Android录制视频，第一部分自定义控件
简述
公司有一个录制视频并上传的功能，录制视频具体使用类如下：硬件控制使用Camera，视频录制的格式音频等具体配置与录制使用MediaRecorder，预览使用SurfaceView。在网上找了一个项目，后来经过自己加工完善，可以比较稳定的使用。内容较多分为几个篇幅来说吧，第一篇先说一下封装的录制控件，第二篇有具体的使用，第三篇讲一下其他一些扩展延伸。
具体实现
自定义了一个控件MovieRecorderView，封装了包括视频的录制、视频的预览、视频的保存、与录制进度监听等功能。具体可以参考代码，注释也是比较详细的。
代码
控件代码部分 MovieRecorderView.java
import android.annotation.TargetApi;
import android.app.Activity;
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.os.Build;
import android.os.Environment;
import android.util.AttributeSet;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.SurfaceHolder;
import android.view.SurfaceHolder.Callback;
import android.view.SurfaceView;
import android.widget.LinearLayout;
import java.io.File;
import java.io.IOException;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;
import java.util.Timer;
import java.util.TimerTask;
/**
* 视频播放控件
* Created by Wood on 2016/4/6.
*/
public class MovieRecorderView extends LinearLayout implements OnErrorListener {
private static final String LOG_TAG = "MovieRecorderView";
private Context context;
private SurfaceView surfaceView;
private SurfaceHolder surfaceHolder;
//private ProgressBar progressBar;
private MediaRecorder mediaRecorder;
private Camera camera;
private Timer timer;//计时器
private int mWidth;//视频录制分辨率宽度
private int mHeight;//视频录制分辨率高度
private boolean isOpenCamera;//是否一开始就打开摄像头
private int recordMaxTime;//最长拍摄时间
private int timeCount;//时间计数
private File recordFile = null;//视频文件
private long sizePicture = 0;
public MovieRecorderView(Context context) {
this(context, null);
}
public MovieRecorderView(Context context, AttributeSet attrs) {
this(context, attrs, 0);
}
@TargetApi(Build.VERSION_CODES.HONEYCOMB)
public MovieRecorderView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
this.context = context;
TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.MovieRecorderView, defStyle, 0);
mWidth = a.getInteger(R.styleable.MovieRecorderView_record_width, 640);//默认640
mHeight = a.getInteger(R.styleable.MovieRecorderView_record_height, 360);//默认360
isOpenCamera = a.getBoolean(R.styleable.MovieRecorderView_is_open_camera, true);//默认打开摄像头
recordMaxTime = a.getInteger(R.styleable.MovieRecorderView_record_max_time, 10);//默认最大拍摄时间为10s
LayoutInflater.from(context).inflate(R.layout.movie_recorder_view, this);
surfaceView = (SurfaceView) findViewById(R.id.surface_view);
//TODO 需要用到进度条，打开此处，也可以自己定义自己需要的进度条，提供了拍摄进度的接口
//progressBar = (ProgressBar) findViewById(R.id.progress_bar);
//progressBar.setMax(recordMaxTime);//设置进度条最大量
surfaceHolder = surfaceView.getHolder();
surfaceHolder.addCallback(new CustomCallBack());
surfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
a.recycle();
}
/**
* SurfaceHolder回调
*/
private class CustomCallBack implements Callback {
@Override
public void surfaceCreated(SurfaceHolder holder) {
if (!isOpenCamera)
return;
try {
initCamera();
} catch (IOException e) {
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
*/
public void initCamera() throws IOException {
if (camera != null) {
freeCameraResource();
}
try {
