Android-服务无法启动 [英] Android - Service does not start
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问题描述
我正在为我和我的班级同伴制作应用程序，用于检查新的作业和考试.它具有无法通过检查学校服务器(例如每5分钟一次)以检查文件和诸如此类的内容来更改文件大小的服务.我尝试了以下代码:
I am making app for me and my class mates, that checks for new homeworks and exams. It has service that may not be killed beacuse of checking school server (like every 5 minutes) for changed size of file with list of exams and stuff like this. I tried following code:
MayinActivity.java
MayinActivity.java
package com.test.simpleservice;
import android.app.ActivityManager;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import java.util.List;
public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//checking runings services - remove later
ActivityManager am = (ActivityManager)this.getSystemService(ACTIVITY_SERVICE);
List<ActivityManager.RunningServiceInfo> rs = am.getRunningServices(50);
String message = null;
for (int i=0; i<rs.size(); i++) {
ActivityManager.RunningServiceInfo
rsi = rs.get(i);
System.out.println("!!!!!!!!!!Service" + "Process " + rsi.process + " with component " + rsi.service.getClassName());
message = message + rsi.process;
}
Button btnStart = (Button) findViewById(R.id.startBtn);
btnStart.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
ServiceManager.startService(getApplicationContext());
}
});
}
}
MyServices.java
MyServices.java
package com.test.simpleservice;
import android.app.Service;
import android.content.Intent;
import android.os.IBinder;
import android.support.annotation.Nullable;
import android.widget.Toast;
public class MyServices extends Service {
private static final String LOGTAG = "MyServices";
@Override
public void onStart(Intent intent, int startId) {
System.out.println("start...");
//some code of your service starting,such as establish a connection,create a TimerTask or something else
Toast.makeText(this, "service start", Toast.LENGTH_LONG).show();
}
@Nullable
@Override
public IBinder onBind(Intent arg0) {
// TODO Auto-generated method stub
return null;
}
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
//this will start service
System.out.println("startcommand...");
Toast.makeText(this, "service startcomand", Toast.LENGTH_LONG).show();
return START_STICKY;
}
@Override
public void onDestroy() {
//this will NOT kill service
//super.onDestroy();
Toast.makeText(this, "task destroyed", Toast.LENGTH_LONG).show();
Intent in = new Intent();
in.setAction("PreventKilling");
sendBroadcast(in);
}
@Override
public void onTaskRemoved(Intent intent){
Toast.makeText(this, "task removed", Toast.LENGTH_LONG).show();
intent = new Intent(this, this.getClass());
startService(intent);
}
}
Reciever.java
Reciever.java
package com.test.simpleservice;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.util.Log;
public class Receiver extends BroadcastReceiver {
private static final String LOGTAG = "Receiver";
public void onReceive(Context context, Intent intent) {
if (Intent.ACTION_BOOT_COMPLETED.equals(intent.getAction())) {
Intent serviceIntent = new Intent(context, MyServices.class);
context.startService(serviceIntent);
}
Log.d(LOGTAG, "ServiceDestroy onReceive...");
Log.d(LOGTAG, "action:" + intent.getAction());
Log.d(LOGTAG, "ServiceDestroy auto start service...");
ServiceManager.startService(context);
}
}
ServiceManager
ServiceManager
package com.test.simpleservice;
import android.content.Context;
import android.content.Intent;
import android.util.Log;
public class ServiceManager {
private static final String LOGTAG = "ServiceManager";
public static void startService(Context context) {
Log.i(LOGTAG, "ServiceManager.startSerivce()...");
Intent intent = new Intent(MyServices.class.getName());
intent.setPackage("com.test.simpleservice");
context.startService(intent);
}
}
AndroidManifest.xml
AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.test.simpleservice">
<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:supportsRtl="true"
android:theme="@style/AppTheme">
<activity android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<service android:name=".MyServices" />
<receiver android:name=".Receiver" >
<intent-filter>
<action android:name="PreventKilling" />
</intent-filter>
<intent-filter>
<action android:name="android.intent.action.RECIEVE_BOOT_COMPLETED" />
<action android:name="android.intent.action.QUICKBOOT_POWERON" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</receiver>
</application>
</manifest>
activity_main.xml
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context="com.test.simpleservice.MainActivity">
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/start_btn"
android:id="@+id/startBtn"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true" />
</RelativeLayout>
当我运行该应用程序并单击启动"按钮时，该服务将不会启动-没有祝酒，没有日志，在设置->应用程序->服务中什么也没有.为什么?在不引起通知的情况下进行更好的处理的更好的方法吗?
When I run the app and click button "start", the service wont start - no toasts, no logs, nothing in setting->apps->services. Why? Any better way to make unkillable process without anoying notification?
logcat 最后几行是因为之前只是列出的服务:
logcat last few lines becouse that before are just listed services:
01-16 14:10:15.567 13753-13772/com.test.simpleservice I/OpenGLRenderer: Initialized EGL, version 1.4
01-16 14:10:15.567 13753-13772/com.test.simpleservice W/OpenGLRenderer: Failed to choose config with EGL_SWAP_BEHAVIOR_PRESERVED, retrying without...
01-16 14:10:15.587 13753-13772/com.test.simpleservice D/OpenGLRenderer: Enabling debug mode 0
01-16 14:10:17.597 13753-13753/com.test.simpleservice I/ServiceManager: ServiceManager.startSerivce()...
还有一个问题:该应用在启动后会启动吗?如果没有，我做错了什么?
And one more question: will this app start after boot? If not, what did I do wrong?
为我的英语不好对不起
推荐答案
Intent intent = new Intent(context, MyServices.class);
intent.setPackage("com.test.simpleservice");
context.startService(intent);
因为您的上下文是:
public static void startService(Context context)
这里:
public void onReceive(Context context, Intent intent)
对于Intent名称-> 意图
这篇关于Android-服务无法启动的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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