MTTS | A Demo of Mandarin/Chinese TTS frontend | Machine Learning library

I have an app that plays some text to speech. It works well but I have someone who complains that he can't hear anything on an "Android 10 on a Samsung Galaxy Note 10+ 5G". From the tests I did, it seems that the code is executed without any errors and there is even a pause when the text should be heard, but no sound comes out. Things that were checked:

1. The TTS engine is google - but it doesn't work on both Google and Samsung.
2. In the TTS settings when you hit play, you can hear the playback sample.
3. The language is set to English US

The TTS init code:

I am working on a text to speech application, text to speech is working fine but now I want to highlight each word while it is being spoken by the speech to text engine.

However, I have overridden onRangeStart() method, but actually, it is not executing in my device(API-25) and below.

Text to Speech is working fine in all devices but the text is highlighted (while TTS processing) only in 26+ API devices. Why this is happing and how to make this functionality backwards compatible? here is my code.

Implemented OnInitListener()

I have an ArrayList of an Object "Words" that has two Strings attributes, which are a word in one language and its translation in another language. The words are taken from txt files that have them separated by the symbol "=" and so there is a word and its translation in each line. Like this:

So i have an app connected to firebase. The app retrieves data(a string) from firebase into a text view and then the TextToSpeech feature reads the text out(not from the textView but it itself retrieves the same data from firebase real-time database). I have used onDataChange() meathod so the texttospeech feature reads the text out as soon as any change in the data occurs on firebase, and not on the click of any button. Now i want to place a toggle button in my app and use it to either turn the tts feature on or off but i cant get it to work. When the toggle button is off, i want the texttospeech feature to stop and when the button state is on, i want the texttospeech feature to turn back on.This is what ive tried:

I started working with OData and can not figure out how routing and paths are working.

Have a controller :

A while loop is blocking the UI of my app from showing so I have no chance of pushing the cancel button to break out of it. Also if I am able to get the UI to show by calling the setup function from a TextToSpeech OnInitListener block, I still cant register the button press and exit out.

Why is this happening and how can I get normal, non blocking while loop behavior that I can exit out of with a button click from my cancel button in the UI?

This onCreate does not show the UI at all

I want my application speak a sentence "Hello, If Your Case Is Emergency CALL 911" when the activity starting, but i cannot do that.

i had used the following code:

An Android app running API > 21 utilizes the framework TextToSpeech class. The tts engine is set as com.google.android.tts.

All the available locales in the engine can be obtained with,

I am using text to speech engine in my App. It works fine on emulator Nexus 6 with API 23 and higher. But on emulator Nexus 6 with API 22 it does not speak. Both emulators use Pico TTS as preferred engine.

My activity layout contains only one button "Speak". This is my activity code: