Android使用MediaRecorder类实现视频和音频录制功能

<LinearLayout
  android:layout_width="match_parent"
  android:layout_height="match_parent"
  android:orientation="vertical">
  <LinearLayout
   android:layout_width="match_parent"
   android:layout_height="wrap_content"
   android:orientation="horizontal">
   <Button
    android:id="@+id/record_btn"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_marginLeft="15dp"
    android:layout_weight="1"
    android:text="record" />
   <Button
    android:id="@+id/play_btn"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_marginRight="15dp"
    android:layout_weight="1"
    android:text="play" />
  </LinearLayout>
  <SurfaceView
   android:id="@+id/surface_view"
   android:layout_width="match_parent"
   android:layout_height="match_parent"
   android:layout_marginBottom="20dp" />
 </LinearLayout>

 /*
 * 相机预览前的准备工作代码 单独抽出来
 * */
 private boolean prepareVideoRecorder() throws IOException {
  if (mMediaRecorder == null) {
   mMediaRecorder = new MediaRecorder();
   mMediaRecorder.reset();
  }
   /*camera相关设置部分*/
  mCamera = Camera.open(0);//Camera.CameraInfo.CAMERA_FACING_BACK
  if (mCamera != null) {
   //设置旋转角度，顺时针方向，因为默认是逆向90度的，这样图像就是正常显示了
   mCamera.setDisplayOrientation(90);
   mCamera.unlock();
   mMediaRecorder.setCamera(mCamera);
  }
   /*recorder设置部分*/
  mMediaRecorder.setAudioSource(MediaRecorder.AudioSource.CAMCORDER);
  mMediaRecorder.setVideoSource(MediaRecorder.VideoSource.CAMERA);
  mMediaRecorder.setProfile(CamcorderProfile.get(CamcorderProfile.QUALITY_HIGH));
  mMediaRecorder.setOutputFile(getOutputMediaFile());
  mMediaRecorder.setPreviewDisplay(mSurfaceView.getHolder().getSurface());
  mMediaRecorder.prepare();
  return true;
 }

 /*
 * 获取手机外部存储路径
 * */
 private String getOutputFile() {
  File mediaFile = null;
  boolean OutputExist = Environment.getExternalStorageState().equals(android.os.Environment.MEDIA_MOUNTED);
  if (OutputExist) {
   mediaFile = Environment.getExternalStorageDirectory();
   return mediaFile.toString();
  }
  return null;
 }
 /*
 * 获取录制视频的日期 作为存储文件路径一部分
 * */
 private String getDate() {
  Log.d(TAG, "获取录制视频的日期 ");
  Calendar ca = Calendar.getInstance();
  int year = ca.get(Calendar.YEAR);   // 获取年份
  int month = ca.get(Calendar.MONTH);   // 获取月份
  int day = ca.get(Calendar.DATE);   // 获取日
  String date = "" + year + "_" + (month + 1) + "_" + day;
  return date;
 }
 /*
 *创建视频存储文件夹 录制好的视频存储在手机外部存储中 以录像时间+mp4格式命名
 * */
 private String getOutputMediaFile() {
  Log.d(TAG, "获取视频存储的位置 ");
  String mediaPath = getOutputFile();
  if (mediaPath != null) {
   File mediaFile = new File(mediaPath + "/recordVideo");
   if (!mediaFile.exists()) {
    mediaFile.mkdir();
   }
   return mMediaPath = mediaFile.getAbsolutePath() + File.separator + getDate() + ".mp4";
  }
  return null;
 }

