如何立即開始執行 Kotlin Coroutine

Question

我想立即啟動一個協程。 我有一段代碼：

class SampleActivity : AppCompatActivity(), CoroutineScope {

    private var job: Job = Job()
    override val coroutineContext: CoroutineContext
        get() = Dispatchers.Main + job

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)

        Log.d("SampleActivity", "Before launch")

        launch {
            Log.d("SampleActivity", "Inside coroutine")
        }

        Log.d("SampleActivity", "After launch")
    }
}

輸出是：

Before launch
After launch
Inside coroutine

是否可以按以下順序實現輸出？

Before launch
Inside coroutine
After launch

Answer 1

嘗試使用以下命令啟動它：

launch(Dispatchers.Main.immediate)

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