本篇文章给大家分享的是有关Android中怎么实现屏幕录制功能，小编觉得挺实用的，因此分享给大家学习，希望大家阅读完这篇文章后可以有所收获，话不多说，跟着小编一起来看看吧。

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添加依赖

dependencies { implementation fileTree(dir: 'libs', include: ['*.jar']) implementation"org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version" implementation 'androidx.appcompat:appcompat:1.1.0' implementation 'androidx.core:core-ktx:1.0.2' implementation 'androidx.constraintlayout:constraintlayout:1.1.3' testImplementation 'junit:junit:4.12' androidTestImplementation 'androidx.test.ext:junit:1.1.1' androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0' api 'com.blankj:utilcode:1.24.4'}repositories { mavenCentral()}

3.注册权限：

4.主界面，

test.aac是录屏的时候配的音乐，可以随便找另外一个放到assets文件夹里面进行替换

package com.ufi.pdioms.ztkotlin  import android.content.Intentimport android.content.res.AssetFileDescriptorimport android.media.MediaPlayerimport android.os.Buildimport androidx.appcompat.app.AppCompatActivityimport android.os.Bundleimport android.util.Logimport android.widget.Toastimport com.blankj.utilcode.util.PathUtilsimport kotlinx.android.synthetic.main.activity_main.* class MainActivity : AppCompatActivity() { // https://github.com/fanqilongmoli/AndroidScreenRecord private var screenRecordHelper: ScreenRecordHelper? = null private val afdd:AssetFileDescriptor by lazy { assets.openFd("test.aac") }  override fun onCreate(savedInstanceState: Bundle?) {  super.onCreate(savedInstanceState)  setContentView(R.layout.activity_main)   btnStart.setOnClickListener {   if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {    if (screenRecordHelper == null) {     screenRecordHelper = ScreenRecordHelper(this, object : ScreenRecordHelper.OnVideoRecordListener {      override fun onBeforeRecord() {      }       override fun onStartRecord() {       play()      }       override fun onCancelRecord() {       releasePlayer()      }       override fun onEndRecord() {       releasePlayer()      }      }, PathUtils.getExternalStoragePath() + "/fanqilong")    }    screenRecordHelper?.apply {     if (!isRecording) {      // 如果你想录制音频（一定会有环境音量），你可以打开下面这个限制,并且使用不带参数的 stopRecord()//      recordAudio = true      startRecord()     }    }   } else {    Toast.makeText(this@MainActivity.applicationContext, "sorry,your phone does not support recording screen", Toast.LENGTH_LONG).show()   }  }   btnStop.setOnClickListener {   if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {    screenRecordHelper?.apply {     if (isRecording) {      if (mediaPlayer != null) {       // 如果选择带参数的 stop 方法，则录制音频无效       stopRecord(mediaPlayer!!.duration.toLong(), 15 * 1000, afdd)      } else {       stopRecord()      }     }    }   }  } }  private fun play() {  mediaPlayer = MediaPlayer()  try {   mediaPlayer?.apply {    this.reset()    this.setDataSource(afdd.fileDescriptor, afdd.startOffset, afdd.length)    this.isLooping = true    this.prepare()    this.start()   }  } catch (e: Exception) {   Log.d("fanqilong", "播放音乐失败")  } finally {   } }  // 音频播放 private var mediaPlayer: MediaPlayer? = null  private fun releasePlayer() {  mediaPlayer?.apply {   stop()   release()  }  mediaPlayer = null }  override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {  super.onActivityResult(requestCode, resultCode, data)  if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP && data != null) {   screenRecordHelper?.onActivityResult(requestCode, resultCode, data)  } }  override fun onDestroy() {  if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {   screenRecordHelper?.clearAll()  }  afdd.close()  super.onDestroy() }}

