本文为用 MediaRecorder 录制小视频的控件，可以设置视频录制的时间、空间大小、初始时是否打开摄像头等。 此控件为组合控件，继承自 LinearLayout ,为防止出错，需实现 android.media.MediaRecorder.OnErrorListener 接口。
1. [文件] MovieRecorderView.java ~ 9KB
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import
java.io.File;
import
java.io.IOException;
import
java.util.Timer;
import
java.util.TimerTask;
import
android.content.Context;
import
android.content.res.TypedArray;
import
android.hardware.Camera;
import
android.hardware.Camera.Parameters;
import
android.media.MediaRecorder;
import
android.media.MediaRecorder.AudioEncoder;
import
android.media.MediaRecorder.AudioSource;
import
android.media.MediaRecorder.OnErrorListener;
import
android.media.MediaRecorder.OutputFormat;
import
android.media.MediaRecorder.VideoEncoder;
import
android.media.MediaRecorder.VideoSource;
import
android.util.AttributeSet;
import
android.view.LayoutInflater;
import
android.view.SurfaceHolder;
import
android.view.SurfaceHolder.Callback;
import
android.view.SurfaceView;
import
android.widget.LinearLayout;
import
android.widget.ProgressBar;
import
com.contron.dgyj.R;
import
com.contron.dgyj.common.Globals;
import
com.contron.dgyj.im.ImGlobal;
import
com.lidroid.xutils.util.LogUtils;
/**
*
视频播放控件
*
*
@author liuyinjun
*
*
@date 2015-2-5
*/
public
class
MovieRecorderView extends
LinearLayout implements
OnErrorListener {
private
SurfaceView mSurfaceView;
private
SurfaceHolder mSurfaceHolder;
private
ProgressBar mProgressBar;
private
MediaRecorder mMediaRecorder;
private
Camera mCamera;
private
Timer mTimer;//
计时器
private
OnRecordFinishListener mOnRecordFinishListener;//
录制完成回调接口
private
int
mWidth;//
视频分辨率宽度
private
int
mHeight;//
视频分辨率高度
private
boolean
isOpenCamera;//
是否一开始就打开摄像头
private
int
mRecordMaxTime;//
一次拍摄最长时间
private
int
mTimeCount;//
时间计数
private
File mVecordFile = null;//
文件
public
MovieRecorderView(Context context) {
this(context,
null);
}
public
MovieRecorderView(Context context, AttributeSet attrs) {
this(context,
attrs, 0);
}
public
MovieRecorderView(Context context, AttributeSet attrs, int
defStyle) {
super(context,
attrs, defStyle);
TypedArray
a = context.obtainStyledAttributes(attrs, R.styleable.MovieRecorderView, defStyle,
0);
mWidth
= a.getInteger(R.styleable.MovieRecorderView_width, 320);//
默认320
mHeight
= a.getInteger(R.styleable.MovieRecorderView_height, 240);//
默认240
isOpenCamera
= a.getBoolean(R.styleable.MovieRecorderView_is_open_camera, true);//
默认打开
mRecordMaxTime
= a.getInteger(R.styleable.MovieRecorderView_record_max_time, 10);//
默认为10
LayoutInflater.from(context).inflate(R.layout.movie_recorder_view,
this);
mSurfaceView
= (SurfaceView) findViewById(R.id.surfaceview);
mProgressBar
= (ProgressBar) findViewById(R.id.progressBar);
mProgressBar.setMax(mRecordMaxTime);//
设置进度条最大量
mSurfaceHolder
= mSurfaceView.getHolder();
mSurfaceHolder.addCallback(new
CustomCallBack());
mSurfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
a.recycle();
}
/**
*
*
@author liuyinjun
*
*
@date 2015-2-5
*/
private
class
CustomCallBack implements
Callback {
@Override
public
void
surfaceCreated(SurfaceHolder holder) {
if
(!isOpenCamera)
return;
try
{
initCamera();
}
catch
(IOException e) {
//
TODO Auto-generated catch block
e.printStackTrace();
}
}
@Override
public
void
surfaceChanged(SurfaceHolder holder, int
format, int
width, int
height) {
}
@Override
public
void
surfaceDestroyed(SurfaceHolder holder) {
if
(!isOpenCamera)
return;
freeCameraResource();
}
}
/**
*
初始化摄像头
*
*
@author liuyinjun
*
@date 2015-2-5
*
@throws IOException
*/
private
void
initCamera() throws
IOException {
if
(mCamera != null)
{
freeCameraResource();
}
try
{
mCamera
= Camera.open();
}
catch
(Exception e) {
e.printStackTrace();
freeCameraResource();
}
if
(mCamera == null)
return;
setCameraParams();
mCamera.setDisplayOrientation(90);
mCamera.setPreviewDisplay(mSurfaceHolder);
mCamera.startPreview();
mCamera.unlock();
}
/**
*
设置摄像头为竖屏
*
*
@author liuyinjun
*
@date 2015-2-5
*/
private
void
setCameraParams() {
if
(mCamera != null)
{
Parameters
params = mCamera.getParameters();
params.set("orientation",
"portrait");
mCamera.setParameters(params);
}
}
/**
*
释放摄像头资源
*
*
@author liuyinjun
*
@date 2015-2-5
*/
private
void
freeCameraResource() {
if
(mCamera != null)
{
mCamera.setPreviewCallback(null);
mCamera.stopPreview();
mCamera.lock();
mCamera.release();
mCamera
= null;
}
}
private
void
createRecordDir() {
