Thank you for your response and sorry for a late reply. I tried copying the code from @akenaton and changed the problem with @Override and imported EditText which you mentioned but it won’t run on my tablet.
This is the error:
FATAL EXCEPTION: main
Process: processing.test.keyboardtest, PID: 31610
java.lang.RuntimeException: Unable to start activity ComponentInfo{processing.test.keyboardtest/processing.test.keyboardtest.MainActivity}: java.lang.NullPointerException: Attempt to invoke virtual method ‘void android.view.ViewGroup.addView(android.view.View)’ on a null object reference
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2984)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3045)
at android.app.ActivityThread.-wrap14(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1642)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6776)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1496)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1386)
Caused by: java.lang.NullPointerException: Attempt to invoke virtual method ‘void android.view.ViewGroup.addView(android.view.View)’ on a null object reference
at processing.test.keyboardtest.KeyboardTest.onStart(KeyboardTest.java:71)
at processing.android.PFragment.onStart(PFragment.java:168)
at android.support.v4.app.Fragment.performStart(Fragment.java:2369)
at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1458)
at android.support.v4.app.FragmentManagerImpl.moveFragmentToExpectedState(FragmentManager.java:1740)
at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1809)
at android.support.v4.app.FragmentManagerImpl.dispatchStateChange(FragmentManager.java:3217)
at android.support.v4.app.FragmentManagerImpl.dispatchStart(FragmentManager.java:3176)
at android.support.v4.app.FragmentController.dispatchStart(FragmentController.java:203)
at android.support.v4.app.FragmentActivity.onStart(FragmentActivity.java:562)
at android.support.v7.app.AppCompatActivity.onStart(AppCompatActivity.java:177)
at android.app.Instrumentation.callActivityOnStart(Instrumentation.java:1256)
at android.app.Activity.performStart(Activity.java:6972)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2937)
… 9 more
Would you know why this happens?