bug: Android crashes when calling exitApp();

Bug Report

Capacitor Version

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Latest Dependencies:

  @capacitor/cli: 2.4.0
  @capacitor/core: 2.4.0
  @capacitor/android: 2.4.0
  @capacitor/electron: 2.4.0
  @capacitor/ios: 2.4.0

Installed Dependencies:

  @capacitor/ios not installed
  @capacitor/cli 2.4.0
  @capacitor/core 2.4.0
  @capacitor/android 2.4.0
  @capacitor/electron not installed

[success] Android looking great! 👌

Platform(s)

Android

Current Behavior

I wanted to implement the ‘close app on native back button’ feature. When I call the exitApp() method the app closes and crashes. The app is still in the list of apps running in the background, but when the user re-opens the app the splash screen is shown and the app boots freshly.

Debugger output:

Expected Behavior

I’d expect the app to not crash. It should pause in the background and resume when re-opened. (Just like it was with Cordova in the past).

Code Reproduction

    if (!this.platform.is('android')) {
      return;
    }

    this.platform.backButton.subscribeWithPriority(1, () => {
      if (!this.routerOutlet.canGoBack()) {
        App.exitApp();
      }
    });

I’ve also created a minimal demo app, which reproduces the issue: https://github.com/burningparrot/ionic-exit-app-crash-demo

Reproduction steps:

1.) clone the repo above 2.) ionic cap open android 3.) run the app in debug mode on a physical device 4.) push the device’s native back button to close the app 5.) Carefully observe the debugger output on android studio 6.) re-open the app from the background

[jcesarmobile]

I’ve tested on 3 different devices and I can’t reproduce the crash, and by the message it looks like a chrome bug, not a Capacitor bug.

App.exitApp(); kills the app activity, it does exactly the same as Cordova’s navigator.app.exitApp();. After calling any of them the app’s activity is killed, and if you open it again, it will reload the whole app, not resume it. It remains in “recent items”, but that doesn’t mean it’s backgrounded, recent items shows any app that was recently closed. If you don’t want the app to appear when it has been closed you can add android:autoRemoveFromRecents="true" to the activity tag in AndroidManifest.xml.

[ionitron-bot[bot]]

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