서버에서 이미지 비트 맵을 다운로드하면 Android 2.2에서 null이 반환됩니다.

Question

아래 기능을 사용하여 서버에서 이미지를 다운로드합니다. 이것은 안드로이드 2.2 Froyo 장치를 제외한 모든 안드로이드 버전에 완벽하게 작동합니다. 도와주세요.

private Bitmap downloadImage(String url) { 
     System.out.println("Splash Ad downloadImage Url " + 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("Hub", "Error getting the image from server : " 
        + e.getMessage().toString()); 
      e.printStackTrace(); 
     } 
     return bm; 
    } 

Answer 1

이 코드를 사용해보십시오.

public class ImageDisplay extends Activity { 
     ImageView image; 
     ProgressBar spinner; 
     TextView message; 
     String path; 
@Override 
     public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_image_display); 
    image=(ImageView) findViewById(R.id.imageDisplay); 
    spinner=(ProgressBar)findViewById(R.id.progressBar_spinner); 
    message=(TextView)findViewById(R.id.textView1); 
    spinner.setVisibility(View.INVISIBLE); 
    displayImage(); 
} 
     private class DownloadImage extends AsyncTask<String, Void,Bitmap > 
      { 
Bitmap bitmap; 
String error_messsage="No error"; 
@Override 
protected Bitmap doInBackground(String... urls) { 
    for(String url:urls){ 
    HttpUriRequest request = new HttpGet(url.toString()); 
     HttpClient httpClient = new DefaultHttpClient(); 
     try { 
      HttpResponse response = httpClient.execute(request); 
      StatusLine statusLine = response.getStatusLine(); 
      int statusCode = statusLine.getStatusCode(); 
      if (statusCode == 200) { 
       HttpEntity entity = response.getEntity(); 
       byte[] bytes = EntityUtils.toByteArray(entity); 
      Log.e("here",""+bytes.length); 
       bitmap = BitmapFactory.decodeByteArray(bytes, 0,bytes.length); 
       Thread.sleep(1000); 
      } 
      else 
      { 
       error_messsage="Download failed, HTTP response code "+ statusCode + " - " + statusLine.getReasonPhrase();     
      } 
     } catch (Exception er) { 
      Log.e("Error",""+er); 
     }} 
     //image.setImageBitmap(bitmap); 
    return bitmap ; 
} 

@Override 
protected void onPostExecute(Bitmap result) { 
    spinner.setVisibility(View.INVISIBLE); 
    image.setImageBitmap(result); 

} 
    } 
    public void displayImage() 
    { 

    DownloadImage task = new DownloadImage(); 
    task.execute(new String[] { "http://team-android.com/wp-    content/uploads/2011/03/Android-3d_428.jpg" }); 
    snap.setVisibility(View.VISIBLE); 

    }