titlebar 标题栏显示进度条

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

然后你可任意调用

setProgressBarIndeterminateVisibility(true);

setProgressBarIndeterminateVisibility(false);