可擴展列表視圖指示器未在右側設置

Question

我想設置默認情況下出現在左側的指示器圖標，應顯示在右側。 我曾嘗試所有技術，我發現谷歌，但它似乎有些事情是我的expandablelistview或有其他的方式來做到這一點， 我試過了： explistobj.setInicatorBounds（...）不工作:( 添加屬性的XML 機器人：indicatorLeft = 「250dp」 機器人：indicatorRight = 「300dp」 沒有工作:(

代碼：

public class MainActivity extends Activity { 

     ExpandableListAdapter listAdapter; 
     ExpandableListView expListView; 
     List<String> listDataHeader; 
     HashMap<String, List<String>> listDataChild; 

     @Override 
     protected void onCreate(Bundle savedInstanceState) { 
      super.onCreate(savedInstanceState); 
      setContentView(R.layout.activity_main); 

      // get the listview 
      expListView = (ExpandableListView) findViewById(R.id.lvExp); 

      // preparing list data 
      prepareListData(); 
      setDimens(); 

      listAdapter = new ExpandableListAdapter(this, listDataHeader, listDataChild); 

      // setting list adapter 
      expListView.setAdapter(listAdapter); 

      // Listview Group click listener 
      expListView.setOnGroupClickListener(new OnGroupClickListener() { 

       @Override 
       public boolean onGroupClick(ExpandableListView parent, View v, 
         int groupPosition, long id) { 
        // Toast.makeText(getApplicationContext(), 
        // "Group Clicked " + listDataHeader.get(groupPosition), 
        // Toast.LENGTH_SHORT).show(); 
        return false; 
       } 
      }); 

      // Listview Group expanded listener 
      expListView.setOnGroupExpandListener(new OnGroupExpandListener() { 

       @Override 
       public void onGroupExpand(int groupPosition) { 
        Toast.makeText(getApplicationContext(), 
          listDataHeader.get(groupPosition) + " Expanded", 
          Toast.LENGTH_SHORT).show(); 
       } 
      }); 

      // Listview Group collasped listener 
      expListView.setOnGroupCollapseListener(new OnGroupCollapseListener() { 

       @Override 
       public void onGroupCollapse(int groupPosition) { 
        Toast.makeText(getApplicationContext(), 
          listDataHeader.get(groupPosition) + " Collapsed", 
          Toast.LENGTH_SHORT).show(); 

       } 
      }); 

      // Listview on child click listener 
      expListView.setOnChildClickListener(new OnChildClickListener() { 

       @Override 
       public boolean onChildClick(ExpandableListView parent, View v, 
         int groupPosition, int childPosition, long id) { 
        // TODO Auto-generated method stub 
        Toast.makeText(
          getApplicationContext(), 
          listDataHeader.get(groupPosition) 
            + " : " 
            + listDataChild.get(
              listDataHeader.get(groupPosition)).get(
              childPosition), Toast.LENGTH_SHORT) 
          .show(); 
        return false; 
       } 
      }); 
     } 

     /* 
     * Preparing the list data 
     */ 
     private void prepareListData() { 
      listDataHeader = new ArrayList<String>(); 
      listDataChild = new HashMap<String, List<String>>(); 

      // Adding child data 
      listDataHeader.add("mylist0"); 
      listDataHeader.add("mylist1"); 
      listDataHeader.add("mylist2"); 

      // Adding child data 
      List<String> top250 = new ArrayList<String>(); 
      mylist0.add("item1"); 
      mylist0.add("item2"); 
      mylist0.add("item3"); 

      List<String> mylist1 = new ArrayList<String>(); 
       mylist1.add("Item1"); 
      mylist1.add("Item2"); 
      mylist1.add("Item3"); 
      mylist1.add("Item4"); 
      mylist1.add("Item5"); 
      mylist1.add("Item6"); 

