【Android App】实现在线语音合成功能（使用云知声平台和WebSocket 超详细 附源码）

package com.example.voice;
import android.media.AudioManager;
import android.media.MediaPlayer;
import android.os.Bundle;
import androidx.appcompat.app.AppCompatActivity;
import android.os.Environment;
import android.text.TextUtils;
import android.util.Log;
import android.view.View;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;
import com.example.voice.constant.SoundConstant;
import com.example.voice.task.TtsClientEndpoint;
import com.example.voice.util.DateUtil;
import com.example.voice.util.SoundUtil;
public class VoiceComposeActivity extends AppCompatActivity {
    private final static String TAG = "VoiceComposeActivity";
    private TextView tv_option; // 声明一个文本视图对象
    private EditText et_compose_text; // 声明一个编辑框对象
    private TextView tv_result; // 声明一个文本视图对象
    private String mComposeFilePath; // 合成语音的文件路径
    private MediaPlayer mMediaPlayer = new MediaPlayer(); // 媒体播放器
    private boolean isPlaying = false; // 是否正在播音
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_voice_compose);
        findViewById(R.id.iv_back).setOnClickListener(v -> finish());
        TextView tv_title = findViewById(R.id.tv_title);
        tv_title.setText("在线语音合成");
        tv_option = findViewById(R.id.tv_option);
        tv_option.setText("开始播放语音");
        tv_option.setVisibility(View.GONE);
        et_compose_text = findViewById(R.id.et_compose_text);
        tv_result = findViewById(R.id.tv_result);
        findViewById(R.id.btn_compose_voice).setOnClickListener(v -> {
            String text = et_compose_text.getText().toString();
            if (TextUtils.isEmpty(text)) {
                Toast.makeText(this, "请先输入待朗读的一段话", Toast.LENGTH_SHORT).show();
                return;
            }
            new Thread(() -> onlineCompose(text)).start(); // 启动在线合成语音的线程
        });
        tv_option.setOnClickListener(v -> {
            if (!isPlaying) { // 未在播音
                startPlay(); // 开始播音
            } else { // 正在播音
                stopPlay(); // 停止播音
            }
        });
    }
    // 在线合成语音
    private void onlineCompose(String text) {
        mComposeFilePath = String.format("%s/%s.mp3",
                getExternalFilesDir(Environment.DIRECTORY_DOWNLOADS).toString(),
                DateUtil.getNowDateTime());
        // 创建语音合成任务，并指定语音监听器
        TtsClientEndpoint task = new TtsClientEndpoint(this, mComposeFilePath, text, arg -> {
            if (Boolean.TRUE.equals(arg[0])) {
                Toast.makeText(this, "语音合成结束", Toast.LENGTH_SHORT).show();
                tv_result.setText("音频文件位于"+arg[2]);
                tv_option.setVisibility(View.VISIBLE);
            }
        });
        SoundUtil.startSoundTask(SoundConstant.URL_TTS, task); // 启动语音合成任务
    }
    // 开始播音
    private void startPlay() {
        isPlaying = !isPlaying;
        tv_option.setText("停止播放语音");
        mMediaPlayer.reset(); // 重置媒体播放器
        // 设置媒体播放器的完成监听器
        mMediaPlayer.setOnCompletionListener(mp -> stopPlay());
        mMediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC); // 设置音频流的类型为音乐
        try {
            mMediaPlayer.setDataSource(mComposeFilePath); // 设置媒体数据的文件路径
            mMediaPlayer.prepare(); // 媒体播放器准备就绪
            mMediaPlayer.start(); // 媒体播放器开始播放
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
    // 停止播音
    private void stopPlay() {
        tv_option.setText("开始播放语音");
        if (mMediaPlayer.isPlaying() || isPlaying) { // 如果正在播放
            isPlaying = !isPlaying;
            mMediaPlayer.stop(); // 停止播放
            Toast.makeText(this, "语音播放结束", Toast.LENGTH_LONG).show();
        }
    }
    @Override
    protected void onStop() {
        super.onStop();
        stopPlay(); // 停止播音
    }
    @Override
    protected void onDestroy() {
        super.onDestroy();
        mMediaPlayer.release(); // 释放媒体播放器
    }
}

package com.example.voice.util;
import android.util.Log;
import com.example.voice.constant.SoundConstant;
import java.net.URI;
import java.security.MessageDigest;
import javax.websocket.ContainerProvider;
import javax.websocket.Session;
import javax.websocket.WebSocketContainer;
public class SoundUtil {
    private final static String TAG = "SoundUtil";
    // 启动语音处理任务（语音识别或者语音合成）
    public static void startSoundTask(String url, Object task) {
        long time = System.currentTimeMillis();
        StringBuilder paramBuilder = new StringBuilder();
        // 填写该应用在开放平台上申请的密钥和密码
        paramBuilder.append(SoundConstant.APP_KEY).append(time).
                append(SoundConstant.APP_SECRET);
        String sign = getSHA256Digest(paramBuilder.toString());
        StringBuilder param = new StringBuilder();
        param.append("appkey=azkk2kwv5f22m5z4iebchxsetodz3y677chtzniz").append(SoundConstant.APP_KEY).append("&")
                .append("time=").append(time).append("&")
                .append("sign=").append(sign).append("&").append("appsecret=6d6f4426e005e6b7f9a7fee2a9fdda44");
        String fullUrl = url + param.toString();
        Log.d(TAG, "fullUrl="+fullUrl);
        // 获取WebSocket容器
        WebSocketContainer container = ContainerProvider.getWebSocketContainer();
        try {
            URI uri = new URI(fullUrl); // 创建一个URI对象
            // 连接WebSocket服务器，并关联语音处理任务获得连接会话
            Session session = container.connectToServer(task, uri);
            // 设置文本消息的最大缓存大小
            session.setMaxTextMessageBufferSize(1024 * 1024 * 10);
            // 设置二进制消息的最大缓存大小
            session.setMaxBinaryMessageBufferSize(1024 * 1024 * 10);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
    // 获得SHA摘要
    private static String getSHA256Digest(String data) {
        String digest = null;
        try {
            MessageDigest md = MessageDigest.getInstance("SHA-256");
            byte[] bytes = md.digest(data.getBytes("UTF-8"));
            digest = byte2hex(bytes);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return digest;
    }
    // 二进制转十六进制字符串
    private static String byte2hex(byte[] bytes) {
        StringBuilder sign = new StringBuilder();
        for (int i = 0; i < bytes.length; i++) {
            String hex = Integer.toHexString(bytes[i] & 0xFF);
            if (hex.length() == 1) {
                sign.append("0");
            }
            sign.append(hex.toUpperCase());
        }
        return sign.toString();
    }
}