 /*
 * 录制视频结束时释放相机资源
 * */
 private void releaseMediaRecorder() {
  Log.d(TAG, "录制结束后释放资源 ");
  if (mMediaRecorder != null) {
   mMediaRecorder.reset(); // clear recorder configuration
   mMediaRecorder.release(); // release the recorder object
   mMediaRecorder = null;
   mCamera.lock();   // lock camera for later use
  }
 }

 private void initBtnClick() {
  StartRecording();
  mPlayBtn.setOnClickListener(new View.OnClickListener() {
   @Override
   public void onClick(View view) {
    if (mMediaPlayer == null) {
     mMediaPlayer = new MediaPlayer();
     mMediaPlayer.reset();
     Uri uri = Uri.parse(mMediaPath);
     mMediaPlayer = MediaPlayer.create(MainActivity.this,uri);
     mMediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
     mMediaPlayer.setDisplay(mSurfaceHolder);
     try{
      mMediaPlayer.prepare();
     }catch (Exception e){
      e.printStackTrace();
     }
     mMediaPlayer.start();
    }
   }
  });
 }
 private void StartRecording(){
  mRecordBtn.setOnClickListener(new View.OnClickListener() {
   @Override
   public void onClick(View view) {
    if (!mIsRecord) {
     try {
      Log.d(TAG, "首次点击开始录像 ");
      if (prepareVideoRecorder()) {
       mMediaRecorder.start();
       mIsRecord = true;
       mRecordBtn.setText("stop");
      }
     } catch (IOException e) {
      e.printStackTrace();
     }
    } else {
     Log.d(TAG, "再次点击停止录像");
     mMediaRecorder.stop();
     releaseMediaRecorder();
     mCamera.lock();
     mRecordBtn.setText("record");
     mIsRecord = false;
     if (mCamera != null) {
      mCamera.release();
      mCamera = null;
     }
    }
   }
  });
 }

 mPlayBtn.setOnClickListener(new View.OnClickListener() {
   @Override
   public void onClick(View view) {
    if (mMediaPlayer == null) {
     mMediaPlayer = new MediaPlayer();
     mMediaPlayer.reset();
     Uri uri = Uri.parse(mMediaPath);
     mMediaPlayer = MediaPlayer.create(MainActivity.this,uri);
     mMediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
     mMediaPlayer.setDisplay(mSurfaceHolder);
     try{
      mMediaPlayer.prepare();
     }catch (Exception e){
      e.printStackTrace();
     }
     mMediaPlayer.start();
    }
   }
  });

 private void requestCameraAndStoragePermission() {
  //检查用户是否授权
  for (int i = 0; i < permissions.length; i++) {
   if (ContextCompat.checkSelfPermission(MainActivity.this, permissions[i]) != PackageManager.PERMISSION_GRANTED) {
    //没有授权则请求相应权限
    ActivityCompat.requestPermissions(MainActivity.this, new String[]{permissions[i]}, 1);
   }
  }
  //利用权限申请工具类来实现
  mPermissionsUtils = PermissionsUtils.getInstance();
  mPermissionsUtils.chekPermissions(MainActivity.this,permissions, permissionsResult);
 }
 //创建监听权限的接口对象
 PermissionsUtils.IPermissionsResult permissionsResult = new PermissionsUtils.IPermissionsResult() {
  @Override
  public void passPermissons() {
  //StartRecording(); 注意这里的逻辑 并不是权限通过了就立即开始录像了 而是权限通过了 就可以打开Camera进行预览
   mCamera = Camera.open(0);//Camera.CameraInfo.CAMERA_FACING_BACK
  }
  @Override
  public void forbitPermissons() {
   Toast.makeText(MainActivity.this, "You denyied the permission", Toast.LENGTH_SHORT).show();
  }
 };

