Question

我正在尝试制作一个drobdown导航菜单，以便我可以使用SherlockFragmentActivity和SerlockListFragment在我的页面之间移动但每次我启动我的应用程序时都会出现以下错误：

java.lang.RuntimeException：无法启动活动ComponentInfo {com.download.manager / com.download.manager.Main}：java.lang.RuntimeException：您的内容必须具有其属性为android.R的ListView。 id.list

这是SherlockFragmentActivity类

public class Main extends SherlockFragmentActivity implements OnNavigationListener{

private static final String KEY_MODELS="models";
private static final String KEY_POSITION="position";
private static final String[] labels= { "All", "Downloads","Completed","Later" };
private CharSequence[] models=new CharSequence[4];
private DownloadList frag=null;
private int lastPosition=-1;  

ActionBar act;
ViewPager myviewpager;
int mSelectedPageIndex=1;
DownloadService downloadservice;
Intent serviceIntent ;


@Override
public void onCreate(Bundle state) {
    super.onCreate(state);

    frag=(DownloadList)getSupportFragmentManager().findFragmentById(android.R.id.content);
    if (frag==null) {
        frag=new DownloadList();
        getSupportFragmentManager().beginTransaction().add(android.R.id.content, frag).commit();
      }

    if (state != null) {
        models=state.getCharSequenceArray(KEY_MODELS);
      }

    if (downloadservice==null)
        downloadservice= new DownloadService();
    ArrayAdapter<String> nav=null;
    act=getSupportActionBar();

    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.ICE_CREAM_SANDWICH)
    {
      nav= new ArrayAdapter<String>( act.getThemedContext(),android.R.layout.simple_spinner_item,labels);
    }
    else 
    {
      nav=new ArrayAdapter<String>(this,android.R.layout.simple_spinner_item,labels);
    }

    nav.setDropDownViewResource(android.R.layout.simple_list_item_1);
    act.setNavigationMode(ActionBar.NAVIGATION_MODE_LIST);
    act.setDisplayShowTitleEnabled(false);
    act.setHomeButtonEnabled(false);

    act.setListNavigationCallbacks(nav, this);
    if (state != null) {
        act.setSelectedNavigationItem(state.getInt(KEY_POSITION));
      }

    serviceIntent= new Intent(Main.this,downloadservice.getClass());
    if (startService(serviceIntent)==null)
        startService(serviceIntent);

    act.setTitle("");

}


@Override
public boolean onCreateOptionsMenu(Menu menu) {
    MenuInflater infalter = getSupportMenuInflater();
    infalter.inflate(R.menu.mymenu, menu);

    return true;
}

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    if (item.getItemId()==R.id.sub1)
    {
        AlertDialog.Builder alert = new AlertDialog.Builder(this);
        alert.setTitle("Downlaod New File");
        alert.setMessage("Enter URL");
        final EditText input = new EditText(this);
        alert.setView(input);
input.setText("http://205.196.123.184/ddpha7c5b8lg/616c36j0d1xbztf   /Lecture+ppt+Ch2.ppt");
        alert.setPositiveButton("Ok", new DialogInterface.OnClickListener() {
            public void onClick(DialogInterface dialog, int whichButton) {
                String value = input.getText().toString();
                Log.d("value",value);
            }
        });

        alert.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
            public void onClick(DialogInterface dialog, int whichButton) {
            }
        });

        alert.show();
    }   

    return super.onOptionsItemSelected(item);
}


@Override
protected void onSaveInstanceState(Bundle outState) {
    super.onSaveInstanceState(outState);

}

@Override
public boolean onNavigationItemSelected(int itemPosition, long itemId) {
    lastPosition=itemPosition;



    return false;
}

这是SherlockListFragment类

public  class DownloadList extends SherlockListFragment {
int index=0;
Button downloadButton;
Button pauseButton;
Button resumeButton;
TextView textLink;
TextView progressbar;
DownloadService downloadservice= new DownloadService();
MyAdapter listadapter;
Intent serviceIntent ;
String state;


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

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup          
 container,BundlesavedInstanceState) {
    View rootView = inflater.inflate(R.layout.downloadlist, container, false);



    return rootView;
}
int getIndex()
{
    return index;
}
public class MyAdapter extends ArrayAdapter<NewDownload>
{
     private final List<NewDownload> list;
      private final Activity context;
      Thread t;

    public MyAdapter(Context context,List<NewDownload> list) {
        super(context, R.layout.list_item,  list);
        this.context = (Activity) context;
        this.list = list;
    }
        @Override
        public View getView(int position, View convertView, ViewGroup parent) {
            LayoutInflater inflater = (LayoutInflater) getActivity().
                                          getSystemService(Context.LAYOUT_INFLATER_SERVICE);
            View row = inflater.inflate(R.layout.list_item, null);

            pauseButton = (Button) row.findViewById(R.id.btn1);
            resumeButton = (Button) row.findViewById(R.id.btn2);
            textLink = (TextView) row.findViewById(R.id.tv1);
            progressbar = (TextView) row.findViewById(R.id.progressBar1);

                  textLink.setText(downloadservice.
                                      downloads.get(position).getName());
               progressbar.setBottom(downloadservice.
                                     downloads.get(position).getDownloadedSize());
            progressbar.setTop(downloadservice.
                                      downloads.get(position).getTotalSize());

            final int p = position;
            final NewDownload r = list.get(p);
            if (r.state=="downloading")
                {
                    progressbar.setText("DownLoading...");
                    pauseButton.setEnabled(true);
                    resumeButton.setEnabled(false);
                }
            else if (r.state=="pause")
                {
                pauseButton.setEnabled(false);
                resumeButton.setEnabled(true);
                progressbar.setText(r.state);
                }
            pauseButton.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                downloadservice.pause(p);
                setListAdapter(listadapter );

                }
            });

            resumeButton.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
            if (getActivity().startService(serviceIntent)==null)

                      getActivity().startService(serviceIntent);
                downloadservice.resume(p);
                setListAdapter(listadapter );
                }
            });

            return row;
        }
}

这是downloadlist.xml

    <ListView
    android:id="@+id/list" xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content" >
</ListView>

这是list_item.XML

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >

<TextView
    android:id="@+id/tv1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_gravity="center_horizontal"
    android:text="File Name" />

<TextView
    android:id="@+id/progressBar1"

    android:layout_width="306dp"
    android:layout_height="wrap_content"
     />

<LinearLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content" >





    <Button
        android:id="@+id/btn1"
        style="?android:attr/buttonStyleSmall"
        android:layout_width="wrap_content"
        android:layout_height="34dp"
        android:layout_gravity="center_horizontal"
        android:text="Pause" />




    <Button
        android:id="@+id/btn2"
        style="?android:attr/buttonStyleSmall"
        android:layout_width="wrap_content"
        android:layout_height="34dp"
        android:layout_gravity="right"
        android:text="Resume" />

</LinearLayout>

</LinearLayout>

所以任何人都能告诉我我的错误在哪里？

Answer 1

此错误：

Your content must have a ListView whose id attribute is android.R.id.list

表示您必须使用：

<ListView
    android:id="@android:id/list"
    ...

download.xml中的

。

SherlockfragmentActivity和sherlockListFragment

1 个答案: