替Activity屏幕的标题添加图标

为Activity屏幕的标题添加图标

@Override  public void onCreate(Bundle icicle) {      super.onCreate(icicle);            Window win = getWindow();      win.requestFeature(Window.FEATURE_LEFT_ICON);            setContentView(R.layout.mylayout);            win.setFeatureDrawableResource(Window.FEATURE_LEFT_ICON, R.drawable.icon);        }