java - 检查启动时启动的 IntentService 是否仍在运行

Question

进入 list :

<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />

进入应用:

<service android:name="Myservice"/>
<receiver android:name="com.myapp.Onstart">  <!-- Tested also only .Onstart -->
            <intent-filter>  
                <action android:name="android.intent.action.BOOT_COMPLETED" />  
            </intent-filter>  
</receiver>

启动.java:

package com.myapp;

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;


public class Onstart extends BroadcastReceiver {    

    @Override
    public void onReceive(Context context, Intent intent) {
        if (intent.getAction().equals("android.intent.action.BOOT_COMPLETED")){
            context.startService(new Intent(context, Myservice.class));
        }
    }
}

我的服务.java:

package com.myapp;

import android.app.IntentService;
import android.content.Intent;
import android.util.Log;

public class Myservice extends IntentService
{

    public Myservice() {
        super("Myservice");
    }

    @Override
    protected void onHandleIntent(Intent intent) {
        int n=0;
        while(true)
        {
            if (i==20) {
               stopSelf();
            }
            i = i++;
            Log.i("Test", "n."+n++);
            try {
                Thread.sleep(10000);
            }
            catch (InterruptedException e)
            { }
        }
    }

}

手动启动应用程序会显示 Main.java，我想知道那里(在 Main.java 中)我的 IntentService Myservice 是否仍在运行。怎么做？

Answer 1

虽然我知道您的问题是它是否正在运行，但我不明白您为什么需要知道。由于 IntentService 按需工作。

IntentService is a base class for Services that handle asynchronous requests (expressed as Intents) on demand. Clients send requests through startService(Intent) calls; the service is started as needed, handles each Intent in turn using a worker thread, and stops itself when it runs out of work.

此外，从 Context.startService(Intent) 调用文档:

If the service is being started or is already running, the ComponentName of the actual service that was started is returned; else if the service does not exist null is returned.

如果必须的话，可以检查startService(Intent)的返回参数。

编辑:您似乎需要一个完全由您处理的启动服务，而不是系统。这将允许您拥有自己的停止条件。请引用Services和 Services Guide关于如何使用它们。

引用资料:
IntentService
startService(Intent service)
Services
Services Guide