java.lang.NullPointerException

Attempt to invoke interface method 'int android.app.FragmentManager$BackStackEntry.getId()' on a null object reference


Solutions on the web21593

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Attempt to invoke interface method 'int android.app.FragmentManager$BackStackEntry.getId()' on a null object reference

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Attempt to invoke virtual method 'android.app.FragmentManager android.app.Activity.getFragmentManager()' on a null object reference

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Attempt to invoke interface method 'int com.google.android.exoplayer.upstream.UriDataSource.read(byte[], int, int)' on a null object reference

Solution icon of github
Attempt to invoke interface method 'void com.afollestad.materialdialogssample.ColorChooserDialog$Callback.onColorSelection(int, int, int)' on a null object reference

Solution icon of web
via 4pda.ru by Unknown author, 1 year ago
Attempt to invoke interface method 'int android.app.IActivityManager.checkPermission(java.lang.String, int, int)' on a null object reference

Solution icon of web
via xda-developers.com by Unknown author, 1 year ago
Attempt to invoke interface method 'int android.app.IActivityManager.checkPermission(java.lang.String, int, int)' on a null object reference

Solution icon of stackoverflow
via Stack Overflow by Sharanabasu Angadi
, 1 year ago
Attempt to invoke interface method 'void android.text.TextWatcher.beforeTextChanged(java.lang.CharSequence, int, int, int)' on a null object reference

Solution icon of stackoverflow
via Stack Overflow by Coelacanth
, 11 months ago
Attempt to invoke interface method 'void android.text.TextWatcher.beforeTextChanged(java.lang.CharSequence, int, int, int)' on a null object reference

Solution icon of github
Attempt to invoke interface method 'int android.app.IActivityManager.checkPermission(java.lang.String, int, int)' on a null object reference

Solution icon of github
Attempt to invoke interface method 'int android.text.Spanned.nextSpanTransition(int, int, java.lang.Class)' on a null object reference

Stack trace

  • java.lang.NullPointerException: Attempt to invoke interface method 'int android.app.FragmentManager$BackStackEntry.getId()' on a null object reference at co5025.example.com.week10.MainActivity.onClick(MainActivity.java:52) at android.view.View.performClick(View.java:5610) at android.view.View$PerformClick.run(View.java:22260) at android.os.Handler.handleCallback(Handler.java:751) at android.os.Handler.dispatchMessage(Handler.java:95) 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:865) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:755)

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