7
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Android Studio will run fine without it, but if the warning concerns you, you can create the file ~/.android/repositories.cfg with the following content and the warning will not appear again.
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public class MainActivity extends Activity { ActionBar actionBar; //声明ActionBar @Override protected void onCreate( Bundle savedInstanceState) { super .onCreate(savedInstanceState); setContentView( R .layout.activity_main); actionBar = getSupportActionBar(); //得 到ActionBar actionBar.hide(); //隐藏ActionBar } }
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