5.录屏代码

package com.ufi.pdioms.ztkotlin import android.app.Activityimport android.content.Contextimport android.content.Intentimport android.content.pm.PackageManagerimport android.content.res.AssetFileDescriptorimport android.hardware.display.DisplayManagerimport android.hardware.display.VirtualDisplayimport android.media.*import android.media.projection.MediaProjectionimport android.media.projection.MediaProjectionManagerimport android.net.Uriimport android.os.Buildimport android.os.Environmentimport android.os.Handlerimport android.util.DisplayMetricsimport android.util.Logimport android.widget.Toastimport androidx.annotation.RequiresApiimport com.blankj.utilcode.constant.PermissionConstantsimport com.blankj.utilcode.util.PermissionUtilsimport java.io.Fileimport java.lang.Exceptionimport java.nio.ByteBuffer @RequiresApi(Build.VERSION_CODES.LOLLIPOP)class ScreenRecordHelper @JvmOverloads constructor( private var activity: Activity, private val listener: OnVideoRecordListener?, private var savePath: String = Environment.getExternalStorageDirectory().absolutePath + File.separator   + "DCIM" + File.separator + "Camera", private val saveName: String = "record_${System.currentTimeMillis()}") {  private val mediaProjectionManager by lazy { activity.getSystemService(Context.MEDIA_PROJECTION_SERVICE) as? MediaProjectionManager } private var mediaRecorder: MediaRecorder? = null private var mediaProjection: MediaProjection? = null private var virtualDisplay: VirtualDisplay? = null private val displayMetrics by lazy { DisplayMetrics() } private var saveFile: File? = null var isRecording = false var recordAudio = false  init {  activity.windowManager.defaultDisplay.getMetrics(displayMetrics) }  companion object {  private const val VIDEO_FRAME_RATE = 30  private const val REQUEST_CODE = 1024  private const val TAG = "ScreenRecordHelper" }  fun startRecord() {  if (mediaProjectionManager == null) {   Log.d(TAG, "mediaProjectionManager == null，当前手机暂不支持录屏")   showToast(R.string.phone_not_support_screen_record)   return  }   PermissionUtils.permission(PermissionConstants.STORAGE, PermissionConstants.MICROPHONE)   .callback(object : PermissionUtils.SimpleCallback {    override fun onGranted() {     mediaProjectionManager?.apply {      listener?.onBeforeRecord()      val intent = this.createScreenCaptureIntent()      if (activity.packageManager.resolveActivity(        intent,        PackageManager.MATCH_DEFAULT_ONLY       ) != null      ) {       activity.startActivityForResult(intent, REQUEST_CODE)      } else {       showToast(R.string.phone_not_support_screen_record)      }     }    }     override fun onDenied() {     showToast(R.string.permission_denied)    }    }).request() }  @RequiresApi(Build.VERSION_CODES.N) fun resume() {  mediaRecorder?.resume() }  @RequiresApi(Build.VERSION_CODES.N) fun pause() {  mediaRecorder?.pause() }  fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent) {  if (requestCode == REQUEST_CODE) {   if (resultCode == Activity.RESULT_OK) {    mediaProjection = mediaProjectionManager!!.getMediaProjection(resultCode, data)     // 部分手机录制视频的时候 会出现弹框    Handler().postDelayed({     if (initRecorder()) {      isRecording = true      mediaRecorder?.start()      listener?.onStartRecord()     } else {      showToast(R.string.phone_not_support_screen_record)     }    }, 150)   } else {    showToast(R.string.phone_not_support_screen_record)   }  } }  fun cancelRecord(){  stopRecord()  saveFile?.delete()  saveFile = null  listener?.onCancelRecord() }   fun stopRecord(videoDuration: Long = 0, audioDuration: Long = 0, afdd: AssetFileDescriptor? = null){  stop()  if (audioDuration != 0L && afdd != null) {   syntheticAudio(videoDuration, audioDuration, afdd)  } else {   // saveFile   if (saveFile != null) {    val newFile = File(savePath, "$saveName.mp4")    // 录制结束后修改后缀为 mp4    saveFile!!.renameTo(newFile)    refreshVideo(newFile)   }   saveFile = null  } }   private fun refreshVideo(newFile: File) {  Log.d(TAG, "screen record end,file length:${newFile.length()}.")  if (newFile.length() > 5000) {   val intent = Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE)   intent.data = Uri.fromFile(newFile)   activity.sendBroadcast(intent)   Log.e("TAG","refreshVideo: "+savePath)   showToast(R.string.save_to_album_success)  } else {   newFile.delete()   showToast(R.string.phone_not_support_screen_record)   Log.d(TAG, activity.getString(R.string.record_faild))  } }  private fun stop() {  if (isRecording) {   isRecording = false   try {    mediaRecorder?.apply {     setOnErrorListener(null)     setOnInfoListener(null)     setPreviewDisplay(null)     stop()     Log.d(TAG, "stop success")    }   } catch (e: Exception) {    Log.e(TAG, "stopRecorder() error！