如何將ListActivity類提取到SherlockFragment中

我對Android和Java非常陌生。按照AndroidBegin's教程，我使用SherlockFragment創建了3個選項卡。我試圖做的是當我點擊時將通知流入第一個選項卡。流通知的顯示由ListView顯示。我創建了一個名爲StreamNotices.java的類，它運行良好。我的問題是，當我按下'Tab 1'時，如何獲取/調用此課程並加載我的內容？如何將ListActivity類提取到SherlockFragment中

ETA：如果你能明確告訴我應該放哪裏，因爲我對我應該放置代碼的地方非常無知。

幫助將是偉大的！

MainActivity.java

public class MainActivity extends SherlockFragmentActivity { 
// Declare Variables  
private FragmentTabHost mTabHost; 




@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    // Set the view from main_fragment.xml 
    setContentView(R.layout.main_fragment); 

    // Locate android.R.id.tabhost in main_fragment.xml 
    mTabHost = (FragmentTabHost) findViewById(android.R.id.tabhost); 

    // Create the tabs in main_fragment.xml 
    mTabHost.setup(this, getSupportFragmentManager(), R.id.tabcontent); 

    // Create Tab1 with a custom image in res folder 
    mTabHost.addTab(mTabHost.newTabSpec("tab1").setIndicator("", getResources().getDrawable(R.drawable.tab1)), 
      FragmentTab1.class, null); 

    // Create Tab2 
    mTabHost.addTab(mTabHost.newTabSpec("tab2").setIndicator("Tab2"), 
      FragmentTab2.class, null); 

    // Create Tab3 
    mTabHost.addTab(mTabHost.newTabSpec("tab3").setIndicator("Tab3"), 
      FragmentTab3.class, null); 
}

}

FragmentTab1.java

public class FragmentTab1 extends SherlockFragment { 
@Override 
public View onCreateView(LayoutInflater inflater, ViewGroup container, 
     Bundle savedInstanceState) { 
    View rootView = inflater.inflate(R.layout.fragmenttab1, container, false); 
    return rootView; 
}

}

StreamNotices.java（樣品從mybringback.com代碼）

public class StreamNotices extends ListActivity { 

// Progress Dialog 
private ProgressDialog pDialog; 

..... 

// JSON IDS: 
private static final String TAG_NOTICE = "notice"; 
private static final String TAG_ANNOUNCEMENTID = "announcementid"; 
private static final String TAG_DEPTNO = "deptno"; 
private static final String TAG_MODULEID = "moduleid"; 
private static final String TAG_SUBJECT = "subject"; 
private static final String TAG_MESSAGE = "message"; 
private static final String TAG_SUCCESS = "success"; 
// it's important to note that the message is both in the parent branch of 
// our JSON tree that displays a "Post Available" or a "No Post Available" 
// message, 
// and there is also a message for each individual post, listed under the 
// "posts" 
// category, that displays what the user typed as their message. 

// An array of all of our comments 
private JSONArray mComments = null; 

// manages all of our comments in a list. 
private ArrayList<HashMap<String, String>> mCommentList; 

@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    // note that use read_comments.xml instead of our single_post.xml 
    setContentView(R.layout.announcements); 
} 

@Override 
protected void onResume() { 
    // TODO Auto-generated method stub 
    super.onResume(); 
    // loading the comments via AsyncTask 
    new LoadComments().execute(); 
} 


/** 
* Retrieves recent post data from the server. 
*/ 
public void updateJSONdata() { 

    // Instantiate the arraylist to contain all the JSON data. 
    // we are going to use a bunch of key-value pairs, referring 
    // to the json element name, and the content, for example, 
    // message it the tag, and "I'm awesome" as the content.. 

    mCommentList = new ArrayList<HashMap<String, String>>(); 

    // Bro, it's time to power up the J parser 
    JSONParser jParser = new JSONParser(); 
    // Feed the beast our comments url, and it spits us 
    // back a JSON object. Boo-yeah Jerome. 
    JSONObject json = jParser.getJSONFromUrl(READ_COMMENTS_URL); 

    // when parsing JSON stuff, we should probably 
    // try to catch any exceptions: 
    try { 

     // I know I said we would check if "Posts were Avail." (success==1) 
     // before we tried to read the individual posts, but I lied... 
     // mComments will tell us how many "posts" or comments are 
     // available 
     mComments = json.getJSONArray(TAG_NOTICE); 

