設置動態列表活動

請指導以下代碼錯在哪裏，它沒有創建包括動態圖像在內的適當的列表活動及其從服務器輸出的描述。這裏是圖像 enter image description here 設置動態列表活動

，因爲它應該是這樣的

enter image description here

如可以看到只有一個圖像加載不帶任何說明和其餘沒有圖像甚至沒有空間，請指導什麼是錯誤的XML和代碼。下面是代碼

主類

public class Test extends ListActivity { 


    @Override 
    public void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.listplaceholder); 

     // install handler for processing gui update messages 
     ArrayList<HashMap<String, Object>> mylist = new ArrayList<HashMap<String, Object>>(); 
     JSONObject json = JSONfunctions.getJSONfromURL("http://midsweden.gofreeserve.com/proj/androidjson.php?identifier=123"); 


     try{ 

      JSONArray earthquakes = json.getJSONArray("services"); 

      for(int i=0;i<earthquakes.length();i++){       
       HashMap<String, Object> map = new HashMap<String, Object>(); 
       JSONObject e = earthquakes.getJSONObject(i); 

       map.put("id", e.getString("taskid")); 
       map.put("pic", "Service name : " + e.getString("employeepic")); 
       map.put("serviceinfo", "" + e.getString("employeename")+ " : "+ e.getString("starttime") 
         +" To " + e.getString("endtime")); 


       String imageid = e.getString("employeepic"); 


        ImageView iv = (ImageView) findViewById(R.id.image); 
        Bitmap b = getUserPic(imageid); 
        iv.setImageBitmap(b); 


        map.put("img",b); 
       mylist.add(map);    
      }  
     }catch(JSONException e)  { 
      Log.e("log_tag", "Error parsing data "+e.toString()); 
     } 

     SimpleAdapter adapter = new SimpleAdapter(this, mylist , R.layout.test,new String[] {"img", "servicename", "serviceinfo" }, 
         new int[] { R.id.image ,R.id.items, R.id.item_subtitle }); 

     setListAdapter(adapter); 

     final ListView lv = getListView(); 
     lv.setTextFilterEnabled(true); 
     lv.setOnItemClickListener(new OnItemClickListener() { 
      public void onItemClick(AdapterView<?> parent, View view, int position, long id) {    
       @SuppressWarnings("unchecked") 
       HashMap<String, String> o = (HashMap<String, String>) lv.getItemAtPosition(position);     
       Toast.makeText(Test.this, "ID '" + o.get("id") + "' was clicked.", Toast.LENGTH_SHORT).show(); 

      } 
     }); 

    } 

    public Bitmap getUserPic(String picID) { 
     String imageURL; 
     Bitmap bitmap = null; 
     Log.d("BITMAP", "Loading Picture"); 
     imageURL = "http://midsweden.gofreeserve.com/proj/admin/"+picID; 
     try { 
      bitmap = BitmapFactory.decodeStream((InputStream)new URL(imageURL).getContent()); 
     } catch (Exception e) { 
      Log.d("BITMAP", "Loading Picture FAILED"); 
      e.printStackTrace(); 
     } 
     return bitmap; 
    } 


}

這裏是jsonfunction類我覺得有需要發佈，但只是爲別人的理解如下

public class JSONfunctions { 

    public static JSONObject getJSONfromURL(String url){ 
     InputStream is = null; 
     String result = ""; 
     JSONObject jArray = null; 

     //http post 
     try{ 
       HttpClient httpclient = new DefaultHttpClient(); 
       HttpPost httppost = new HttpPost(url); 
       HttpResponse response = httpclient.execute(httppost); 
       HttpEntity entity = response.getEntity(); 
       is = entity.getContent(); 

     }catch(Exception e){ 
       Log.e("log_tag", "Error in http connection "+e.toString()); 
     } 

     //convert response to string 
     try{ 
       BufferedReader reader = new BufferedReader(new InputStreamReader(is,"iso-8859-1"),8); 
       StringBuilder sb = new StringBuilder(); 
       String line = null; 
       while ((line = reader.readLine()) != null) { 
         sb.append(line + "\n"); 
       } 
       is.close(); 
       result=sb.toString(); 
     }catch(Exception e){ 
       Log.e("log_tag", "Error converting result "+e.toString()); 
     } 

     try{ 

      jArray = new JSONObject(result);    
     }catch(JSONException e){ 
       Log.e("log_tag", "Error parsing data "+e.toString()); 
     } 

     return jArray; 
    } 
}

我有兩個XML檔案，然後主要爲這個項目，這是 test.xml

<TextView 

    android:id="@+id/items" 
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    android:textAppearance="?android:attr/textAppearanceMedium" 
    android:padding="2dp" 
    android:textSize="20dp" /> 
    <TextView 
    android:id="@+id/item_subtitle" 
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    android:padding="2dp" 
    android:textSize="18dp" /> 
</LinearLayout>

listplace架

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    android:orientation="vertical" 
    android:layout_width="fill_parent" 
    android:layout_height="fill_parent">  
    <ImageView 
     android:id="@+id/image" 
     android:layout_width="50dip" 
     android:layout_height="50dip" 
     android:scaleType="centerCrop"/> 
    <ListView 
     android:id="@id/android:list" 
     android:layout_width="fill_parent" 
     android:layout_height="wrap_content" 
     android:layout_weight="1" 
     android:drawSelectorOnTop="false" /> 

    <TextView 
     android:id="@id/android:empty" 
     android:layout_width="fill_parent" 
     android:layout_height="wrap_content" 
     android:text="No data"/> 

</LinearLayout>

我知道有lazylist可用的，但我想設置這對我的理解。謝謝

來源

2011-07-10 umar

你可以發佈你想怎麼它工作時看草圖/圖。 – Kenny

@ Kenny謝謝。我已經用問題 – umar