安卓 java。lang.IllegalThreadStateException:线程已启动,但只有1个线程
当我想启动一个线程时,它只是在Android棉花糖和更低版本上崩溃。我有一个自动启动脚本,它调用我的支票。启动时的java脚本已完成。在安卓N上它可以工作,但在安卓棉花糖和更低版本上它不能工作。。。它告诉我一个线程已经启动,而该线程是唯一一个被称为。。。我尝试过增加睡眠(100);并检查线程是否处于活动状态,但没有任何工作。。。我怎样才能修好它
--------- beginning of crash
E/AndroidRuntime( 2436): FATAL EXCEPTION: main
E/AndroidRuntime( 2436): Process: com.company.app, PID: 2436
E/AndroidRuntime( 2436): java.lang.IllegalThreadStateException: Thread already started
E/AndroidRuntime( 2436): at java.lang.Thread.checkNotStarted(Thread.java:849)
E/AndroidRuntime( 2436): at java.lang.Thread.start(Thread.java:1059)
E/AndroidRuntime( 2436): at com.company.app.CheckRoosterWijziging$SayHello$1.run(CheckRoosterWijziging.java:94)
E/AndroidRuntime( 2436): at 安卓.os.Handler.handleCallback(Handler.java:739)
E/AndroidRuntime( 2436): at 安卓.os.Handler.dispatchMessage(Handler.java:95)
E/AndroidRuntime( 2436): at 安卓.os.Looper.loop(Looper.java:135)
E/AndroidRuntime( 2436): at 安卓.app.ActivityThread.main(ActivityThread.java:5254)
E/AndroidRuntime( 2436): at java.lang.reflect.Method.invoke(Native Method)
E/AndroidRuntime( 2436): at java.lang.reflect.Method.invoke(Method.java:372)
E/AndroidRuntime( 2436): at com.安卓.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)
E/AndroidRuntime( 2436): at com.安卓.internal.os.ZygoteInit.main(ZygoteInit.java:698)
我的帖子:
Thread wijzigingenThread = new Thread() {
@Override
public void run() {
try {
sleep(100);
try {
System.out.println("Hello test");
} catch (Exception e) {
e.printStackTrace();
}
} catch (InterruptedException e) {
e.printStackTrace();
}
}
};
自动启动。爪哇
package com.company.app;
import 安卓.content.BroadcastReceiver;
import 安卓.content.Context;
import 安卓.content.Intent;
import 安卓.content.SharedPreferences;
import 安卓.preference.PreferenceManager;
public class autostart extends BroadcastReceiver {
public void onReceive(Context arg0, Intent arg1) {
Intent intent = new Intent(arg0, CheckRoosterWijziging.class);
arg0.startService(intent);
}
}
CheckRoosterWijziging。爪哇
package com.company.app;
import 安卓.app.Notification;
import 安卓.app.NotificationManager;
import 安卓.app.Service;
import 安卓.content.Context;
import 安卓.content.Intent;
import 安卓.content.SharedPreferences;
import 安卓.graphics.Typeface;
import 安卓.os.Binder;
import 安卓.os.Bundle;
import 安卓.os.Handler;
import 安卓.os.IBinder;
import 安卓.os.Looper;
import 安卓.support.v4.app.NotificationCompat;
import 安卓.text.SpannableStringBuilder;
import 安卓.text.style.ForegroundColorSpan;
import 安卓.text.style.StrikethroughSpan;
import 安卓.text.style.StyleSpan;
import 安卓.util.Log;
import 安卓.widget.Toast;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLConnection;
import java.net.UnknownHostException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Comparator;
import java.util.Date;
import java.util.GregorianCalendar;
import java.util.HashMap;
import java.util.Locale;
import java.util.Map;
import java.util.TimeZone;
import java.util.Timer;
import java.util.TimerTask;
import java.util.TreeMap;
import java.util.regex.Pattern;
public class CheckRoosterWijziging extends Service {
private NotificationManager mNM;
private int NOTIFICATION = 10;
Handler handler;
MainActivity main = MainActivity.getMain();
final int NOTIFICATION_ID = 10;
NotificationManager notificationManager;
static CheckRoosterWijziging checkRoosterWijziging;
public class LocalBinder extends Binder {CheckRoosterWijziging getService() {return CheckRoosterWijziging.this;}}
@Override
public void onCreate() {
handler = new Handler(Looper.getMainLooper());
checkRoosterWijziging = this;
mNM = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
System.out.println("Service");
}
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
Log.i("CheckRoosterWijziging", "Received start id " + startId + ": " + intent);
showNotification();
return START_NOT_STICKY;
}
@Override
public void onDestroy() {
mNM.cancel(NOTIFICATION);
Toast.makeText(this, "Stopped", Toast.LENGTH_SHORT).show();
}
@Override
public IBinder onBind(Intent intent) {return mBinder;}
private final IBinder mBinder = new LocalBinder();
class SayHello extends TimerTask {
public void run() {
handler.post(new Runnable() {
public void run() {
wijzigingenThread.start();
}
});
}
}
private void showNotification() {
Timer timer = new Timer();
timer.schedule(new SayHello(), 15000, 15000);
}
# 1 楼答案
计时器在同一个
Thread
对象上多次调用start()
,这导致了IllegalThreadStateException
。在调用start之前,可以使用一个标志指示线程是否已经启动,或者检查Thread.getState()
。例如:# 2 楼答案
通过将新线程()移动到原始Wijziging线程所在的位置来修复。调用了start()
所以我做了以下几件事:
原件:
新的:
感谢@JoeC帮助我,为我指明了正确的方向