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안드로이드 MediaPlayer & VideoView
The document provides an overview of using the Android MediaPlayer and VideoView for video playback, highlighting their differences, setup processes, and functionalities. It covers sample code for playing videos from various sources, managing callbacks, and implementing a full-screen video view. Additionally, it touches on integrating YouTube videos into Android apps and offers references for further reading.
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안드로이드 MediaPlayer & VideoView
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- 3. NHN NEXT Eunjoo Im 1. What arethe difference between MediaPlayer and VideoView for Android 2. How to play videos in android from assets folder or raw folder? 3. Android: mediaplayer went away with unhandled events 4. Playing a video in VideoView in Android 5. Using VideoView for streaming or progressive-download video 6. Full screen videoview without stretching the video 7. Playing youtube video in Android app
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- 5. NHN NEXT Eunjoo Im 안드로이드 미디어 재생 ▪ 오디오, 비디오 재생을 모 두 담당하는 기본 API ▪파일과 스트림 지원 ▪ 볼륨과 ringer mode(벨, 진동 무음) 등 오디오 자 원과 출력을 담당 ▪ 다양한 자원에서 영상을 불러올 수 있는 동영상 재 생 전담 위젯 ▪ UI를 제공하고 확대/축소 와 tint 기능 제공 MediaPlayer AudioManager VideoView
- 6. NHN NEXT Eunjoo Im 안드로이드 미디어 재생 media sourcesLocal Media resources Internal URIs External URLs content://directory/words content URI 표준 접두어 content authority => content provider 식별 path with
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- 8. NHN NEXT Eunjoo Im Media Player SurfaceView ▪ 뷰 위계질서 내에 그릴 수 있는 표면을 제공 ▪ 백그라운드 스레드에서 화면을 업데이트하여 ANR을 방지 ▪Surface 객체를 관리하는 홀더 ▪ MediaPlayer에서 비디오 를 재생하려면 surface를 지정해야함 ▪ SurfaceHolder 생성 후 setDisplay(SurfaceHol der surfaceHolder)
- 9. NHN NEXT Eunjoo Im Media Player constructors : with defaultconstructor public MediaPlayer() + + setDisplay(SurfaceHolder surfaceHolder) + prepare() or prepareAsync()
- 10. NHN NEXT Eunjoo Im Media Player constructors : factory method prepare() or prepareAsync() 성공적으로로드될 경우 자동으로 동기적인 prepare()가 불리기 때문에 대용량 미디어에는 비효율적 surfaceHolder를 지정하지 않으면 audio만 재생
- 11. NHN NEXT Eunjoo Im Media Player Sample code : setup MediaPlayer mediaPlayer = new MediaPlayer(); mediaPlayer.setDataSource(path); mediaPlayer.setDisplay(surfaceHolder); mediaPlayer.prepare(); // mediaPlayer.prepareAsync(); mediaPlayer.start(); MediaPlayer mediaPlayer = MediaPlayer.create(context, R.raw.file1); mediaPlayer.setDisplay(surfaceHolder); mediaPlayer.prepare(); mediaPlayer.start(); with default constructor With create() factory method
- 12. NHN NEXT Eunjoo Im Media Player Idle Initialized Prepared Started Playback Completed Preparing End Error reset() release() setDataSource() OnErrorListener(). onError() prepareAsync() prepare()OnPrepareListener. onPrepared() prepareAsync() stop() stop() Looping ==false && onCompletion() * from OnCompletion Listener start() * from beginning seekTo() seekTo()/pause()pause() start() Looping == true && playback completes seekTo()/start() stop() prepare() start() seekTo() stop() PausedStopped stop() state diagram
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- 15. NHN NEXT Eunjoo Im Media Player Sample code : preparesurface <SurfaceView android:id=“+id/surface” android:layout_width=“400dp” android:layout_height=“240dp” /> xml Activity public class MediaPlayerActivity extends Activity implements SurfaceHolder.Callback { SurfaceView surfaceView; Surfaceholder surfaceHolder; MediaPlayer mediaPlayer; @override public void onCreate(Bundle savedInstanceState) { // surfaceView = (SurfaceView) findViewById(R.id.surface); surfaceHolder = surfaceView.getHolder(); surfaceHolder.addCallback(this); // }
- 16. NHN NEXT Eunjoo Im Media Player Sample code : MediaPlayerset up Activity - Cont. public class MediaPlayerActivity extends Activity implements SurfaceHolder.Callback { // @override public void surfaceCreated(SurfaceHolder holder) { try { mediaPlayer.setDataSource( // ); mediaPlayer.setDisplay(holder); // } catch (Exception e) { // } } }
