從位圖獲取URI？

Question

我嘗試做

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我得到了它，我充滿了我的SimpleListAdapter一個ListView什麼，該數據來自JSON-文件。現在我寫了一個ImageDownloader，我想將圖像放入ListView中。但是，我在這裏百達得到這個錯誤：resolve Uri failed on bad bitmap uri.

問題

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什麼我需要改變，以獲取代碼工作。 Thx提前爲您提供幫助！ 你在這裏找到代碼！

代碼

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ChannelActivity.class

package de.stepforward; 

import java.io.BufferedInputStream; 
import java.io.BufferedReader; 
import java.io.IOException; 
import java.io.InputStream; 
import java.io.InputStreamReader; 
import java.net.URL; 
import java.net.URLConnection; 
import java.util.ArrayList; 
import java.util.HashMap; 
import java.util.Map; 


import org.json.JSONArray; 
import org.json.JSONObject; 

import de.stepforward.web.ShowVideo; 


import android.app.ListActivity; 
import android.content.Intent; 
import android.graphics.Bitmap; 
import android.graphics.BitmapFactory; 
import android.graphics.drawable.Drawable; 
import android.os.Bundle; 
import android.util.Log; 
import android.view.View; 
import android.widget.AdapterView.OnItemClickListener; 
import android.widget.AdapterView; 
import android.widget.ListAdapter; 
import android.widget.ListView; 
import android.widget.SimpleAdapter; 



public class ChannelActivity extends ListActivity { 


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


    String result = ""; 
    String line = null; 
    final ArrayList<HashMap<String, String>> mylist = new ArrayList<HashMap<String, String>>(); 


    //get the Data from URL 
    try{ 
    URL url = new URL("http://gdata.youtube.com/feeds/mobile/users/TheStepForward/uploads?alt=json&format=1"); 

    URLConnection conn = url.openConnection(); 
    StringBuilder sb = new StringBuilder(); 
    BufferedReader rd = new BufferedReader(new InputStreamReader(conn.getInputStream())); 

    //read d response till d end 
    while ((line = rd.readLine()) != null) { 
    sb.append(line + "\n"); 
    } 
    result = sb.toString(); 
    Log.v("log_tag", "Append String " + result); 
    } catch (Exception e) { 
    Log.e("log_tag", "Error converting result " + e.toString()); 
    } 

    try{ 
     JSONObject json = new JSONObject(result); 
     JSONObject feed = json.getJSONObject("feed"); 
     JSONArray entrylist = feed.getJSONArray("entry"); 

     for(int i=0;i<entrylist.length();i++){ 
      //Get Title 
      JSONObject movie = entrylist.getJSONObject(i); 
      JSONObject title = movie.getJSONObject("title"); 
      String txtTitle = title.getString("$t"); 
      Log.d("Title", txtTitle); 

      //Get Description 
      JSONObject content = movie.getJSONObject("content"); 
      String txtContent = content.getString("$t"); 
      Log.d("Content", txtContent); 

      //Get Link 
      JSONArray linklist = movie.getJSONArray("link"); 
      JSONObject link = linklist.getJSONObject(0); 
      String txtLink = link.getString("href"); 
      Log.d("Link", txtLink); 


      //Get Thumbnail 
      JSONObject medialist = movie.getJSONObject("media$group"); 
      JSONArray thumblist = medialist.getJSONArray("media$thumbnail"); 
      JSONObject thumb = thumblist.getJSONObject(2); 
      String txtThumb = thumb.getString("url"); 
      Log.d("Thumb", txtThumb.toString()); 

      //ImageLoader 
      Bitmap bitmap = getImageBitmap(txtThumb); 

      String picture = bitmap.toString(); 

      //String Array daraus machen und in Hashmap füllen 
      HashMap<String, String> map = new HashMap<String, String>(); 
      map.put("Thumb", picture); 
      map.put("Title", txtTitle); 
      map.put("Content", txtContent); 
      map.put("Link", txtLink); 
      mylist.add(map); 

     } 
     //ListView füllen 
     ListAdapter adapter = new SimpleAdapter(this, mylist , R.layout.lit, 
       new String[] { "Thumb","Title","Content","Link"}, 
       new int[] { R.id.img_video,R.id.txt_title,R.id.txt_subtitle});  
     setListAdapter(adapter); 


     //OnClickLister um Youtube-Video zu öffnen 
     final ListView lv = getListView(); 
      lv.setOnItemClickListener(new OnItemClickListener(){ 
       public void onItemClick(AdapterView<?> parent, View v, int position, long id) { 

        //Video-Link auslesen 
        Map<String, String> map = mylist.get(position); 
        String link = map.get("Link"); 
        Log.d("Link", link); 

        //Link übergeben, Activity starter 
        final Intent Showvideo = new Intent(ChannelActivity.this, ShowVideo.class); 
        Showvideo.putExtra("VideoLink", link); 
        startActivity(Showvideo); 


       } 
      }); 



    }catch (Exception e) { 
     Log.e("log_tag", "Error converting result " + e.toString()); 
     } 
    } 
    private Bitmap getImageBitmap(String url) { 
     Bitmap bm = null; 
     try { 
      URL aURL = new URL(url); 
      URLConnection conn = aURL.openConnection(); 
      conn.connect(); 
      InputStream is = conn.getInputStream(); 
      BufferedInputStream bis = new BufferedInputStream(is); 
      bm = BitmapFactory.decodeStream(bis); 
      bis.close(); 
      is.close(); 
     } catch (IOException e) { 
      Log.e("SHIT", "Error getting bitmap", e); 
     } 
     return bm; 
    } 

} 

Answer 1

你最有可能試圖解碼.jpg或png格式作爲位圖。

看看這個問題&答案。

resolveUri failed on bad bitmap uri」 when putting image on ListView

Answer 2

我認爲這個問題是SimpleAdapter只有TextViews工作，它看起來像你想用它來與一個ImageView的工作。

您需要創建一個ListAdapter，並在getView方法中手動設置視圖中的數據。