【实例简介】

【实例截图】

【核心代码】

package com.example.videorecorddemo;

import java.io.IOException;

import java.util.Date;

import java.util.Timer;

import java.util.TimerTask;

import android.hardware.Camera;

import android.media.CamcorderProfile;

import android.media.MediaRecorder;

import android.os.Environment;

import android.util.Log;

import android.view.SurfaceHolder;

import android.view.SurfaceView;

/**

* 录像线程

*

* @author bcaiw

*

*/

public class RecordThread extends Thread {

private String TAG = "RecordThread";

private MediaRecorder mediarecorder;// 录制视频的类

private SurfaceHolder surfaceHolder;

private long recordTime;

private SurfaceView surfaceview;// 显示视频的控件

private Camera mCamera;

public RecordThread(long recordTime, SurfaceView surfaceview,

SurfaceHolder surfaceHolder) {

Log.i(TAG, "RecordThread");

this.recordTime = recordTime;

this.surfaceview = surfaceview;

this.surfaceHolder = surfaceHolder;

}

@Override

public void run() {

Log.i(TAG, "run()");

/**

* 开始录像

*/

startRecord();

/**

* 启动定时器，到规定时间recordTime后执行停止录像任务

*/

Timer timer = new Timer();

timer.schedule(new TimerThread(), recordTime);

}

/**

* 获取摄像头实例对象，可以选在前置或者后置摄像头

*

* @return

*/

private Camera getCameraInstance(boolean facingfront) {

int facing;

Camera cam = null;

Camera.CameraInfo cameraInfo = new Camera.CameraInfo();

if(facingfront)

facing = Camera.CameraInfo.CAMERA_FACING_FRONT;

else

facing = Camera.CameraInfo.CAMERA_FACING_BACK;

for (int camIdx = 0, cameraCount = Camera.getNumberOfCameras(); camIdx < cameraCount; camIdx ) {

Camera.getCameraInfo(camIdx, cameraInfo);

if (cameraInfo.facing == facing) {

try {

cam = Camera.open(camIdx);

break;

} catch (RuntimeException e) {

e.printStackTrace();

}

}

}

return cam;

}

/**

* 开始录像

*/

public void startRecord() {

Log.i(TAG, "startRecord()");

mediarecorder = new MediaRecorder();// 创建mediarecorder对象

mCamera = getCameraInstance(true);

// 解锁camera

mCamera.unlock();

mediarecorder.setCamera(mCamera);

// 设置录制视频源为Camera(相机)

mediarecorder.setAudioSource(MediaRecorder.AudioSource.CAMCORDER);

mediarecorder.setVideoSource(MediaRecorder.VideoSource.CAMERA);

// 设置录制文件质量，格式，分辨率之类，这个全部包括了

mediarecorder.setProfile(CamcorderProfile.get(CamcorderProfile.QUALITY_LOW));

mediarecorder.setPreviewDisplay(surfaceHolder.getSurface());

// 设置视频文件输出的路径

String filePath = Environment.getExternalStorageDirectory() "/SilentRecordService/Media/VideRecordDemo.mp4";

Log.i(TAG, "startRecord(), filePath: " filePath);

mediarecorder.setOutputFile(filePath);

/*

mediarecorder = new MediaRecorder();// 创建mediarecorder对象

// 设置录制音频源为Mic

mediarecorder.setAudioSource(MediaRecorder.AudioSource.MIC);

// 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.MPEG_4);

//

//mediarecorder.setAudioSamplingRate(DEFAULT_SAMPLING_RATE);

//

//mediarecorder.setAudioChannels(AudioFormat.CHANNEL_IN_MONO);

// 设置录制的音频编码

mediarecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AAC);

// 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(15);

mediarecorder.setPreviewDisplay(surfaceHolder.getSurface());

// 设置视频文件输出的路径

mediarecorder.setOutputFile(Environment.getExternalStorageDirectory() "/SilentRecordService/Media/VideRecordDemo.mp4");

*/

try {

// 准备录制

Log.i(TAG, "mediarecorder.prepare()");

mediarecorder.prepare();

// 开始录制

Log.i(TAG, "mediarecorder.start()");

mediarecorder.start();

} catch (IllegalStateException e) {

// TODO Auto-generated catch block

e.printStackTrace();

} catch (IOException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

}

/**

* 停止录制

*/

public void stopRecord() {

Log.i(TAG, "stopRecord()");

if (mediarecorder != null) {

// 停止录制

mediarecorder.stop();

// 释放资源

mediarecorder.release();

mediarecorder = null;

if (mCamera != null) {

mCamera.release();

mCamera = null;

}

}

}

/**

* 定时器

*

* @author bcaiw

*

*/

class TimerThread extends TimerTask {

/**

* 停止录像

*/

@Override

public void run() {

Log.i(TAG, "TimerThread, run()");

stopRecord();

this.cancel();

}

}

}