java - Writing Background color -

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I am trying to write a background color with three sebbars. I use this code: 

  shared context mColor; Public static final string APP_PREFERENCES_COLOR = "color"; Color S = RGBTOX (R, G, B); Try {Editor Editor = mColor.edit (); Editor.putString (APP_PREFERENCES_COLOR, COLOR S); Editor.apply (); } Hold (exception e) {toast. GetApplicationContext, e. Toasting (), toast. LNNGHHORT). Show (); }}

But I can see the message "java.lang.NullPointerExeption" How can I fix this?

When you receive the editor, the shared options are zero. Try: 

  mColor = PreferenceManager.getDefaultSharedPreferences (getApplicationContext ()); Editor Editor = mColor.edit (); Editor.putString (APP_PREFERENCES_COLOR, COLOR S); Editor.commit ();

should correct your problem

Hope it helps.


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