OutOfMemoryError：接收2.3 MB的XML响应时
以下是连接到Web服务并从服务器接收XML响应的简单方法，大约2.3MB，我得到的是OutOfMemoryError （ 我已经提到过这个 ），但是找不到我的方式，卡住了很多
public synchronized String getUpdates(boolean news) throws Exception { String response = null; HttpPost httppost; DefaultHttpClient httpclient; ResponseHandler res=new BasicResponseHandler(); List nameValuePairs; httppost = new HttpPost(context.getString(R.string.SYNCURL)); HttpParams params = new BasicHttpParams(); HttpProtocolParams.setContentCharset(params, "UTF-8"); String lastupdate = null; SharedPreferences preferences = context.getSharedPreferences(context.getPackageName(), Context.MODE_PRIVATE); lastupdate = preferences.getString(LAST_UPDATE, DatabaseHelper.updateDate); if(news) lastupdate = preferences.getString(LAST_UPDATE_NEWS, lastupdate); httpclient = new DefaultHttpClient(params); nameValuePairs = new ArrayList(2); nameValuePairs.add(new BasicNameValuePair("reqDTTM", lastupdate)); if(news)nameValuePairs.add(new BasicNameValuePair("doAction", "news")); if(!preferences.getString(LAST_UPDATE, "").equalsIgnoreCase(DatabaseHelper.updateDate)) { String timezon = UDFHelper.getTimeZon(context); nameValuePairs.add(new BasicNameValuePair("tz", timezon)); } httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs)); response = httpclient.execute(httppost, res); return response; }
这里导致尝试在String response检索大文本时出现问题：
response = httpclient.execute（httppost，res）;
我将响应存储在String中。 那是问题吗？ 什么是替代解决方案？
这是LogCat
09-23 10:07:31.654: INFO/ActivityManager(59): Displayed activity uk.co.dodec.rcgpapp/.SplashScreen: 1267 ms (total 1267 ms) 09-23 10:07:35.854: INFO/dalvikvm-heap(334): Grow heap (frag case) to 3.213MB for 262160-byte allocation 09-23 10:07:38.203: INFO/dalvikvm-heap(334): Grow heap (frag case) to 3.586MB for 524304-byte allocation 09-23 10:07:42.753: INFO/dalvikvm-heap(334): Grow heap (frag case) to 4.336MB for 1048592-byte allocation 09-23 10:07:52.024: INFO/dalvikvm-heap(334): Grow heap (frag case) to 5.836MB for 2097168-byte allocation 09-23 10:08:09.844: INFO/dalvikvm-heap(334): Grow heap (frag case) to 8.836MB for 4194320-byte allocation 09-23 10:08:09.864: INFO/ActivityManager(59): Process com.android.mms (pid 227) has died. 09-23 10:08:45.984: INFO/dalvikvm-heap(334): Forcing collection of SoftReferences for 8388624-byte allocation 09-23 10:08:46.033: ERROR/dalvikvm-heap(334): Out of memory on a 8388624-byte allocation. 09-23 10:08:46.033: INFO/dalvikvm(334): "AsyncTask #1" prio=5 tid=7 RUNNABLE 09-23 10:08:46.033: INFO/dalvikvm(334): | group="main" sCount=0 dsCount=0 s=N obj=0x43e54fd8 self=0x224d58 09-23 10:08:46.033: INFO/dalvikvm(334): | sysTid=340 nice=10 sched=0/0 cgrp=bg_non_interactive handle=2248344 09-23 10:08:46.033: INFO/dalvikvm(334): | schedstat=( 1248172861 2043417240 1093 ) 09-23 10:08:46.033: INFO/dalvikvm(334): at org.apache.http.util.CharArrayBuffer.expand(CharArrayBuffer.java:~59) 09-23 10:08:46.033: INFO/dalvikvm(334): at org.apache.http.util.CharArrayBuffer.append(CharArrayBuffer.java:77) 09-23 10:08:46.033: INFO/dalvikvm(334): at org.apache.http.util.EntityUtils.toString(EntityUtils.java:136) 09-23 10:08:46.033: INFO/dalvikvm(334): at org.apache.http.util.EntityUtils.toString(EntityUtils.java:146) 09-23 10:08:46.033: INFO/dalvikvm(334): at org.apache.http.impl.client.BasicResponseHandler.handleResponse(BasicResponseHandler.java:76) 09-23 10:08:46.033: INFO/dalvikvm(334): at org.apache.http.impl.client.BasicResponseHandler.handleResponse(BasicResponseHandler.java:59) 09-23 10:08:46.033: INFO/dalvikvm(334): at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:657) 09-23 10:08:46.033: INFO/dalvikvm(334): at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:627) 09-23 10:08:46.033: INFO/dalvikvm(334): at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:616) 09-23 10:08:46.033: INFO/dalvikvm(334): at uk.co.dodec.rcgpapp.helper.HttpHelper.getUpdates(HttpHelper.java:172) 09-23 10:08:46.033: INFO/dalvikvm(334): at uk.co.dodec.rcgpapp.SplashScreen.getUpdate(SplashScreen.java:155) 09-23 10:08:46.033: INFO/dalvikvm(334): at uk.co.dodec.rcgpapp.SplashScreen$getUpdates.doInBackground(SplashScreen.java:126) 09-23 10:08:46.033: INFO/dalvikvm(334): at uk.co.dodec.rcgpapp.SplashScreen$getUpdates.doInBackground(SplashScreen.java:1) 09-23 10:08:46.043: INFO/dalvikvm(334): at android.os.AsyncTask$2.call(AsyncTask.java:185) 09-23 10:08:46.043: