In the beginning i define three integers
public static int button1, buttoncos, buttonmadd;
Then i store the value of drawables in them
case R.id.blue:
for (Button currentButton : buttons) {
currentButton.setBackgroundResource(R.drawable.blue);
button1 = buttoncos = buttonmadd = R.drawable.blue;
};
return true;
Then in onDestroy()
and onPause()
, I write following code
@Override
protected void onDestroy() {
// TODO Auto-generated method stub
super.onDestroy();
editor = preferences.edit();
editor.putInt("DigitButtonStyle",button1);
editor.putInt("MemoryButtonStyle", buttonmadd);
editor.putInt("FunctionButtonStyle", buttoncos);
editor.commit();
}
@Override
protected void onPause() {
// TODO Auto-generated method stub
super.onDestroy();
editor = preferences.edit();
editor.putInt("DigitButtonStyle",button1);
editor.putInt("MemoryButtonStyle", buttonmadd);
editor.putInt("FunctionButtonStyle", buttoncos);
editor.commit();
}
I write nothing in onStart()
.
Then in onCreate()
method, I write following code:
for (Button currentButton : digitbuttons) {
currentButton.setBackgroundResource(button1);
}
for (Button currentButton : memoryfunctions) {
currentButton.setBackgroundResource(buttonmadd);
}
for (Button currentButton : functionbuttons) {
currentButton.setBackgroundResource(buttoncos);
}
}
preferences = PreferenceManager.getDefaultSharedPreferences(this);
After i run my application and change themes my app crashes. Here is my logcat:
03-17 23:53:38.033: E/AndroidRuntime(15638): FATAL EXCEPTION: main
03-17 23:53:38.033: E/AndroidRuntime(15638): java.lang.RuntimeException: Unable to stop activity {com.example.calculator/com.example.calculator.MainActivity}: java.lang.IllegalStateException: No activity
03-17 23:53:38.033: E/AndroidRuntime(15638): at android.app.ActivityThread.performDestroyActivity(ActivityThread.java:3625)
03-17 23:53:38.033: E/AndroidRuntime(15638): at android.app.ActivityThread.handleDestroyActivity(ActivityThread.java:3679)
03-17 23:53:38.033: E/AndroidRuntime(15638): at android.app.ActivityThread.access$1200(ActivityThread.java:162)
03-17 23:53:38.033: E/AndroidRuntime(15638): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1417)
03-17 23:53:38.033: E/AndroidRuntime(15638): at android.os.Handler.dispatchMessage(Handler.java:107)
03-17 23:53:38.033: E/AndroidRuntime(15638): at android.os.Looper.loop(Looper.java:194)
03-17 23:53:38.033: E/AndroidRuntime(15638): at android.app.ActivityThread.main(ActivityThread.java:5371)
03-17 23:53:38.033: E/AndroidRuntime(15638): at java.lang.reflect.Method.invokeNative(Native Method)
03-17 23:53:38.033: E/AndroidRuntime(15638): at java.lang.reflect.Method.invoke(Method.java:525)
03-17 23:53:38.033: E/AndroidRuntime(15638): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:833)
03-17 23:53:38.033: E/AndroidRuntime(15638): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:600)
03-17 23:53:38.033: E/AndroidRuntime(15638): at dalvik.system.NativeStart.main(Native Method)
03-17 23:53:38.033: E/AndroidRuntime(15638): Caused by: java.lang.IllegalStateException: No activity
03-17 23:53:38.033: E/AndroidRuntime(15638): at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1091)
03-17 23:53:38.033: E/AndroidRuntime(15638): at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1086)
03-17 23:53:38.033: E/AndroidRuntime(15638): at android.support.v4.app.FragmentManagerImpl.dispatchStop(FragmentManager.java:1907)
03-17 23:53:38.033: E/AndroidRuntime(15638): at android.support.v4.app.FragmentActivity.onStop(FragmentActivity.java:612)
03-17 23:53:38.033: E/AndroidRuntime(15638): at android.support.v7.app.ActionBarActivity.onStop(ActionBarActivity.java:109)
03-17 23:53:38.033: E/AndroidRuntime(15638): at android.app.Instrumentation.callActivityOnStop(Instrumentation.java:1211)
03-17 23:53:38.033: E/AndroidRuntime(15638): at android.app.Activity.performStop(Activity.java:5264)
03-17 23:53:38.033: E/AndroidRuntime(15638): at android.app.ActivityThread.performDestroyActivity(ActivityThread.java:3620)
03-17 23:53:38.033: E/AndroidRuntime(15638): ... 11 more
Why am i getting this error.