvent(InputMethodManager.java:2928)
at android.view.inputmethod.InputMethodManager$ImeInputEventSender.onInputEventFinished(InputMethodManager.java:3372)
at android.view.InputEventSender.dispatchInputEventFinished(InputEventSender.java:143)
at android.os.MessageQueue.nativePollOnce(Native Method)
at android.os.MessageQueue.next(MessageQueue.java:339)
at android.os.Looper.loop(Looper.java:208)
at android.app.ActivityThread.main(ActivityThread.java:8218)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:626)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1015)
Screenshots of the issue
WhatsApp.Video.2021-10-28.at.15.29.14.mp4
Would you like to work on the issue?
Yes