Androidマルチメディア教程のビデオ再生方法

この記事では主にAndroidで動画を再生する四つの方法を紹介します。
一、intent方式を通じて、システムが持っているプレーヤーを呼び出します。

  Uri uri = Uri.parse("/storage/emulated/0/DCIM/Camera/20170521_200117.mp4");  
 //           
  Intent intent = new Intent(Intent.ACTION_VIEW); 
  intent.setDataAndType(uri, "/storage/emulated/0/DCIM/Camera/20170521_200117.mp4"); 
  startActivity(intent);

二、Video Viewを使う
レイアウトファイル

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
 xmlns:android="http://schemas.android.com/apk/res/android"
 xmlns:tools="http://schemas.android.com/tools"
 android:id="@+id/activity_video_play_by_vv"
 android:layout_width="match_parent"
 android:layout_height="match_parent">

 <VideoView
  android:id="@+id/video_view"
  android:layout_width="wrap_content"
  android:layout_height="wrap_content"/>


</RelativeLayout>

Activity

public class VideoPlayByVVActivity extends AppCompatActivity {

 private VideoView mVideoView;

 @Override
 protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
//  requestWindowFeature(Window.FEATURE_NO_TITLE); //   title
//  setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE); //    
//  getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON); //      
  setContentView(R.layout.activity_video_play_by_vv);
  mVideoView = (VideoView) findViewById(R.id.video_view);

  init();
 }

 private void init() {

  String path = "/storage/emulated/0/DCIM/Camera/20170521_200117.mp4";

  Uri uri = Uri.parse(path);

  mVideoView.setVideoPath(path);

  mVideoView.start();
  mVideoView.requestFocus();

 }
}

三、MediaPlayer+SurfaceView

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
 xmlns:android="http://schemas.android.com/apk/res/android"
 xmlns:tools="http://schemas.android.com/tools"
 android:id="@+id/activity_video_play_by_sur"
 android:layout_width="match_parent"
 android:layout_height="match_parent">
 <SurfaceView
  android:id="@+id/surface_view"
  android:layout_width="180dp"
  android:layout_height="wrap_content"/>
 <LinearLayout
  android:layout_alignParentBottom="true"
  android:layout_width="match_parent"
  android:layout_height="40dp">


  <Button
   android:id="@+id/stop"
   android:text="stop"
   android:layout_weight="1"
   android:layout_width="0dp"
   android:layout_height="match_parent"/>
  <Button
   android:id="@+id/play"
   android:text="play"
   android:layout_weight="1"
   android:layout_width="0dp"
   android:layout_height="match_parent"/>
  <Button
   android:id="@+id/pasue"
   android:text="pasue"
   android:layout_weight="1"
   android:layout_width="0dp"
   android:layout_height="match_parent"/>

 </LinearLayout>
</RelativeLayout>

Activity

public class VideoPlayBySurActivity extends AppCompatActivity implements View.OnClickListener {

 private SurfaceView mSurfaceView;
 private MediaPlayer mMediaPlayer;

 @Override
 protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_video_play_by_sur);
  mSurfaceView = (SurfaceView) findViewById(R.id.surface_view);
  findViewById(R.id.stop).setOnClickListener(this);
  findViewById(R.id.pasue).setOnClickListener(this);

  findViewById(R.id.play).setOnClickListener(this);

  init();
 }

 private void init() {
  mMediaPlayer = new MediaPlayer();

  mSurfaceView.getHolder().addCallback(new SurfaceHolder.Callback() {
   @Override
   public void surfaceCreated(SurfaceHolder holder) {
    play();
   }

   @Override
   public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {

   }

   @Override
   public void surfaceDestroyed(SurfaceHolder holder) {

   }
  });
 }

 @Override
 public void onClick(View v) {
  switch (v.getId()){
   case R.id.stop:
    stop();
    break;
   case R.id.play:
    if(!mMediaPlayer.isPlaying()){
     play();
    }
    break;
   case R.id.pasue:
    pasue();
    break;

