标签: android-workmanager

我曾尝试将数据从Worker数据库保存到Room数据库.

版本:

• 工作运行时Ktx - android.arch.work:work-runtime-ktx:1.0.0-alpha02
• 房间 - android.arch.persistence.room:runtime:1.1.0和android.arch.persistence.room:compiler:1.1.0

MainActivity.kt

private fun runDataDownloadWork() {
        WorkManager.getInstance()
                .beginWith(dwElementTypesWork)
                .then(dwElementsWork)
                .enqueue()
        WorkManager.getInstance().getStatusById(dwElementsWork!!.id)
                .observe(this, Observer { workStatus ->
                    if (workStatus != null && workStatus.state.isFinished) {
                        Log.d("WorkManager", "dwElementsWork finished")
                    }
                })
    }

    private fun createWorkRequests() {
        dwElementsWork = OneTimeWorkRequestBuilder<DWElementsWork>()
                .addTag(DWElementsWork.TAG)
                .setConstraints(wifiConstraints)
                .build()
        dwElementTypesWork = OneTimeWorkRequestBuilder<DWElementTypesWork>()
                .addTag(DWElementTypesWork.TAG)
                .setConstraints(wifiConstraints)
                .build()
    }

DWElementsWork.kt

class DWElementsWork : Worker() {

    companion object {
        const val TAG = "dw_elements_work"
    }

    override fun doWork(): WorkerResult {

        val apiService: APIService = ServiceGenerator
            .createService(applicationContext, MyAPIService::class.java) …

我正在使用工作经理进行定期任务.我要执行单个工作实例

我的代码如下

  val workManager = WorkManager.getInstance()
  val callDataRequest = PeriodicWorkRequest.Builder(MyLoggerWork::class.java,
                15, TimeUnit.MINUTES)
                .addTag(worker)
                .build()
   workManager.enqueueUniquePeriodicWork(worker, ExistingPeriodicWorkPolicy.KEEP, callDataRequest)

我的工作人员记录如下

18/09/2018 03:18:19
18/09/2018 03:18:19
18/09/2018 03:18:19
18/09/2018 03:18:19

18/09/2018 03:37:18
18/09/2018 03:37:18
18/09/2018 03:37:18
18/09/2018 03:37:18

这是我的MyLoggerWork类

public class MyLoggerWork: Worker(){


override fun doWork(): Result {
    addlog()
    return Worker.Result.SUCCESS
}

private fun addlog() {

    try {

        val directory = File(Environment.getExternalStorageDirectory().path + "/", "Jobs")
        if (!directory.exists()) {
            directory.mkdir()
        }
        val file = File(directory.path, "jobs_.txt")
        if (!file.exists() && directory.exists()) {
            file.createNewFile()
        }
        try { …

由于以下错误,我现在的Android项目现在无法构建

AGPBI: {"kind":"error","text":"Program type already present: com.google.common.util.concurrent.ListenableFuture","sources":[{}],"tool":"D8"}
java.lang.RuntimeException: java.lang.RuntimeException: com.android.builder.dexing.DexArchiveMergerException: Error while merging dex archives: /Users/....
Program type already present: com.google.common.util.concurrent.ListenableFuture

我正在使用Android工作室版本

Android Studio 3.2
Build #AI-181.5540.7.32.5014246, built on September 17, 2018
JRE: 1.8.0_152-release-1136-b06 x86_64
JVM: OpenJDK 64-Bit Server VM by JetBrains s.r.o
Mac OS X 10.11.6

以下链接不太有帮助

Learn how to resolve the issue at https://developer.android.com/studio/build/dependencies#duplicate_classes.

我为触发此错误所做的更改如下: -

将我的tarke sdk version et.c从27增加到28

   compileSdkVersion = 28
   targetSdkVersion = 28
   minSdkVersion = 21
   buildToolsVersion = "28.0.2"
   supportLibVersion = "28.0.0"

将我的kotlin版本增加到 ext.kotlin_version = …

有人可以帮我找到我在哪里错了.我需要不断观察网络数据,并在工作人员发生数据更改时更新UI.请注意,这在升级到androidx之前有效.

这是一个工人类.

class TestWorker(val context: Context, val params: WorkerParameters): Worker(context, params){

    override fun doWork(): Result {
        Log.d(TAG, "doWork called")
        val networkDataSource = Injector.provideNetworkDataSource(context)
        networkDataSource.fetchData(false)

        return Worker.Result.SUCCESS
    }

    companion object {
        private const val TAG = "MY_WORKER"
    }

}

其名称如下:

fun scheduleRecurringFetchDataSync() {
    Log.d("FETCH_SCHEDULER", "Scheduling started")

    val fetchWork = PeriodicWorkRequest.Builder(TestWorker::class.java, 1, TimeUnit.MINUTES)
            .setConstraints(constraints())
            .build()
    WorkManager.getInstance().enqueue(fetchWork)
}

private fun constraints(): Constraints{
    return Constraints.Builder()
            .setRequiredNetworkType(NetworkType.CONNECTED)
            .setRequiresBatteryNotLow(true)
            .build()
}

我还有一个UserDao和UserRepository来获取和存储数据.我正在观察UserRepository中的网络数据,如下所示:

class UserRepository (
    private val userDao: UserDao,
    private val networkDataSource: NetworkDataSource,
    private val appExecutors: …

在PeriodicTimeRequest最小周期时间为15分。我想将它从 15 分钟减少到不到 15 分钟。我该怎么做？

在初始化工作管理器并创建任一任务后，如果我们在任务执行中使用任何插件，则无法识别并抛出错误，如下所示 MissingPluginException（在通道 lyokone/location 上找不到方法 getLocation 的实现）

实际代码：

Workmanager.executeTask((task, inputData) async {
  Location locationObject = Location(); 
  locationObject.getLocation(); 
  print(locationObject); 
  return Future.value(true); 
}

基本上，工作管理器任务中使用的任何其他插件似乎都无法识别。

我错过了什么，我需要重新注册我的所有插件吗？

I/flutter (16120): Location permission has error

I/flutter (16120): MissingPluginException(No implementation found for method serviceEnabled on channel lyokone/location)

我最近将旧应用程序的后台服务迁移到WorkManager。在最近的设备上（包括 sdk 22），它看起来不错，运行重复的工作单元并按预期在设备重新启动时安排它们。

问题是当我针对旧版本（旧在这里非常相关）进行测试时，Android sdk 14 是我的minSdkVersion. 顺便说一句，也WorkManager应该有相同的：根据doc向后兼容 API 14。如标题所述，我得到的错误是：

 java.lang.RuntimeException: Unable to get provider androidx.work.impl.WorkManagerInitializer: java.lang.ClassNotFoundException: Didn't find class "androidx.work.impl.WorkManagerInitializer" on path: /data/app/com.example.myapp.apk
    at android.app.ActivityThread.installProvider(ActivityThread.java:4822)

     implementation 'androidx.work:work-runtime:2.2.0'