if (checkCameraFacing(Camera.CameraInfo.CAMERA_FACING_FRONT)) {
camera = Camera.open(Camera.CameraInfo.CAMERA_FACING_FRONT);//TODO 默认打开前置摄像头
} else if (checkCameraFacing(Camera.CameraInfo.CAMERA_FACING_BACK)) {
camera = Camera.open(Camera.CameraInfo.CAMERA_FACING_BACK);
}
} catch (Exception e) {
e.printStackTrace();
freeCameraResource();
((Activity) context).finish();
}
if (camera == null)
return;
setCameraParams();
camera.setDisplayOrientation(90);
camera.setPreviewDisplay(surfaceHolder);
camera.startPreview();
camera.unlock();
}
/**
* 检查是否有摄像头
*
* @param facing 前置还是后置
* @return
*/
private boolean checkCameraFacing(int facing) {
int cameraCount = Camera.getNumberOfCameras();
Camera.CameraInfo info = new Camera.CameraInfo();
for (int i = 0; i < cameraCount; i++) {
Camera.getCameraInfo(i, info);
if (facing == info.facing) {
return true;
}
}
return false;
}
/**
* 设置摄像头为竖屏
*/
private void setCameraParams() {
if (camera != null) {
Parameters params = camera.getParameters();
params.set("orientation", "portrait");
List<Camera.Size> supportedPictureSizes = params.getSupportedPictureSizes();
for (Camera.Size size : supportedPictureSizes) {
sizePicture = (size.height * size.width) > sizePicture ? size.height * size.width : sizePicture;
}
// LogUtil.e(LOG_TAG,"手机支持的最大像素supportedPictureSizes===="+sizePicture);
setPreviewSize(params);
camera.setParameters(params);
}
}
/**
* 根据手机支持的视频分辨率，设置预览尺寸
*
* @param params
*/
private void setPreviewSize(Parameters params) {
if (camera == null) {
return;
}
//获取手机支持的分辨率集合，并以宽度为基准降序排序
List<Camera.Size> previewSizes = params.getSupportedPreviewSizes();
Collections.sort(previewSizes, new Comparator<Camera.Size>() {
@Override
public int compare(Camera.Size lhs, Camera.Size rhs) {
if (lhs.width > rhs.width) {
return -1;
} else if (lhs.width == rhs.width) {
return 0;
} else {
return 1;
}
}
});
float tmp = 0f;
float minDiff = 100f;
float ratio = 3.0f / 4.0f;//TODO 高宽比率3:4，且最接近屏幕宽度的分辨率，可以自己选择合适的想要的分辨率
Camera.Size best = null;
for (Camera.Size s : previewSizes) {
tmp = Math.abs(((float) s.height / (float) s.width) - ratio);
Log.e(LOG_TAG, "setPreviewSize: width:" + s.width + "...height:" + s.height);
// LogUtil.e(LOG_TAG,"tmp:" + tmp);
if (tmp < minDiff) {
minDiff = tmp;
best = s;
}
}
// LogUtil.e(LOG_TAG, "BestSize: width:" + best.width + "...height:" + best.height);
// List<int[]> range = params.getSupportedPreviewFpsRange();
// int[] fps = range.get(0);
// LogUtil.e(LOG_TAG,"min="+fps[0]+",max="+fps[1]);
// params.setPreviewFpsRange(3,7);
params.setPreviewSize(best.width, best.height);//预览比率
// params.setPictureSize(480, 720);//拍照保存比率
Log.e(LOG_TAG, "setPreviewSize BestSize: width:" + best.width + "...height:" + best.height);
//TODO 大部分手机支持的预览尺寸和录制尺寸是一样的，也有特例，有些手机获取不到，那就把设置录制尺寸放到设置预览的方法里面
if (params.getSupportedVideoSizes() == null || params.getSupportedVideoSizes().size() == 0) {
mWidth = best.width;
mHeight = best.height;
} else {
setVideoSize(params);
}
}
/**
* 根据手机支持的视频分辨率，设置录制尺寸
*
* @param params
*/
private void setVideoSize(Parameters params) {
if (camera == null) {
return;
}