      List<String> mylist2 = new ArrayList<String>(); 
      mylist2.add("item1"); 


      listDataChild.put(listDataHeader.get(0), mylist0); // Header, Child data 
      listDataChild.put(listDataHeader.get(1), mylist1); 
      listDataChild.put(listDataHeader.get(2), mylist2); 
     } 
     public int GetDipsFromPixel(float pixels) 
     { 
       // Get the screen's density scale 
       final float scale = getResources().getDisplayMetrics().density; 
       // Convert the dps to pixels, based on density scale 
       return (int) (pixels * scale + 0.5f); 
     } 

     public void setDimens() 
     { 
      Display display = getWindowManager().getDefaultDisplay(); 
      Point size = new Point(); 
      display.getSize(size); 
      int width = size.x; 
      int height = size.y; 
      Display display2 = getWindowManager().getDefaultDisplay(); 
      int width2 = display2.getWidth(); // deprecated 
      int height2 = display2.getHeight(); // deprecated 
      //expListView.setIndicatorBounds(width2-GetDipsFromPixel(35), width2-GetDipsFromPixel(5)); //not works 
      expListView.setIndicatorBounds(expListView.getRight()- 40, expListView.getWidth()); //not works 

     } 
    } 

xml code: 
<?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="fill_parent" 
    android:orientation="vertical" 
    android:background="#f4f4f4" > 

      <ExpandableListView 
       android:id="@+id/lvExp" 
       android:layout_height="match_parent" 
       android:layout_width="match_parent" 
       android:cacheColorHint="#00000000" 
       <!-- 
       android:indicatorLeft="250dp" 
       android:indicatorRight="300dp"       
       --> 
      /> 

</LinearLayout> 

Answer 1

請試試這個，這是我工作的情況 這是xml編碼的可擴展列表視圖 layout.xml

<ExpandableListView 
    android:id="@+id/expandableListView1" 
    android:layout_width="match_parent" 
    android:layout_height="wrap_content" 
    android:layout_alignParentLeft="true" 
    android:layout_marginTop="50dp" 
    android:groupIndicator="@drawable/group_indicator" 
    android:cacheColorHint="#00000000" 
    android:childDivider="@android:color/transparent" 
    android:divider="#d4d4d4" 
    android:dividerHeight="1dp" 
    android:scrollbars="vertical|horizontal" > 
</ExpandableListView> 

group_indicator.xml

<?xml version="1.0" encoding="utf-8"?> 

<item android:drawable="@drawable/arrow_right" android:state_empty="true"></item> 
<item android:drawable="@drawable/arrow_down" android:state_expanded="true"></item> 
<item android:drawable="@drawable/arrow_right"></item> 

然後在Java文件的代碼。 expandableExample.jav

DisplayMetrics metrics = new DisplayMetrics(); 
    getWindowManager().getDefaultDisplay().getMetrics(metrics); 
    int width = metrics.widthPixels; 
    if(android.os.Build.VERSION.SDK_INT < android.os.Build.VERSION_CODES.JELLY_BEAN_MR2) { 
     expandableListView.setIndicatorBounds(width - GetPixelFromDips(50), width - GetPixelFromDips(10)); 
     searchExpListView.setIndicatorBounds(width - GetPixelFromDips(50), width - GetPixelFromDips(10)); 
    } else { 
     expandableListView.setIndicatorBoundsRelative(width - GetPixelFromDips(50), width - GetPixelFromDips(10)); 
     searchExpListView.setIndicatorBoundsRelative(width - GetPixelFromDips(50), width - GetPixelFromDips(10)); 
    } 

public int GetPixelFromDips(float pixels) { 
    // Get the screen's density scale 
    final float scale = getResources().getDisplayMetrics().density; 
    // Convert the dps to pixels, based on density scale 
    return (int) (pixels * scale + 0.5f); 
} 

它是在可擴展列表視圖右側的指示器完整的代碼。

現在有相同的好庫。如果你想使用recyclerview並且想爲這樣的事情使用自定義視圖，請使用也可以解釋可擴展示例的小組庫。 groupie。這個庫是需要android數據綁定的。處理recyclerview中的多個視圖並具有可擴展功能。