安卓内存不足错误？

Question

我在此处检索图像时不断收到这些错误。

07-26 17:21:29.194: ERROR/AndroidRuntime(396): java.lang.RuntimeException: An error occured while executing doInBackground()
 07-26 17:21:29.194: ERROR/AndroidRuntime(396):     at android.os.AsyncTask$3.done(AsyncTask.java:200)
   07-26 17:21:29.194: ERROR/AndroidRuntime(396):     at java.util.concurrent.FutureTask$Sync.innerSetException(FutureTask.java:274)
    07-26 17:21:29.194: ERROR/AndroidRuntime(396):     at java.util.concurrent.FutureTask.setException(FutureTask.java:125)
     07-26 17:21:29.194: ERROR/AndroidRuntime(396):     at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:308)
      07-26 17:21:29.194: ERROR/AndroidRuntime(396):     at java.util.concurrent.FutureTask.run(FutureTask.java:138)
       07-26 17:21:29.194: ERROR/AndroidRuntime(396):     at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1088)
     07-26 17:21:29.194: ERROR/AndroidRuntime(396):     at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:581)
      07-26 17:21:29.194: ERROR/AndroidRuntime(396):     at java.lang.Thread.run(Thread.java:1019)
     07-26 17:21:29.194: ERROR/AndroidRuntime(396): Caused by: java.lang.OutOfMemoryError

当我尝试使用此代码检索图像时，会发生这种情况。

公共无效 getImages() 抛出 IOException{

    DefaultHttpClient httpclient = new DefaultHttpClient();

    HttpGet httppost = new HttpGet("https://sites.google.com/site/theitrangers/images/webImages.txt");
    HttpResponse response;

        response = httpclient.execute(httppost);


            HttpEntity ht = response.getEntity();

            BufferedHttpEntity buf = new BufferedHttpEntity(ht);

            InputStream is = buf.getContent();


            BufferedReader r = new BufferedReader(new InputStreamReader(is));

            StringBuilder total = new StringBuilder();
            String line;
            while ((line = r.readLine()) != null) {
                total.append(line + "\n");

              imageUrl = total.toString();
              Log.v("getImage1", "Retreived image");
            }
     }

Answer 1

我想说这是因为您正在使用 BufferedHttpEntity 它尝试将整个响应加载到内存中。你试过没有它吗？

InputStream is = response.getEntity().getContent();

然后处理它？

Answer 2

我不知道您是否打算这样做，但是您将读入的文本文件中的每一行 URL（？） 附加到 StringBuffer 中，然后将到目前为止读取的 url 分配给 imageUrl。这意味着您基本上正在这样做：

imageUrl = URL1
imageUrl = URL1, URL2
...
imageUrl = URL1, URL2, ... URLn

也许这导致了内存问题。