Android JAVA - 服务在一段时间后返回OutOfMemoryError异常 [英] Android JAVA - Service return OutOfMemoryError exception after some while
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问题描述
我正在开发我的第一个Android应用程序。我已经创建了一个Service类，其作用是检查外部网页上是否有任何新信息。 HTTP请求和服务正常工作，但过了一段时间我得到这些 OutOfMemoryError 。
I am developing my first android app. I have been created a Service class which role is to check if any new information on an external webpage. The HTTP request and service work as i should, but after a while I get these OutOfMemoryError.
是否有人能够看看服务收集所有内存的位置？
Are someone able to see where the Service gather all that memory?
错误消息1。
java.lang.OutOfMemoryError: pthread_create (stack size 16384 bytes) failed: Try again
at java.lang.VMThread.create(Native Method)
at java.lang.Thread.start(Thread.java:1029)
at org.apache.http.impl.conn.tsccm.AbstractConnPool.enableConnectionGC(AbstractConnPool.java:140)
at org.apache.http.impl.conn.tsccm.ThreadSafeClientConnManager.createConnectionPool(ThreadSafeClientConnManager.java:120)
at org.apache.http.impl.conn.tsccm.ThreadSafeClientConnManager.(ThreadSafeClientConnManager.java:98)
at com.loopj.android.http.AsyncHttpClient.(AsyncHttpClient.java:210)
at com.loopj.android.http.AsyncHttpClient.(AsyncHttpClient.java:149)
at com.loopj.android.http.AsyncHttpClient.(AsyncHttpClient.java:119)
at com.quickit.app.MyService.checkUpdates(MyService.java:89)
at com.quickit.app.MyService.access$1(MyService.java:75)
at com.quickit.app.MyService$TimeDisplayTimerTask$1.run(MyService.java:68)
at android.os.Handler.handleCallback(Handler.java:733)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:136)
at android.app.ActivityThread.main(ActivityThread.java:5105)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:792)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:608)
at dalvik.system.NativeStart.main(Native Method)
错误消息2。
java.lang.OutOfMemoryError: thread creation failed
at java.lang.VMThread.create(Native Method)
at java.lang.Thread.start(Thread.java:1050)
at java.util.concurrent.ThreadPoolExecutor.addWorker(ThreadPoolExecutor.java:913)
at java.util.concurrent.ThreadPoolExecutor.execute(ThreadPoolExecutor.java:1295)
at java.util.concurrent.AbstractExecutorService.submit(AbstractExecutorService.java:81)
at com.loopj.android.http.AsyncHttpClient.sendRequest(AsyncHttpClient.java:893)
at com.loopj.android.http.AsyncHttpClient.post(AsyncHttpClient.java:688)
at com.loopj.android.http.AsyncHttpClient.post(AsyncHttpClient.java:671)
at com.loopj.android.http.AsyncHttpClient.post(AsyncHttpClient.java:658)
at com.quickit.app.MyService.checkUpdates(MyService.java:90)
at com.quickit.app.MyService.access$1(MyService.java:75)
at com.quickit.app.MyService$TimeDisplayTimerTask$1.run(MyService.java:68)
at android.os.Handler.handleCallback(Handler.java:725)
at android.os.Handler.dispatchMessage(Handler.java:92)
at android.os.Looper.loop(Looper.java:213)
at android.app.ActivityThread.main(ActivityThread.java:5092)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:797)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:564)
at dalvik.system.NativeStart.main(Native Method)
我的服务类。
public class MyService extends Service {
boolean login = false;
// constant
public static final long NOTIFY_INTERVAL = 10 * 1000; // 10 seconds
String address = Utilities.getAPIUrl();
// run on another Thread to avoid crash
private Handler mHandler = new Handler();
// timer handling
private Timer mTimer = null;
@Override
public IBinder onBind(Intent intent) {
return null;
}
@Override
public void onCreate() {
SharedPreferences prefs = getSharedPreferences("com.quickit.app", Context.MODE_PRIVATE);
login = prefs.getBoolean("login", false);
// cancel if already existed
if(mTimer != null) {
mTimer.cancel();
} else {
// recreate new
mTimer = new Timer();
}
// schedule task
mTimer.scheduleAtFixedRate(new TimeDisplayTimerTask(), 0, NOTIFY_INTERVAL);
}
public class TimeDisplayTimerTask extends TimerTask {
@Override
public void run() {
// run on another thread
mHandler.post(new Runnable() {
@Override
public void run() {
if(login) {
checkUpdates();
}
}
});
}
}
private void checkUpdates() {
final SharedPreferences prefs = getSharedPreferences("com.quickit.app", Context.MODE_PRIVATE);
final String from_id = prefs.getInt("user", 0)+"";
final String lastCheck = prefs.getString("last_check", "0");
RequestParams params = new RequestParams();
params.put("type", "get_ask_questions");
params.put("fromid", from_id);
params.put("last_check", lastCheck);
AsyncHttpClient client = new AsyncHttpClient();
client.post(address, params, new AsyncHttpResponseHandler() {
@Override
public void onSuccess(String response) {
try {
notification(response);
} catch (JSONException e) {
e.printStackTrace();
}
}
});
}
推荐答案
您的代码不断创建每次计时器到期时都有新的AsyncHttpClient对象！如果对象永远不会完成它的工作，在某些时候，你将耗尽内存。
Your code is constantly creating a new AsyncHttpClient object every time that timer expires! If the object never finishes its work, at some point, you will run out of memory.
由于你只是定期检查更新，你应该使AsyncHttpClient对象静态只需重复使用它。
Since you are just periodically checking for updates, you should make the AsyncHttpClient object static and just reuse it.
查看 http ：//loopj.com/android-async-http/ ，特别是推荐用法部分。
Look at http://loopj.com/android-async-http/ specifically, the Recommended Usage section.
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