的onCreate（）的服务从来没有所谓的 [英] onCreate() in service never called

问题描述

我想要实现开/关处理屏幕的服务。要做到这一点，我已经创建 BootReceiver 被称为在引导完成，在我开始我的服务。

然而，的OnCreate 永远不会被调用，这是为什么？

当我打印程序我从来没有看到的onCreate 的日志记录，即使我看到 onStartCommand 的日志。这怎么可能？请帮我理解这一点。

这是 BootReceiver 被称为最开始：

 公共类BootReceiver扩展广播接收器{    @覆盖
    公共无效的onReceive（上下文的背景下，意图意图）{        Log.w（TAG，BootReceiver）;        意向书的服务=新意图（背景下，ScreenListenerService.class）;
            context.startService（服务）;    }}
 

这是该服务：

 公共类ScreenListenerService延伸服务{
    公共无效的onCreate（）{
        super.onCreate（）;
        Log.w（TAG，ScreenListenerService ---在OnCreate）;
    }
     @覆盖
     公众诠释onStartCommand（意向意图，诠释标志诠释startId）{            Log.w（TAG，ScreenListenerService ---在onStart）;
        }    @覆盖
    公众的IBinder onBind（意向意图）{
        // TODO自动生成方法存根
        返回null;
    }}
 

和清单：

 ＆LT;服务机器人：名字=。ScreenListenerService＆GT;＆LT; /服务＆GT;        ＆lt;接收机器人：名字=。BootReceiver＆GT;
            ＆所述;意图滤光器＆gt;
                ＆lt;作用机器人：名字=android.intent.action.BOOT_COMPLETED/＆GT;
                 ＆lt;作用机器人：名字=android.intent.action.ACTION_EXTERNAL_APPLICATIONS_AVAILABLE/＆GT;
            ＆所述; /意图滤光器＆gt;
        ＆LT; /接收器＆GT;
 

解决方案

修改

 公共无效的onCreate（）{
    super.onCreate（）;
    Log.w（TAG，ScreenListenerService ---在OnCreate）;
}
 

到

 公共无效的onCreate（）{
    super.onCreate（）;
    Log.w（TAG，ScreenListenerService ---在OnCreate）;
}
 

Java是大小写敏感的，所以的OnCreate（）！= 的onCreate（）

I want to implement a service that handle screen on/off. To do so, I have created BootReceiver that is called at boot completed and within I start my service.

However, OnCreate is never called, why?.

When I print the log of the program I never see the onCreate's log even though I see the onStartCommand's log. How is this possible? Please help me to understand this.

This is BootReceiver that is called in the very beginning:

public class BootReceiver extends BroadcastReceiver {

    @Override
    public void onReceive(Context context, Intent intent) {

        Log.w("TAG", "BootReceiver");

        Intent service = new Intent(context, ScreenListenerService.class);
            context.startService(service);

    }

}

This is the service:

public class ScreenListenerService extends Service {


    public void OnCreate(){
        super.onCreate();
        Log.w("TAG", "ScreenListenerService---OnCreate ");
    }


     @Override
     public int onStartCommand(Intent intent, int flags, int startId) {

            Log.w("TAG", "ScreenListenerService---onStart ");


        }

    @Override
    public IBinder onBind(Intent intent) {
        // TODO Auto-generated method stub
        return null;
    }

}

And the manifest:

<service android:name=".ScreenListenerService"></service>

        <receiver android:name=".BootReceiver">
            <intent-filter>
                <action android:name="android.intent.action.BOOT_COMPLETED" />
                 <action android:name="android.intent.action.ACTION_EXTERNAL_APPLICATIONS_AVAILABLE" />
            </intent-filter>
        </receiver>

解决方案

Change:

public void OnCreate(){
    super.onCreate();
    Log.w("TAG", "ScreenListenerService---OnCreate ");
}

to:

public void onCreate(){
    super.onCreate();
    Log.w("TAG", "ScreenListenerService---OnCreate ");
}

Java is case sensitive, so OnCreate() != onCreate()

这篇关于的onCreate（）的服务从来没有所谓的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！