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这篇文章主要介绍Android5.0以上版本如何实现录屏，文中介绍的非常详细，具有一定的参考价值，感兴趣的小伙伴们一定要看完！
1既然是录制视频，我们应该有一个按钮控制开始和结束。
2在录制之前，需要先判断一下Android系统的版本是否大于5.0，并且动态申请一下权限（读写，录音，照相机），这一步可以在点开始按钮的时候执行
if (ContextCompat.checkSelfPermission(context, Manifest.permission.WRITE_EXTERNAL_STORAGE)
!= PackageManager.PERMISSION_GRANTED) {
ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE}, 102);
}
if (ContextCompat.checkSelfPermission(context, Manifest.permission.RECORD_AUDIO)
!= PackageManager.PERMISSION_GRANTED) {
ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.RECORD_AUDIO}, 103);
}
if (ContextCompat.checkSelfPermission(context, Manifest.permission.CAMERA)
!= PackageManager.PERMISSION_GRANTED) {
ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.RECORD_AUDIO}, 104);
}
Intent intent = null;
if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.LOLLIPOP) {
intent = mediaProjectionManager.createScreenCaptureIntent();
startActivityForResult(intent, 101);//正常情况是要执行到这里的,作用是申请捕捉屏幕
} else {
ShowUtil.showToast(context, "Android版本太低，无法使用该功能");
}3定义MediaProjection和MediaProjectionManager等一些其他必要的变量
boolean isrun = false;//用来标记录屏的状态private MediaProjectionManager mediaProjectionManager; private MediaProjection mediaProjection;//录制视频的工具private int width, height, dpi;//屏幕宽高和dpi，后面会用到 private ScreenRecorder screenRecorder;//这个是自己写的录视频的工具类，下文会放完整的代码 Thread thread;//录视频要放在线程里去执行
在onCreat里写好实例化
mediaProjectionManager = (MediaProjectionManager) context.getSystemService(MEDIA_PROJECTION_SERVICE); WindowManager manager = this.getWindowManager(); DisplayMetrics outMetrics = new DisplayMetrics(); manager.getDefaultDisplay().getMetrics(outMetrics); width = outMetrics.widthPixels; height = outMetrics.heightPixels; dpi = outMetrics.densityDpi;
4我们在onActivityResult回调方法中，来处理返回的事件
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == 102) {
Toast.makeText(context, "缺少读写权限", Toast.LENGTH_SHORT).show();
return;
}
if (requestCode == 103) {
Toast.makeText(context, "缺少录音权限", Toast.LENGTH_SHORT).show();
return;
}
if (requestCode == 104) {
Toast.makeText(context, "缺少相机权限", Toast.LENGTH_SHORT).show();
return;
}
if (requestCode != 101) {
Log.e("HandDrawActivity", "error requestCode =" + requestCode);
}
if (resultCode != RESULT_OK) {
Toast.makeText(context, "捕捉屏幕被禁止", Toast.LENGTH_SHORT).show();
return;
}
mediaProjection = mediaProjectionManager.getMediaProjection(resultCode, data);
if (mediaProjection != null) {
screenRecorder = new ScreenRecorder(width, height, mediaProjection, dpi);
}
thread = new Thread() {
@Override
public void run() {
screenRecorder.startRecorder();//跟ScreenRecorder有关的下文再说，总之这句话的意思就是开始录屏的意思
}
};
thread.start();
binding.startPlayer.setText("停止");//开始和停止我用的同一个按钮，所以开始录屏之后把按钮文字改一下
isrun = true;//录屏状态改成真
}5先放上ScreenRecorder代码，只想要结果的朋友呢，直接把类粘贴走，把报错的地方改一改（在我自己的项目里可是不报错的）,就实现了录制屏幕的功能了，还想看看的，可以往下看看
import android.hardware.display.DisplayManager;
import android.media.MediaCodec;
import android.media.MediaCodecInfo;
import android.media.MediaFormat;
import android.media.MediaMuxer;
import android.media.MediaRecorder;
import android.media.projection.MediaProjection;
import android.os.Build;
import android.os.Environment;
