Question

我正在读取Stream中的youtube响应并将其转换为String。使用以下代码：

网址：http://gdata.youtube.com/feeds/api/users/cnn/uploads?&v=2&max-results=25&alt=json

private String convertStreamToString(InputStream is) {

        BufferedReader reader = new BufferedReader(new InputStreamReader(is));
        StringBuilder sb = new StringBuilder();

        String line = null;
        try {
            while ((line = reader.readLine()) != null) {
                sb.append(line + "\n");
            }        
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            try {
                is.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        return sb.toString();
    }

此代码在除Android 4.0设备之外的所有设备中都能正常运行。我得到以下logcat：

java.lang.RuntimeException: An error occured while executing doInBackground()
        at android.os.AsyncTask$3.done(AsyncTask.java:278)
        at java.util.concurrent.FutureTask$Sync.innerSetException(FutureTask.java:273)
        at java.util.concurrent.FutureTask.setException(FutureTask.java:124)
        at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:307)
        at java.util.concurrent.FutureTask.run(FutureTask.java:137)
        at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:208)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1076)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:569)
        at java.lang.Thread.run(Thread.java:856)
Caused by: java.lang.OutOfMemoryError
        at java.lang.AbstractStringBuilder.enlargeBuffer(AbstractStringBuilder.java:94)
        at java.lang.AbstractStringBuilder.append0(AbstractStringBuilder.java:145)
        at java.lang.StringBuilder.append(StringBuilder.java:216)
        at com.android.mypack.MyApplications.convertStreamToString(MyApplications.java:959)
        at com.android.mypack.MyApplications.access$61(MyApplications.java:951)
        at com.android.mypack.MyApplications$YoutubeTask.doInBackground(MyApplications.java:2303)
        at com.android.mypack.MyApplications$YoutubeTask.doInBackground(MyApplications.java:1)
        at android.os.AsyncTask$2.call(AsyncTask.java:264)
        at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:305)
        ... 5 more
java.lang.OutOfMemoryError
        at java.lang.AbstractStringBuilder.enlargeBuffer(AbstractStringBuilder.java:94)
        at java.lang.AbstractStringBuilder.append0(AbstractStringBuilder.java:145)
        at java.lang.StringBuilder.append(StringBuilder.java:216)
        at com.android.mypack.MyApplications.convertStreamToString(MyApplications.java:959)
        at com.android.mypack.MyApplications.access$61(MyApplications.java:951)
        at com.android.mypack.MyApplications$YoutubeTask.doInBackground(MyApplications.java:2303)
        at com.android.mypack.MyApplications$YoutubeTask.doInBackground(MyApplications.java:1)
        at android.os.AsyncTask$2.call(AsyncTask.java:264)
        at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:305)
        at java.util.concurrent.FutureTask.run(FutureTask.java:137)
        at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:208)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1076)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:569)
        at java.lang.Thread.run(Thread.java:856)

请帮我克服这个错误。在此先感谢。

Answer 1

好吧，当虚拟机内存不足时，OutOfMemoryErrors显然会出现。这里重要的一点是确切的堆栈跟踪可能没有提供信息，因为可能会发生另一个线程使用所有内存。或者在此代码之前，此线程上发生了一些内存耗尽的事情，而这段代码只是“最后一根稻草”。这个URL肯定不包含太多字节，我认为问题出在另一个地方。

您可以尝试使用内存分析器： Android ==> Memory Analysing ==> Eclipse memory analyzer?

AbstractStringBuilder中的OutOfMemoryError enlargeBuffer

1 个答案: