判断app中是否开启了某个Service

关于Service介绍

官方文档（镇楼）

实现需求

Tips：先赞后看，人生灿烂！

第一步：首先创建一个Service

在onStartCommand（）方法中我只让它弹个吐司，表明服务启动了

 /**
 * @data on 4/27/21 10:03 AM
 * @auther KC
 * @describe 定义一个简单的服务
 */
class ExampleService : Service() {
    private var startMode: Int = 0             // indicates how to behave if the service is killed
    private var binder: IBinder? = null        // interface for clients that bind
    private var allowRebind: Boolean = false   // indicates whether onRebind should be used

    override fun onCreate() {
        // The service is being created
    }

    override fun onStartCommand(intent: Intent?, flags: Int, startId: Int): Int {
        // The service is starting, due to a call to startService()
        Toast.makeText(this,"Service starting ...",Toast.LENGTH_SHORT).show()
        return startMode
    }

    override fun onBind(intent: Intent): IBinder? {
        // A client is binding to the service with bindService()
        return binder
    }

    override fun onUnbind(intent: Intent): Boolean {
        // All clients have unbound with unbindService()
        return allowRebind
    }

    override fun onRebind(intent: Intent) {
        // A client is binding to the service with bindService(),
        // after onUnbind() has already been called
    }

    override fun onDestroy() {
        // The service is no longer used and is being destroyed
    }
}

第二步：在AndroidManifest.xml文件中引入该ExampleService

提及一下exported这个属性，是指定该Service是否被其他app可以获取，这里的false就是指明，只有当前app可以获取到，不能被其他app获取。

<application>
...
    <service
       android:name=".service.ExampleService"
       android:exported="false" />
...
</application>

第三步：在Activity中处理逻辑

布局中三个按钮，点击分别代表：开启服务、判断是否开启服务、关闭服务。
主要用AM的getRunningSercices方法，来拿到系统中该app正在运行的Service列表，然后遍历它，看是否Service列表中的Name值是否包含ServiceName。

@Route(path = RouterPath.kotlin15)
class Kotlin15 : AppCompatActivity() {

    val intentExample by lazy {  //延迟初始化
        Intent(this, ExampleService::class.java)
    }

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        //绑定布局
        val vBinding = ActivityKotlin15Binding.inflate(layoutInflater)
        setContentView(vBinding.root)
        //点击事件
        vBinding.openService.setOnClickListener {
            startService(intentExample) //开启服务
        }
        vBinding.closeService.setOnClickListener {
            stopService(intentExample) //关闭服务
        }
        vBinding.isOpenService.setOnClickListener {
            Toast.makeText(
                this,
                isOpenedService(this, "ExampleService").toString(),
                Toast.LENGTH_SHORT
            ).show()
        }
    }
    //判断是否app开启了某个Service
    private fun isOpenedService(mContext: Context, className: String): Boolean {
        var isRunning = false;
        val systemService : ActivityManager = mContext.getSystemService(Context.ACTIVITY_SERVICE) as ActivityManager
        val serviceList: List<ActivityManager.RunningServiceInfo> = systemService
            .getRunningServices(30)
        if (serviceList.isEmpty()) {
            return false;
        }
        serviceList.forEach {
            if (it.service.className.contains(className)){
                isRunning = true
            }
        }
        return isRunning;
    }
}