android可擴展列表視圖不滾動

我想實現可擴展列表視圖。列表展開後，它不再可滾動。標題被誤放了。android可擴展列表視圖不滾動

這裏是我的主要活動的lisltview佈局：

<RelativeLayout 
     android:layout_width="match_parent" 
     android:layout_height="100dp" 
     android:layout_below="@+id/dashboard_scrollview"> 
     <ExpandableListView 
      android:id="@+id/leaderboard_list_view" 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content" 
      android:layout_marginLeft="10dp" 
      android:layout_marginRight="10dp" 
      android:transcriptMode="alwaysScroll" /> 
    </RelativeLayout>

和列表視圖被點擊之後，它擴大但無法滾動：

我想知道爲什麼標題和第一個元素沒有顯示在列表視圖中。

MainActivity：

public void setupLeaderboardListView(){ 

     leaderboardDetail = ExpandableLeaderboardData.getData(); 
     leaderboardListView.setStackFromBottom(true); 
     leaderboardtitle = new ArrayList<String>(leaderboardDetail.keySet()); 
     leaderboardAdapter = new LeaderboardAdapter(this, leaderboardtitle, leaderboardDetail); 
     leaderboardListView.setAdapter(leaderboardAdapter); 
     leaderboardListView.setOnGroupExpandListener(new ExpandableListView.OnGroupExpandListener() { 

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

     leaderboardListView.setOnGroupCollapseListener(new ExpandableListView.OnGroupCollapseListener() { 

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

      } 
     }); 

     leaderboardListView.setOnChildClickListener(new ExpandableListView.OnChildClickListener() { 
      @Override 
      public boolean onChildClick(ExpandableListView parent, View v, 
             int groupPosition, int childPosition, long id) { 
       Toast.makeText(
         getApplicationContext(), 
         leaderboardtitle.get(groupPosition) 
           + " -> " 
           + leaderboardDetail.get(
           leaderboardtitle.get(groupPosition)).get(
           childPosition), Toast.LENGTH_SHORT 
       ).show(); 
       return false; 
      } 
     }); 
    }

列表數據源：

List<String> cricket = new ArrayList<String>(); 
     cricket.add("India"); 
     cricket.add("Pakistan"); 
     cricket.add("Australia"); 
     cricket.add("England"); 
     cricket.add("South Africa"); 
     cricket.add("India"); 
     cricket.add("Pakistan"); 
     cricket.add("Australia"); 
     cricket.add("England"); 
     cricket.add("South Africa");

我已嘗試設置layout_height = match_parent的擴展列表，但它沒有工作

來源

2017-05-31 Teja Nandamuri

當你ExpandableListView有可能發生這種情況wrap_content寬度和高度。要修復，使其同父RelativeLayout

<ExpandableListView 
     android:id="@+id/leaderboard_list_view" 
     android:layout_width="match_parent" 
     android:layout_height="match_parent" 
     android:layout_marginLeft="10dp" 
     android:layout_marginRight="10dp" 
     android:transcriptMode="alwaysScroll" />

來源

2017-05-31 18:11:03 petey

不，我們需要手動計算列表視圖的高度時擴大呢？ –

首先：是的ListView depricated，它應該已經死了很久以前，然而，我把它看到後！

二：移動到recyclerView，這裏有一些資源，這將幫助你的： 1尼斯介紹吧：https://developer.android.com/training/material/lists-cards.html 2.我的對話框cheetSheet應用（類似於演示應用程序）的一個對話框使用擴張recyclverview庫，試試吧https://github.com/WithoutCaps/DialogsCheatSheet

來源

2017-05-31 18:12:52

使用此代碼，它工作正常。這是主活動佈局：

<?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:orientation="vertical" > 


    <ExpandableListView 
    android:id="@+id/expandable_listview" 
    android:layout_width="match_parent" 
    android:layout_height="match_parent" > 
</ExpandableListView> 

