Android Kotlin Coroutines ktxÀ©Õ¹

implementation "androidx.lifecycle:lifecycle-runtime-ktx:2.2.0"

implementation 'androidx.lifecycle:lifecycle-viewmodel-ktx:2.3.1'

 implementation 'androidx.lifecycle:lifecycle-livedata-ktx:2.2.0'

class MainActivity : AppCompatActivity() {

    val user: LiveData<String> = liveData {
        //Ä£ÄâÍøÂçÇëÇó
        var user = getUser()

        if (user == "ok") {
            //Ä£ÄâÇëÇó³É¹¦
            emit("ok")
        } else {
            //Ä£ÄâÇëÇóʧ°Ü
            emit("failed")
        }
    }

    /**
     * Ä£ÄâÍøÂçÇëÇó
     */
    suspend fun getUser(): String {
        var ret = withContext(Dispatchers.Default) {
            "ok"
        }
        return ret
    }

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)

        user.observe(this, {
            Log.d("yy--", "name1:$it")
        })

    }
}