import android.text.TextUtils;
import android.util.Log;
import android.view.Surface;
import com.coremedia.iso.boxes.Container;
import com.googlecode.mp4parser.authoring.Movie;
import com.googlecode.mp4parser.authoring.Track;
import com.googlecode.mp4parser.authoring.builder.DefaultMp4Builder;
import com.googlecode.mp4parser.authoring.container.mp4.MovieCreator;
import com.googlecode.mp4parser.authoring.tracks.AppendTrack;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.RandomAccessFile;
import java.nio.ByteBuffer;
import java.nio.channels.FileChannel;
import java.util.ArrayList;
import java.util.LinkedList;
import java.util.List;
public class ScreenRecorder {
private int mWidth, mHeight, mDensty;
private MediaProjection mediaProjection;
private MediaCodec.BufferInfo mBufferInfo;
private MediaCodec mEncorder;
private Surface mInputSurface;
private MediaMuxer mMuxer;
private boolean isQuit = false;
private boolean mMuxerStarted = false;
private int mTrackIndex;
private String path = Environment.getExternalStorageDirectory().getAbsolutePath() + "/cache";
private MediaRecorder mediaRecorder;
public ScreenRecorder(int mWidth, int mHeight, MediaProjection mediaProjection, int mDensty) {
this.mWidth = mWidth;
this.mHeight = mHeight;
this.mediaProjection = mediaProjection;
this.mDensty = mDensty;
File file = new File(path);
if (!file.exists()) {
file.mkdirs();
}
}
public void startRecorder() {
prepareRecorder();
startLuYin();
startRecording();
}
public void stop() {
isQuit = true;
releaseEncorders(1);
List<String> filePath = new ArrayList<>();
filePath.add(path + "/APlanyinpin.amr");
filePath.add(path + "/APlanshipin.mp4");
joinVideo(filePath, path);
}
public void destory() {
releaseEncorders(0);
}
private void startLuYin() {
File file = new File(path, "APlanyinpin.amr");
mediaRecorder = new MediaRecorder();
mediaRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
mediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.DEFAULT);
mediaRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.DEFAULT);
mediaRecorder.setOutputFile(file.getAbsolutePath());
try {
mediaRecorder.prepare();
mediaRecorder.start();
Log.e("HandDrawActivity", "已经开始录音");
} catch (IOException e) {
e.printStackTrace();
}
}
private void prepareRecorder() {
mBufferInfo = new MediaCodec.BufferInfo(); //元数据，描述bytebuffer的数据，尺寸，偏移
//创建格式化对象 MIMI_TYPE 传入的 video/avc 是H264编码格式
MediaFormat format = MediaFormat.createVideoFormat("video/avc", mWidth, mHeight);
int frameRate = 45;
format.setInteger(MediaFormat.KEY_BIT_RATE, 3000000);
format.setInteger(MediaFormat.KEY_COLOR_FORMAT, MediaCodecInfo.CodecCapabilities.COLOR_FormatSurface);
format.setInteger(MediaFormat.KEY_I_FRAME_INTERVAL, 10);
format.setInteger(MediaFormat.KEY_FRAME_RATE, frameRate);
format.setInteger(MediaFormat.KEY_CHANNEL_COUNT, 1);
format.setInteger(MediaFormat.KEY_CAPTURE_RATE, frameRate);
format.setInteger(MediaFormat.KEY_REPEAT_PREVIOUS_FRAME_AFTER, 1000000 / frameRate);
try {
mEncorder = MediaCodec.createEncoderByType("video/avc");
mEncorder.configure(format, null, null, MediaCodec.CONFIGURE_FLAG_ENCODE);
mInputSurface = mEncorder.createInputSurface();
mEncorder.start();
} catch (IOException e) {
