（AS笔记）Android隐藏自带标题栏——代码方式

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        requestWindowFeature(Window.FEATURE_NO_TITLE);

        setContentView(R.layout.activity_main);

        if (getSupportActionBar()!=null){
            getSupportActionBar().hide();
        }
    }
}