SurfaceView录制视频

来源：互联网发布：《大数据时代》电子书编辑：程序博客网时间：2024/06/05 12:40
public class CameraView extends SurfaceView implements SurfaceHolder.Callback {    private Camera camera;    private Context context;    private SurfaceHolder surfaceHolder;    private boolean isRunning = false;    private MediaRecorder mediaRecorder;    //====================================    private boolean mStartedFlg = false;    private String path = "";    public CameraView(Context context) {        super(context);        initData(context);    }    public CameraView(Context context, AttributeSet attrs) {        super(context, attrs);        initData(context);    }    public CameraView(Context context, AttributeSet attrs, int defStyleAttr) {        super(context, attrs, defStyleAttr);        initData(context);    }    private void initData(Context context) {        this.context = context;        surfaceHolder = getHolder();        surfaceHolder.addCallback(this);//        surfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);    }    @Override    public void surfaceCreated(SurfaceHolder surfaceHolder) {        startPreView(surfaceHolder);    }    @Override    public void surfaceChanged(SurfaceHolder surfaceHolder, int i, int i1, int i2) {    }    @Override    public void surfaceDestroyed(SurfaceHolder surfaceHolder) {        if (mediaRecorder != null) {            mediaRecorder.release();            mediaRecorder = null;        }        releaseCamera();    }    public void starRecordVideo() {        if (!mStartedFlg) {            if (mediaRecorder == null) {                mediaRecorder = new MediaRecorder();            }            try {                /**                 * 解锁camera                 * 设置输出格式为mpeg_4（mp4），此格式音频编码格式必须为AAC否则网页无法播放                 */                camera.unlock();                mediaRecorder.setCamera(camera);                mediaRecorder.setAudioSource(MediaRecorder.AudioSource.CAMCORDER);                mediaRecorder.setVideoSource(MediaRecorder.VideoSource.CAMERA);                mediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.MPEG_4);                //音频编码格式对应应为AAC                mediaRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AAC);                //视频编码格式对应应为H264                mediaRecorder.setVideoEncoder(MediaRecorder.VideoEncoder.H264);                mediaRecorder.setVideoSize(640, 480);                mediaRecorder.setVideoEncodingBitRate(600 * 1024);                mediaRecorder.setPreviewDisplay(surfaceHolder.getSurface());                /**                 * 设置输出地址                 */                String sdPath = getSDPath();                if (sdPath != null) {                    File dir = new File(sdPath + "/VideoAndAudio");                    if (!dir.exists()) {                        dir.mkdir();                    }                    path = dir + "/" + getDate() + ".mp4";                    mediaRecorder.setOutputFile(path);                    mediaRecorder.setOrientationHint(90);                    mediaRecorder.prepare();                    mediaRecorder.start();                    mStartedFlg = true;                }            } catch (Exception e) {                e.printStackTrace();            }        } else {            if (mStartedFlg) {                try {                    mediaRecorder.stop();                    mediaRecorder.reset();                    mStartedFlg = false;                } catch (Exception e) {                    e.printStackTrace();                }            }            mStartedFlg = false;        }    }    /**     * 开启预览     *     * @param holder     */    private void startPreView(SurfaceHolder holder) {        try {            if (camera == null) {                camera = Camera.open(Camera.CameraInfo.CAMERA_FACING_BACK);            }            if (mediaRecorder == null) {                mediaRecorder = new MediaRecorder();            }            if (mediaRecorder != null) {                camera.setDisplayOrientation(90);                camera.setPreviewDisplay(holder);                Camera.Parameters parameters = camera.getParameters();                /**                 * Camera自动对焦                 */                List<String> focusModes = parameters.getSupportedFocusModes();                if (focusModes != null) {                    for (String mode : focusModes) {                        mode.contains("continuous-video");                        parameters.setFocusMode("continuous-video");                    }                }                camera.setParameters(parameters);                camera.startPreview();            }        } catch (Exception e) {            e.printStackTrace();        }    }    public void onPause() {        mStartedFlg = false;        // 如果正在使用MediaRecorder，首先需要释放它。        releaseMediaRecorder();        // 在暂停事件中立即释放摄像头        releaseCamera();    }    private void releaseMediaRecorder() {        if (mediaRecorder != null) {            // 清除recorder配置            mediaRecorder.reset();            // 释放recorder对象            mediaRecorder.release();            mediaRecorder = null;            // 为后续使用锁定摄像头            camera.lock();        }    }    private void releaseCamera() {        if (camera != null) {            // 为其它应用释放摄像头            camera.release();            camera = null;        }    }    /**     * 获取系统时间     *     * @return     */    public static String getDate() {        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        int minute = ca.get(Calendar.MINUTE);       // 分        int hour = ca.get(Calendar.HOUR);           // 小时        int second = ca.get(Calendar.SECOND);       // 秒        String date = "" + year + (month + 1) + day + hour + minute + second;        Log.d("date", "date:" + date);        return date;    }    /**     * 获取SD path     *     * @return     */    public String getSDPath() {        File sdDir = null;        boolean sdCardExist = Environment.getExternalStorageState()                .equals(Environment.MEDIA_MOUNTED); // 判断sd卡是否存在        if (sdCardExist) {            sdDir = Environment.getExternalStorageDirectory();// 获取跟目录            return sdDir.toString();        }        return null;    }}
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