public class MainActivity extends AppCompatActivity implements SurfaceHolder.Callback{
 private static final String TAG = "MainActivity";
 private SurfaceView mSurfaceView;
 private Button mRecordBtn, mPlayBtn;
 private boolean mIsRecord = false; //是否正在录像
 private Camera mCamera;
 private MediaRecorder mMediaRecorder;
 private String mMediaPath;
 private MediaPlayer mMediaPlayer;
 private SurfaceHolder mSurfaceHolder;
 private PermissionsUtils mPermissionsUtils;
 private String[] permissions = {Manifest.permission.WRITE_EXTERNAL_STORAGE,
         Manifest.permission.CAMERA,
         Manifest.permission.RECORD_AUDIO};
 @Override
 protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_main);
  //6.0及以上系统请求运行时权限 利用权限申请工具类（见下文）
  requestCameraAndStoragePermission();
  mSurfaceView = (SurfaceView) findViewById(R.id.surface_view);
  mSurfaceView.getHolder().setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS); // 必须-设置Surface不需要维护自己的缓冲区
  mRecordBtn = (Button) findViewById(R.id.record_btn);
  mPlayBtn = (Button) findViewById(R.id.play_btn);
  initBtnClick();
  SurfaceHolder holder = mSurfaceView.getHolder();
  holder.addCallback(this);
 }
 private void requestCameraAndStoragePermission() {
  //检查用户是否授权
  for (int i = 0; i < permissions.length; i++) {
   if (ContextCompat.checkSelfPermission(MainActivity.this, permissions[i]) != PackageManager.PERMISSION_GRANTED) {
    //没有授权则请求相应权限
    ActivityCompat.requestPermissions(MainActivity.this, new String[]{permissions[i]}, 1);
   }
  }
  //利用权限申请工具类来实现
  mPermissionsUtils = PermissionsUtils.getInstance();
  mPermissionsUtils.chekPermissions(MainActivity.this,permissions, permissionsResult);
 }
 //创建监听权限的接口对象
 PermissionsUtils.IPermissionsResult permissionsResult = new PermissionsUtils.IPermissionsResult() {
  @Override
  public void passPermissons() {
//   StartRecording(); 注意这里的逻辑 并不是权限通过了就立即开始录像了 而是权限通过了 就可以打开Camera进行预览
   mCamera = Camera.open(0);//Camera.CameraInfo.CAMERA_FACING_BACK
  }
  @Override
  public void forbitPermissons() {
   Toast.makeText(MainActivity.this, "You denyied the permission", Toast.LENGTH_SHORT).show();
  }
 };
 private void StartRecording(){
  mRecordBtn.setOnClickListener(new View.OnClickListener() {
   @Override
   public void onClick(View view) {
    if (!mIsRecord) {
     try {
      Log.d(TAG, "首次点击开始录像 ");
      if (prepareVideoRecorder()) {
       mMediaRecorder.start();
       mIsRecord = true;
       mRecordBtn.setText("stop");
      }
     } catch (IOException e) {
      e.printStackTrace();
     }
    } else {
     Log.d(TAG, "再次点击停止录像");
     mMediaRecorder.stop();
     releaseMediaRecorder();
     mCamera.lock();
     mRecordBtn.setText("record");
     mIsRecord = false;
     if (mCamera != null) {
      mCamera.release();
      mCamera = null;
     }
    }
   }
  });
 }
 private void initBtnClick() {
  StartRecording();
  mPlayBtn.setOnClickListener(new View.OnClickListener() {
   @Override
   public void onClick(View view) {
    if (mMediaPlayer == null) {
     mMediaPlayer = new MediaPlayer();
     mMediaPlayer.reset();
     Uri uri = Uri.parse(mMediaPath);