</LinearLayout>

父項目佈局：

<?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:orientation="vertical" > 


<TextView 
    android:layout_height="wrap_content" 
    android:layout_width="match_parent" 
    android:id="@+id/tv_parent_item" 
    android:layout_marginLeft="10dp" 
    android:layout_gravity="center_vertical" 
    android:textSize="20sp" 
    /> 

</LinearLayout>

你的子項佈局：

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


    <ImageView 
    android:layout_height="wrap_content" 
    android:layout_width="wrap_content" 
    android:id="@+id/iv_child_item" 
    android:background="@drawable/ic_launcher" 
    /> 

<LinearLayout 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:orientation="vertical" 
     android:layout_marginLeft="100dp" 
     android:layout_marginTop="5dp" > 


<TextView 
    android:layout_height="wrap_content" 
    android:layout_width="match_parent" 
    android:id="@+id/tv_child_item1" 
    android:layout_marginLeft="10dp" 
    android:textSize="15sp" 
    android:text="Test" 
    /> 

<TextView 
    android:layout_height="wrap_content" 
    android:layout_width="match_parent" 
    android:id="@+id/tv_child_item2" 
    android:layout_marginLeft="10dp" 
    android:layout_marginTop="10dp" 
    android:textSize="15sp" 
    android:text="Test" 
    /> 


</LinearLayout>

自定義適配器類：

import java.util.HashMap; 
import java.util.List; 

import com.example.expandablelistview.R; 
import com.nostra13.universalimageloader.core.DisplayImageOptions; 
import com.nostra13.universalimageloader.core.ImageLoader; 
import com.nostra13.universalimageloader.core.ImageLoaderConfiguration; 
import com.nostra13.universalimageloader.core.listener.SimpleImageLoadingListener; 






import android.content.Context; 
import android.graphics.Bitmap; 
import android.graphics.Typeface; 



import android.view.LayoutInflater; 
import android.view.View; 
import android.view.ViewGroup; 
import android.widget.BaseExpandableListAdapter; 
import android.widget.ExpandableListAdapter; 
import android.widget.ExpandableListView; 
import android.widget.ImageView; 
import android.widget.TextView; 



public class ExpandableAdapter extends BaseExpandableListAdapter{ 

private Context context; 
private List<String> parentList; 
private HashMap<String , List<Songs>> childList; 
ImageLoader imageLoader = ImageLoader.getInstance(); 

DisplayImageOptions options; 

public ExpandableAdapter(){ 

} 


public ExpandableAdapter(Context context,List<String> parentList, 
     HashMap<String,List<Songs>> childList) 
{ 
    this.context=context; 
    this.parentList=parentList; 
    this.childList=childList; 

    options = new DisplayImageOptions.Builder() 
    .showImageOnLoading(R.drawable.ic_launcher) 
    .showImageForEmptyUri(R.drawable.ic_launcher) 
    .showImageOnFail(R.drawable.ic_launcher) 
    .cacheInMemory(true) 
    .cacheOnDisk(true) 
    .considerExifParams(true) 
    .bitmapConfig(Bitmap.Config.RGB_565) 
    .build(); 
    ImageLoaderConfiguration config = new ImageLoaderConfiguration.Builder(context) 
    .defaultDisplayImageOptions(options) 
    .build(); 
    imageLoader.getInstance().init(config); 



} 

@Override 
public int getGroupCount() { 
    // TODO Auto-generated method stub 
    return this.parentList.size(); 
} 

@Override 
public int getChildrenCount(int groupPosition) { 
    // TODO Auto-generated method stub 
    return this.childList.get(this.parentList.get(groupPosition)).size(); 

} 

@Override 
public Object getGroup(int groupPosition) { 
    // TODO Auto-generated method stub 
    return this.parentList.get(groupPosition); 
} 

@Override 
public Object getChild(int groupPosition, int childPosition) { 
    // TODO Auto-generated method stub 
    return this.childList.get(this.parentList.get(groupPosition)).get(childPosition); 
} 

@Override 
public long getGroupId(int groupPosition) { 
    // TODO Auto-generated method stub 
    return groupPosition; 
} 

