Android仿微信录音功能

提要：需求是开发类似微信发语音的功能，没有语音转文字。网上看了一些代码，不能拿来直接用，部分代码逻辑有问题，所以想把自己的代码贴出来，仅供参考。

功能：

a、设置最大录音时长和录音倒计时（为了方便测试，最大时长设置为15秒，开始倒计时设置为7秒）

b、在录音之前检查录音和存储权限

源码：

1、录音对话框管理类DialogManager：

/**
 * 功能：录音对话框管理类
 */
public class DialogManager {
  private AlertDialog.Builder builder;
  private AlertDialog dialog;
  private ImageView mIcon;
  private ImageView mVoice;
  private TextView mLabel;

  private Context context;

  /**
   * 构造方法
   *
   * @param context Activity级别的Context
   */
  public DialogManager(Context context) {
    this.context = context;
  }

  /**
   * 显示录音的对话框
   */
  public void showRecordingDialog() {
    builder = new AlertDialog.Builder(context, R.style.AudioRecorderDialogStyle);
    LayoutInflater inflater = LayoutInflater.from(context);
    View view = inflater.inflate(R.layout.audio_recorder_dialog, null);
    mIcon = view.findViewById(R.id.iv_dialog_icon);
    mVoice = view.findViewById(R.id.iv_dialog_voice);
    mLabel = view.findViewById(R.id.tv_dialog_label);

    builder.setView(view);
    dialog = builder.create();
    dialog.show();
    dialog.setCanceledOnTouchOutside(false);
  }

  /**
   * 正在播放时的状态
   */
  public void recording() {
    if (dialog != null && dialog.isShowing()) { //显示状态
      mIcon.setVisibility(View.VISIBLE);
      mVoice.setVisibility(View.VISIBLE);
      mLabel.setVisibility(View.VISIBLE);

      mIcon.setImageResource(R.drawable.ic_audio_recorder);
      mVoice.setImageResource(R.drawable.ic_audio_v1);
      mLabel.setText(R.string.audio_record_dialog_up_to_cancel);
    }
  }

  /**
   * 显示想取消的对话框
   */
  public void wantToCancel() {
    if (dialog != null && dialog.isShowing()) { //显示状态
      mIcon.setVisibility(View.VISIBLE);
      mVoice.setVisibility(View.GONE);
      mLabel.setVisibility(View.VISIBLE);

      mIcon.setImageResource(R.drawable.ic_audio_cancel);
      mLabel.setText(R.string.audio_record_dialog_release_to_cancel);
    }
  }

  /**
   * 显示时间过短的对话框
   */
  public void tooShort() {
    if (dialog != null && dialog.isShowing()) { //显示状态
      mIcon.setVisibility(View.VISIBLE);
      mVoice.setVisibility(View.GONE);
      mLabel.setVisibility(View.VISIBLE);

      mLabel.setText(R.string.audio_record_dialog_too_short);
    }
  }

  // 显示取消的对话框
  public void dismissDialog() {
    if (dialog != null && dialog.isShowing()) { //显示状态
      dialog.dismiss();
      dialog = null;
    }
  }

  /**
   * 显示更新音量级别的对话框
   *
   * @param level 1-7
   */
  public void updateVoiceLevel(int level) {
    if (dialog != null && dialog.isShowing()) { //显示状态
      mIcon.setVisibility(View.VISIBLE);
      mVoice.setVisibility(View.VISIBLE);
      mLabel.setVisibility(View.VISIBLE);

      int resId = context.getResources().getIdentifier("ic_audio_v" + level, "drawable", context.getPackageName());
      mVoice.setImageResource(resId);
    }
  }

  public void updateTime(int time) {
    if (dialog != null && dialog.isShowing()) { //显示状态
      mIcon.setVisibility(View.VISIBLE);
      mVoice.setVisibility(View.VISIBLE);
      mLabel.setVisibility(View.VISIBLE);
      mLabel.setText(time + "s");
    }
  }
}

