java - 错误：“必须在添加内容之前调用 requestFeature()”，尽管它是在 setContentView() 之前调用的

Question

我有一个使用 ActionBarSherlock 的活动。现在我想在该操作栏中显示一个不确定的进度，并按照 ActionBarSherlock 中的示例进行操作：

public class MainMenu extends SimpleWebActivity implements BackgroundBrowserReciever {
    private Boolean windowFeatureCalled;


    @Override
    public void onCreate(Bundle savedInstanceState) {
        requestWindowFeature(Window.FEATURE_INDETERMINATE_PROGRESS);
        super.onCreate(savedInstanceState);

        this.windowFeatureCalled = true;
        setContentView(R.layout.main_menu);
                ....
    }

SimpleWebActivity 是扩展 SherlockActivity 的抽象类。

但是当我尝试加载该活动时，我收到以下错误：

java.lang.RuntimeException: Unable to start activity ComponentInfo{com.dalthed.tucan/com.dalthed.tucan.ui.MainMenu}: android.util.AndroidRuntimeException: requestFeature() must be called before adding content

为什么会发生此错误，即使我在调用 setContentView 之前请求了 WindowFeature？

Answer 1

在您的 Super.onCreate 之后移动它，这应该可以解决您的问题。

     @Override
        public void onCreate(Bundle savedInstanceState) {

            super.onCreate(savedInstanceState);

//HERE
 requestWindowFeature(Window.FEATURE_INDETERMINATE_PROGRESS);

            setContentView(R.layout.main_menu);
  this.windowFeatureCalled = true;
                    ....
        }

Answer 2

让我们试试这个它对我有用

@Override
    public void onCreate(Bundle savedInstanceState) {

//HERE
        requestWindowFeature(Window.FEATURE_INDETERMINATE_PROGRESS);

        super.onCreate(savedInstanceState);

        setContentView(R.layout.main_menu);

         this.windowFeatureCalled = true;
                ....
    }