我是新来的,我对Android服务有疑问。由于某种原因,我的服务没有启动。并没有在logcat中给出任何错误。我用了
startService(new Intent(getApplicationContext(),MyResultsService.class));
在主要活动中调用服务(MyResultsService.class)。
此外,这是MyResultsService.class:
package com.example.myapp;
import android.app.Service;
import android.content.Intent;
import android.os.IBinder;
import android.util.Log;
public class MyResultsService extends Service{
public UpdateMyResults updater;
public boolean stopThread = false;
@Override
public void onCreate() {
// TODO Auto-generated method stub
super.onCreate();
Log.d(getPackageName(), "Created MyResultsService");
}
@Override
public synchronized int onStartCommand(Intent intent, int flags, int startId) {
// TODO Auto-generated method stub
Log.d(getPackageName(), "Starting...");
if (!updater.isAlive()){
updater = new UpdateMyResults();
Log.d(getPackageName(), "New updater thread...");
}
return super.onStartCommand(intent, flags, startId);
}
@Override
public synchronized void onDestroy() {
// TODO Auto-generated method stub
stopThread = true;
Log.d(getPackageName(), "Destroying MyResultsService");
try {
updater.join();
Log.d(getPackageName(), "Closed updater thread");
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
super.onDestroy();
}
@Override
public IBinder onBind(Intent intent) {
// TODO Auto-generated method stub
return null;
}
private class UpdateMyResults extends Thread{
static final long DELAY = 30000;
@Override
public void run() {
while (!stopThread){
try {
//Do stuff and pause
Log.d(getName(), "Running");
Thread.sleep(DELAY);
} catch (InterruptedException e) {
// Interrupt
e.printStackTrace();
}
}//end while
}//end run
}//end UpdateMyResults
}
我的xml清单:
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.myapp"
android:versionCode="1"
android:versionName="1.0">
<uses-sdk android:minSdkVersion="14" android:targetSdkVersion="17" />
<application
android:label="MyApp"
android:icon="@drawable/ic_launcher"
android:theme="@android:style/Theme.Holo.Light">
<activity
android:name=".MainActivity"
android:label="My App">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<service android:enabled="true" android:name="com.example.myapp.MYRESULTSSERVICE" />
</application>
</manifest>
非常感谢任何帮助,谢谢!
答案 0 :(得分:14)
<service android:enabled="true" android:name="com.example.myapp.MYRESULTSSERVICE" />
中的名称必须与您的班级完全匹配。尽量不要使用全部大写。
答案 1 :(得分:0)
尝试在清单文件中使用以下内容:
<service android:enabled="true" android:name="com.example.myapp.MyResultsService"/>
答案 2 :(得分:0)
将清单中的服务标签更改为以下内容。
<service android:enabled="true" android:name="com.example.myapp.MyResultsService" />
答案 3 :(得分:0)
您的清单的服务名称错误。它是 MYRESULTSSERVICE
,但您的服务类名称为MyResultsService
。尝试从MYRESULTSSERVICE
更改为MyResultsService
答案 4 :(得分:0)
Line 23, you are calling a method on a variable (updater) that has not been initialized yet, causing a NPE. – Alex Fu Jul 15 '13 at 16:03
并且你还没有开始使用线程。