2、录音管理类AudioManager

 /**
 * 功能：录音管理类
 */
public class AudioManager {
  private MediaRecorder mMediaRecorder;
  private String mDir;
  private String mCurrentFilePath;

  private static AudioManager mInstance;

  private boolean isPrepared;

  private AudioManager(String dir) {
    this.mDir = dir;
  }

  //单例模式：在这里实例化AudioManager并传入录音文件地址
  public static AudioManager getInstance(String dir) {
    if (mInstance == null) {
      synchronized (AudioManager.class) {
        if (mInstance == null) {
          mInstance = new AudioManager(dir);
        }
      }
    }
    return mInstance;
  }

  /**
   * 回调准备完毕
   */
  public interface AudioStateListener {
    void wellPrepared();
  }

  public AudioStateListener mListener;

  /**
   * 回调方法
   */
  public void setOnAudioStateListener(AudioStateListener listener) {
    mListener = listener;
  }

  /**
   * 准备
   */
  public void prepareAudio() {
    try {
      isPrepared = false;
      File dir = FileUtils.createNewFile(mDir);
      String fileName = generateFileName();

      File file = new File(dir, fileName);
      mCurrentFilePath = file.getAbsolutePath();
      Logger.t("AudioManager").i("audio file name :" + mCurrentFilePath);

      mMediaRecorder = new MediaRecorder();
      //设置输出文件
      mMediaRecorder.setOutputFile(mCurrentFilePath);
      //设置MediaRecorder的音频源为麦克风
      mMediaRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
      //设置音频格式
      mMediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.MPEG_4);
      //设置音频的格式为AAC
      mMediaRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AAC);
      //准备录音
      mMediaRecorder.prepare();
      //开始
      mMediaRecorder.start();
      //准备结束
      isPrepared = true;
      if (mListener != null) {
        mListener.wellPrepared();
      }
    } catch (Exception e) {
      e.printStackTrace();
    }
  }

  /**
   * 随机生成文件的名称
   */
  private String generateFileName() {
    return UUID.randomUUID().toString() + ".m4a";
  }

  public int getVoiceLevel(int maxLevel) {
    if (isPrepared) {
      try {
        //获得最大的振幅getMaxAmplitude() 1-32767
        return maxLevel * mMediaRecorder.getMaxAmplitude() / 32768 + 1;
      } catch (Exception e) {
      }
    }
    return 1;
  }

  /**
   * 释放资源
   */
  public void release() {
    if (mMediaRecorder != null) {
      mMediaRecorder.stop();
      mMediaRecorder.release();
      mMediaRecorder = null;
    }
  }

  public void cancel() {
    release();
    if (mCurrentFilePath != null) {
      File file = new File(mCurrentFilePath);
      FileUtils.deleteFile(file);
      mCurrentFilePath = null;
    }
  }

  public String getCurrentFilePath() {
    return mCurrentFilePath;
  }
}

3、自定义录音按钮AudioRecorderButton

/**
 * 功能：录音按钮
 */
public class AudioRecorderButton extends AppCompatButton {
  private Context mContext;
  //取消录音Y轴位移
  private static final int DISTANCE_Y_CANCEL = 80;
  //录音最大时长限制
  private static final int AUDIO_RECORDER_MAX_TIME = 15;
  //录音倒计时时间
  private static final int AUDIO_RECORDER_COUNT_DOWN = 7;
  //状态
  private static final int STATE_NORMAL = 1;// 默认的状态
  private static final int STATE_RECORDING = 2;// 正在录音
  private static final int STATE_WANT_TO_CANCEL = 3;// 希望取消
  //当前的状态
  private int mCurrentState = STATE_NORMAL;
  //已经开始录音
  private boolean isRecording = false;
  //是否触发onLongClick
  private boolean mReady;

  private DialogManager mDialogManager;
  private AudioManager mAudioManager;
  private android.media.AudioManager audioManager;

  public AudioRecorderButton(Context context) {
    this(context, null);
  }

  public AudioRecorderButton(Context context, AttributeSet attrs) {
    super(context, attrs);
    this.mContext = context;
    mDialogManager = new DialogManager(context);
    audioManager = (android.media.AudioManager) context.getSystemService(Context.AUDIO_SERVICE);

