Android MediaRecorder

AndroidManifest.xml中添加权限标记

<uses-permission android:name="android.permission.RECORD_AUDIO"/>

动态添加权限MainActivity

requestPermissions(new String[]{Manifest.permission.CAMERA,Manifest.permission.RECORD_AUDIO},100);

创建MediaRecordActivity，使用Intent连接MainActivity和MediaRecordActivity

startActivity(new Intent(this,MediaRecordActivity.class));

MediaRecordActivity中设置MediaRecorder

@Overridepublic void onClick(View view) {CharSequence text =btn_opt.getText();if (TextUtils.equals(text,"开始")){btn_opt.setText("结束");camera = Camera.open();   //原始Android Camera类已废弃。应使用CameraX（推荐）或Camera2camera.setDisplayOrientation(90);camera.unlock();mediaRecorder = new MediaRecorder();mediaRecorder.setCamera(camera);mediaRecorder.setAudioSource(MediaRecorder.AudioSource.MIC); //设置音频源 麦克风mediaRecorder.setVideoSource(MediaRecorder.VideoSource.CAMERA); //视频源 摄像头mediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.MPEG_4);//指定视频文件格式mediaRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AAC);//设置音频格式mediaRecorder.setVideoEncoder(MediaRecorder.VideoEncoder.H264);//设置视频格式mediaRecorder.setOrientationHint(90);//设置视频输出文件mediaRecorder.setOutputFile(new File(getExternalFilesDir(""),"b.mp4").getAbsolutePath());mediaRecorder.setVideoSize(640,480);mediaRecorder.setPreviewDisplay(new Surface(textureView.getSurfaceTexture()));try {mediaRecorder.prepare();} catch (IOException e) {e.printStackTrace();}mediaRecorder.start();}else {btn_opt.setText("开始");mediaRecorder.stop();mediaRecorder.release();camera.stopPreview();camera.release();}}

MediaRecorder状态图