     mMediaPlayer = MediaPlayer.create(MainActivity.this,uri);
     mMediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
     mMediaPlayer.setDisplay(mSurfaceHolder);
     try{
      mMediaPlayer.prepare();
     }catch (Exception e){
      e.printStackTrace();
     }
     mMediaPlayer.start();
    }
   }
  });
 }
 /*
 * 相机预览前的准备工作代码 单独抽出来
 * */
 private boolean prepareVideoRecorder() throws IOException {
  if (mMediaRecorder == null) {
   mMediaRecorder = new MediaRecorder();
   mMediaRecorder.reset();
  }
   /*camera相关设置部分*/
  mCamera = Camera.open(0);//Camera.CameraInfo.CAMERA_FACING_BACK
  if (mCamera != null) {
   //设置旋转角度，顺时针方向，因为默认是逆向90度的，这样图像就是正常显示了
   mCamera.setDisplayOrientation(90);
   mCamera.unlock();
   mMediaRecorder.setCamera(mCamera);
  }
   /*recorder设置部分*/
  mMediaRecorder.setAudioSource(MediaRecorder.AudioSource.CAMCORDER);
  mMediaRecorder.setVideoSource(MediaRecorder.VideoSource.CAMERA);
  mMediaRecorder.setProfile(CamcorderProfile.get(CamcorderProfile.QUALITY_HIGH));
  mMediaRecorder.setOutputFile(getOutputMediaFile());
  mMediaRecorder.setPreviewDisplay(mSurfaceView.getHolder().getSurface());
  mMediaRecorder.prepare();
  return true;
 }
 /*
 * 获取手机外部存储路径
 * */
 private String getOutputFile() {
  File mediaFile = null;
  boolean OutputExist = Environment.getExternalStorageState().equals(android.os.Environment.MEDIA_MOUNTED);
  if (OutputExist) {
   mediaFile = Environment.getExternalStorageDirectory();
   return mediaFile.toString();
  }
  return null;
 }
 /*
 * 获取录制视频的日期 作为存储文件路径一部分
 * */
 private String getDate() {
  Log.d(TAG, "获取录制视频的日期 ");
  Calendar ca = Calendar.getInstance();
  int year = ca.get(Calendar.YEAR);   // 获取年份
  int month = ca.get(Calendar.MONTH);   // 获取月份
  int day = ca.get(Calendar.DATE);   // 获取日
  String date = "" + year + "_" + (month + 1) + "_" + day;
  return date;
 }
 /*
 *创建视频存储文件夹 录制好的视频存储在手机外部存储中 以录像时间+mp4格式命名
 * */
 private String getOutputMediaFile() {
  Log.d(TAG, "获取视频存储的位置 ");
  String mediaPath = getOutputFile();
  if (mediaPath != null) {
   File mediaFile = new File(mediaPath + "/recordVideo");
   if (!mediaFile.exists()) {
    mediaFile.mkdir();
   }
   return mMediaPath = mediaFile.getAbsolutePath() + File.separator + getDate() + ".mp4";
  }
  return null;
 }
 /*
 * 录制视频结束时释放相机资源
 * */
 private void releaseMediaRecorder() {
  Log.d(TAG, "录制结束后释放资源 ");
  if (mMediaRecorder != null) {
   mMediaRecorder.reset(); // clear recorder configuration
   mMediaRecorder.release(); // release the recorder object
   mMediaRecorder = null;
   mCamera.lock();   // lock camera for later use
  }
 }
 @Override
 public void surfaceCreated(SurfaceHolder surfaceHolder) {
  mSurfaceHolder = surfaceHolder;
 }
 @Override
 public void surfaceChanged(SurfaceHolder surfaceHolder, int i, int i1, int i2) {
  mSurfaceHolder = surfaceHolder;
 }
 @Override
 public void surfaceDestroyed(SurfaceHolder surfaceHolder) {
  mSurfaceView = null;
  mSurfaceHolder = null;
  releaseMediaRecorder();
  if (mCamera != null) {
   mCamera.release();
   mCamera = null;
  }
  if (mMediaPlayer != null){
   mMediaPlayer.release();
   mMediaPlayer = null;
  }
 }
}

