Android 实现屏幕录制

添加权限和服务声明

<uses-permission android:name="android.permission.FOREGROUND_SERVICE" />
<serviceandroid:name=".ScreenService"android:enabled="true"android:exported="true"android:foregroundServiceType="mediaProjection"></service>

创建屏幕录制的 Service

import android.app.*
import android.content.Context
import android.content.Intent
import android.graphics.BitmapFactory
import android.hardware.display.DisplayManager
import android.hardware.display.VirtualDisplay
import android.media.CamcorderProfile
import android.media.MediaRecorder
import android.media.projection.MediaProjection
import android.media.projection.MediaProjectionManager
import android.os.Build
import android.os.IBinder
import android.util.DisplayMetrics
import android.util.Log
import android.view.WindowManager
import androidx.core.app.NotificationCompat
import java.io.IOExceptionclass ScreenService : Service() {private var mContext:Context?=nullprivate var projectionManager:MediaProjectionManager?=nullprivate var mMediaProjection:MediaProjection?=nulloverride fun onBind(intent: Intent): IBinder {TODO("Return the communication channel to the service.")}override fun onStartCommand(intent: Intent?, flags: Int, startId: Int): Int {mContext = thisvar resultCode = intent?.getIntExtra("resultCode", -1)var path = intent?.getStringExtra("path")var resultData: Intent? = intent?.getParcelableExtra("data")startNotification();projectionManager = getSystemService(MEDIA_PROJECTION_SERVICE) as MediaProjectionManagermMediaProjection = resultCode?.let { resultData?.let { it1 -> projectionManager?.getMediaProjection(it, it1) } }path?.let { startRecording(it) }return super.onStartCommand(intent, flags, startId)}private var NOTIFICATION_CHANNEL_ID="id";private var NOTIFICATION_CHANNEL_NAME="channel";private var NOTIFICATION_CHANNEL_DESC="desc";private fun startNotification() {if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {var notificationIntent = Intent(mContext, ScreenService::class.java)var pendingIntent: PendingIntent?=nullpendingIntent = if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.S) {PendingIntent.getActivity(this, 0, notificationIntent, PendingIntent.FLAG_IMMUTABLE);} else {PendingIntent.getActivity(this, 0, notificationIntent, PendingIntent.FLAG_ONE_SHOT);}var  notificationBuilder = mContext?.let {NotificationCompat.Builder(it, NOTIFICATION_CHANNEL_ID).setLargeIcon(BitmapFactory.decodeResource(mContext!!.resources, R.drawable.ic_launcher_foreground)).setSmallIcon(R.drawable.ic_launcher_foreground).setContentTitle("start record").setContentText("=== start record ===").setContentIntent(pendingIntent)};var  notification = notificationBuilder?.build();var  channel = NotificationChannel(NOTIFICATION_CHANNEL_ID, NOTIFICATION_CHANNEL_NAME, NotificationManager.IMPORTANCE_DEFAULT);channel.description = NOTIFICATION_CHANNEL_DESC;var  notificationManager = getSystemService(Context.NOTIFICATION_SERVICE) as NotificationManagernotificationManager.createNotificationChannel(channel)startForeground(1, notification);}}private var isScreenRecoding = falseprivate var  mMediaRecorder: MediaRecorder?=nullprivate var mVirtualDisplay: VirtualDisplay? = nullprivate fun startRecording(filePath:String) {if (!isScreenRecoding){try {// 创建 MediaRecorder 并设置参数val metrics = DisplayMetrics()val windowManager: WindowManager = mContext?.getSystemService(WINDOW_SERVICE) as WindowManagerwindowManager.defaultDisplay.getMetrics(metrics)mMediaRecorder = MediaRecorder()mMediaRecorder?.setVideoSource(MediaRecorder.VideoSource.SURFACE)mMediaRecorder?.setOutputFormat(MediaRecorder.OutputFormat.MPEG_4)mMediaRecorder?.setOutputFile(filePath)mMediaRecorder?.setVideoSize(metrics.widthPixels, metrics.heightPixels)mMediaRecorder?.setVideoEncoder(MediaRecorder.VideoEncoder.H264)mMediaRecorder?.setVideoEncodingBitRate(1920*1080 * 3)mMediaRecorder?.setVideoFrameRate(30)// 准备 MediaRecordermMediaRecorder?.prepare()// 创建 VirtualDisplay 以获取屏幕内容mVirtualDisplay = mMediaProjection?.createVirtualDisplay("ScreenRecord",metrics.widthPixels, metrics.heightPixels, metrics.densityDpi,DisplayManager.VIRTUAL_DISPLAY_FLAG_AUTO_MIRROR,mMediaRecorder?.surface, null, null)// 开始录制mMediaRecorder?.start()isScreenRecoding = trueLog.i(ScreenUtil.TAG,"开始录屏 $filePath")} catch (e: IOException) {Log.e(ScreenUtil.TAG, "录屏失败: " + e.message)e.printStackTrace()}}}public fun stopRecording() {if (isScreenRecoding) {try {// 停止录制mMediaRecorder?.stop()mMediaRecorder?.reset()mMediaRecorder?.release()mMediaRecorder = null// 停止 VirtualDisplaymVirtualDisplay?.release()// 停止 MediaProjectionmMediaProjection?.stop()Log.i(ScreenUtil.TAG,"结束录屏")} catch (e: Exception) {Log.e(ScreenUtil.TAG, "停止录屏失败: " + e.message)e.printStackTrace()}isScreenRecoding = false}}override fun onDestroy() {stopRecording()super.onDestroy()}
}

启动和停止录制

private var mProjectionManager: MediaProjectionManager? = null
var screenService:Intent?=null
fun start(){mProjectionManager = getSystemService(Context.MEDIA_PROJECTION_SERVICE) as MediaProjectionManager// 请求录屏权限startActivityForResult(mProjectionManager?.createScreenCaptureIntent(), 500);
}
fun stop(){stopService(screenService)
}
override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {super.onActivityResult(requestCode, resultCode, data)if (requestCode == 500){screenService = Intent(mConext, ScreenService::class.java)screenService?.let {it.putExtra("resultCode", resultCode);it.putExtra("data", data);it.putExtra("path", "screen.mp4");startForegroundService(it)}}
}