Android 间断录制和播放实现

来源：互联网发布：java 进程创建原语编辑：程序博客网时间：2024/06/13 05:22

功能列表如下：

1. 触摸屏幕开始录制，松开后录制结束，接着触摸屏幕继续录制，直到录满6秒位置。

2. 录制完毕后，点击向右的箭头讲刚录制的视频进行播放。

3. 支持前后摄像头的切换。

layout:

<RelativeLayout 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="@color/solid_black"      tools:context=".MainActivity" >        <RelativeLayout          android:id="@id/root_layout"          android:layout_width="fill_parent"          android:layout_height="fill_parent" >            <RelativeLayout              android:id="@id/top_mask"              android:layout_width="fill_parent"              android:layout_height="@dimen/capture_top_mask" >                <cn.wodong.capturevideo.ProgressView                  android:id="@id/progress"                  android:layout_width="fill_parent"                  android:layout_height="48.0dip"                  android:background="@color/bg_capture_progress" />                <LinearLayout                  android:id="@id/cancel"                  android:layout_width="56.0dip"                  android:layout_height="fill_parent"                  android:layout_alignParentLeft="true"                  android:layout_centerVertical="true"                  android:gravity="center"                  android:onClick="onBackPressed" >                    <Button                      android:layout_width="32.0dip"                      android:layout_height="32.0dip"                      android:background="@drawable/btn_capture_x"                      android:onClick="onBackPressed" />              </LinearLayout>                <LinearLayout                  android:layout_width="56.0dip"                  android:layout_height="fill_parent"                  android:layout_centerInParent="true"                  android:layout_centerVertical="true"                  android:gravity="center" >                    <!--                        TextView                      android:id="@id/press"                      android:layout_width="32.0dip"                      android:layout_height="32.0dip"                      android:background="@drawable/btn_capture_ghost">                  -->                    <Button                      android:id="@id/switchCamera"                      android:layout_width="32.dip"                      android:layout_height="32dip"                      android:background="@drawable/btn_capture_front_facing_camera"                      android:onClick="onCameraSwitchPressed" />              </LinearLayout>                <LinearLayout                  android:id="@id/finishLayOut"                  android:layout_width="56.0dip"                  android:layout_height="fill_parent"                  android:layout_alignParentRight="true"                  android:layout_centerVertical="true"                  android:gravity="center"                  android:onClick="onFinishPressed"                  android:visibility="visible" >                    <Button                      android:id="@id/finishButton"                      android:layout_width="32.0dip"                      android:layout_height="32.0dip"                      android:background="@drawable/btn_capture_arrow"                      android:onClick="onFinishPressed" />              </LinearLayout>            </RelativeLayout>            <cn.wodong.capturevideo.MySurfaceView              android:id="@id/cameraView"              android:layout_width="fill_parent"              android:layout_height="fill_parent"              android:layout_below="@id/top_mask"              android:layout_centerInParent="true" />            <VideoView              android:id="@id/mediaShow"              android:layout_width="fill_parent"              android:layout_height="fill_parent"              android:layout_below="@id/top_mask"              android:layout_centerInParent="true" />            <RelativeLayout              android:id="@id/bottom_mask"              android:layout_width="fill_parent"              android:layout_height="100.0dip"              android:layout_alignParentBottom="true"              android:layout_gravity="bottom"              android:background="@color/capture_background" >                <LinearLayout                  android:id="@id/camera_features"                  style="@style/CameraFeatureLayout"                  android:layout_width="fill_parent"                  android:layout_height="51.0dip"                  android:orientation="horizontal"                  android:paddingTop="9.0dip" >                    <Button                      android:layout_width="32.dip"                      android:layout_height="32dip"                      android:background="@drawable/btn_capture_front_facing_camera"                      android:onClick="onCameraSwitchPressed"                      android:visibility="invisible" />              </LinearLayout>          </RelativeLayout>      </RelativeLayout>    </RelativeLayout>

