[JAVA][Android] 화면 녹화 기능 만들기

안녕하세요. 오늘은 화면 녹화를 해서 파일에 저장하는 방법에 대해 알아보겠습니다.

 

먼저 매니페스트 파일입니다.

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.song.webrtc">
    <uses-permission android:name="android.permission.RECORD_AUDIO" />
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
    <uses-permission android:name="android.permission.FOREGROUND_SERVICE" />
    <application

        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/Theme.WebRtc"
        android:usesCleartextTraffic="true">
        <activity
            android:name=".MainActivity"
            android:exported="true">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <service
            android:name=".MediaProjectionAccessService"
            android:foregroundServiceType="mediaProjection" />
    </application>

</manifest>

다음은 레이아웃입니다.(activity_main.xml)

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">
    <ToggleButton
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintLeft_toLeftOf="parent"
        android:layout_width="100dp"
        android:layout_height="40dp"
        android:id="@+id/toggle"/>

</androidx.constraintlayout.widget.ConstraintLayout>

다음은 자바 파일입니다.(MainActivity.java)

import androidx.annotation.RequiresApi;
import androidx.appcompat.app.AppCompatActivity;
import androidx.core.app.ActivityCompat;
import androidx.core.content.ContextCompat;

import android.Manifest;
import android.content.Context;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.hardware.display.DisplayManager;
import android.hardware.display.VirtualDisplay;
import android.media.MediaRecorder;
import android.media.projection.MediaProjection;
import android.media.projection.MediaProjectionManager;
import android.os.Build;
import android.os.Bundle;
import android.os.Environment;
import android.util.DisplayMetrics;
import android.util.SparseIntArray;
import android.view.View;
import android.widget.Toast;
import android.widget.ToggleButton;

import java.io.File;
import java.io.IOException;

public class MainActivity extends AppCompatActivity {

    private static final int REQUEST_CODE = 999;
    private int mScreenDensity;
    private MediaProjectionManager mProjectionManager;
    private static final int DISPLAY_WIDTH = 720;
    private static final int DISPLAY_HEIGHT = 1280;
    private MediaProjection mMediaProjection;
    private VirtualDisplay mVirtualDisplay;
    private MediaProjectionCallback mMediaProjectionCallback;
    private ToggleButton mToggleButton;
    private MediaRecorder mMediaRecorder;
    private static final SparseIntArray ORIENTATIONS = new SparseIntArray();

    Intent record_intent;

    @RequiresApi(api = Build.VERSION_CODES.O)
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        requirePermission();

        DisplayMetrics metrics = new DisplayMetrics();
        getWindowManager().getDefaultDisplay().getMetrics(metrics);
        mScreenDensity = metrics.densityDpi;
        mMediaRecorder = new MediaRecorder();
        mProjectionManager = (MediaProjectionManager) getSystemService(Context.MEDIA_PROJECTION_SERVICE);
        mToggleButton =findViewById(R.id.toggle);
        mToggleButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                onToggleScreenShare(view);
            }
        });

    }

    @Override
    public void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        if (requestCode != REQUEST_CODE) {
            return;
        }
        if (resultCode != RESULT_OK) {
            Toast.makeText(this,
                    "Screen Cast Permission Denied", Toast.LENGTH_SHORT).show();
            mToggleButton.setChecked(false);
            return;
        }
        mMediaProjectionCallback = new MediaProjectionCallback();
        mMediaProjection = mProjectionManager.getMediaProjection(resultCode, data);
        mMediaProjection.registerCallback(mMediaProjectionCallback, null);
        mVirtualDisplay = createVirtualDisplay();
        mMediaRecorder.start();
    }

    @RequiresApi(api = Build.VERSION_CODES.O)
    public void onToggleScreenShare(View view) {
        if (((ToggleButton) view).isChecked()) {
            record_intent = new Intent(this,MediaProjectionAccessService.class);
            startForegroundService(record_intent);
            initRecorder();
            shareScreen();
        } else {
            mMediaRecorder.stop();
            mMediaRecorder.reset();

            stopScreenSharing();
            stopService(record_intent);
        }
    }

    private void shareScreen() {
        if (mMediaProjection == null) {
            startActivityForResult(mProjectionManager.createScreenCaptureIntent(), REQUEST_CODE);
            return;
        }
        mVirtualDisplay = createVirtualDisplay();
        mMediaRecorder.start();
    }