//获取手机支持的分辨率集合，并以宽度为基准降序排序
List<Camera.Size> previewSizes = params.getSupportedVideoSizes();
Collections.sort(previewSizes, new Comparator<Camera.Size>() {
@Override
public int compare(Camera.Size lhs, Camera.Size rhs) {
if (lhs.width > rhs.width) {
return -1;
} else if (lhs.width == rhs.width) {
return 0;
} else {
return 1;
}
}
});
float tmp = 0f;
float minDiff = 100f;
float ratio = 3.0f / 4.0f;//高宽比率3:4，且最接近屏幕宽度的分辨率
Camera.Size best = null;
for (Camera.Size s : previewSizes) {
tmp = Math.abs(((float) s.height / (float) s.width) - ratio);
Log.e(LOG_TAG, "setVideoSize: width:" + s.width + "...height:" + s.height);
if (tmp < minDiff) {
minDiff = tmp;
best = s;
}
}
Log.e(LOG_TAG, "setVideoSize BestSize: width:" + best.width + "...height:" + best.height);
//设置录制尺寸
mWidth = best.width;
mHeight = best.height;
}
/**
* 释放摄像头资源
*/
private void freeCameraResource() {
try {
if (camera != null) {
camera.setPreviewCallback(null);
camera.stopPreview();
camera.lock();
camera.release();
camera = null;
}
} catch (Exception e) {
e.printStackTrace();
} finally {
camera = null;
}
}
/**
* 创建视频文件
*/
private void createRecordDir() {
File sampleDir = new File(Environment.getExternalStorageDirectory() + File.separator + "SampleVideo/video/");
if (!sampleDir.exists()) {
sampleDir.mkdirs();
}
try {
//TODO 文件名用的时间戳，可根据需要自己设置，格式也可以选择3gp，在初始化设置里也需要修改
recordFile = new File(sampleDir, System.currentTimeMillis() + ".mp4");
// recordFile = new File(sampleDir, System.currentTimeMillis() + ".mp4");
// File.createTempFile(AccountInfo.userId, ".mp4", sampleDir);
// LogUtil.e(LOG_TAG, recordFile.getAbsolutePath());
} catch (Exception e) {
e.printStackTrace();
}
}
/**
* 录制视频初始化
*/
private void initRecord() throws Exception {
mediaRecorder = new MediaRecorder();
mediaRecorder.reset();
if (camera != null)
mediaRecorder.setCamera(camera);
mediaRecorder.setOnErrorListener(this);
mediaRecorder.setPreviewDisplay(surfaceHolder.getSurface());
mediaRecorder.setVideoSource(VideoSource.CAMERA);//视频源
mediaRecorder.setAudioSource(AudioSource.MIC);//音频源
mediaRecorder.setOutputFormat(OutputFormat.MPEG_4);//TODO 视频输出格式 也可设为3gp等其他格式
mediaRecorder.setAudioEncoder(AudioEncoder.AMR_NB);//音频格式
mediaRecorder.setVideoSize(mWidth, mHeight);//设置分辨率
// mediaRecorder.setVideoFrameRate(25);//TODO 设置每秒帧数 这个设置有可能会出问题，有的手机不支持这种帧率就会录制失败，这里使用默认的帧率，当然视频的大小肯定会受影响
// LogUtil.e(LOG_TAG,"手机支持的最大像素supportedPictureSizes===="+sizePicture);
if (sizePicture < 3000000) {//这里设置可以调整清晰度
mediaRecorder.setVideoEncodingBitRate(3 * 1024 * 512);
} else if (sizePicture <= 5000000) {
mediaRecorder.setVideoEncodingBitRate(2 * 1024 * 512);
} else {
mediaRecorder.setVideoEncodingBitRate(1 * 1024 * 512);
}
mediaRecorder.setOrientationHint(270);//输出旋转90度，保持竖屏录制
mediaRecorder.setVideoEncoder(VideoEncoder.H264);//视频录制格式
//mediaRecorder.setMaxDuration(Constant.MAXVEDIOTIME * 1000);
mediaRecorder.setOutputFile(recordFile.getAbsolutePath());
mediaRecorder.prepare();
mediaRecorder.start();
}
/**
* 开始录制视频
*
* @param onRecordFinishListener 达到指定时间之后回调接口
*/
public void record(final OnRecordFinishListener onRecordFinishListener) {