INFO/dalvikvm(334): at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:305) 09-23 10:08:46.043: INFO/dalvikvm(334): at java.util.concurrent.FutureTask.run(FutureTask.java:137) 09-23 10:08:46.043: INFO/dalvikvm(334): at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1068) 09-23 10:08:46.043: INFO/dalvikvm(334): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:561) 09-23 10:08:46.043: INFO/dalvikvm(334): at java.lang.Thread.run(Thread.java:1096) 09-23 10:10:37.353: WARN/dalvikvm(334): threadid=7: thread exiting with uncaught exception (group=0x4001d800) 09-23 10:10:37.375: ERROR/AndroidRuntime(334): FATAL EXCEPTION: AsyncTask #1 09-23 10:10:37.375: ERROR/AndroidRuntime(334): java.lang.RuntimeException: An error occured while executing doInBackground() 09-23 10:10:37.375: ERROR/AndroidRuntime(334): at android.os.AsyncTask$3.done(AsyncTask.java:200) 09-23 10:10:37.375: ERROR/AndroidRuntime(334): at java.util.concurrent.FutureTask$Sync.innerSetException(FutureTask.java:273) 09-23 10:10:37.375: ERROR/AndroidRuntime(334): at java.util.concurrent.FutureTask.setException(FutureTask.java:124) 09-23 10:10:37.375: ERROR/AndroidRuntime(334): at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:307) 09-23 10:10:37.375: ERROR/AndroidRuntime(334): at java.util.concurrent.FutureTask.run(FutureTask.java:137) 09-23 10:10:37.375: ERROR/AndroidRuntime(334): at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1068) 09-23 10:10:37.375: ERROR/AndroidRuntime(334): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:561) 09-23 10:10:37.375: ERROR/AndroidRuntime(334): at java.lang.Thread.run(Thread.java:1096) 09-23 10:10:37.375: ERROR/AndroidRuntime(334): Caused by: java.lang.OutOfMemoryError 09-23 10:10:37.375: ERROR/AndroidRuntime(334): at org.apache.http.util.CharArrayBuffer.expand(CharArrayBuffer.java:59) 09-23 10:10:37.375: ERROR/AndroidRuntime(334): at org.apache.http.util.CharArrayBuffer.append(CharArrayBuffer.java:77) 09-23 10:10:37.375: ERROR/AndroidRuntime(334): at org.apache.http.util.EntityUtils.toString(EntityUtils.java:136) 09-23 10:10:37.375: ERROR/AndroidRuntime(334): at org.apache.http.util.EntityUtils.toString(EntityUtils.java:146) 09-23 10:10:37.375: ERROR/AndroidRuntime(334): at org.apache.http.impl.client.BasicResponseHandler.handleResponse(BasicResponseHandler.java:76) 09-23 10:10:37.375: ERROR/AndroidRuntime(334): at org.apache.http.impl.client.BasicResponseHandler.handleResponse(BasicResponseHandler.java:59) 09-23 10:10:37.375: ERROR/AndroidRuntime(334): at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:657) 09-23 10:10:37.375: ERROR/AndroidRuntime(334): at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:627) 09-23 10:10:37.375: ERROR/AndroidRuntime(334): at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:616) 09-23 10:10:37.375: ERROR/AndroidRuntime(334): at uk.co.dodec.rcgpapp.helper.HttpHelper.getUpdates(HttpHelper.java:172) 09-23 10:10:37.375: ERROR/AndroidRuntime(334): at uk.co.dodec.rcgpapp.SplashScreen.getUpdate(SplashScreen.java:155) 09-23 10:10:37.375: ERROR/AndroidRuntime(334): at uk.co.dodec.rcgpapp.SplashScreen$getUpdates.doInBackground(SplashScreen.java:126) 09-23 10:10:37.375: ERROR/AndroidRuntime(334): at uk.co.dodec.rcgpapp.SplashScreen$getUpdates.doInBackground(SplashScreen.java:1) 09-23 10:10:37.375: ERROR/AndroidRuntime(334): at android.os.AsyncTask$2.call(AsyncTask.java:185) 09-23 10:10:37.375: ERROR/AndroidRuntime(334): at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:305) 09-23 10:10:37.375: ERROR/AndroidRuntime(334): ... 4 more 09-23 10:10:37.393: WARN/ActivityManager(59): Force finishing activity uk.co.dodec.rcgpapp/.SplashScreen
我试过跟不上工作了
HttpResponse r = httpclient.execute(httppost); HttpEntity entity = r.getEntity(); InputStream in = new ByteArrayInputStream(EntityUtils.toByteArray(entity)); File fl = new File(Environment.getDataDirectory().toString() + "/data/" + context.getPackageName() + "/" + FOLDER_NAME); if(!fl.exists()) fl.mkdir(); String PATH = Environment.getDataDirectory().toString() + "/data/" + context.getPackageName() + "/" + FOLDER_NAME + "/" + "update.xml"; FileOutputStream f = new FileOutputStream(PATH); byte[] buffer = new byte[1024]; int len1 = 0; while ((len1 = in.read(buffer)) > 0) { f.write(buffer, 0, len1); } f.close();
这确实是一个问题：不要这样做。 您应该将响应写入文件或解析流，但绝对不要尝试生成2.3 MB的字符串。 编写一个响应处理程序，返回响应后面的HttpEntity ，然后使用getContent方法获取InputStream，然后将其保存到文件中，然后处理该文件。