    private VirtualDisplay createVirtualDisplay() {
        return mMediaProjection.createVirtualDisplay("MainActivity",
                DISPLAY_WIDTH, DISPLAY_HEIGHT, mScreenDensity,
                DisplayManager.VIRTUAL_DISPLAY_FLAG_AUTO_MIRROR,
                mMediaRecorder.getSurface(), null /*Callbacks*/, null
                /*Handler*/);
    }

    private void initRecorder() {
        try {
            mMediaRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
            mMediaRecorder.setVideoSource(MediaRecorder.VideoSource.SURFACE);
            mMediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
            mMediaRecorder.setOutputFile(Environment
                    .getExternalStoragePublicDirectory(Environment
                            .DIRECTORY_DOWNLOADS) + "/video.mp4");
            mMediaRecorder.setVideoSize(DISPLAY_WIDTH, DISPLAY_HEIGHT);
            mMediaRecorder.setVideoEncoder(MediaRecorder.VideoEncoder.H264);
            mMediaRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
            mMediaRecorder.setVideoEncodingBitRate(512 * 1000);
            mMediaRecorder.setVideoFrameRate(30);
            int rotation = getWindowManager().getDefaultDisplay().getRotation();
            int orientation = ORIENTATIONS.get(rotation + 90);
            mMediaRecorder.setOrientationHint(orientation);
            mMediaRecorder.prepare();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    private class MediaProjectionCallback extends MediaProjection.Callback {
        @Override
        public void onStop() {
            if (mToggleButton.isChecked()) {
                mToggleButton.setChecked(false);
                mMediaRecorder.stop();
                mMediaRecorder.reset();
            }
            mMediaProjection = null;
            stopScreenSharing();
        }
    }

    private void stopScreenSharing() {
        if (mVirtualDisplay == null) {
            return;
        }
        mVirtualDisplay.release();
        destroyMediaProjection();
    }

    @Override
    public void onDestroy() {
        super.onDestroy();
        destroyMediaProjection();
    }

    private void destroyMediaProjection() {
        if (mMediaProjection != null) {
            mMediaProjection.unregisterCallback(mMediaProjectionCallback);
            mMediaProjection.stop();
            mMediaProjection = null;
        }

    }

    //권한 요청 메소드
    private void requirePermission(){
        String[] permissions = {Manifest.permission.RECORD_AUDIO,Manifest.permission.WRITE_EXTERNAL_STORAGE};
        int permissionCheck = ContextCompat.checkSelfPermission(this, Manifest.permission.RECORD_AUDIO);
        int permissionCheck2 = ContextCompat.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE);
        if(permissionCheck == PackageManager.PERMISSION_DENIED || permissionCheck2 == PackageManager.PERMISSION_DENIED){
            ActivityCompat.requestPermissions(this, permissions, 0);
        }


    }
}

자바 서비스 파일입니다.(MediaProjectionAccessService.java)

import android.app.Notification;
import android.app.NotificationChannel;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.app.Service;
import android.content.Intent;
import android.os.Build;
import android.os.IBinder;

import androidx.annotation.Nullable;
import androidx.core.app.NotificationCompat;

public class MediaProjectionAccessService extends Service {
    @Override
    public int onStartCommand(Intent intent, int flags, int startId) {
        createNotificationChannel();
        Intent intent1 = new Intent(this, MainActivity.class);

        PendingIntent pendingIntent1 = PendingIntent.getActivity(this, 0, intent1, 0);

        Notification notification1 = new NotificationCompat.Builder(this, "ScreenRecorder")
                .setContentTitle("yNote studios")
                .setContentText("Filming...")
                .setContentIntent(pendingIntent1).build();

        startForeground(1, notification1);

        return super.onStartCommand(intent, flags, startId);
    }
    @Nullable
    @Override
    public IBinder onBind(Intent intent) {
        return null;
    }
    private void createNotificationChannel() {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O){
            NotificationChannel channel = new NotificationChannel("ScreenRecorder", "Foreground notification",
                    NotificationManager.IMPORTANCE_DEFAULT);
            NotificationManager manager = getSystemService(NotificationManager.class);
            manager.createNotificationChannel(channel);
        }
    }

    @Override
    public void onDestroy() {
        stopForeground(true);
        stopSelf();

        super.onDestroy();
    }
}