java Android：在 TabHost 活动中显示不确定的进度条
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Android: Showing indeterminate progress bar in TabHost activity
提问by MattC
I know that the following code should show and hide a tiny circular progress bar with the following code in Android:
我知道下面的代码应该在 Android 中显示和隐藏一个带有以下代码的小圆形进度条：
requestWindowFeature(Window.FEATURE_INDETERMINATE_PROGRESS);
setProgressBarIndeterminateVisibility(true);
setProgressBarIndeterminateVisibility(false);
The problem is that I am using a TabHost and I need to be able to do this from one of the "child" activities. Is there any way I can go about doing this?
问题是我使用的是 TabHost，我需要能够从“子”活动之一中做到这一点。有什么办法可以做这件事吗？
I found this questionon the intarwebs but as you can see, it went unanswered.
我在 intarwebs 上发现了这个问题，但正如你所看到的，它没有得到解答。
采纳答案by MattC
And I found the answer. In your parent activity, before you do anything, you need to do the requestWindowFeature call, and then in your child activity you call getParent().setProgressBarIndeterminateVisibility(true/false);
我找到了答案。在你的父活动中，在你做任何事情之前，你需要做 requestWindowFeature 调用，然后在你的子活动中调用getParent().setProgressBarIndeterminateVisibility(true/false);
回答by droidgren
Just for completeness:
只是为了完整性：
If the task is running in a different thread other than Main ui thread, you can do:
如果任务在 Main ui 线程以外的其他线程中运行，您可以执行以下操作：
this.runOnUiThread(new Runnable() {
public void run() {
getParent().setProgressBarIndeterminateVisibility(mToggleIndeterminate);
}
});
