当应用程序在后台时，意图服务在android 9上正常运行

Question

adb shell am broadcast -a android.intent.action.TEST --es maxCountValue 10 -n com.example.servicedemo/.MyReceiver
enter code here

class MyReceiver : BroadcastReceiver() {
    override fun onReceive(context: Context?, intent: Intent?) {
        Toast.makeText(context, "CompleteReceiver", Toast.LENGTH_LONG).show()
        if (intent!!.action.equals("android.intent.action.TEST")) {
            val mIntent = Intent(context, MyIntentService::class.java).apply {
                Log.v("MyIntentService", intent.data.toString())
                this.putExtra("maxCountValue", 100)
            }
            context?.startService(mIntent)
        }
    }
}

意向服务

private const val SERVICE_NAME = "MyIntentService"

class MyIntentService : IntentService(SERVICE_NAME) {
    private val handler = Handler()

    override fun onCreate() {
        super.onCreate()
        showToast("Job Execution Started")
    }

    override fun onStartCommand(intent: Intent?, flags: Int, startId: Int): Int {
        showToast("Job Execution onStartCommand")
        return super.onStartCommand(intent, flags, startId)
    }

    override fun onDestroy() {
        super.onDestroy()
        showToast("Job Execution onDestroy")
    }
    override fun onHandleIntent(intent: Intent?) {
        val maxCount = intent!!.getIntExtra("maxCountValue", -1)

        for (i in 0 until maxCount) {
            Log.d(SERVICE_NAME, "onHandleWork: The number is: $i")
            try {
                Thread.sleep(100)
            } catch (e: InterruptedException) {
                Log.d(SERVICE_NAME, "Exception: ")
                e.printStackTrace()
            }
        }
    }

    private fun showToast(msg: String) {
        handler.post {
            Toast.makeText(this@MyIntentService, msg, Toast.LENGTH_LONG).show()
        }
    }
}

舱单：

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

        <receiver android:name=".MyReceiver">
            <intent-filter>
                <action android:name="android.intent.action.TEST" />
            </intent-filter>
        </receiver>

Answer 1

“出于服务限制的目的，后台的定义与内存管理使用的定义不同；应用程序可能在后台与内存管理有关，但在前台与它启动服务的能力有关。”

-

https://developer.android.com/about/versions/oreo/background