Android implements text-to-speech through TextToSpeech

1. Directly upload the code:

import android.app.Activity;
import android.os.Bundle;
import android.speech.tts.TextToSpeech;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;

import java.util.Locale;

public class MainActivity extends Activity implements TextToSpeech.OnInitListener {
    TextToSpeech textToSpeech;
    EditText ed1;
    Button b1;
    String toSpeak;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        ed1 = findViewById(R.id.editText);
        b1 = findViewById(R.id.button);

        textToSpeech = new TextToSpeech(getApplicationContext(), this);
        b1.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                toSpeak = ed1.getText().toString();
                Toast.makeText(getApplicationContext(), toSpeak, Toast.LENGTH_SHORT).show();
//                textToSpeech.speak(toSpeak, TextToSpeech.QUEUE_FLUSH, null);
                textToSpeech.speak(toSpeak, TextToSpeech.QUEUE_ADD, null, null);
            }
        });
    }


    public void onPause() {
        if (textToSpeech != null) {
            textToSpeech.stop();
            textToSpeech.shutdown();
        }
        super.onPause();
    }

    @Override
    public void onInit(int status) {
        //判断是否转化成功
        if (status == TextToSpeech.SUCCESS) {
            //设置语言为中文
            int languageCode = textToSpeech.setLanguage(Locale.CHINA);
            //判断是否支持这种语言，Android原生不支持中文，使用科大讯飞的tts引擎就可以了
            if (languageCode == TextToSpeech.LANG_NOT_SUPPORTED) {
                Log.d("TAG", "onInit: 不支持这种语言");
            } else {
                //不支持就改成英文
                textToSpeech.setLanguage(Locale.US);
            }
            //设置音调,值越大声音越尖（女生），值越小则变成男声,1.0是常规
            textToSpeech.setPitch(1.0f);
            //设置语速
            textToSpeech.setSpeechRate(1.0f);
            //在onInIt方法里直接调用tts的播报功能
//            textToSpeech.speak("李佩伦打卡成功", TextToSpeech.QUEUE_ADD, null);
        }
    }
}

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">

    <TextView
        android:id="@+id/textview"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentTop="true"
        android:layout_centerHorizontal="true"
        android:text="文字转语音示例"
        android:textSize="35sp" />


    <EditText
        android:id="@+id/editText"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@+id/textview"
        android:layout_alignParentStart="true"
        android:layout_alignParentLeft="true"
        android:layout_alignParentEnd="true"
        android:layout_alignParentRight="true"
        android:layout_marginTop="46dp"
        android:hint="输入文字"
        android:textColor="#ff7aff10"
        android:textColorHint="#ffff23d1" />

    <Button
        android:id="@+id/button"
        android:layout_width="130dp"
        android:layout_height="wrap_content"
        android:layout_below="@+id/editText"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="46dp"
        android:text="文字转语音" />

</RelativeLayout>

2. Effect: Input 'Chinese' and click the button to pronounce

 3. Compatible with higher versions of Android

        If there is no sound when switching to voice in Android 11, and an error is reported: speak failed: not bound to TTS engine , you need to declare the following content in the AndroidManifest.xml file:

    <queries>
        <intent>
            <action android:name="android.intent.action.TTS_SERVICE"/>
        </intent>
    </queries>

4. Expansion

1. Some locales supported by setLanguage:

language	constant
American English	US
Canadian French	CANADA_FRENCH
German	GERMANY
italian	ITALY
Japanese	JAPAN
Chinese	CHINA

 2. Some other methods in the TextToSpeech class:

method	illustrate
addSpeech(String text, String filename)	This method adds a mapping between text strings and sound files.
getLanguage()	This method returns a Locale instance describing the language.
isSpeaking()	This method checks to see if the TextToSpeech engine is busy speaking.
setPitch(float pitch)	This method sets the speech pitch of the TextToSpeech engine.
setSpeechRate(float speechRate)	This method sets the speech rate.
shutdown()	This method releases resources used by the TextToSpeech engine.
stop()	This method stops talking.

3. The sound played can be set in the mobile phone: Settings -> Language and Input Method -> Text-to-Speech (TTS) output, or install other platform speech recognition modules and configure them here.

Application Name	support offline	Remark	download link
ITRI TTS	yes	none	download
Xunfei Yuji	yes	You need to open it once, but you don't need to log in	download
HKUST Xunfei Speech Engine 3.0	yes	recommend	download
Speech Services by Google	no	You need to surf the Internet scientifically, and you need to download the voice pack first when offline	download