File
sampleDir = new
File(Environment.getExternalStorageDirectory() + File.separator + "im/video/");
if
(!sampleDir.exists()) {
sampleDir.mkdirs();
}
File
vecordDir = sampleDir;
//
创建文件
try
{
mVecordFile
= File.createTempFile("recording",
".mp4",
vecordDir);//mp4格式
LogUtils.i(mVecordFile.getAbsolutePath());
}
catch
(IOException e) {
}
}
/**
*
初始化
*
*
@author liuyinjun
*
@date 2015-2-5
*
@throws IOException
*/
private
void
initRecord() throws
IOException {
mMediaRecorder
= new
MediaRecorder();
mMediaRecorder.reset();
if
(mCamera != null)
mMediaRecorder.setCamera(mCamera);
mMediaRecorder.setOnErrorListener(this);
mMediaRecorder.setPreviewDisplay(mSurfaceHolder.getSurface());
mMediaRecorder.setVideoSource(VideoSource.CAMERA);//
视频源
mMediaRecorder.setAudioSource(AudioSource.MIC);//
音频源
mMediaRecorder.setOutputFormat(OutputFormat.MPEG_4);//
视频输出格式
mMediaRecorder.setAudioEncoder(AudioEncoder.AMR_NB);//
音频格式
mMediaRecorder.setVideoSize(mWidth,
mHeight);//
设置分辨率：
//
mMediaRecorder.setVideoFrameRate(16);// 这个我把它去掉了，感觉没什么用
mMediaRecorder.setVideoEncodingBitRate(1
* 1024
* 512);//
设置帧频率，然后就清晰了
mMediaRecorder.setOrientationHint(90);//
输出旋转90度，保持竖屏录制
mMediaRecorder.setVideoEncoder(VideoEncoder.MPEG_4_SP);//
视频录制格式
//
mediaRecorder.setMaxDuration(Constant.MAXVEDIOTIME * 1000);
mMediaRecorder.setOutputFile(mVecordFile.getAbsolutePath());
mMediaRecorder.prepare();
try
{
mMediaRecorder.start();
}
catch
(IllegalStateException e) {
e.printStackTrace();
}
catch
(RuntimeException e) {
e.printStackTrace();
}
catch
(Exception e) {
e.printStackTrace();
}
}
/**
*
开始录制视频
*
*
@author liuyinjun
*
@date 2015-2-5
*
@param fileName
*
视频储存位置
*
@param onRecordFinishListener
*
达到指定时间之后回调接口
*/
public
void
record(final
OnRecordFinishListener onRecordFinishListener) {
this.mOnRecordFinishListener
= onRecordFinishListener;
createRecordDir();
try
{
if
(!isOpenCamera)//
如果未打开摄像头，则打开
initCamera();
initRecord();
mTimeCount
= 0;//
时间计数器重新赋值
mTimer
= new
Timer();
mTimer.schedule(new
TimerTask() {
@Override
public
void
run() {
//
TODO Auto-generated method stub
mTimeCount++;
mProgressBar.setProgress(mTimeCount);//
设置进度条
if
(mTimeCount == mRecordMaxTime) {//
达到指定时间，停止拍摄
stop();
if
(mOnRecordFinishListener != null)
mOnRecordFinishListener.onRecordFinish();
}
}
},
0,
1000);
}
catch
(IOException e) {
e.printStackTrace();
}
}
/**
*
停止拍摄
*
*
@author liuyinjun
*
@date 2015-2-5
*/
public
void
stop() {
stopRecord();
releaseRecord();
freeCameraResource();
}
/**
*
停止录制
*
*
@author liuyinjun
*
@date 2015-2-5
*/
public
void
stopRecord() {
mProgressBar.setProgress(0);
if
(mTimer != null)
mTimer.cancel();
if
(mMediaRecorder != null)
{
//
设置后不会崩
mMediaRecorder.setOnErrorListener(null);
mMediaRecorder.setPreviewDisplay(null);
try
{
mMediaRecorder.stop();
}
catch
(IllegalStateException e) {
e.printStackTrace();
}
catch
(RuntimeException e) {
e.printStackTrace();
}
catch
(Exception e) {
e.printStackTrace();
}
}
}
/**
*
释放资源
*
*
@author liuyinjun
*
@date 2015-2-5
*/
private
void
releaseRecord() {
if
(mMediaRecorder != null)
{
mMediaRecorder.setOnErrorListener(null);
try
{
mMediaRecorder.release();
}
catch
(IllegalStateException e) {
e.printStackTrace();
}
catch
(Exception e) {
e.printStackTrace();
}
}
mMediaRecorder
= null;
}
public
int
getTimeCount() {
return
mTimeCount;
}
/**
*
@return the mVecordFile
*/
public
File getmVecordFile() {
return
mVecordFile;
}
/**
*
录制完成回调接口
*
*
@author liuyinjun
*
*
@date 2015-2-5
*/
public
interface
OnRecordFinishListener {
public
void
onRecordFinish();
}
@Override
public
void
onError(MediaRecorder mr, int
what, int
extra) {
try
{
if
(mr != null)
mr.reset();
}
catch
(IllegalStateException e) {
e.printStackTrace();
}
catch
(Exception e) {
e.printStackTrace();
}
}
}
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2. [文件] movie_recorder_view.xml ~ 747B
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<?xml
version="1.0"
encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@android:color/background_dark"
android:orientation="vertical">
<SurfaceView
android:id="@+id/surfaceview"
android:layout_width="fill_parent"
android:layout_height="0dp"
android:layout_weight="1"
/>
<ProgressBar
android:id="@+id/progressBar"
style="?android:attr/progressBarStyleHorizontal"
android:layout_width="match_parent"
android:layout_height="2dp"
/>
</LinearLayout>
有问题，欢迎交流与学习！
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