Exception in the Android's code while starting the app

Question

In the "Crashes and ANRs" of the Google Play Developer console I've got such a report:

java.lang.NullPointerException: Attempt to invoke virtual method 'android.content.res.AssetManager android.content.res.Resources.getAssets()' on a null object reference
at android.app.LoadedApk.getAssets(LoadedApk.java:590)
at android.app.LoadedApk.makeApplication(LoadedApk.java:646)
at android.app.ActivityThread.handleBindApplication(ActivityThread.java:5088)
at android.app.ActivityThread.access$1600(ActivityThread.java:177)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1509)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:145)
at android.app.ActivityThread.main(ActivityThread.java:5944)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1389)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1184)

The device that has this problem is Galaxy S4 and runs Android 5.0

What it can be - there is not a single line from my code, why does it fail?

Thanks a lot!

But your app runs normally on your device/the devices of most of your users? — Anubian Noob
– Anubian Noob, Commented Jul 15, 2015 at 19:22
Yes. But I've deployed it to production recently, so there is not much statistics. — sberezin
– sberezin, Commented Jul 15, 2015 at 19:23
I experienced this too, and this happened quite often. getAssets() is not from our code, it is from OS's code. Most likely it is this bug: code.google.com/p/android/issues/detail?id=56296. Star that in order to get more attention. — Randy Sugianto 'Yuku'
– Randy Sugianto 'Yuku', Commented Nov 3, 2015 at 2:46

Simon · Accepted Answer · 2017-06-06 09:48:57Z

4

I've got this in my console too. It seems this occurs when users start the app when it's currently being updated or just after that.

A possible workaround would be to check if getResources returns null when the application start, and kill it if it does:

public class DevToolsApplication extends Application { 
    private static final String TAG = "DevToolsApplication"; 

    @Override 
    public void onCreate() { 
        super.onCreate(); 
        AppLogger.i(TAG, "app start..."); 
        checkAppReplacingState(); 
    } 

    private void checkAppReplacingState() { 
        if (getResources() == null) { 
            AppLogger.w(TAG, "app is replacing...kill"); 
            Process.killProcess(Process.myPid()); 
        } 
    } 
}

See this for more information https://issuetracker.google.com/issues/36972466

answered Jun 6, 2017 at 9:48

Simon

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Matt Clark · Accepted Answer · 2015-07-15 19:28:08Z

1

Make sure that anywhere you call getAssets(), you call it as:

getApplicationContext().getAssets()

It would appear as if you are calling getAssets() in a class that does not have the application context available, hence the fact that it is null.

answered Jul 15, 2015 at 19:28

Matt Clark

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1 Comment

sberezin Over a year ago

Thanks for your suggestion but I don't call to getAssets() anywhere. By the way - assets folder of my app is empty.

Trendy · Accepted Answer · 2019-09-17 07:02:37Z

0

I've got the same exception while added the below overlay in the AndroidManifest.xml file. Even after removing the Overlay code, landed into the above exception.

<overlay android:targetPackage="com.android.systemui"
             android:priority="1"/>

Just close the Android Studio completely. Open the project again. Clean and Build the exception got cleared.

answered Sep 17, 2019 at 7:02

Trendy

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