Question

这是我的适配器类：

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;
}
}

这是我的活动：

 @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;
}


}

我想将值从我的列表设置为文本视图（这是一个视角）。但是当我设置它时，它只显示listview中的第一个数据。我不明白出了什么问题，如何从List中获取所有数据并将其设置为listview。请帮我解决这个问题..

Answer 1

我猜你每次都得到相同的价值。获取适配器中正确位置的值。像这样：

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

如何将数据从arraylist设置为listview

1 个答案: