Question

在我的app类中，ProjectFragActivtiy遇到了像

这样的异常

java.lang.ClassCastException: com.actionbarsherlock.internal.view.menu.MenuBuilder 
at com.oj.bs.ProjectFragActivity.onCreateOptionsMenu
(ProjectFragActivity.java:49).

应用菜单按钮中的

用于注销操作但遇到异常。还有另一种方法可以在actionbarsherlock中实现菜单。有人有解决方案吗？提前谢谢。

以下是ProjectFragActivtiy类

    package com.oj.bs;

import android.os.Bundle;
import android.view.View;
import android.widget.Toast;

import com.actionbarsherlock.app.ActionBar;
import com.actionbarsherlock.app.ActionBar.Tab;
import com.actionbarsherlock.app.SherlockFragmentActivity;
import com.actionbarsherlock.view.Menu;

public class ProjectFragActivity extends SherlockFragmentActivity {

    SessionManager sessionMngr ;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        sessionMngr = new SessionManager(getApplicationContext());

        Toast.makeText(getApplicationContext(), "User Login Status: " + sessionMngr .isLoggedIn(), 
                Toast.LENGTH_LONG).show();
        sessionMngr.checkLogin();

        ActionBar actionBar = getSupportActionBar();
        actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
        actionBar.setDisplayShowTitleEnabled(true);

        Tab tab = actionBar.newTab().
                setText("Residential").
                setTabListener(new ResidentialFragActivity()).
                setIcon(R.drawable.residential);
        actionBar.addTab(tab);

        tab = actionBar.newTab().
              setText("Commercial").
              setTabListener(new  CommercialFragActivity()).
              setIcon(R.drawable.commercial);

        actionBar.addTab(tab);

    }
    public void Logout(View v) {
        sessionMngr.logoutUser();
    }
    @Override
    public boolean onCreateOptionsMenu(Menu m) {
        getMenuInflater().inflate(R.menu.menu_logout, (android.view.Menu) m);
        return true;
    }

}

Answer 1

按如下所示更改onCreateOptionsMenu()

@Override
public boolean onCreateOptionsMenu(Menu menu) {
   com.actionbarsherlock.view.MenuInflater inflater = getSupportMenuInflater();
   inflater.inflate(R.menu.menu_logout, (com.actionbarsherlock.view.Menu) menu);
   return true;
}

注意：

要从XML中扩充菜单，您应该在活动中调用getSupportMenuInflater()。片段回调已经将inflater的一个实例作为参数。

使用上下文菜单时android：ClassCastException？

1 个答案: