如何显示在活动标题栏的加载图标？

  @覆盖
公共无效的onCreate（包冰柱）{
    super.onCreate（冰柱）;
    requestWindowFeature（Window.FEATURE_INDETERMINATE_PROGRESS）;
    的setContentView（R.layout.your_layout）;
}
 

则...在任何你想要的：

  //然后，你可以做到这一点，以显示图标
setProgressBarIndeterminateVisibility（真正的）;
//或隐藏它
setProgressBarIndeterminateVisibility（假）;
 

请务必使用 requestWindowFeature 在的setContentView 。

How do you show a loading icon in the activity titlebar?

@Override
public void onCreate(Bundle icicle) {
    super.onCreate(icicle);
    requestWindowFeature(Window.FEATURE_INDETERMINATE_PROGRESS);
    setContentView(R.layout.your_layout);
}

Then... where ever you want:

// then, you can do this to show the icon
setProgressBarIndeterminateVisibility(true);
//or to hide it
setProgressBarIndeterminateVisibility(false);

Make sure to use requestWindowFeature before setContentView.