我有一个android客户端，可通过REST风格的端点和JSON与服务器进行通信。因此，我需要先检索完整的服务器响应，然后再将其转换为哈希。我有以下代码可以做到这一点（可以在某个地方的互联网上找到）：

private static 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();
}

该代码在大多数情况下有效，但是我在行中看到OutOfMemory异常的客户端发生崩溃的报告：

    while ((line = reader.readLine()) != null) {

完整的堆栈跟踪为：

java.lang.RuntimeException: An error occured while executing doInBackground()
    at android.os.AsyncTask$3.done(AsyncTask.java:200)
    at java.util.concurrent.FutureTask$Sync.innerSetException(FutureTask.java:273)
    at java.util.concurrent.FutureTask.setException(FutureTask.java:124)
    at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:307)
    at java.util.concurrent.FutureTask.run(FutureTask.java:137)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1068)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:561)
    at java.lang.Thread.run(Thread.java:1102)
Caused by: java.lang.OutOfMemoryError
    at java.lang.String.(String.java:468)
    at java.lang.AbstractStringBuilder.toString(AbstractStringBuilder.java:659)
    at java.lang.StringBuilder.toString(StringBuilder.java:664)
    at java.io.BufferedReader.readLine(BufferedReader.java:448)
    at com.appspot.myapp.util.RestClient.convertStreamToString(RestClient.java:303)
    at com.appspot.myapp.util.RestClient.executeRequest(RestClient.java:281)
    at com.appspot.myapp.util.RestClient.Execute(RestClient.java:178)
    at com.appspot.myapp.$LoadProfilesTask.doInBackground(GridViewActivity.java:1178)
    at com.appspot.myapp.$LoadProfilesTask.doInBackground(GridViewActivity.java:1)
    at android.os.AsyncTask$2.call(AsyncTask.java:185)
    at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:305)
    ... 4 more

我的问题：除了从服务器发送较小的数据块外，还有什么方法可以解决此问题？

谢谢！