e.printStackTrace();
releaseEncorders(0);
}
}
private void startRecording() {
File saveFile = new File(path, "APlanshipin.mp4");
try {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
mMuxer = new MediaMuxer(saveFile.getAbsolutePath(), MediaMuxer.OutputFormat.MUXER_OUTPUT_MPEG_4);
mediaProjection.createVirtualDisplay("SCREENRECORDER", mWidth, mHeight, mDensty, DisplayManager.VIRTUAL_DISPLAY_FLAG_PUBLIC,
mInputSurface, null, null);
drainEncoder();
}
} catch (Exception e) {
e.printStackTrace();
}
}
private void drainEncoder() {
while (!isQuit) {
Log.e("TAG", "drain.....");
int bufferIndex = mEncorder.dequeueOutputBuffer(mBufferInfo, 0);
if (bufferIndex == MediaCodec.INFO_TRY_AGAIN_LATER) {
try {
Thread.sleep(10);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
if (bufferIndex == MediaCodec.INFO_OUTPUT_FORMAT_CHANGED) {
mTrackIndex = mMuxer.addTrack(mEncorder.getOutputFormat());
if (!mMuxerStarted && mTrackIndex >= 0) {
mMuxer.start();
mMuxerStarted = true;
Log.e("HandDrawActivity", "已经开始录屏");
}
}
if (bufferIndex >= 0) {
Log.e("TAG", "drain...write..");
ByteBuffer bufferData = mEncorder.getOutputBuffer(bufferIndex);
if ((mBufferInfo.flags & MediaCodec.BUFFER_FLAG_CODEC_CONFIG) != 0) {
mBufferInfo.size = 0;
}
if (mBufferInfo.size != 0) {
if (mMuxerStarted) {
bufferData.position(mBufferInfo.offset);
bufferData.limit(mBufferInfo.offset + mBufferInfo.size);
mMuxer.writeSampleData(mTrackIndex, bufferData, mBufferInfo);
}
}
mEncorder.releaseOutputBuffer(bufferIndex, false);
if ((mBufferInfo.flags & MediaCodec.BUFFER_FLAG_END_OF_STREAM) != 0) {
break;
}
}
}
Log.e("HandDrawActivity", "已经结束录屏");
}
private void releaseEncorders(int i) {
if (mediaProjection != null) {
mediaProjection.stop();
}
mBufferInfo = null;
if (mEncorder != null) {
mEncorder.stop();
}
mInputSurface = null;
if (mMuxer != null && i == 1) {
mMuxer.stop();
}
if (mediaRecorder != null) {
mediaRecorder.stop();
mediaRecorder.reset();
mediaRecorder.release();
}
}
private boolean joinVideo(List<String> filePaths, String resultPath) {
Log.e("HandDrawActivity", "准备合成中");
boolean result = false;
if (filePaths == null || filePaths.size() <= 0 || TextUtils.isEmpty(resultPath)) {
throw new IllegalArgumentException();
}
if (filePaths.size() == 1) { // 只有一个视频片段，不需要合并
return true;
}
try {
Movie[] inMovies = new Movie[filePaths.size()];
for (int i = 0; i < filePaths.size(); i++) {
Log.e("HandDrawActivity", "filePaths=" + filePaths.get(i));
File f = new File(filePaths.get(i));
if (f.exists()) {
inMovies[i] = MovieCreator.build(filePaths.get(i));
}
}
// 分别取出音轨和视频
List<Track> videoTracks = new LinkedList<>();
List<Track> audioTracks = new LinkedList<>();
for (Movie m : inMovies) {
for (Track t : m.getTracks()) {
if (t.getHandler().equals("soun")) {
audioTracks.add(t);
}
if (t.getHandler().equals("vide")) {
videoTracks.add(t);
}
}
}
// 合并到最终的视频文件
Movie outMovie = new Movie();
if (audioTracks.size() > 0) {
outMovie.addTrack(new AppendTrack(audioTracks.toArray(new Track[audioTracks.size()])));
}
if (videoTracks.size() > 0) {
outMovie.addTrack(new AppendTrack(videoTracks.toArray(new Track[videoTracks.size()])));
}
Container mp4file = new DefaultMp4Builder().build(outMovie);
