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我已经被这个问题困扰了好几天，没有看到任何解决方案。

我通过 php 将 mysql 中的数据传递到 json 数组中。我正在循环遍历 json 并将数据放入哈希图中，我需要将数据集提取为整数，并在我自定义构建的 getView 中的 switch/case 或 if 语句中使用它。

评分数据以字符串形式出现，我需要使用一些 if statemetns 来根据评分设置星数，但我在将其转换为 getView() 中的 int 时遇到问题

任何帮助都将获得评论 = json.getJSONArray(TAG_REVIEWS);

//looping through all the reviews

for(int i=0; i<reviews.length(); i++){
JSONObject r = reviews.getJSONObject(i);


//Storing each JSON items of id and user name from the array in variables 
String rating = r.getString(TAG_RATING);
String content = r.getString(TAG_CONTENT);
String userName = r.getString(TAG_USER_NAME);

//new hashmap object to hold the items from JSONArray
HashMap<String, String> map = new HashMap<String, String>();

map.put(TAG_RATING, rating); //THIS IS THE DATA I WILL NEED AS INT

map.put(TAG_CONTENT, content);
map.put(TAG_USER_NAME, userName);
map.put(TAG_RANK, rank);

//adding items to the arraylist object 
reviewList.add(map);
}
}else{

Intent noReviews = new Intent(getApplicationContext(),
AllProductsActivity.class);
//adding flags to close all prior activities
noReviews.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(noReviews);

                }
            } catch (JSONException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
            return null;
        }

        @Override
        protected void onPostExecute(String result) {
            super.onPostExecute(result);

            pDialog.dismiss();

            /**
             * Updating parsed JSON data into ListView
             * */



            ListAdapter adapter = new CustomReviewListAdapter(
                    ProductReviews.this, reviewList,
                    R.layout.list_review_item_layout, new String[] {TAG_CONTENT,  

   TAG_RANK, TAG_RATING 
                           });


            setListAdapter(adapter);
        }

对于我的自定义适配器，请参阅下面的所有 IF 语句

我想做的是从哈希图中获取KEY“评级，将其转换为int并执行if语句来设置drawable”

   public class CustomReviewListAdapter extends ArrayAdapter<HashMap<String, String>> {

private ArrayList<HashMap<String, String>> data;
private Context context;
private LayoutInflater mInflater;
private int viewId;
private String[] tag;

private static final String TAG_CONTENT = "content";
private static final String TAG_RATING = "rating";
    private static final String TAG_USER_NAME = "user_name";


public CustomReviewListAdapter(Context c,
        ArrayList<HashMap<String, String>> data,
        int viewId, String[] tag) {
    super(c, viewId, data );

    this.context = c;
    this.data= data;
    this.viewId = viewId ;
}


@Override
public int getCount() {

    return data.size();
}

@Override
public View getView(int position, View convertView, ViewGroup parent) {

    View vi = convertView;
    Holder holder;

    if (convertView == null) {

        // Inflate the view since it does not exist
        if (vi == null) {
            mInflater = (LayoutInflater) 

 getContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
            vi = mInflater.inflate(R.layout.list_review_item_layout, null);

        }

        holder = new Holder();
        holder.textView = (TextView) vi.findViewById(R.id.content);
        holder.userName = (TextView) vi.findViewById(R.id.userName);
        holder.imageView = (ImageView) vi.findViewById(R.id.num_stars);

        vi.setTag(holder);  
    }else {
        holder = (Holder) vi.getTag();
    }

    HashMap<String, String> currentData = new HashMap<String, String>();
    currentData = data.get(position);



    if (currentData != null) {
        holder.textView.setText(currentData.get(TAG_CONTENT));
        holder.userName.setText(currentData.get(TAG_USER_NAME));


        //if(s == "5" ){
        //holder.imageView.setImageResource(R.drawable.one_half);    
        //}else if(s == "4"){
        //holder.imageView.setImageResource(R.drawable.two_stars);  
        //}else if(s == "1"){
        //holder.imageView.setImageResource(R.drawable.three);  
        //}else if(s == "2"){
        //holder.imageView.setImageResource(R.drawable.three_half);  
        //}else{
        //holder.imageView.setImageResource(R.drawable.five_star);  
            //}
        }


    return vi;
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1 回答 1

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您可以将您的 Objects 存储在 type 的地图中Map<String, ?>，从而做出声明：

map.put(TAG_RATING, Integer.parseInt(rating));

另一个技巧是使用droidQuery库为您简化一切：

Map<String, ?> map = $.map(r);//given r, your JSONObject
map.put(TAG_RATING, Integer.parseInt((String) map.remove(TAG_RATING));

最后，注释掉的代码的简化是使用以下switch语句：

switch(s) {
    case 5 :
        holder.imageView.setImageResource(R.drawable.one_half);
        break;
    case 4 :
        //etc
        break;
    default:
        break;
}
于 2013-08-06T21:42:24.140 回答