android - Instant Apps 上的文本转语音崩溃

Question

我正在实现一个即时应用程序，该应用程序利用 Android 设备上提供的文本转语音功能。按照 Android 开发博客文章 An introduction to Text-To-Speech in Android 中详述的说明，我已经成功地为非即时应用程序初始化并正常工作的 TextToSpeech 实例

我已将我的应用重构为免安装应用，并确认文本转语音功能在非免安装应用中正常运行。但是，当在免安装应用中运行以下 ACTION_CHECK_TTS_DATA Intent 时:

val checkIntent = Intent()
checkIntent.action = TextToSpeech.Engine.ACTION_CHECK_TTS_DATA
activity.startActivityForResult(checkIntent, initilizeTtsRequestCode)

我收到以下错误:

FATAL EXCEPTION: main
 Process: [PACKAGE_NAME_REDACTED], PID: 9500
 java.lang.RuntimeException: Unable to start activity ComponentInfo{[PACKAGE_NAME_REDACTED]/[PACKAGE_NAME_REDACTED].ui.SNTMainActivity}: android.content.ActivityNotFoundException: No Activity found to handle Intent { act=android.speech.tts.engine.CHECK_TTS_DATA }
     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2817)
     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2892)
     at android.app.ActivityThread.-wrap11(Unknown Source:0)
     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1593)
     at android.os.Handler.dispatchMessage(Handler.java:105)
     at android.os.Looper.loop(Looper.java:164)
     at android.app.ActivityThread.main(ActivityThread.java:6541)
     at java.lang.reflect.Method.invoke(Native Method)
     at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:240)
     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:767)
  Caused by: android.content.ActivityNotFoundException: No Activity found to handle Intent { act=android.speech.tts.engine.CHECK_TTS_DATA }
     at android.app.Instrumentation.checkStartActivityResult(Instrumentation.java:1936)
     at android.app.Instrumentation.execStartActivity(Instrumentation.java:1615)
     at android.app.Activity.startActivityForResult(Activity.java:4472)
     at android.support.v4.app.BaseFragmentActivityApi16.startActivityForResult(BaseFragmentActivityApi16.java:54)
     at android.support.v4.app.FragmentActivity.startActivityForResult(FragmentActivity.java:65)
     at android.app.Activity.startActivityForResult(Activity.java:4430)
     at android.support.v4.app.FragmentActivity.startActivityForResult(FragmentActivity.java:711)
     at [PACKAGE_NAME_REDACTED].SNTTtsManager.initialize(SNTTtsManager.kt:92)
     at [PACKAGE_NAME_REDACTED].ui.SNTMainActivity.onStart(SNTMainActivity.kt:96)
     at android.app.Instrumentation.callActivityOnStart(Instrumentation.java:1333)
     at android.app.Activity.performStart(Activity.java:6992)
     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2780)
     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2892) 
     at android.app.ActivityThread.-wrap11(Unknown Source:0) 
     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1593) 
     at android.os.Handler.dispatchMessage(Handler.java:105) 
     at android.os.Looper.loop(Looper.java:164) 
     at android.app.ActivityThread.main(ActivityThread.java:6541) 
     at java.lang.reflect.Method.invoke(Native Method) 
     at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:240) 
     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:767) 

我在 Restricted features page 上找不到任何关于文本到语音或类似系统服务不适用于即时应用程序的信息。也不FAQ .这是一个错误还是此功能不适用于 Instant Apps？

Answer 1

Android Instant Apps 相对较新，Restricted Features 中有一节告诉您不支持的功能:

• 不支持的功能
• 长时间运行的后台服务
• list 注册的广播接收器
• 外部可访问的内容提供商
• 重新参与通知
• 内容提供者

我相信 TextToSpeech 要么是一个外部可访问的内容提供者，要么是一个长期运行的后台服务。