    String dir = SdUtils.getCustomFolder("Audios");//创建文件夹
    mAudioManager = AudioManager.getInstance(dir);
    mAudioManager.setOnAudioStateListener(new AudioManager.AudioStateListener() {
      @Override
      public void wellPrepared() {
        mHandler.sendEmptyMessage(MSG_AUDIO_PREPARED);
      }
    });
    //按钮长按 准备录音 包括start
    setOnLongClickListener(new OnLongClickListener() {
      @Override
      public boolean onLongClick(View v) {
        //先判断有没有录音和存储权限，有则开始录音，没有就申请权限
        int hasAudioPermission = ContextCompat.checkSelfPermission(mContext, Manifest.permission.RECORD_AUDIO);
        int hasStoragePermission = ContextCompat.checkSelfPermission(mContext, Manifest.permission.WRITE_EXTERNAL_STORAGE);
        if (hasAudioPermission == PackageManager.PERMISSION_GRANTED && hasStoragePermission == PackageManager.PERMISSION_GRANTED) {
          mReady = true;
          mAudioManager.prepareAudio();
        } else {
          RxPermissions permissions = new RxPermissions((FragmentActivity) mContext);
          Disposable disposable = permissions.request(Manifest.permission.RECORD_AUDIO, Manifest.permission.WRITE_EXTERNAL_STORAGE)
              .subscribe(new Consumer<Boolean>() {
                @Override
                public void accept(Boolean granted) {
                  if (!granted) {
                    ToastUtils.showShort("发送语音功能需要赋予录音和存储权限");
                  }
                }
              });
        }
        return true;
      }
    });
  }

  private static final int MSG_AUDIO_PREPARED = 0X110;
  private static final int MSG_VOICE_CHANGED = 0X111;
  private static final int MSG_DIALOG_DISMISS = 0X112;
  private static final int MSG_TIME_OUT = 0x113;
  private static final int UPDATE_TIME = 0x114;

  private boolean mThreadFlag = false;
  //录音时长
  private float mTime;

  //获取音量大小的Runnable
  private Runnable mGetVoiceLevelRunnable = new Runnable() {
    @Override
    public void run() {
      while (isRecording) {
        try {
          Thread.sleep(100);
          mTime += 0.1f;
          mHandler.sendEmptyMessage(MSG_VOICE_CHANGED);
          if (mTime >= AUDIO_RECORDER_MAX_TIME) {//如果时间超过60秒，自动结束录音
            while (!mThreadFlag) {//记录已经结束了录音，不需要再次结束，以免出现问题
              mDialogManager.dismissDialog();
              mAudioManager.release();
              if (audioFinishRecorderListener != null) {
                //先回调，再Reset，不然回调中的时间是0
                audioFinishRecorderListener.onFinish(mTime, mAudioManager.getCurrentFilePath());
                mHandler.sendEmptyMessage(MSG_TIME_OUT);
              }
              mThreadFlag = !mThreadFlag;
            }
            isRecording = false;
          } else if (mTime >= AUDIO_RECORDER_COUNT_DOWN) {
            mHandler.sendEmptyMessage(UPDATE_TIME);
          }
        } catch (InterruptedException e) {
          e.printStackTrace();
        }
      }
    }
  };

  private Handler mHandler = new Handler(new Handler.Callback() {
    @Override
    public boolean handleMessage(Message msg) {
      switch (msg.what) {
        case MSG_AUDIO_PREPARED:
          mDialogManager.showRecordingDialog();
          isRecording = true;
          new Thread(mGetVoiceLevelRunnable).start();
          break;
        case MSG_VOICE_CHANGED:
          mDialogManager.updateVoiceLevel(mAudioManager.getVoiceLevel(7));
          break;
        case MSG_DIALOG_DISMISS:
          mDialogManager.dismissDialog();
          break;
        case MSG_TIME_OUT:
          reset();
          break;
        case UPDATE_TIME:
          int countDown = (int) (AUDIO_RECORDER_MAX_TIME - mTime);
          mDialogManager.updateTime(countDown);
          break;
      }
      return true;
    }
  });

