什么是IntentService

IntentService是为简化Service使用而生的.Service的执行默认是在主线程中,一般都需要另外再创建线程来执行任务,而使用IntentService就省去了自己创建线程的工作.

创建IntentService

1. 在工程目录中单击右键,选择“New>Service>Service(IntentService)”

   
   

2. 在窗口中设置IntentService名称(其他设置保持默认即可)

   
   
3. 创建后的IntentService比较繁杂,此处就不列出了.
4. 查看AndroidManifest.xml文件,里面应该已经增加了如下Service配置.

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

启动Service样例

1. Service代码:MyIntentService.kt

class MyIntentService : IntentService("MyService") {
    override fun onHandleIntent(intent: Intent?) {
        Log.d("MyService", "onHandleIntent")
        study()
    }

    private fun study() {
        for (index in 1..10) {
            Log.d("MyService", "我在学习，我在学习，没偷懒")
            Thread.sleep(2000)
        }
    }

    override fun onCreate() {
        Log.d("MyService", "onCreate")
        super.onCreate()
    }

    override fun onStartCommand(intent: Intent?, flags: Int, startId: Int): Int {
        Log.d("MyService", "onStartCommand")
        return super.onStartCommand(intent, flags, startId)
    }

    override fun onDestroy() {
        Log.d("MyService", "onDestroy")
        super.onDestroy()
    }
}

2. 调用代码

class MainActivity : AppCompatActivity() {
    private lateinit var serviceIntent: Intent
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)

        //启动Service
        serviceIntent = Intent(this, MyIntentService::class.java)
        startService(serviceIntent)
    }

    override fun onDestroy() {
        super.onDestroy()
        //停止Service
        stopService(serviceIntent)
    }
}

完整源代码

https://gitee.com/cxyzy1/AndroidIntentServiceDemo