@Override 
public long getChildId(int groupPosition, int childPosition) { 
    // TODO Auto-generated method stub 
    return childPosition; 
} 

@Override 
public boolean hasStableIds() { 
    // TODO Auto-generated method stub 
    return false; 
} 

@Override 
public View getGroupView(int groupPosition, boolean isExpanded, 
     View convertView, ViewGroup parent) { 
    // TODO Auto-generated method stub 

    String headerTitle = (String) getGroup(groupPosition); 

    if (convertView == null) { 
      LayoutInflater infalInflater = (LayoutInflater) this.context 
        .getSystemService(Context.LAYOUT_INFLATER_SERVICE); 
      convertView = infalInflater.inflate(R.layout.parent_item, null); 



     } 
    TextView lblListHeader = (TextView) convertView 
       .findViewById(R.id.tv_parent_item); 
     lblListHeader.setTypeface(null, Typeface.BOLD); 
     lblListHeader.setText(headerTitle); 




     ExpandableListView eLV = (ExpandableListView) parent; 
     eLV.expandGroup(groupPosition); 



     return convertView; 





} 

@Override 
public View getChildView(int groupPosition, int childPosition, 
     boolean isLastChild, View convertView, ViewGroup parent) { 
    // TODO Auto-generated method stub 

    Songs childText = (Songs) getChild(groupPosition, childPosition); 


    if(convertView==null) 
    { 
     LayoutInflater infalInflater = (LayoutInflater) this.context 
        .getSystemService(Context.LAYOUT_INFLATER_SERVICE); 
     convertView = infalInflater.inflate(R.layout.child_item , null); 


    } 

    TextView artist = (TextView) convertView.findViewById(R.id.tv_child_item1); 
    TextView song = (TextView) convertView.findViewById(R.id.tv_child_item2); 
    ImageView image = (ImageView) convertView.findViewById(R.id.iv_child_item); 


    artist.setText(childText.getArtist()); 
    song.setText(childText.getSong()); 
    String imgUrl=childText.getArtwork(); 

    imageLoader.displayImage(imgUrl, image); 




    return convertView; 


} 

@Override 
public boolean isChildSelectable(int groupPosition, int childPosition) { 
    // TODO Auto-generated method stub 
    return true; 
} 



}

爲主要活動onCreate（）方法：

@Override 
protected void onCreate(Bundle savedInstanceState) { 
    // TODO Auto-generated method stub 
    super.onCreate(savedInstanceState); 

    setContentView(R.layout.activity_main); 

    expListView = (ExpandableListView) findViewById(R.id.expandable_listview); 

    listParent = new ArrayList<String>(); 
    listChild = new HashMap<String, List<Songs>>(); 

    new GetData().execute(); 

     listAdapter = new ExpandableAdapter(this, listParent, listChild); 
     expListView.setAdapter(listAdapter); 


     expListView.setOnGroupClickListener(new OnGroupClickListener() { 

      @Override 
      public boolean onGroupClick(ExpandableListView parent, View v, 
        int groupPosition, long id) { 

       Toast.makeText(getApplicationContext(), 
       "Group Clicked " + listParent.get(groupPosition), 
       Toast.LENGTH_SHORT).show(); 

       return false; 


      } 




     }); 


     expListView.setOnGroupExpandListener(new OnGroupExpandListener() { 

      @Override 
      public void onGroupExpand(int groupPosition) { 


      } 
     }); 


     expListView.setOnGroupCollapseListener(new OnGroupCollapseListener() { 

      @Override 
      public void onGroupCollapse(int groupPosition) { 



      } 
     }); 


     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(), 
         listParent.get(groupPosition) 
           + " : " 
           + listChild.get(
             listParent.get(groupPosition)).get(
             childPosition), Toast.LENGTH_SHORT) 
         .show(); 
       return false; 
      } 
     }); 


}

來源

2017-05-31 18:49:31

android可擴展列表視圖不滾動

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