${e.message}")   } finally {    mediaRecorder?.reset()    virtualDisplay?.release()    mediaProjection?.stop()    listener?.onEndRecord()   }    } }  private fun initRecorder(): Boolean {  var result = true  val f = File(savePath)  if (!f.exists()) {   f.mkdir()  }  saveFile = File(savePath, "$saveName.tmp")  saveFile?.apply {   if (exists()) {    delete()   }  }  mediaRecorder = MediaRecorder()  val width = Math.min(displayMetrics.widthPixels, 1080)  val height = Math.min(displayMetrics.heightPixels, 1920)  mediaRecorder?.apply {   if (recordAudio) {    setAudioSource(MediaRecorder.AudioSource.MIC)   }   setVideoSource(MediaRecorder.VideoSource.SURFACE)   setOutputFormat(MediaRecorder.OutputFormat.MPEG_4)   setVideoEncoder(MediaRecorder.VideoEncoder.H264)   if (recordAudio) {    setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB)   }   setOutputFile(saveFile!!.absolutePath)   setVideoSize(width, height)   setVideoEncodingBitRate(8388608)   setVideoFrameRate(VIDEO_FRAME_RATE)    try {     prepare()    virtualDisplay = mediaProjection?.createVirtualDisplay(     "MainScreen", width, height, displayMetrics.densityDpi,     DisplayManager.VIRTUAL_DISPLAY_FLAG_AUTO_MIRROR, surface, null, null    )    Log.d(TAG, "initRecorder 成功")   } catch (e: Exception) {    Log.e(TAG, "IllegalStateException preparing MediaRecorder: ${e.message}")    e.printStackTrace()    result = false   }  }   return result }   private fun showToast(resId: Int) {  Toast.makeText(activity.applicationContext, activity.applicationContext.getString(resId), Toast.LENGTH_SHORT)   .show() }  fun clearAll() {  mediaRecorder?.release()  mediaRecorder = null  virtualDisplay?.release()  virtualDisplay = null  mediaProjection?.stop()  mediaProjection = null }  /**  * https://stackoverflow.com/questions/31572067/android-how-to-mux-audio-file-and-video-file  */ private fun syntheticAudio(audioDuration: Long, videoDuration: Long, afdd: AssetFileDescriptor) {  Log.d(TAG, "start syntheticAudio")  val newFile = File(savePath, "$saveName.mp4")  if (newFile.exists()) {   newFile.delete()  }  try {   newFile.createNewFile()   val videoExtractor = MediaExtractor()   videoExtractor.setDataSource(saveFile!!.absolutePath)   val audioExtractor = MediaExtractor()   afdd.apply {    audioExtractor.setDataSource(fileDescriptor, startOffset, length * videoDuration / audioDuration)   }   val muxer = MediaMuxer(newFile.absolutePath, MediaMuxer.OutputFormat.MUXER_OUTPUT_MPEG_4)   videoExtractor.selectTrack(0)   val videoFormat = videoExtractor.getTrackFormat(0)   val videoTrack = muxer.addTrack(videoFormat)    audioExtractor.selectTrack(0)   val audioFormat = audioExtractor.getTrackFormat(0)   val audioTrack = muxer.addTrack(audioFormat)    var sawEOS = false   var frameCount = 0   val offset = 100   val sampleSize = 1000 * 1024   val videoBuf = ByteBuffer.allocate(sampleSize)   val audioBuf = ByteBuffer.allocate(sampleSize)   val videoBufferInfo = MediaCodec.BufferInfo()   val audioBufferInfo = MediaCodec.BufferInfo()    videoExtractor.seekTo(0, MediaExtractor.SEEK_TO_CLOSEST_SYNC)   audioExtractor.seekTo(0, MediaExtractor.SEEK_TO_CLOSEST_SYNC)    muxer.start()    // 每秒多少帧   // 实测 OPPO R9em 垃圾手机，拿出来的没有 MediaFormat.KEY_FRAME_RATE   val frameRate = if (videoFormat.containsKey(MediaFormat.KEY_FRAME_RATE)) {    videoFormat.getInteger(MediaFormat.KEY_FRAME_RATE)   } else {    31   }   // 得出平均每一帧间隔多少微妙   val videoSampleTime = 1000 * 1000 / frameRate   while (!sawEOS) {    videoBufferInfo.offset = offset    videoBufferInfo.size = videoExtractor.readSampleData(videoBuf, offset)    if (videoBufferInfo.size < 0) {     sawEOS = true     videoBufferInfo.size = 0    } else {     videoBufferInfo.presentationTimeUs += videoSampleTime     videoBufferInfo.flags = videoExtractor.sampleFlags     muxer.writeSampleData(videoTrack, videoBuf, videoBufferInfo)     videoExtractor.advance()     frameCount++    }   }   var sawEOS2 = false   var frameCount2 = 0   while (!sawEOS2) {    frameCount2++    audioBufferInfo.offset = offset    audioBufferInfo.size = audioExtractor.readSampleData(audioBuf, offset)     if (audioBufferInfo.size < 0) {     sawEOS2 = true     audioBufferInfo.size = 0    } else {     audioBufferInfo.presentationTimeUs = audioExtractor.sampleTime     audioBufferInfo.flags = audioExtractor.sampleFlags     muxer.writeSampleData(audioTrack, audioBuf, audioBufferInfo)     audioExtractor.advance()    }   }   muxer.stop()   muxer.release()   videoExtractor.release()   audioExtractor.release()    // 删除无声视频文件   saveFile?.delete()  } catch (e: Exception) {   Log.e(TAG, "Mixer Error:${e.message}")   // 视频添加音频合成失败，直接保存视频   saveFile?.renameTo(newFile)   } finally {   afdd.close()   Handler().post {    refreshVideo(newFile)    saveFile = null   }  } }   interface OnVideoRecordListener {   /**   * 录制开始时隐藏不必要的UI   */  fun onBeforeRecord()   /**   * 开始录制   */  fun onStartRecord()   /**   * 取消录制   */  fun onCancelRecord()   /**   * 结束录制   */  fun onEndRecord() }}

6.布局

     

以上就是Android中怎么实现屏幕录制功能，小编相信有部分知识点可能是我们日常工作会见到或用到的。希望你能通过这篇文章学到更多知识。更多详情敬请关注创新互联行业资讯频道。

本文题目：Android中怎么实现屏幕录制功能
文章出自：http://chengdu.cdxwcx.cn/article/jighgs.html