从 HiltViewModel @Injection 访问 Application()

Question

我正在尝试通过以下代码在 Android 中访问“语音到文本”音频：

@HiltViewModel
class SettingsViewModel @Inject constructor(
    private val settingsRepository: SettingsRepository
) : ViewModel(), RecognitionListener
{
    data class SpeechState(
        val spokenText: String = "",
        val error: String = ""
    )

    private val _settings = MutableStateFlow(value = Settings())
    val settings: StateFlow<HomeSettings> = _settings.asStateFlow()
    private val speechState = MutableStateFlow(value = SpeechState())

    private val speechRecognizer: SpeechRecognizer = createSpeechRecognizer(application.applicationContext).apply {
        setRecognitionListener(this@SettingsViewModel)
    }


    private fun updateResults(speechBundle: Bundle?) {
        val userSaid = speechBundle?.getStringArrayList(RESULTS_RECOGNITION)
        speechState.value = speechState.value.copy(spokenText = userSaid?.get(0) ?: "")
        reactToSpeech(speechState.value.spokenText)
    }

    override fun onEndOfSpeech() = speechRecognizer.stopListening()
    override fun onResults(results: Bundle?) = updateResults(speechBundle = results)
    override fun onPartialResults(results: Bundle?) = updateResults(speechBundle = results)


    override fun onError(errorCode: Int) {}

    private val recognizerIntent: Intent = Intent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH).apply {
        putExtra(RecognizerIntent.EXTRA_LANGUAGE_MODEL, RecognizerIntent.LANGUAGE_MODEL_FREE_FORM)
        putExtra(RecognizerIntent.EXTRA_CALLING_PACKAGE, application.packageName)
        putExtra(
            RecognizerIntent.EXTRA_LANGUAGE_MODEL,
            RecognizerIntent.LANGUAGE_MODEL_WEB_SEARCH
        )
        putExtra(RecognizerIntent.EXTRA_PROMPT, "Talk")
        //putExtra(RecognizerIntent.EXTRA_PARTIAL_RESULTS, true)
    }

    init {}

    fun startListening(){
        speechRecognizer.startListening(recognizerIntent)
    }

    private fun reactToSpeech(speech: String){
        when(speech){
            "run" -> Log.w("App", "Running!")
            "stop" -> Log.w("App", "Stopped!")
            else -> {}
        }
    }

    override fun onReadyForSpeech(p0: Bundle?) {}
    override fun onBeginningOfSpeech() {}
    override fun onRmsChanged(p0: Float) {}
    override fun onBufferReceived(p0: ByteArray?) {}
    override fun onEvent(p0: Int, p1: Bundle?) {}
}

我不知道如何访问 Application() 部分或上下文以便能够通过 Google 访问语音服务 API。如果有人确实知道如何做到这一点，请告诉我。我今天花了几个小时谷歌搜索。

Answer 1

您可以扩展

AndroidViewModel

而不是

ViewModel

https://developer.android.com/reference/androidx/lifecycle/AndroidViewModel

AndroidViewModel

可以访问

Application

上下文。

或者您可以选择简单地将应用程序上下文注入您的视图模型而不扩展

AndroidViewModel

，如下所示：
https://stackoverflow.com/a/63122193/2877453