- 17. NHN NEXT Eunjoo Im Media Player Sample code : controll public class MediaPlayerActivity extends Activity implements SurfaceHolder.Callback { // mediaPlayer.start(); // mediaPlayer.stop(); try { mediaPlayer.prepare(); // 다음 영상 재생 준비 } catch (Exception e) { // } // @Override public void onDestory() { super.onDestroy(); if (mediaPlayer != null) { mediaPlayer.release(); } } } 해당button의 onClickListener에 구현 지원하지 않는 상태에서는 IllegalStateException throw Android: mediaplayer went away with unhandled events
- 18. NHN NEXT Eunjoo Im Media Player Sample code : fullsize <SurfaceView android:id=“+id/surface” android:layout_width=“match_parent” android:layout_height=“match_parent” /> xml Activity public class MediaPlayerActivity extends Activity implements SurfaceHolder.Callback { // @Override public void surfaceCreated(SurfaceHolder holder) { // try { // mediaPlayer.setOnVideoSizeChangedListener(sizeChangeListener); } catch (Exception e) { e.printStackTrace(); } } // Full screen videoview without stretching the video
- 19. NHN NEXT Eunjoo Im Media Player Sample code : fullsize Activity - Cont. public class MediaPlayerActivity extends Activity implements SurfaceHolder.Callback { // MediaPlayer.OnPreparedListener preparedListener = new MediaPlayer.OnPreparedListener() { @Override public void onPrepared(MediaPlayer mp) { Point size = new Point(); int videoWidth = mediaPlayer.getVideoWidth(); int videoHeight = mediaPlayer.getVideoHeight(); float videoProportion = (float) videoWidth / (float) videoHeight; getWindowManager().getDefaultDisplay().getSize(size); int screenWidth = size.x; int screenHeight = size.y; float screenProportion = (float) screenWidth / (float) screenHeight; android.view.ViewGroup.LayoutParams layoutParams = surfaceView.getLayoutParams(); // } // }
- 20. NHN NEXT Eunjoo Im Media Player Sample code : fullsize Activity - Cont. public class MediaPlayerActivity extends Activity implements SurfaceHolder.Callback { // MediaPlayer.OnPreparedListener preparedListener = new MediaPlayer.OnPreparedListener() { @Override public void onPrepared(MediaPlayer mp) { // if (videoProportion > screenProportion) { layoutParams.width = screenWidth; layoutParams.height = (int) ((float) screenWidth / videoProportion); } else { layoutParams.width = (int) (videoProportion * (float) screenHeight); layoutParams.height = screenHeight; } surfaceView.setLayoutParams(layoutParams); } }; }
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- 24. NHN NEXT Eunjoo Im Video View Sample code : setup <VideoView android:id=“@+id/videoView” android:layout_width=“400dp” android:layout_height=“240dp” /> xml Activity public class VideoViewActivity extends Activity { @override public void onCreate(Bundle savedInstanceState) { // VideoView videoView = (VideoView)findViewById(R.id.videoView); // videoView.setVideoPath( // ); // videoView.setVideoURL(url); // final MediaController mediaController = new MediaController(this); videoView.setMediaController(mediaController); } } 예제: 김상형. 『안드로이드 프로그래밍 정복』. 서울: 한빛미디어, 2013.
- 25. NHN NEXT Eunjoo Im Video View Sample code : controll Activity- Cont. public class PlayVideoActivity extends Activity { @override public void onCreate(Bundle savedInstanceState) { // videoView.postDelayed(new Runnable() { public void run() { mediaController.show(0); } }, 100); } 예제: 김상형. 『안드로이드 프로그래밍 정복』. 서울: 한빛미디어, 2013.
- 26. NHN NEXT Eunjoo Im ▪ http://developers.google.com/youtube/android/player/ ▪ 앱 등록으로 개발자 키 발급 필요 ▪프로젝트에 YouTube Data API v3 서비스 추가 필요 ▪ 사용자의 기기에서 YouTube 앱 4.2.16+ 실행 필요 ▪ YouTubePlayerFragment나 YouTubePlayerView를 View에 배치하 고 YouTubePlayer를 사용하여 View에서 동영상 재생을 제어 ▪ 재생 환경의 세밀한 조정 가능 ▪ YouTubeStandalonePlayer를 사용 ▪ 더 간편하고 전체 화면 모드 또는 라이트박스 모드 지원 ▪ 동영상 재생 관련 유연성과 제어 능력 감소 Play YouTube Video YouTube API 클라이언트 라이브러리 Playing youtube video in Android app
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