     // looping through all posts according to the json object returned 
     for (int i = 0; i < mComments.length(); i++) { 
      JSONObject c = mComments.getJSONObject(i); 

      // gets the content of each tag 
     String id = c.getString(TAG_ANNOUNCEMENTID); 
        String name = c.getString(TAG_DEPTNO); 
        String module = c.getString(TAG_MODULEID); 
        String title = c.getString(TAG_SUBJECT); 
        String content = c.getString(TAG_MESSAGE); 
      // creating new HashMap 
      HashMap<String, String> map = new HashMap<String, String>(); 

        map.put(TAG_ANNOUNCEMENTID, id); 
        map.put(TAG_DEPTNO, name); 
        map.put(TAG_MODULEID, module); 
        map.put(TAG_SUBJECT, title); 
        map.put(TAG_MESSAGE, content); 

      // adding HashList to ArrayList 
      mCommentList.add(map); 

      // annndddd, our JSON data is up to date same with our array 
      // list 
     } 

    } catch (JSONException e) { 
     e.printStackTrace(); 
    } 
} 

/** 
* Inserts the parsed data into the listview. 
*/ 
private void updateList() { 
    // For a ListActivity we need to set the List Adapter, and in order to do 
    //that, we need to create a ListAdapter. This SimpleAdapter, 
    //will utilize our updated Hashmapped ArrayList, 
    //use our single_post xml template for each item in our list, 
    //and place the appropriate info from the list to the 
    //correct GUI id. Order is important here. 
    ListAdapter adapter = new SimpleAdapter(this, mCommentList, 
      R.layout.single_post, new String[] { TAG_ANNOUNCEMENTID, 
          TAG_DEPTNO, TAG_MODULEID, TAG_SUBJECT, TAG_MESSAGE}, 
        new int[] { R.id.announcementid, R.id.deptno, R.id.moduleid, 
        R.id.subject, R.id.message }); 

    // I shouldn't have to comment on this one: 
    setListAdapter(adapter); 

    // Optional: when the user clicks a list item we 
    //could do something. However, we will choose 
    //to do nothing... 
    ListView lv = getListView();  
    lv.setOnItemClickListener(new OnItemClickListener() { 

     @Override 
     public void onItemClick(AdapterView<?> parent, View view, 
       int position, long id) { 

      // This method is triggered if an item is click within our 
      // list. For our example we won't be using this, but 
      // it is useful to know in real life applications. 

     } 
    }); 
} 

public class LoadComments extends AsyncTask<Void, Void, Boolean> { 

    @Override 
    protected void onPreExecute() { 
     super.onPreExecute(); 
     pDialog = new ProgressDialog(StreamNotices.this); 
     pDialog.setMessage("Loading Comments..."); 
     pDialog.setIndeterminate(false); 
     pDialog.setCancelable(true); 
     pDialog.show(); 
    } 

    @Override 
    protected Boolean doInBackground(Void... arg0) { 
     updateJSONdata(); 
     return null; 

    } 

    @Override 
    protected void onPostExecute(Boolean result) { 
     super.onPostExecute(result); 
     pDialog.dismiss(); 
     updateList(); 
    } 
}

}

我的XML文件：

announcements.xml

<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
android:orientation="vertical" 
android:layout_width="fill_parent" 
android:layout_height="match_parent" 
android:background="#fff" > 
<TextView 
     android:id="@+id/app_name_text" 
     style="@style/BlackText" 
     android:layout_height="wrap_content" 
     android:layout_gravity="center" 
     android:gravity="center" 
     android:text="@string/read_notices_title" 
     android:textAppearance="?android:attr/textAppearanceLarge" /> 

<ListView 
    android:id="@android:id/list" 
    android:layout_width="300dp" 
    android:layout_height="wrap_content" 
    android:layout_gravity="center" 
    android:background="#fff" 
    android:divider="@android:color/transparent" 
    android:dividerHeight="10dp" 
    android:scrollbars="vertical" 
    android:textColor="#000" > 

</ListView></LinearLayout>

single_post.xml（通知將涌入公告前流在這裏）

enter code here<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
android:layout_width="fill_parent" 
android:layout_height="wrap_content" 
android:background="@drawable/roundback" 
android:paddingLeft="10dp" 
android:paddingBottom="10dp" 
android:paddingTop="10dp" 
android:orientation="vertical" > 