  /**
   * 录音完成后的回调
   */
  public interface AudioFinishRecorderListener {
    /**
     * @param seconds 时长
     * @param filePath 文件
     */
    void onFinish(float seconds, String filePath);
  }

  private AudioFinishRecorderListener audioFinishRecorderListener;

  public void setAudioFinishRecorderListener(AudioFinishRecorderListener listener) {
    audioFinishRecorderListener = listener;
  }

  android.media.AudioManager.OnAudioFocusChangeListener onAudioFocusChangeListener = new android.media.AudioManager.OnAudioFocusChangeListener() {
    @Override
    public void onAudioFocusChange(int focusChange) {
      if (focusChange == android.media.AudioManager.AUDIOFOCUS_LOSS) {
        audioManager.abandonAudioFocus(onAudioFocusChangeListener);
      }
    }
  };

  public void myRequestAudioFocus() {
    audioManager.requestAudioFocus(onAudioFocusChangeListener, android.media.AudioManager.STREAM_MUSIC, android.media.AudioManager.AUDIOFOCUS_GAIN_TRANSIENT);
  }

  @Override
  public boolean onTouchEvent(MotionEvent event) {
    Logger.t("AudioManager").i("x :" + event.getX() + "-Y：" + event.getY());
    switch (event.getAction()) {
      case MotionEvent.ACTION_DOWN:
        mThreadFlag = false;
        isRecording = true;
        changeState(STATE_RECORDING);
        myRequestAudioFocus();
        break;
      case MotionEvent.ACTION_MOVE:
        if (isRecording) {
          //根据想x,y的坐标，判断是否想要取消
          if (event.getY() < 0 && Math.abs(event.getY()) > DISTANCE_Y_CANCEL) {
            changeState(STATE_WANT_TO_CANCEL);
          } else {
            changeState(STATE_RECORDING);
          }
        }
        break;
      case MotionEvent.ACTION_UP:
        //如果longClick 没触发
        if (!mReady) {
          reset();
          return super.onTouchEvent(event);
        }
        //触发了onLongClick 没准备好，但是已经prepared已经start
        //所以消除文件夹
        if (!isRecording || mTime < 1.0f) {
          mDialogManager.tooShort();
          mAudioManager.cancel();
          mHandler.sendEmptyMessageDelayed(MSG_DIALOG_DISMISS, 1000);
        } else if (mCurrentState == STATE_RECORDING) {//正常录制结束
          mDialogManager.dismissDialog();
          mAudioManager.release();
          if (audioFinishRecorderListener != null) {
            audioFinishRecorderListener.onFinish(mTime, mAudioManager.getCurrentFilePath());
          }
        } else if (mCurrentState == STATE_WANT_TO_CANCEL) {
          mDialogManager.dismissDialog();
          mAudioManager.cancel();
        }
        reset();
        audioManager.abandonAudioFocus(onAudioFocusChangeListener);
        break;
    }
    return super.onTouchEvent(event);
  }

  /**
   * 恢复状态 标志位
   */
  private void reset() {
    isRecording = false;
    mTime = 0;
    mReady = false;
    changeState(STATE_NORMAL);
  }

  /**
   * 改变状态
   */
  private void changeState(int state) {
    if (mCurrentState != state) {
      mCurrentState = state;
      switch (state) {
        case STATE_NORMAL:
          setText(R.string.audio_record_button_normal);
          break;
        case STATE_RECORDING:
          if (isRecording) {
            mDialogManager.recording();
          }
          setText(R.string.audio_record_button_recording);
          break;
        case STATE_WANT_TO_CANCEL:
          mDialogManager.wantToCancel();
          setText(R.string.audio_record_button_cancel);
          break;
      }
    }
  }
}