/**
 * 运行时权限申请工具类：
 * 检查用户是否授权――ContextCompat.checkSelfPermission
 * 如果没有授权，那么申请授权――ActivityCompat.requestPermissions
 * 申请授权之后的回调――onRequestPermissionsResult
 * 精髓：检查权限 申请权限的代码写在工具类内 同时写入一个接口 两个抽象方法-获取权限成功 + 获取权限失败 然后在外部使用权限工具类时实现这两个抽象方法
 * Created by Administrator on 2018/7/3.
 */
public class PermissionsUtils {
 private final int mRequestCode = 100;//权限请求码
 public static boolean showSystemSetting = true;
 private PermissionsUtils() {
 }
 private static PermissionsUtils permissionsUtils;
 private IPermissionsResult mPermissionsResult;
 /*
 * 单例模式创建PermissionUtils实例 工具类中的静态方法可以直接使用类名+方法名调用 非静态方法还是需要获取到工具类的实例 实例对方法进行调用
 * */
 public static PermissionsUtils getInstance() {
  if (permissionsUtils == null) {
   synchronized (PermissionsUtils.class) {
    if (permissionsUtils == null)
    permissionsUtils = new PermissionsUtils();
   }
  }
  return permissionsUtils;
 }
 /*
 * 检查用户是否授权 + 如果没有授权 则申请授权 - 系统标准方法
 * */
 public void chekPermissions(Activity context, String[] permissions, @NonNull IPermissionsResult permissionsResult) {
  mPermissionsResult = permissionsResult;
  if (Build.VERSION.SDK_INT < 23) {//6.0系统及以上才会动态申请权限 以下不用 所以直接return出去
   permissionsResult.passPermissons();
   return;
  }
  //创建一个mPermissionList，逐个判断哪些权限未授予，未授予的权限存储到mPerrrmissionList中
  List<String> mPermissionList = new ArrayList<>();
  //逐个判断你要的权限是否已经通过
  for (int i = 0; i < permissions.length; i++) {
   if (ContextCompat.checkSelfPermission(context, permissions[i]) != PackageManager.PERMISSION_GRANTED) {
    mPermissionList.add(permissions[i]);//添加还未授予的权限
   }
  }
  //申请权限
  if (mPermissionList.size() > 0) {//有权限没有通过，需要申请
   ActivityCompat.requestPermissions(context, permissions, mRequestCode);
  } else {
   //说明权限都已经通过，利用接口变量调用实现的接口方法 即有权限之后需要调用的方法
   permissionsResult.passPermissons();
   return;
  }
 }
 //请求权限后回调的方法
 //参数： requestCode 是我们自己定义的权限请求码
 //参数： permissions 是我们请求的权限名称数组
 //参数： grantResults 是我们在弹出页面后是否允许权限的标识数组，数组的长度对应的是权限名称数组的长度，数组的数据0表示允许权限，-1表示我们点击了禁止权限
 public void onRequestPermissionsResult(Activity context, int requestCode, @NonNull String[] permissions,
           @NonNull int[] grantResults) {
  boolean hasPermissionDismiss = false;//有权限没有通过
  if (mRequestCode == requestCode) {
   for (int i = 0; i < grantResults.length; i++) {
    if (grantResults[i] == -1) {
     hasPermissionDismiss = true;
    }
   }
   //如果有权限没有被允许
   if (hasPermissionDismiss) {
    if (showSystemSetting) {
     showSystemPermissionsSettingDialog(context);//跳转到系统设置权限页面，或者直接关闭页面，不让他继续访问
    } else {
     mPermissionsResult.forbitPermissons();
    }
   } else {
    //全部权限通过，可以进行下一步操作。。。
    mPermissionsResult.passPermissons();
   }
  }
 }
 /**
  * 不再提示权限时的展示对话框
  */
 AlertDialog mPermissionDialog;
 private void showSystemPermissionsSettingDialog(final Activity context) {
  final String mPackName = context.getPackageName();
  if (mPermissionDialog == null) {
   mPermissionDialog = new AlertDialog.Builder(context)
     .setMessage("已禁用权限，请手动授予")
     .setPositiveButton("设置", new DialogInterface.OnClickListener() {
      @Override
      public void onClick(DialogInterface dialog, int which) {
       cancelPermissionDialog();
       Uri packageURI = Uri.parse("package:" + mPackName);
       Intent intent = new Intent(Settings.ACTION_APPLICATION_DETAILS_SETTINGS, packageURI);
       context.startActivity(intent);
       context.finish();
      }
     })
     .setNegativeButton("取消", new DialogInterface.OnClickListener() {
      @Override
      public void onClick(DialogInterface dialog, int which) {
       //关闭页面或者做其他操作
       cancelPermissionDialog();
       //mContext.finish();
       mPermissionsResult.forbitPermissons();
      }
     })
     .create();
  }
  mPermissionDialog.show();
 }
 //关闭对话框
 private void cancelPermissionDialog() {
  if (mPermissionDialog != null) {
   mPermissionDialog.cancel();
   mPermissionDialog = null;
  }
 }
 public interface IPermissionsResult {
  void passPermissons();
  void forbitPermissons();
 }
}