<!-- Announcement id layout --> 
<LinearLayout 
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    android:orientation="horizontal"> 


      <TextView 
       android:id="@+id/announcementid" 
       android:layout_width="wrap_content" 
       android:layout_height="wrap_content" 
       android:layout_gravity="left" 
       android:textColor="#333" 
       android:textStyle="bold" 
       android:visibility="gone"/> 
      </LinearLayout> 

    <!-- date layout --> 
<LinearLayout 
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    android:orientation="horizontal"> 
     <TextView 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:textColor="#5d5d5d" 
     android:gravity="right" 
     android:textStyle="bold" 
     android:text="@string/posted_date" > 
     </TextView> 

      <TextView 
       android:id="@+id/posted_date" 
       android:layout_width="wrap_content" 
       android:layout_height="wrap_content" 
       android:layout_gravity="right" 
       android:textColor="#333" 
       android:textStyle="bold" /> 
      </LinearLayout> 


      <!-- Dept ID --> 
      <LinearLayout 
      android:layout_width="fill_parent" 
      android:layout_height="wrap_content" 
      android:orientation="horizontal"> 

       <TextView 
       android:layout_width="wrap_content" 
       android:layout_height="wrap_content" 
       android:textColor="#5d5d5d" 
       android:gravity="left" 
       android:textStyle="bold" 
       android:text="@string/deptid" /> 

       <TextView 
        android:id="@+id/deptno" 
        android:layout_width="wrap_content" 
        android:layout_height="wrap_content" 
        android:gravity="left" 
        android:textColor="#acacac" 
        android:textStyle="bold" > 
       </TextView> 
      </LinearLayout> 

      <!-- Module id --> 


      <LinearLayout 
      android:layout_width="fill_parent" 
      android:layout_height="wrap_content" 
      android:orientation="horizontal"> 
       <TextView 
       android:layout_width="wrap_content" 
       android:layout_height="wrap_content" 
       android:textColor="#5d5d5d" 
       android:gravity="left" 
       android:textStyle="bold" 
       android:text="@string/mid" /> 

       <TextView 
        android:id="@+id/moduleid" 
        android:layout_width="wrap_content" 
        android:layout_height="wrap_content" 
        android:gravity="left" 
        android:textColor="#acacac" 
        android:textStyle="bold" > 
       </TextView> 
     </LinearLayout> 

      <!-- subject --> 
      <LinearLayout 
       android:layout_width="fill_parent" 
       android:layout_height="wrap_content" 
       android:orientation="horizontal"> 

        <TextView 
        android:layout_width="wrap_content" 
        android:layout_height="wrap_content" 
        android:textColor="#5d5d5d" 
        android:gravity="left" 
        android:textStyle="bold" 
        android:text="@string/subj" /> 

        <TextView 
        android:id="@+id/subject" 
        android:layout_width="wrap_content" 
        android:layout_height="wrap_content" 
        android:gravity="left" 
        android:textColor="#acacac" 
        android:textStyle="bold" > 
       </TextView> 
      </LinearLayout>  

     <!-- message --> 
      <LinearLayout 
       android:layout_width="fill_parent" 
       android:layout_height="wrap_content" 
       android:orientation="horizontal"> 


      <TextView 
       android:id="@+id/message" 
       android:layout_width="wrap_content" 
       android:layout_height="wrap_content" 
       android:paddingBottom="2dip" 
       android:paddingLeft="8dp" 
       android:textColor="#888" > 
      </TextView> 

      </LinearLayout> 

    </LinearLayout>

來源

2013-08-03 Arastal

在選項卡onClick（）如果您使用android.support.v.4。庫

FragmentTransaction fTrans = getSupportFragmentManager().beginTransaction(); 
    fTrans.add(R.id.frame_layout_inActivity_class, new Fragment()); 
    fTrans.commit();

，或者如果你不使用它

FragmentTransaction fTrans = getFragmentManager().beginTransaction(); 
    fTrans.add(R.id.frame_layout_inActivity_class, new Fragment()); 
    fTrans.commit();

來源

2013-08-03 10:38:31

嗨，我應該在哪裏放置標籤的onClick（）？我很抱歉，但你能更具體嗎？我對Java也沒有任何先驗知識...... – Arastal

如何將ListActivity類提取到SherlockFragment中

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