java.lang.NullPointerException: Attempt to invoke virtual method 'int android.view.ViewGroup.getPaddingLeft()' on a null object reference
15,724
You need to call super.onCreate()
first to preform any necessary initializations to the Activity before you set it's view. Simply flip those two lines:
super.onCreate(savedInstanceState);
setContentView(R.layout.itemactivity); // this is where error occurs
For more information on what this method's doing, check out this answer.
Author by
alireza_fn
Updated on June 09, 2022Comments
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alireza_fn almost 2 years
I'm trying to use an Intent to start an Activity, but the mentioned error occurs on second activity's setContentView();
Here are my code and the layout file.
itemactivity.xml:
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_height="match_parent" android:layout_width="match_parent" android:orientation="vertical"> </LinearLayout>
MainActivity:
Intent i=new Intent(MainActivity.this,ItemActivity.class); startActivity(i);
ItemActivity:
@Override protected void onCreate(Bundle savedInstanceState) { setContentView(R.layout.itemactivity); // this is where error occurs super.onCreate(savedInstanceState); }
Here is complete error log:
java.lang.RuntimeException: Unable to start activity ComponentInfo{bertaberim.team.beertaberim/bertaberim.team.beertaberim.ItemActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'int android.view.ViewGroup.getPaddingLeft()' on a null object reference 11-04 23:01:20.621 20634-20634/? E/AndroidRuntime: at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3119) 11-04 23:01:20.621 20634-20634/? E/AndroidRuntime: at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3218) 11-04 23:01:20.621 20634-20634/? E/AndroidRuntime: at android.app.ActivityThread.access$1000(ActivityThread.java:198) 11-04 23:01:20.621 20634-20634/? E/AndroidRuntime: at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1676) 11-04 23:01:20.621 20634-20634/? E/AndroidRuntime: at android.os.Handler.dispatchMessage(Handler.java:102) 11-04 23:01:20.621 20634-20634/? E/AndroidRuntime: at android.os.Looper.loop(Looper.java:145) 11-04 23:01:20.621 20634-20634/? E/AndroidRuntime: at android.app.ActivityThread.main(ActivityThread.java:6837) 11-04 23:01:20.621 20634-20634/? E/AndroidRuntime: at java.lang.reflect.Method.invoke(Native Method) 11-04 23:01:20.621 20634-20634/? E/AndroidRuntime: at java.lang.reflect.Method.invoke(Method.java:372) 11-04 23:01:20.621 20634-20634/? E/AndroidRuntime: at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1404) 11-04 23:01:20.621 20634-20634/? E/AndroidRuntime: at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1199)