如何從ArrayList中的數據集列表視圖

這是我的適配器類：如何從ArrayList中的數據集列表視圖

public class MyAdapter extends ArrayAdapter { 
private Context context; 
private LayoutInflater inflater; 

private List<HashMap<String, String>> aList=new ArrayList<HashMap<String,String>>(); 
int[] to; 
public MyAdapter(Context context, List<HashMap<String, String>> aList) { 
    super(context, R.layout.layoutarray, aList); 

    this.context = context; 
    this.aList = aList; 
    inflater = LayoutInflater.from(context); 
} 



HashMap<String, String> m; 
@Override 
public View getView(int position, View convertView, ViewGroup parent) { 
    if (null == convertView) { 
     convertView = inflater.inflate(R.layout.layoutarray, parent, false); 
    } 

    TextView title1=(TextView)convertView.findViewById(R.id.posttitle); 
    TextView description1=(TextView)convertView.findViewById(R.id.postdesc); 
    //TextView image1=(ImageView)rootView.findViewById(R.id.postimage); 
    TextView date=(TextView)convertView.findViewById(R.id.postdate); 
    ImageView image1=(ImageView)convertView.findViewById(R.id.postimage); 

    title1.setText(aList.get(aList.get(0).get("Title"))); 
    // Picasso.with(context).load(m.get("Image")).into(image1); 

    return convertView; 
} 
}

這是我的活動：

@Override 
public View onCreateView(LayoutInflater inflater, ViewGroup container, 
         Bundle savedInstanceState) { 
    TextView textView = new TextView(getActivity()); 
    final View rootView = inflater.inflate(R.layout.aa, container, false); 
    Firebase.setAndroidContext(getActivity()); 
    Firebase ref = new Firebase(FIREBASE_URL); 



    final List<HashMap<String, String>> aList = new ArrayList<HashMap<String, String>>(); 
    final ListView listView = (ListView) rootView.findViewById(R.id.listView); 

    final MyAdapter adapter = new MyAdapter(getActivity(),aList); 
    listView.setAdapter(adapter); 





    ref.addValueEventListener(new ValueEventListener() { 
     @Override 
     public void onDataChange(DataSnapshot dataSnapshot) { 
      for (DataSnapshot child : dataSnapshot.getChildren()) { 

       for (DataSnapshot single : child.getChildren()) { 
        Map<String, Object> map = (Map<String, Object>) single.getValue(); 

        namerc = (String) map.get("Namerc"); 
        image = (String) map.get("Imagerc"); 
        description = (String) map.get("Description"); 
        title=(String) map.get("Title"); 

        if (namerc!=null && description!=null && title!=null) { 
         String[] title1={title}; 
         String[] desc1={description}; 
         String[] name1={namerc}; 
         String[] image1={image}; 

         Toast.makeText(getActivity(), description, Toast.LENGTH_SHORT).show(); 
         HashMap<String,String>data=new HashMap<String, String>(); 
         for (int i=0; i<title1.length;i++) { 
          data.put("Title", title1[i]); 
          data.put("Desc",desc1[i]); 
          data.put("Name",name1[i]); 
          data.put("Image",image1[i]); 
         } 
         aList.add(0,data); 
         adapter.notifyDataSetChanged(); 

        } 
       } 
      } 
     } 

     @Override 
     public void onCancelled(FirebaseError firebaseError) { 

     } 
    }); 

    return rootView; 
} 


}

我想從我的列表文本視圖設置的值（其是一個listiview）。但當我設置它只顯示列表視圖中的第一個數據。我不明白髮生了什麼問題，如何從列表中獲取所有數據並將其設置爲列表視圖。請幫我解決這個問題..

來源

2016-10-18 Shiv uday

可能是你的rootview您正在膨脹具有高度match_parent而非WRAP_CONTENT – Manifest

使用'title1.setText（aList.get（aList.get（位置）獲得（「標題」）））;'。建議你切換到recyclerview。 – Raghunandan

Thanks Ragunadhan它解決了我的問題，只是編輯yur這樣回答。 title1.setText（aList.get（位置）獲得（「標題」））; –

我猜你每次都會得到相同的值。獲得適配器中正確位置的價值。事情是這樣的：

title1.setText(aList.get(position).get("Title"));

來源

2016-10-18 17:05:18 egoldx

這個好友！謝謝.. –

如何從ArrayList中的數據集列表視圖

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