android - 在android中从网络服务器获取图像时出现异常

Question

您好，我在从服务器获取图像时遇到以下异常。在得到以下结果后，我开始获取 5-7 张图片:

06-12 16:35:50.904: WARN/AsyncTask(717): java.lang.InterruptedException 06-12 16:35:50.904: WARN/AsyncTask(717):
at java.util.concurrent.locks.AbstractQueuedSynchronizer.acquireSharedInterruptibly(AbstractQueuedSynchronizer.java:1254) 06-12 16:35:50.904: WARN/AsyncTask(717): at java.util.concurrent.FutureTask$Sync.innerGet(FutureTask.java:219) 06-12 16:35:50.904: WARN/AsyncTask(717): at java.util.concurrent.FutureTask.get(FutureTask.java:82) 06-12 16:35:50.904: WARN/AsyncTask(717): at android.os.AsyncTask$3.done(AsyncTask.java:196) 06-12 16:35:50.904: WARN/AsyncTask(717): at java.util.concurrent.FutureTask$Sync.innerCancel(FutureTask.java:293) 06-12 16:35:50.904: WARN/AsyncTask(717): at java.util.concurrent.FutureTask.cancel(FutureTask.java:75) 06-12 16:35:50.904: WARN/AsyncTask(717): at android.os.AsyncTask.cancel(AsyncTask.java:325) 06-12 16:35:50.904: WARN/AsyncTask(717): at us.bnn.news.IncidentDetailsActivity$GetImages.doInBackground(IncidentDetailsActivity.java:1691) 06-12 16:35:50.904: WARN/AsyncTask(717): at us.bnn.news.IncidentDetailsActivity$GetImages.doInBackground(IncidentDetailsActivity.java:1) 06-12 16:35:50.904: WARN/AsyncTask(717): at android.os.AsyncTask$2.call(AsyncTask.java:185) 06-12 16:35:50.904: WARN/AsyncTask(717): at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:305) 06-12 16:35:50.904: WARN/AsyncTask(717): at java.util.concurrent.FutureTask.run(FutureTask.java:137) 06-12 16:35:50.904: WARN/AsyncTask(717): at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1068) 06-12 16:35:50.904: WARN/AsyncTask(717): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:561) 06-12 16:35:50.904: WARN/AsyncTask(717): at java.lang.Thread.run(Thread.java:1096)

我正在使用这个方法:

public static Bitmap getLargeImage(String imgUrl)
    {
        Bitmap bitmap = null;               
        InputStream in = null;
        Log.v(TAG,"start fetchimg main images");
        try
        {             
            DefaultHttpClient mHttpClient = new DefaultHttpClient();

            HttpGet mHttpGet = new HttpGet(imgUrl);

            HttpResponse mHttpResponse = mHttpClient.execute(mHttpGet);

            if (mHttpResponse.getStatusLine().getStatusCode() == HttpStatus.SC_OK) 
            {
                HttpEntity entity = mHttpResponse.getEntity();           
                if ( entity != null) 
                {
                    in = entity.getContent();

                    BufferedInputStream bis = new BufferedInputStream(in, 8190);

                    ByteArrayBuffer baf = new ByteArrayBuffer(50);
                    int current = 0;
                    while ((current = bis.read()) != -1) {
                        baf.append((byte)current);
                    }
                    byte[] imageData = baf.toByteArray();
                    BitmapFactory.decodeByteArray(imageData, 0, imageData.length);
                    if(in != null)
                        in.close();
                } 
            }                     
        }
        catch (Exception ex)
        {
            Log.v("Error Fetching images from url",ex.getMessage());          
        }
        return bitmap;
    }

Answer 1

您是否在不同的线程中接收图像？如果是，您使用哪个类下载图像？标准 HttpClient 不是线程安全的，您应该使用 ThreadSafeClientConnManager 来获得线程安全的。