[移动开发]Java调用协程小例子

build.gradle写入依赖

implementation 'org.jetbrains.kotlinx:kotlinx-coroutines-core:1.5.0'
implementation 'org.jetbrains.kotlinx:kotlinx-coroutines-android:1.5.0'

kotlin

import android.util.Log
import androidx.lifecycle.ViewModel
import androidx.lifecycle.viewModelScope
import kotlinx.coroutines.CoroutineScope
import kotlinx.coroutines.Dispatchers
import kotlinx.coroutines.SupervisorJob
import kotlinx.coroutines.launch

object Tools {
    private val viewModelJob = SupervisorJob()

    private val uiScope = CoroutineScope(Dispatchers.Main + viewModelJob)
    private val workScope = CoroutineScope(Dispatchers.IO + viewModelJob)
    @JvmStatic
    fun test(task:Runnable) {
        var str = "abc"

        workScope.launch {
            log(" str =  $str")

            log(" workScope.launch ${Thread.currentThread().name}")

            str = "cdefg"

            uiScope.launch {

                task.run()

                log(" str =  $str")
                log(" uiScope.launch ${Thread.currentThread().name}")
            }
        }
    }

    fun log(msg:String){
        Log.d("debug_tag",msg)
    }

}

java调用：

    public void test(View view) {
        Runnable runnable = new Runnable() {
            @Override
            public void run() {
                Log.d("debug_tag","java runnable " + Thread.currentThread().getName());
            }
        };


        Tools.test(runnable);
    }

运行结果如下：

2022-02-21 17:00:07.467 20320-20381/com.jetpack.paging D/debug_tag:  str =  abc
2022-02-21 17:00:07.468 20320-20381/com.jetpack.paging D/debug_tag:  workScope.launch DefaultDispatcher-worker-1
2022-02-21 17:00:07.470 20320-20320/com.jetpack.paging D/debug_tag: java runnable main
2022-02-21 17:00:07.471 20320-20320/com.jetpack.paging D/debug_tag:  str =  cdefg
2022-02-21 17:00:07.471 20320-20320/com.jetpack.paging D/debug_tag:  uiScope.launch main