Android realizes one-click screen recording function (with source code)

<uses-permission android:name=".FOREGROUND_SERVICE"/>
<uses-permission android:name=".WRITE_EXTERNAL_STORAGE"/>
<uses-permission android:name=".RECORD_AUDIO"/>

// app/
plugins {
  id ''
  id 'kotlin-android'
}
 
android {
  compileSdk 34
  defaultConfig {
    applicationId ""
    minSdk 23
    targetSdk 34
  }
  buildFeatures { viewBinding true }
}
 
dependencies {
  implementation ":appcompat:1.6.1"
  implementation ":core-ktx:1.10.1"
  implementation ":lifecycle-runtime-ktx:2.6.1"
}

// =======================================================
// document:// Description: Permission application and Service statement// =======================================================
<manifest xmlns:andro
    package="">
 
  <uses-permission android:name=".FOREGROUND_SERVICE"/>
  <uses-permission android:name=".WRITE_EXTERNAL_STORAGE"/>
  <uses-permission android:name=".RECORD_AUDIO"/>
 
  <application
      android:name=".App"
      android:theme="@style/">
    <activity android:name=".MainActivity"
        android:exported="true">
      <intent-filter>
        <action android:name=""/>
        <category android:name=""/>
      </intent-filter>
    </activity>
    <service android:name=".ScreenRecordService"
        android:exported="false"/>
  </application>
</manifest>
 
// =======================================================
// document:// Description: Application, used to initialize notification channels// =======================================================
package 
 
import 
import 
import 
import 
 
class App : Application() {
  companion object { const val CHANNEL_ID = "screen_recorder_channel" }
  override fun onCreate() {
    ()
    if (.SDK_INT >= Build.VERSION_CODES.O) {
      NotificationManager::
        .getSystemService(NotificationManager::)
        .createNotificationChannel(
          NotificationChannel(
            CHANNEL_ID,
            "Screen Recorder Service",
            NotificationManager.IMPORTANCE_LOW
          )
        )
    }
  }
}
 
// =======================================================
// File: res/values/// Description: Apply topic// =======================================================
<resources>
  <style name="" parent=""/>
</resources>
 
// =======================================================
// File: res/layout/activity_main.xml// Description: Main interface, control recording and playback// =======================================================
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:andro
    android:layout_width="match_parent" android:layout_height="match_parent"
    android:padding="24dp">
 
  <LinearLayout
      android:layout_width="match_parent" android:layout_height="wrap_content"
      android:orientation="vertical" android:gravity="center">
 
    <Button
        android:
        android:layout_width="wrap_content" android:layout_height="wrap_content"
        android:text="Start recording"/>
 
    <Button
        android:
        android:layout_width="wrap_content" android:layout_height="wrap_content"
        android:text="Stop recording"
        android:layout_marginTop="16dp"
        android:enabled="false"/>
 
    <TextView
        android:
        android:layout_width="match_parent" android:layout_height="wrap_content"
        android:layout_marginTop="16dp"
        android:text="Recording Path:"/>
  </LinearLayout>
</FrameLayout>
 
// =======================================================
// document:// Description: Apply for permission, initiate screen recording authorization, start/stop Service// =======================================================
package 
 
import 
import 
import 
import 
import 
import 
import 
import 
 
class MainActivity : AppCompatActivity() {
  private lateinit var b: ActivityMainBinding
  private lateinit var projectionManager: MediaProjectionManager
  private var resultCode = Activity.RESULT_CANCELED
  private var resultData: Intent? = null
 
  private val reqStorage = registerForActivityResult(
    ()
  ) { granted ->
    if (!granted) finish()
  }
 
  private val reqScreen = registerForActivityResult(
    ()
  ) { res ->
    if ( == Activity.RESULT_OK) {
      resultCode = 
      resultData = 
      startService()
    }
  }
 
  override fun onCreate(s: Bundle?) {
    (s)
    b = (layoutInflater)
    setContentView()
 
    projectionManager = getSystemService(MEDIA_PROJECTION_SERVICE)
      as MediaProjectionManager
 