相机启动：

public void startCamera(SurfaceHolder holder) {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.GINGERBREAD) {
for (int i = 0; i < camera.getNumberOfCameras(); i++) {
CameraInfo info = new CameraInfo();
Camera.getCameraInfo(i, info);
if (info.facing == cameraFacingType) {
camera = Camera.open(i);
break;
}
}
} else {
camera = Camera.open();
}
Parameters parameters = camera.getParameters();
try {
List<Size> sizeList = parameters.getSupportedPreviewSizes();
int width = 0;
for (Size s : sizeList) {
System.out.println(s.width + "," + s.height);
if (s.width > width && s.width <= 800) {
width = s.width;
defaultSize = s;
}
}
camera.setDisplayOrientation(90);
camera.setPreviewDisplay(holder);
} catch (IOException e) {
camera.release();
camera = null;
}
try {
parameters.setPreviewSize(640, 480);
camera.setParameters(parameters);
defaultSize = null;
} catch (Exception e) {
e.printStackTrace();
parameters.setPreviewSize(defaultSize.width, defaultSize.height);
camera.setParameters(parameters);
}
}

进度条实现：

protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
if (this.shouldBeWidth > 0) {
canvas.drawRect(0.0F, 0.0F, this.shouldBeWidth,
getMeasuredHeight(), mPaint);
}
};

录制视频：

public void startRecord(boolean isFirst) {
if (isMax) {
return;
}
semp.acquireUninterruptibly();
getCamera().stopPreview();
mediaRecorder = new MediaRecorder();
cameraManager.getCamera().unlock();
mediaRecorder.setCamera(cameraManager.getCamera());
if (cameraManager.isUseBackCamera()) {
mediaRecorder.setOrientationHint(90);
} else {
mediaRecorder.setOrientationHint(90 + 180);
}
Size defaultSize = cameraManager.getDefaultSize();
mediaRecorder.setAudioSource(MediaRecorder.AudioSource.CAMCORDER);
mediaRecorder.setVideoSource(MediaRecorder.VideoSource.CAMERA);
mediaRecorder.setProfile(CamcorderProfile
.get(CameraProfile.QUALITY_HIGH));
if (defaultSize != null) {
mediaRecorder.setVideoSize(defaultSize.width, defaultSize.height);
} else {
mediaRecorder.setVideoSize(640, 480);
}
// camera.getParameters().setPictureSize(cameraSize.width,
// cameraSize.height);
// camera.setParameters(parameters);
String fileName = parentPath + "/" + videoTempFiles.size() + ".mp4";
mediaRecorder.setOutputFile(fileName);
videoTempFiles.add(fileName);
mediaRecorder.setPreviewDisplay(mySurfaceView.getHolder().getSurface());
try {
mediaRecorder.prepare();
} catch (Exception e) {
e.printStackTrace();
stopRecord();
}
try {
mediaRecorder.start();
isStart = true;
videoStartTime = new Date().getTime();
} catch (Exception e) {
e.printStackTrace();
if (isFirst) {
startRecord(false);
} else {
stopRecord();
}
}
}

每次录制生成一个小的视频文件，最后要把所有的视频文件进行合并，合并成一个整体的视频文件。采用了一个开源组件isoviewer实现此功能

private void combineFiles() {
try {
List<Track> videoTracks = new LinkedList<Track>();
List<Track> audioTracks = new LinkedList<Track>();
for (String fileName : recorderManager.getVideoTempFiles()) {
try {
Movie movie = MovieCreator.build(fileName);
for (Track t : movie.getTracks()) {
if (t.getHandler().equals("soun")) {
audioTracks.add(t);
}
if (t.getHandler().equals("vide")) {
videoTracks.add(t);
}
}
} catch (Exception e) {
e.printStackTrace();
}
}
Movie result = new Movie();
if (audioTracks.size() > 0) {
result.addTrack(new AppendTrack(audioTracks
.toArray(new Track[audioTracks.size()])));
}
if (videoTracks.size() > 0) {
result.addTrack(new AppendTrack(videoTracks
.toArray(new Track[videoTracks.size()])));
}
Container out = new DefaultMp4Builder().build(result);
FileChannel fc = new RandomAccessFile(
String.format(getFinalVideoFileName()), "rw").getChannel();
out.writeContainer(fc);
fc.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}

视频播放采用VideoView：

public void startPlay() {
combineFiles();
recorderManager.reset();
videoSurface.setVisibility(SurfaceView.GONE);
videoView.setVisibility(SurfaceView.VISIBLE);
videoView.setVideoPath(getFinalVideoFileName());
videoView.start();
}

效果图：

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