  }
 }


 public void stop(){
  if(mMediaPlayer.isPlaying()){
   mMediaPlayer.stop();
  }
 }

 public void pasue(){
  if(mMediaPlayer.isPlaying()){
   mMediaPlayer.pause();
  }else{
   mMediaPlayer.start();
  }
 }

 public void play(){

  String path = "/storage/emulated/0/DCIM/Camera/20170521_200117.mp4";
  try {
   mMediaPlayer.reset();
   mMediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
   //         
   mMediaPlayer.setDataSource(this, Uri.parse(path));
   //        SurfaceView
   mMediaPlayer.setDisplay(mSurfaceView.getHolder());
   mMediaPlayer.prepare();
   mMediaPlayer.start();

  } catch (IOException e) {
   e.printStackTrace();
  }
 }
}

四、MediaPlayer+TextureView

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
 xmlns:android="http://schemas.android.com/apk/res/android"
 xmlns:tools="http://schemas.android.com/tools"
 android:id="@+id/activity_video_play_by_textrue_view"
 android:layout_width="match_parent"
 android:layout_height="match_parent">


 <TextureView
  android:id="@+id/texture_view"
  android:layout_width="wrap_content"
  android:layout_height="wrap_content"/>

 <ImageView
  android:id="@+id/video_image"
  android:layout_width="match_parent"
  android:layout_height="match_parent"
  android:src="@drawable/all_darkbackground"/>
</RelativeLayout>

Activity

public class VideoPlayByTextrueViewActivity extends AppCompatActivity implements MediaPlayer.OnPreparedListener, MediaPlayer.OnInfoListener, MediaPlayer.OnBufferingUpdateListener {

 private TextureView mTextureView;
 private ImageView mImageVideo;
 private Surface mSurface;
 private MediaPlayer mMediaPlayer;
 private static String path = "/storage/emulated/0/DCIM/Camera/20170521_200117.mp4";

 @Override
 protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_video_play_by_textrue_view);

  mTextureView = (TextureView) findViewById(R.id.texture_view);

  mImageVideo = (ImageView) findViewById(R.id.video_image);

  init();
 }

 private void init() {

  mTextureView.setSurfaceTextureListener(new TextureView.SurfaceTextureListener() {
   @Override
   public void onSurfaceTextureAvailable(SurfaceTexture surfaceTexture, int width, int height) {
    mSurface = new Surface(surfaceTexture);

    Log.e("tag", "---- onSurfaceTextureAvailable");

    play();
   }

   @Override
   public void onSurfaceTextureSizeChanged(SurfaceTexture surface, int width, int height) {
    Log.e("tag", "---- onSurfaceTextureSizeChanged");
   }

   @Override
   public boolean onSurfaceTextureDestroyed(SurfaceTexture surface) {
    mTextureView=null;
    mSurface=null;
    mMediaPlayer.stop();
    mMediaPlayer.release();
    return false;
   }

   @Override
   public void onSurfaceTextureUpdated(SurfaceTexture surface) {

   }
  });


 }



 public void play(){


  mMediaPlayer = new MediaPlayer();

  try {
   mMediaPlayer.setDataSource(getApplicationContext(), Uri.parse(path));
   mMediaPlayer.setSurface(mSurface);
   mMediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);

   mMediaPlayer.setOnPreparedListener(this);
   mMediaPlayer.setOnInfoListener(this);
   mMediaPlayer.setOnBufferingUpdateListener(this);

   mMediaPlayer.prepareAsync();

  } catch (IOException e) {
   e.printStackTrace();
  }

 }

 @Override
 public void onPrepared(MediaPlayer mp) {

  mImageVideo.setVisibility(View.GONE);
  mMediaPlayer.start();
 }

 @Override
 public boolean onInfo(MediaPlayer mp, int what, int extra) {
  return false;
 }

 @Override
 public void onBufferingUpdate(MediaPlayer mp, int percent) {

 }
}

参考文献
AndroidのSurfaceViewの使用詳細
Android 5.0（Lollipop）のSurfaceTexture、TextureView、SurfaceView、GLOSurfaceView
Android TextureView簡易教程
締め括りをつける
以上はこの文章の全部の内容です。本文の内容は皆さんの学習や仕事に一定の助けをもたらすことを望んでいます。もし疑問があれば、メッセージを残して交流してください。ありがとうございます。