    (.WRITE_EXTERNAL_STORAGE)
 
     {
      (())
    }
     {
      stopService(Intent(this, ScreenRecordService::))
    }
  }
 
  private fun startService() {
    val intent = Intent(this, ScreenRecordService::).apply {
      putExtra("code", resultCode)
      putExtra("data", resultData)
    }
    startService(intent)
     = false
     = true
  }
}
 
// =======================================================
// document:// Description: Front Desk Service, Manage MediaRecorder and MediaProjection// =======================================================
package 
 
import 
import 
import 
import 
import 
import 
import 
import 
import 
import .*
import 
import 
import 
import 
import .*
 
class ScreenRecordService : Service() {
  private lateinit var recorder: MediaRecorder
  private var projection: MediaProjection? = null
  private var virtualDisplay: VirtualDisplay? = null
  private lateinit var projectionManager: MediaProjectionManager
  private lateinit var outputFile: String
 
  override fun onCreate() {
    ()
    projectionManager = getSystemService(MEDIA_PROJECTION_SERVICE)
      as MediaProjectionManager
    recorder = MediaRecorder()
  }
 
  override fun onStartCommand(intent: Intent?, flags: Int, startId: Int): Int {
    val code = intent?.getIntExtra("code", -1) ?: -1
    val data = intent?.getParcelableExtra<Intent>("data")
    if (code != -1 && data != null) {
      initRecorder()
      projection = (code, data)
      virtualDisplay = projection?.createVirtualDisplay(
        "ScreenRecorder",
        , , ,
        DisplayManager.VIRTUAL_DISPLAY_FLAG_AUTO_MIRROR,
        , null, null
      )
      ()
      startForeground(1, buildNotification())
    }
    return START_NOT_STICKY
  }
 
  private fun initRecorder() {
    val metrics = 
    val width = 
    val height = 
     {
      setAudioSource()
      setVideoSource()
      setOutputFormat(.MPEG_4)
      outputFile = createOutputFile()
      setOutputFile(outputFile)
      setVideoEncoder(.H264)
      setAudioEncoder()
      setVideoSize(width, height)
      setVideoFrameRate(30)
      setVideoEncodingBitRate(8_000_000)
      setOrientationHint(0)
      prepare()
    }
  }
 
  private fun createOutputFile(): String {
    val sd = File(getExternalFilesDir(null), "RecordVideos")
    if (!()) ()
    val name = "SCR_${SimpleDateFormat("yyyyMMdd_HHmmss",
      ).format(Date())}.mp4"
    return File(sd, name).absolutePath
  }
 
  private fun buildNotification(): Notification {
    val pi = (
      this,0,
      Intent(this, MainActivity::), PendingIntent.FLAG_IMMUTABLE
    )
    return (this, App.CHANNEL_ID)
      .setContentTitle("Recording screen")
      .setSmallIcon(.ic_record)
      .setContentIntent(pi)
      .setOngoing(true)
      .build()
  }
 
  override fun onDestroy() {
    ()
    ()
    ()
    virtualDisplay?.release()
    projection?.stop()
    // Notify the system library to update files    sendBroadcast(Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE).apply {
      data = (File(outputFile))
    })
  }
 
  override fun onBind(intent: Intent?) = null
}
 
// =======================================================
// File: res/drawable/ic_record.xml// Description: Recording status icon (Sample available system resources)// =======================================================
<vector xmlns:andro
  android:width="24dp" android:height="24dp" android:viewportWidth="24"
  android:viewportHeight="24">
  <path
      android:fillColor="#F44336"
      android:pathData="M12,3C7.03,3 3,7.03 3,12s4.03,9 9,9 9,-4.03 9,-9S16.97,3 12,3zM12,19c-3.86,0 -7,-3.14 -7,-7s3.14,-7 7,-7 7,3.14 7,7 -3.14,7 -7,7z"/>
  <circle
      android:fillColor="#F44336"
      android:cx="12" android:cy="12" android:r="5"/>
</vector>