// 将文件输出
File resultFile = new File(resultPath, "APlanTeacherAnswer.mp4");
if (resultFile.exists() && resultFile.isFile()) {
resultFile.delete();
}
FileChannel fc = new RandomAccessFile(resultFile, "rw").getChannel();
mp4file.writeContainer(fc);
fc.close();
Log.e("HandDrawActivity", "合成完毕");
// 合成完成后把原片段文件删除
for (String filePath : filePaths) {
File file = new File(filePath);
file.delete();
}
result = true;
HandDrawActivity.sendVideo();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (Exception e) {
e.printStackTrace();
}
return result;
}
}6从startRecorder方法说起
public void startRecorder() {
prepareRecorder();//录视频前的准备
startLuYin();//直接录音频(不用准备)
startRecording();//录视频
}录音的方法
private void startLuYin() {
File file = new File(path, "APlanyinpin.amr");
mediaRecorder = new MediaRecorder();
mediaRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);//声音来源，麦克
mediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.DEFAULT);//音频格式，默认，其实就是上面定义好的amr了，除此之外还有mp4
mediaRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.DEFAULT);//编码格式，问题是我不知道编码格式对什么有影响，是音质高低还是文件大小还是解析快慢，等我有时间去专门研究一下
mediaRecorder.setOutputFile(file.getAbsolutePath());
try {
mediaRecorder.prepare();
mediaRecorder.start();
Log.e("HandDrawActivity", "已经开始录音");
} catch (IOException e) {
e.printStackTrace();
}
}//录视频前的准备工作
private void prepareRecorder() {
mBufferInfo = new MediaCodec.BufferInfo(); //元数据，描述bytebuffer的数据，尺寸，偏移
//创建格式化对象 MIMI_TYPE 传入的 video/avc 是H264编码格式
MediaFormat format = MediaFormat.createVideoFormat("video/avc", mWidth, mHeight);
int frameRate = 45;
format.setInteger(MediaFormat.KEY_BIT_RATE, 3000000);
format.setInteger(MediaFormat.KEY_COLOR_FORMAT, MediaCodecInfo.CodecCapabilities.COLOR_FormatSurface);
format.setInteger(MediaFormat.KEY_I_FRAME_INTERVAL, 10);
format.setInteger(MediaFormat.KEY_FRAME_RATE, frameRate);
format.setInteger(MediaFormat.KEY_CHANNEL_COUNT, 1);
format.setInteger(MediaFormat.KEY_CAPTURE_RATE, frameRate);
format.setInteger(MediaFormat.KEY_REPEAT_PREVIOUS_FRAME_AFTER, 1000000 / frameRate);//编码器的设置，具体是设置的啥我也不太清楚，但是网上查一查都是这么写的！！！
try {
mEncorder = MediaCodec.createEncoderByType("video/avc");
mEncorder.configure(format, null, null, MediaCodec.CONFIGURE_FLAG_ENCODE);
mInputSurface = mEncorder.createInputSurface();
mEncorder.start();//让编码器先跑起来
} catch (IOException e) {
e.printStackTrace();
releaseEncorders(0);
}
}这里也是准备工作
private void startRecording() {
File saveFile = new File(path, "APlanshipin.mp4");
try {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
mMuxer = new MediaMuxer(saveFile.getAbsolutePath(), MediaMuxer.OutputFormat.MUXER_OUTPUT_MPEG_4);//百度一下MediaMuxer,讲的很详细的
mediaProjection.createVirtualDisplay("SCREENRECORDER", mWidth, mHeight, mDensty, DisplayManager.VIRTUAL_DISPLAY_FLAG_PUBLIC,
mInputSurface, null, null);
drainEncoder();
}
} catch (Exception e) {
e.printStackTrace();
}
}这个就是开始写视频文件了
private void drainEncoder() {
while (!isQuit) {
Log.e("TAG", "drain.....");
int bufferIndex = mEncorder.dequeueOutputBuffer(mBufferInfo, 0);
if (bufferIndex == MediaCodec.INFO_TRY_AGAIN_LATER) {
try {
Thread.sleep(10);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
if (bufferIndex == MediaCodec.INFO_OUTPUT_FORMAT_CHANGED) {
