Android 数据存储区 IOException 无法重命名为

Question

我正在尝试在我的项目中实现 Jetpack Datastore。我正在使用 apha-01版本并且代码运行良好。然后我在 Gradle 文件中看到有一个新版本，所以我将其更新为 alpha-03 .
启动我的应用程序后，我遇到了另一个问题。我发现在alpha-03中没有找到Proto库版本所以我回滚到版本 alpha-01 .另外，我试过 alpha-02 .从那以后，我遇到了以下错误:

 Process: com.montymobile.sands, PID: 19928
    java.io.IOException: /data/user/0/com.montymobile.sands/files/datastore/sns_preferences.preferences_pb.tmp could not be renamed to /data/user/0/com.montymobile.sands/files/datastore/sns_preferences.preferences_pb
        at androidx.datastore.SingleProcessDataStore.writeData$datastore_core_release(SingleProcessDataStore.kt:304)
        at androidx.datastore.SingleProcessDataStore.transformAndWrite(SingleProcessDataStore.kt:282)
        at androidx.datastore.SingleProcessDataStore$actor$1.invokeSuspend(SingleProcessDataStore.kt:165)
        at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:33)
        at kotlinx.coroutines.DispatchedTask.run(DispatchedTask.kt:56)
        at kotlinx.coroutines.scheduling.CoroutineScheduler.runSafely(CoroutineScheduler.kt:571)
        at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.executeTask(CoroutineScheduler.kt:738)
        at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.runWorker(CoroutineScheduler.kt:678)
        at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.run(CoroutineScheduler.kt:665)

我注意到发生这种情况是因为我一个接一个地保存了两个不同的 key ，每个都在一个协程中。当我评论第二个 Action 时，它起作用了。
谁能解释为什么会发生这种情况？以及如何保存尽可能多的值？
任何帮助，将不胜感激。

Answer 1

Screenshot of the sime UI 检查以下代码。

class DataStoreClass(private val context: Context) {

    private fun dataStore(): DataStore<Preferences> = context.createDataStore("settings")

    suspend  fun <T> save(key: Preferences.Key<T>, value: T) {
        dataStore().edit {
            it[key] = value
        }
    }

    suspend fun <T> read(key: Preferences.Key<T>, defaultValue: T): T {
        val pre = dataStore().data.first()
        return pre[key] ?: defaultValue
    }

}

open class BaseActivity : AppCompatActivity() {

    inline fun <reified T> getSavedValue(key: String, defaultValue:T): Any {
         var savedValue = Any()
         runBlocking {
             val operation = async {
                 val savedStr = DataStoreClass(this@BaseActivity).read(preferencesKey(key),
                     defaultValue!!).let {
                     it
                 }
                 savedValue = savedStr
             }
             operation.await()
         }
         return savedValue
     }

    fun <T> saveDesiredValue(key: Preferences.Key<T>, value: T) {
        runBlocking {
            CoroutineScope(Dispatchers.IO).launch {
                DataStoreClass(this@BaseActivity).save(key, value)
            }.join()
        }
    }
}

class MainActivity : BaseActivity() {

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

        val bnt = findViewById<Button>(R.id.btnSave)
        val btnRead = findViewById<Button>(R.id.btnRead)
        val key = findViewById<EditText>(R.id.key)
        val etValue = findViewById<EditText>(R.id.etValue)
        val value = findViewById<TextView>(R.id.value)

        bnt.setOnClickListener {
            saveDesiredValue(preferencesKey(key.text.toString()),etValue.text.toString())
            saveDesiredValue(preferencesKey("test"), Random.nextInt(100))

        }

        btnRead.setOnClickListener {
            value.text = "${getSavedValue(key.text.toString(),"")} " +
                    "${getSavedValue("test",0)}"
        }
    }
}