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Hi currently i am working on project including parse server,and after adding parse library to my project ,when i run it it shows this error ( java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.myapplicationv/com.example.myapplicationv.MainActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'java.io.File com.parse.ParsePlugins.getParseDir()' on a null object reference at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2646) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2707) at android.app.ActivityThread.-wrap12(ActivityThread.java) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1460) at android.os.Handler.dispatchMessage(Handler.java:102) at android.os.Looper.loop(Looper.java:154) at android.app.ActivityThread.main(ActivityThread.java:6077) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:866) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:756) Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'java.io.File com.parse.ParsePlugins.getParseDir()' on a null object reference at com.parse.Parse.getParseDir(Parse.java:509) at com.parse.ParseCorePlugins.getCurrentUserController(ParseCorePlugins.java:130) at com.parse.ParseUser.getCurrentUserController(ParseUser.java:55) at com.parse.ParseUser.getCurrentUserAsync(ParseUser.java:883) at com.parse.ParseObject.saveInBackground(ParseObject.java:1405) at com.parse.ParseObject.saveInBackground(ParseObject.java:1529) at com.example.myapplicationv.MainActivity.onCreate(MainActivity.java:22) at android.app.Activity.performCreate(Activity.java:6662) at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1118) at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2599) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2707)  at android.app.ActivityThread.-wrap12(ActivityThread.java)  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1460)  at android.os.Handler.dispatchMessage(Handler.java:102)  at android.os.Looper.loop(Looper.java:154)  at android.app.ActivityThread.main(ActivityThread.java:6077)  at java.lang.reflect.Method.invoke(Native Method)  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:866)  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:756)  )

this is MainActivity here

MainActivity package com.example.myapplicationv; import android.os.Bundle; import android.util.Log; import androidx.appcompat.app.AppCompatActivity; import com.parse.ParseAnalytics; import com.parse.ParseException; import com.parse.ParseObject; import com.parse.SaveCallback; public class MainActivity extends AppCompatActivity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); ParseObject score = new ParseObject("Score"); score.put("username","Nalin"); score.put("score",200); score.saveInBackground(new SaveCallback() { @Override public void done(ParseException e) { if (e == null){ Log.i("success","we save the score"); }else{ e.printStackTrace(); } } }); ParseAnalytics.trackAppOpenedInBackground(getIntent()); } }

StarterApplication

 package com.example.myapplicationv; import android.os.Bundle; import androidx.appcompat.app.AppCompatActivity; import com.parse.Parse; import com.parse.ParseACL; import com.parse.ParseUser; public class StarterApplication extends AppCompatActivity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); //setContentView(R.layout.activity_starter_application); Parse.enableLocalDatastore(this); Parse.initialize(new Parse.Configuration.Builder(getApplicationContext()) .applicationId("myappID") .clientKey("nV48GY6ZE5Lw") .server("http://18.217.199.68/parse/") .build() ); ParseUser.enableAutomaticUser(); ParseACL defaultACL = new ParseACL(); defaultACL.setPublicReadAccess(true); defaultACL.setPublicWriteAccess(true); ParseACL.setDefaultACL(defaultACL, true); } }
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  • Instead of posting the code photo please post the code Commented Apr 25, 2020 at 10:06
  • i have added the code .. Commented Apr 25, 2020 at 10:14

1 Answer 1

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You need to initialize the parser in the application class as explained in document here. Also should declare it in the Manifest file.

The problem that I encounter was that the Document that shows to Use a class App extending Application was never initialized even after adding the activity in Manifest(it gives a red line also). So what I did was I saved the below code in the onCreate of my SplashActivity

Parse.initialize(new Parse.Configuration.Builder(this) .applicationId(getString(R.string.back4app_app_id)) // if defined .clientKey(getString(R.string.back4app_client_key)) .server(getString(R.string.back4app_server_url)) .enableLocalDataStore() // <--- This is important .build());

Now After this I'm able to use it normally.

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2 Comments

i have already declare it in the manifest file
i have initialized as explaind in document but it still shows same error

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