Android开发(18) 摄像和播放

     mediarecorder = new MediaRecorder();// 创建mediarecorder对象
    
    // 设置录制视频源为Camera(相机)
    mediarecorder.setVideoSource(MediaRecorder.VideoSource.CAMERA);
    // 设置录制完成后视频的封装格式THREE_GPP为3gp.MPEG_4为mp4
    mediarecorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
    // 设置录制的视频编码h263 h264
    mediarecorder.setVideoEncoder(MediaRecorder.VideoEncoder.H264);
    // 设置视频录制的分辨率。必须放在设置编码和格式的后面，否则报错
    mediarecorder.setVideoSize(176, 144);
    // 设置录制的视频帧率。必须放在设置编码和格式的后面，否则报错
    mediarecorder.setVideoFrameRate(20);
    mediarecorder.setPreviewDisplay(surfaceView.getHolder().getSurface());
    // 设置视频文件输出的路径
    lastFileName = newFileName();
    mediarecorder.setOutputFile(lastFileName);
    try {
        // 准备录制
        mediarecorder.prepare();
        // 开始录制
        mediarecorder.start();
    } catch (IllegalStateException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    } catch (IOException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }

    if (mediarecorder != null) {
    // 停止
    mediarecorder.stop();
    mediarecorder.release();
    mediarecorder = null;
    } 

package zyf.demo.moviedemo;

import java.io.File;
import java.io.IOException;
import java.util.Timer;
import java.util.TimerTask;

import android.media.MediaRecorder;
import android.view.SurfaceView;

public class MovieRecorder {
    private MediaRecorder mediarecorder;
    boolean isRecording;

    public void startRecording(SurfaceView surfaceView) {
        mediarecorder = new MediaRecorder();// 创建mediarecorder对象
        // 设置录制视频源为Camera(相机)
        mediarecorder.setVideoSource(MediaRecorder.VideoSource.CAMERA);
        // 设置录制完成后视频的封装格式THREE_GPP为3gp.MPEG_4为mp4
        mediarecorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
        // 设置录制的视频编码h263 h264
        mediarecorder.setVideoEncoder(MediaRecorder.VideoEncoder.H264);
        // 设置视频录制的分辨率。必须放在设置编码和格式的后面，否则报错
        mediarecorder.setVideoSize(176, 144);
        // 设置录制的视频帧率。必须放在设置编码和格式的后面，否则报错
        mediarecorder.setVideoFrameRate(20);
        mediarecorder.setPreviewDisplay(surfaceView.getHolder().getSurface());
        // 设置视频文件输出的路径
        lastFileName = newFileName();
        mediarecorder.setOutputFile(lastFileName);
        try {
            // 准备录制
            mediarecorder.prepare();
            // 开始录制
            mediarecorder.start();
        } catch (IllegalStateException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        isRecording = true;
        timeSize = 0;
        timer = new Timer();
        timer.schedule(new TimerTask() {

            @Override
            public void run() {
                // TODO Auto-generated method stub
                timeSize++;
            }
        }, 0,1000);
    }

    Timer timer;
    int timeSize = 0;

    private String lastFileName;

    public void stopRecording() {
        if (mediarecorder != null) {
            // 停止
            mediarecorder.stop();
            mediarecorder.release();
            mediarecorder = null;

            timer.cancel();
            if (null != lastFileName && !"".equals(lastFileName)) {
                File f = new File(lastFileName);
                String name = f.getName().substring(0,
                        f.getName().lastIndexOf(".3gp"));
                name += "_" + timeSize + "s.3gp";
                String newPath = f.getParentFile().getAbsolutePath() + "/"
                        + name;
                if (f.renameTo(new File(newPath))) {
                    int i = 0;
                    i++;
                }
            }
        }
    }

    public String newFileName() {
        try {
            return File.createTempFile("/mov_", ".3gp").getAbsolutePath();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
            return null;
        }
    }

    public void release() {
        if (mediarecorder != null) {
            // 停止
            mediarecorder.stop();
            mediarecorder.release();
            mediarecorder = null;
        }
    } }

     public void play(String fileName, SurfaceView view) {
    
            mPlayer = new MediaPlayer();
            mPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
            mPlayer.setDisplay(view.getHolder()); // 定义一个SurfaceView播放它
             
            mPlayer.setOnCompletionListener(new OnCompletionListener() {
             
            @Override
            public void onCompletion(MediaPlayer arg0) {
            stop();
             
            // canvas.drawColor(Color.TRANSPARENT,
            // PorterDuff.Mode.CLEAR);
    }
    });
     
        try {
            mPlayer.setDataSource(fileName);
            mPlayer.prepare();
        } catch (IllegalStateException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
            mPlayer.start();
    }

    public void stop() {
        if (mPlayer != null) {
            mPlayer.release();
            mPlayer = null;
        }
    }