mTrackIndex = mMuxer.addTrack(mEncorder.getOutputFormat());
if (!mMuxerStarted && mTrackIndex >= 0) {
mMuxer.start();
mMuxerStarted = true;
Log.e("HandDrawActivity", "已经开始录屏");
}
}
if (bufferIndex >= 0) {
Log.e("TAG", "drain...write..");
ByteBuffer bufferData = mEncorder.getOutputBuffer(bufferIndex);
if ((mBufferInfo.flags & MediaCodec.BUFFER_FLAG_CODEC_CONFIG) != 0) {
mBufferInfo.size = 0;
}
if (mBufferInfo.size != 0) {
if (mMuxerStarted) {
bufferData.position(mBufferInfo.offset);
bufferData.limit(mBufferInfo.offset + mBufferInfo.size);
mMuxer.writeSampleData(mTrackIndex, bufferData, mBufferInfo);
}
}
mEncorder.releaseOutputBuffer(bufferIndex, false);
if ((mBufferInfo.flags & MediaCodec.BUFFER_FLAG_END_OF_STREAM) != 0) {
break;
}
}
}
Log.e("HandDrawActivity", "已经结束录屏");
}这个就是把录好的音频和视频合并成mp4的方法了，也是点击停止录屏的时候用到的
private boolean joinVideo(List<String> filePaths, String resultPath) {
Log.e("HandDrawActivity", "准备合成中");
boolean result = false;
if (filePaths == null || filePaths.size() <= 0 || TextUtils.isEmpty(resultPath)) {
throw new IllegalArgumentException();
}
if (filePaths.size() == 1) { // 只有一个视频片段，不需要合并
return true;
}
try {
Movie[] inMovies = new Movie[filePaths.size()];
for (int i = 0; i < filePaths.size(); i++) {
Log.e("HandDrawActivity", "filePaths=" + filePaths.get(i));
File f = new File(filePaths.get(i));
if (f.exists()) {
inMovies[i] = MovieCreator.build(filePaths.get(i));
}
}
// 分别取出音轨和视频
List<Track> videoTracks = new LinkedList<>();
List<Track> audioTracks = new LinkedList<>();
for (Movie m : inMovies) {
for (Track t : m.getTracks()) {
if (t.getHandler().equals("soun")) {
audioTracks.add(t);
}
if (t.getHandler().equals("vide")) {
videoTracks.add(t);
}
}
}
// 合并到最终的视频文件
Movie outMovie = new Movie();
if (audioTracks.size() > 0) {
outMovie.addTrack(new AppendTrack(audioTracks.toArray(new Track[audioTracks.size()])));
}
if (videoTracks.size() > 0) {
outMovie.addTrack(new AppendTrack(videoTracks.toArray(new Track[videoTracks.size()])));
}
Container mp4file = new DefaultMp4Builder().build(outMovie);
// 将文件输出
File resultFile = new File(resultPath, "APlanTeacherAnswer.mp4");
if (resultFile.exists() && resultFile.isFile()) {
resultFile.delete();
}
FileChannel fc = new RandomAccessFile(resultFile, "rw").getChannel();
mp4file.writeContainer(fc);
fc.close();
Log.e("HandDrawActivity", "合成完毕");
// 合成完成后把原片段文件删除
for (String filePath : filePaths) {
File file = new File(filePath);
file.delete();
}
result = true;
HandDrawActivity.sendVideo();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (Exception e) {
e.printStackTrace();
}
return result;
}这个就是结束的时候了，该清空的清空，该注销的注销， i是用来判断录没录的，有可能刚进入这个页面都没录过，直接就返回到别的页面了，那就有可能空指针异常，因为有些变量都没初始化，所以用i判断一下，也可以自己写别的方法判端
private void releaseEncorders(int i) {
if (mediaProjection != null) {
mediaProjection.stop();
}
mBufferInfo = null;
if (mEncorder != null) {
mEncorder.stop();
}
mInputSurface = null;
if (mMuxer != null && i == 1) {
mMuxer.stop();
}
if (mediaRecorder != null) {
mediaRecorder.stop();
mediaRecorder.reset();
mediaRecorder.release();
}
}以上是“Android5.0以上版本如何实现录屏”这篇文章的所有内容，感谢各位的阅读！希望分享的内容对大家有帮助，更多相关知识，欢迎关注亿速云行业资讯频道！
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