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。
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