如何在同一個標​​籤中開始新活動？

Question

我有2個選項卡，名爲：Tab1，Tab2
class MainActivity擴展TabActivity。
MainActivity.java

public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.main); 
    mTabHost = getTabHost(); 
    Intent intentTab; 
    intentTab = new Intent().setClass(this, Tab1Activity.class); 
    mTabHost.addTab(mTabHost.newTabSpec("tab_1").setIndicator("Tab1") 
      .setContent(intentTab)); 

    intentTab = new Intent().setClass(this, Tab2Activity.class); 
    mTabHost.addTab(mTabHost.newTabSpec("tab_2").setIndicator("Tab2") 
      .setContent(intentTab)); 



    mTabHost.setCurrentTab(0); 

main.xml中

<TabHost xmlns:android="http://schemas.android.com/apk/res/android" 
android:id="@android:id/tabhost" 
android:layout_width="fill_parent" 
android:layout_height="fill_parent" > 

    <LinearLayout 
    android:layout_width="fill_parent" 
    android:layout_height="fill_parent" 
    android:orientation="vertical" 
    android:padding="5dp" > 

    <FrameLayout 
     android:id="@android:id/tabcontent" 
     android:layout_width="fill_parent" 
     android:layout_height="wrap_content" 
     android:layout_weight="1" 
     android:padding="5dp" > 
    </FrameLayout> 

    <TabWidget 
     android:id="@android:id/tabs" 
     android:layout_width="fill_parent" 
     android:layout_height="wrap_content" 
     android:layout_marginBottom="-4dp" 
     android:layout_weight="0" /> 
</LinearLayout> 

Tab1Activity延伸ListActvity其解析JSON並列出結果在列表視圖。 在單擊列表視圖中的項目時，我想在同一個選項卡即Tab-1中啓動新的活動。
我該怎麼做？
Tab1Activity.java

public class Tab1Activity extends ListActivity { 

public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.tab1); 

    // Hashmap for ListView 
    ArrayList<HashMap<String, String>> myList = new ArrayList<HashMap<String,  String>>(); 

    // Creating JSON Parser instance 
    JSONParser jParser = new JSONParser(); 

    // getting JSON string from URL 
    JSONObject json = jParser.getJSONFromUrl(url); 

    try { 
     // Getting Array of Root 
     root = json.getJSONArray(TAG_ROOT); 

     // looping through All root 
     for (int i = 0; i < root.length(); i++) { 
      JSONObject c = root.getJSONObject(i); 

      // Storing each json item in variable 

      String name = c.getString(TAG_NAME); 
      String town = c.getString(TAG_TOWN); 
      String totalRating = c.getString(TAG_TOTALRATING); 

      // creating new HashMap 
      HashMap<String, String> map = new HashMap<String, String>(); 

      // adding each child node to HashMap key => value 

      map.put(TAG_NAME, "Name: " + name); 
      map.put(TAG_TOWN, "Town: " + town); 
      map.put(TAG_RATING, "Rating: " + totalRating); 

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

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

    /** 
    * Updating parsed JSON data into ListView 
    * */ 
    ListAdapter adapter = new SimpleAdapter(this, myList, 
      R.layout.list_item, new String[] { TAG_NAME, TAG_TOWN, 
        TAG_RATING }, new int[] { R.id.name, R.id.address, 
        R.id.rating }); 

    setListAdapter(adapter); 

    // selecting single ListView item 
    ListView lv = getListView(); 

    // Launching new screen on Selecting Single ListItem 
    lv.setOnItemClickListener(new OnItemClickListener() { 

     public void onItemClick(AdapterView<?> parent, View view, 
       int position, long id) { 
      //what code should i write to start new activity in this tab i.e Tab1 
     } 

    }); 

} 

}

在這裏，在上面的代碼：

// Launching new screen on Selecting Single ListItem 
    lv.setOnItemClickListener(new OnItemClickListener() { 

     public void onItemClick(AdapterView<?> parent, View view, 
       int position, long id) { 
      //what code should i write to start new activity in this tab i.e Tab1 
     } 

    }); 

我應該在這個ItemClickListener寫什麼代碼，在此選項卡即標籤 - 開始新的活動1

tab1.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    android:layout_width="fill_parent" 
    android:layout_height="fill_parent" 
    android:background="@drawable/background" 
    android:orientation="vertical" > 


    <ListView 
    android:id="@id/android:list" 
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    android:layout_weight="1" 
    android:choiceMode="singleChoice" 
    android:drawSelectorOnTop="true" 
    android:focusable="true" 
    android:focusableInTouchMode="true" 
    android:scrollbars="vertical" /> 

</LinearLayout> 

list_item.xml

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



    <TextView 
     android:id="@+id/name" 
     android:layout_width="fill_parent" 
     android:layout_height="wrap_content" 
     android:paddingBottom="2dip" 
     android:paddingTop="6dip" 
     android:textColor="#43bd00" 
     android:textSize="16sp" 
     android:textStyle="bold" /> 

    <TextView 
     android:id="@+id/town" 
     android:layout_width="fill_parent" 
     android:layout_height="wrap_content" 
     android:paddingBottom="2dip" 
     android:textColor="#acacac" > 
    </TextView> 

    <TextView 
     android:id="@+id/rating" 
     android:layout_width="fill_parent" 
     android:layout_height="wrap_content" 
     android:paddingBottom="2dip" 
     android:textColor="#acacac" > 
    </TextView> 
</LinearLayout> 

感謝名單！

Answer 1

讓你的活動被用作製表符片段的內容。片段可能有自己的背靠背。

見鏈接：

http://android.codeandmagic.org/2011/07/android-tabs-with-fragments/