Android录音功能（仿微信）
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() {
@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
5、DialogLayout
6、用到的字符串
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录音时间过短 7、使用：按钮的样式不需要写在自定义Button中，方便使用