导航抽屉，ListView项目不显示

Question

我尝试使用NavigationDrawer进行新闻体育应用。但是当我打开应用程序时，我想显示WebView，然后从左到后显示ListView。我做了一些事情，但现在ListView没有显示这些项目。我有4个班级和2个xml。

package com.baronescu.sportsnews2;

import android.os.Bundle;
import android.app.Activity;
import android.app.Fragment;
import android.app.FragmentManager;
import android.content.Intent;
import android.support.v4.widget.DrawerLayout;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ArrayAdapter;
import android.widget.ListView;

public class MainActivity extends Activity {
       String[] menu;
       DrawerLayout dLayout;
       ListView dList;
       ArrayAdapter<String> adapter;
  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);





        menu = new String[]{"Football","Tennis","Basketball","Hockey","Handball"};
        dLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
        dList = (ListView) findViewById(R.id.left_drawer);
        adapter = new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1,menu);
        dList.setAdapter(adapter);
        dList.setSelector(android.R.color.holo_blue_dark);
        dList.setOnItemClickListener(new OnItemClickListener(){
      @Override
      public void onItemClick(AdapterView<?> arg0, View v, int position, long id) {
        dLayout.closeDrawers();
        Bundle args = new Bundle();
        args.putString("Menu", menu[position]);
        Fragment detail = new DetailFragment();
        detail.setArguments(args);
          FragmentManager fragmentManager = getFragmentManager();
        fragmentManager.beginTransaction().replace(R.id.dfurl, detail).commit();
      }
        });


        Thread timer = new Thread(){
            public void run (){
                try {
                    sleep(2000);                        
                } catch (InterruptedException e ){
                    e.printStackTrace();
                } finally {
                    Intent odu = new Intent ("com.baronescu.sportsnews2.DEFAULTURL");
                    startActivity(odu);

                }   
            }
        };
        timer.start();  




  }

  @Override
    protected void onPause() {
        // TODO Auto-generated method stub
        super.onPause();
        finish();
    }
}



package com.baronescu.sportsnews2;

import android.app.Fragment;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;
public class DetailFragment extends Fragment {
    TextView text;
    @Override
    public View onCreateView(LayoutInflater inflater,ViewGroup container, Bundle args) {
        View view = inflater.inflate(R.layout.menu_detail_fragment, container, false);
        String menu = getArguments().getString("Menu");
        text= (TextView) view.findViewById(R.id.detail);
        text.setText(menu);
        return view;
    }
}


package com.baronescu.sportsnews2;

import android.app.Activity;
import android.os.Bundle;
import android.webkit.WebView;
import com.baronescu.sportsnews2.OurViewClient;



public class DefaultUrl extends Activity {

    WebView firstnews;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        // TODO Auto-generated method stub
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        firstnews = (WebView) findViewById(R.id.dfurl);
        firstnews.setWebViewClient(new OurViewClient());

        firstnews.getSettings().setJavaScriptEnabled(true);
        firstnews.getSettings().setLoadWithOverviewMode(true);
        firstnews.getSettings().setUseWideViewPort(true);
        try {
            firstnews.loadUrl("http://www.digisport.ro");
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

}


package com.baronescu.sportsnews2;

import android.webkit.WebView;
import android.webkit.WebViewClient;

public class OurViewClient extends WebViewClient {

    @Override
    public boolean shouldOverrideUrlLoading(WebView v, String url) {
        // TODO Auto-generated method stub
        v.loadUrl(url);
        return true;
    }

}






<android.support.v4.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/drawer_layout"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@drawable/sportsnews" >

    <!-- android:id="@+id/content_frame" -->
    <!-- android:layout_width="match_parent" -->
    <!-- android:layout_height="match_parent" > -->

    <WebView
        android:id="@+id/dfurl"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />

    <ListView
        android:id="@+id/left_drawer"
        android:layout_width="240dp"
        android:layout_height="match_parent"
        android:layout_gravity="start"
        android:background="#111"
        android:choiceMode="singleChoice"
        android:divider="@android:color/transparent"
        android:dividerHeight="0dp" />

</android.support.v4.widget.DrawerLayout>



<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:gravity="center"
    android:orientation="vertical" >

    <TextView
        android:id="@+id/detail"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:textColor="#ffffff"
        android:textSize="40px" />

    </LinearLayout>

的manifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.baronescu.sportsnews2"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="10" />
    <uses-permission android:name="android.permission.INTERNET"/>

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name=".MainActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>

        <activity
            android:name=".DefaultUrl"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="com.baronescu.sportsnews2.DEFAULTURL" />

                <category android:name="android.intent.category.DEFAULT" />
            </intent-filter>
        </activity>

    </application>

</manifest>