4、DialogStyle

<!--App Base Theme-->
<style name="AppThemeParent" parent="Theme.AppCompat.Light.NoActionBar">
  <!--不显示状态栏：22之前-->
  <item name="android:windowNoTitle">true</item>
  <item name="android:windowAnimationStyle">@style/ActivityAnimTheme</item><!--Activity动画-->
  <item name="actionOverflowMenuStyle">@style/MenuStyle</item><!--toolbar菜单样式-->
</style>

<!--Dialog式的Activity-->
<style name="ActivityDialogStyle" parent="AppThemeParent">
  <item name="android:windowBackground">@android:color/transparent</item>
  <!-- 浮于Activity之上 -->
  <item name="android:windowIsFloating">true</item>
  <!-- 边框 -->
  <item name="android:windowFrame">@null</item>
  <!-- Dialog以外的区域模糊效果 -->
  <item name="android:backgroundDimEnabled">true</item>
  <!-- 半透明 -->
  <item name="android:windowIsTranslucent">true</item>
  <!-- Dialog进入及退出动画 -->
  <item name="android:windowAnimationStyle">@style/ActivityDialogAnimation</item>
</style>

<!--Audio Recorder Dialog-->
<style name="AudioRecorderDialogStyle" parent="ActivityDialogStyle">
  <!-- Dialog以外的区域模糊效果 -->
  <item name="android:backgroundDimEnabled">false</item>
</style>

<!-- Dialog动画：渐入渐出-->
<style name="ActivityDialogAnimation" parent="@android:style/Animation.Dialog">
  <item name="android:windowEnterAnimation">@anim/fade_in</item>
  <item name="android:windowExitAnimation">@anim/fade_out</item>
</style>

5、DialogLayout

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
  android:layout_width="wrap_content"
  android:layout_height="wrap_content"
  android:background="@drawable/audio_recorder_dialog_bg"
  android:gravity="center"
  android:orientation="vertical"
  android:padding="20dp">

  <LinearLayout
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:orientation="horizontal">

    <ImageView
      android:id="@+id/iv_dialog_icon"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:src="@drawable/ic_audio_recorder" />

    <ImageView
      android:id="@+id/iv_dialog_voice"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:src="@drawable/ic_audio_v1" />

  </LinearLayout>

  <TextView
    android:id="@+id/tv_dialog_label"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_marginTop="15dp"
    android:text="@string/audio_record_dialog_up_to_cancel"
    android:textColor="@color/white"
    android:textSize="15dp" />
</LinearLayout>

6、用到的字符串

<!--AudioRecord-->
<string name="audio_record_button_normal">按住 说话</string>
<string name="audio_record_button_recording">松开 结束</string>
<string name="audio_record_button_cancel">松开手指 取消发送</string>
<string name="audio_record_dialog_up_to_cancel">手指上划，取消发送</string>
<string name="audio_record_dialog_release_to_cancel">松开手指，取消发送</string>
<string name="audio_record_dialog_too_short">录音时间过短</string>

7、使用：按钮的样式不需要写在自定义Button中，方便使用

<com.kidney.base_library.view.audioRecorder.AudioRecorderButton
  android:id="@+id/btn_audio_recorder"
  android:layout_width="match_parent"
  android:layout_height="wrap_content"
  android:text="@string/audio_record_button_normal" />

 AudioRecorderButton audioRecorderButton = findViewById(R.id.btn_audio_recorder);
 audioRecorderButton.setAudioFinishRecorderListener(new AudioRecorderButton.AudioFinishRecorderListener() {
   @Override
   public void onFinish(float seconds, String filePath) {
     Logger.i(seconds + "秒：" + filePath);
   }
 });

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