Android開發之requestWindowFeature(Window.FEATURE_NO_TITLE)不生效

想要隱藏ActionBar，可是requestWindowFeature(Window.FEATURE_NO_TITLE)不生效怎麼辦？android 緣由：由於本身定義的Activity繼承了android.support.v7.app.AppCompatActivity，AppCompatActivity自己不支持requestWindowFeature(Window.FEATURE_NO_T

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