Attempt to invoke virtual method 'java.lang.String java.io.File.getAbsolutePath()' on a null object reference

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Description and/or steps/code to reproduce the problem

Error on this line

        Context ctx = getApplicationContext();
  --> Configuration.getInstance().load(ctx, PreferenceManager.getDefaultSharedPreferences(ctx));

When i re-open activity

2020-08-31 19:15:00.663 29859-29859/? E/com.urban.map: Unknown bits set in runtime_flags: 0x8000
2020-08-31 19:15:12.831 29859-29859/com.urban.map E/RecyclerView: No adapter attached; skipping layout
2020-08-31 19:15:14.418 29859-29859/com.urban.map E/AndroidRuntime: FATAL EXCEPTION: main
    Process: com.urban.map, PID: 29859
    java.lang.RuntimeException: Unable to start activity ComponentInfo{com.urban.map/com.urban.map.activites.MapsActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.String java.io.File.getAbsolutePath()' on a null object reference
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3270)
        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3409)
        at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:83)
        at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:135)
        at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:95)
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2016)
        at android.os.Handler.dispatchMessage(Handler.java:107)
        at android.os.Looper.loop(Looper.java:214)
        at android.app.ActivityThread.main(ActivityThread.java:7356)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:491)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:930)
     Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.String java.io.File.getAbsolutePath()' on a null object reference
        at org.osmdroid.config.DefaultConfigurationProvider.load(DefaultConfigurationProvider.java:337)
        at com.urban.map.activites.MapsActivity.onCreate(MapsActivity.java:34)
        at android.app.Activity.performCreate(Activity.java:7824)
        at android.app.Activity.performCreate(Activity.java:7813)
        at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1307)
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3245)
        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3409) 
        at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:83) 
        at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:135) 
        at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:95) 
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2016) 
        at android.os.Handler.dispatchMessage(Handler.java:107) 
        at android.os.Looper.loop(Looper.java:214) 
        at android.app.ActivityThread.main(ActivityThread.java:7356) 
        at java.lang.reflect.Method.invoke(Native Method) 
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:491) 
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:930) 

Environment

    compileSdkVersion 29
    buildToolsVersion "29.0.2"

Version of osmdroid the issue relates to:

6.1.2

[iSergioMejia]

Hello! I don’t know if this will work for all of you but I got the same error, and in the end was because I didn’t call the setContentView(...) function in the OnCreate of my activity. Apparently there’s a connection between these two things. I hope it works for any of you.

[longGr]

Had this issue on version 6.1.8. A quick fix for me was to use osm version 6.1.4:

implementation 'org.osmdroid:osmdroid-android:6.1.4'