this.onRecordFinishListener = onRecordFinishListener;
createRecordDir();
try {
//如果未打开摄像头，则打开
if (!isOpenCamera)
initCamera();
initRecord();
timeCount = 0;//时间计数器重新赋值
timer = new Timer();
timer.schedule(new TimerTask() {
@Override
public void run() {
timeCount++;
//progressBar.setProgress(timeCount);//设置进度条
if (onRecordProgressListener != null) {
onRecordProgressListener.onProgressChanged(recordMaxTime, timeCount);
}
//达到指定时间，停止拍摄
if (timeCount == recordMaxTime) {
stop();
if (MovieRecorderView.this.onRecordFinishListener != null)
MovieRecorderView.this.onRecordFinishListener.onRecordFinish();
}
}
}, 0, 1000);
} catch (Exception e) {
e.printStackTrace();
if (mediaRecorder != null) {
mediaRecorder.release();
}
freeCameraResource();
}
}
/**
* 停止拍摄
*/
public void stop() {
stopRecord();
releaseRecord();
freeCameraResource();
}
/**
* 停止录制
*/
public void stopRecord() {
//progressBar.setProgress(0);
if (timer != null)
timer.cancel();
if (mediaRecorder != null) {
mediaRecorder.setOnErrorListener(null);//设置后防止崩溃
mediaRecorder.setPreviewDisplay(null);
try {
mediaRecorder.stop();
} catch (Exception e) {
e.printStackTrace();
}
}
}
/**
* 释放资源
*/
private void releaseRecord() {
if (mediaRecorder != null) {
mediaRecorder.setOnErrorListener(null);
try {
mediaRecorder.release();
} catch (Exception e) {
e.printStackTrace();
}
}
mediaRecorder = null;
}
/**
* 获取当前录像时间
*
* @return timeCount
*/
public int getTimeCount() {
return timeCount;
}
/**
* 设置最大录像时间
*
* @param recordMaxTime
*/
public void setRecordMaxTime(int recordMaxTime) {
this.recordMaxTime = recordMaxTime;
}
/**
* 返回录像文件
*
* @return recordFile
*/
public File getRecordFile() {
return recordFile;
}
/**
* 录制完成监听
*/
private OnRecordFinishListener onRecordFinishListener;
/**
* 录制完成接口
*/
public interface OnRecordFinishListener {
void onRecordFinish();
}
/**
* 录制进度监听
*/
private OnRecordProgressListener onRecordProgressListener;
/**
* 设置录制进度监听
*
* @param onRecordProgressListener
*/
public void setOnRecordProgressListener(OnRecordProgressListener onRecordProgressListener) {
this.onRecordProgressListener = onRecordProgressListener;
}
/**
* 录制进度接口
*/
public interface OnRecordProgressListener {
/**
* 进度变化
*
* @param maxTime 最大时间，单位秒
* @param currentTime 当前进度
*/
void onProgressChanged(int maxTime, int currentTime);
}
@Override
public void onError(MediaRecorder mr, int what, int extra) {
try {
if (mr != null)
mr.reset();
} catch (Exception e) {
e.printStackTrace();
}
}
}xml布局部分 movie_recorder_view.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@android:color/background_dark"
android:orientation="vertical">
<SurfaceView
android:id="@+id/surface_view"
android:layout_width="fill_parent"
android:layout_height="0dp"
android:layout_weight="1" />
<!--下方提供进度条，已经隐藏，需要可以打开。Used to display progress,hidden by default -->
<ProgressBar
android:id="@+id/progress_bar"
style="?android:attr/progressBarStyleHorizontal"
android:layout_width="match_parent"
android:layout_height="2dp"
android:visibility="gone" />
</LinearLayout>
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