IjkPlayerView代码

IjkPlayerView是一个基于IjkPlayer的Android视频播放器视图，下面是一个简单的代码示例：

1.在build.gradle文件中添加依赖：

implementation 'tv.danmaku.ijk.media:ijkplayer-java:0.8.8'
implementation 'tv.danmaku.ijk.media:ijkplayer-armv7a:0.8.8'
implementation 'tv.danmaku.ijk.media:ijkplayer-exo:0.8.8'

2.创建IjkPlayerView类：

public class IjkPlayerView extends FrameLayout implements SurfaceHolder.Callback, MediaPlayer.OnPreparedListener, MediaPlayer.OnVideoSizeChangedListener, MediaPlayer.OnCompletionListener, MediaPlayer.OnErrorListener {

    private SurfaceView mSurfaceView;
    private SurfaceHolder mSurfaceHolder;
    private MediaPlayer mMediaPlayer;
    private ImageView mPlayPauseView;
    private ProgressBar mProgressBar;
    private TextView mTimeView;
    private boolean mIsPrepared;
    private boolean mIsPlaying;
    private boolean mIsSurfaceCreated;
    private boolean mIsFullScreen;

    public IjkPlayerView(Context context) {
        this(context, null);
    }

    public IjkPlayerView(Context context, AttributeSet attrs) {
        this(context, attrs, 0);
    }

    public IjkPlayerView(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        initView(context);
    }

    private void initView(Context context) {
        LayoutInflater.from(context).inflate(R.layout.view_ijk_player, this, true);
        mSurfaceView = findViewById(R.id.surface_view);
        mSurfaceHolder = mSurfaceView.getHolder();
        mSurfaceHolder.addCallback(this);
        mPlayPauseView = findViewById(R.id.play_pause_view);
        mProgressBar = findViewById(R.id.progress_bar);
        mTimeView = findViewById(R.id.time_view);
        mPlayPauseView.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {
                if (mIsPlaying) {
                    pause();
                } else {
                    play();
                }
            }
        });
    }

    public void play(String url) {
        if (TextUtils.isEmpty(url)) {
            return;
        }
        if (mMediaPlayer == null) {
            mMediaPlayer = new MediaPlayer();
            mMediaPlayer.setOnPreparedListener(this);
            mMediaPlayer.setOnVideoSizeChangedListener(this);
            mMediaPlayer.setOnCompletionListener(this);
            mMediaPlayer.setOnErrorListener(this);
        }
        try {
            mMediaPlayer.setDataSource(url);
            mMediaPlayer.prepareAsync();
            mProgressBar.setVisibility(View.VISIBLE);
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    public void play() {
        if (mMediaPlayer != null && mIsPrepared) {
            mMediaPlayer.start();
            mPlayPauseView.setImageResource(R.drawable.ic_pause);
            mIsPlaying = true;
        }
    }

    public void pause() {
        if (mMediaPlayer != null && mIsPrepared) {
            mMediaPlayer.pause();
            mPlayPauseView.setImageResource(R.drawable.ic_play);
            mIsPlaying = false;
        }
    }

    public void stop() {
        if (mMediaPlayer != null && mIsPrepared) {
            mMediaPlayer.stop();
            mMediaPlayer.release();
            mMediaPlayer = null;
            mIsPrepared = false;
            mIsPlaying = false;
            mSurfaceView.setVisibility(View.GONE);
            mProgressBar.setVisibility(View.GONE);
            mTimeView.setVisibility(View.GONE);
            mPlayPauseView.setVisibility(View.GONE);
        }
    }

    public void toggleFullScreen() {
        mIsFullScreen = !mIsFullScreen;
        if (mIsFullScreen) {
            ((Activity) getContext()).getWindow().addFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN);
            setLayoutParams(new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT));
        } else {
            ((Activity) getContext()).getWindow().clearFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN);
            setLayoutParams(new LayoutParams(LayoutParams.MATCH_PARENT, getResources().getDimensionPixelSize(R.dimen.ijk_player_height)));
        }
    }

    @Override
    public void surfaceCreated(SurfaceHolder holder) {
        mIsSurfaceCreated = true;
    }

    @Override
    public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
        if (mMediaPlayer != null && mIsSurfaceCreated && mIsPrepared) {
            mMediaPlayer.setDisplay(mSurfaceHolder);
        }
    }

    @Override
    public void surfaceDestroyed(SurfaceHolder holder) {
        mIsSurfaceCreated = false;
    }

    @Override
    public void onPrepared(MediaPlayer mp) {
        mIsPrepared = true;
        mProgressBar.setVisibility(View.GONE);
        mSurfaceView.setVisibility(View.VISIBLE);
        mTimeView.setVisibility(View.VISIBLE);
        mPlayPauseView.setVisibility(View.VISIBLE);
        mMediaPlayer.setDisplay(mSurfaceHolder);
        play();
    }

    @Override
    public void onVideoSizeChanged(MediaPlayer mp, int width, int height) {
        int videoWidth = mp.getVideoWidth();
        int videoHeight = mp.getVideoHeight();
        if (videoWidth != 0 && videoHeight != 0) {
            float ratio = Math.min((float) getWidth() / videoWidth, (float) getHeight() / videoHeight);
            int newWidth = (int) (videoWidth * ratio);
            int newHeight = (int) (videoHeight * ratio);
            LayoutParams layoutParams = (LayoutParams) mSurfaceView.getLayoutParams();
            layoutParams.width = newWidth;
            layoutParams.height = newHeight;
            mSurfaceView.setLayoutParams(layoutParams);
        }
    }

    @Override
    public void onCompletion(MediaPlayer mp) {
        mIsPlaying = false;
        mPlayPauseView.setImageResource(R.drawable.ic_play);
    }

    @Override
    public boolean onError(MediaPlayer mp, int what, int extra) {
        mProgressBar.setVisibility(View.GONE);
        Toast.makeText(getContext(), "播放出错", Toast.LENGTH_SHORT).show();
        return false;
    }
}

3.创建view_ijk_player.xml布局文件：

<merge xmlns:android="http://schemas.android.com/apk/res/android">

    <SurfaceView
        android:id="@+id/surface_view"
        android:layout_width="match_parent"
        android:layout_height="@dimen/ijk_player_height"
        android:layout_gravity="center"/>

    <ImageView
        android:id="@+id/play_pause_view"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:src="@drawable/ic_play"/>

    <ProgressBar
        android:id="@+id/progress_bar"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center"/>

    <TextView
        android:id="@+id/time_view"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="bottom|right"
        android:textColor="#ffffff"
        android:textSize="12sp"
        android:text="00:00/00:00"/>

</merge>

使用时可以在布局文件中添加IjkPlayerView，然后调用play方法即可播放视频，调用stop方法停止播放。可以在Activity中添加如下代码：

private IjkPlayerView mPlayerView;

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

    mPlayerView = findViewById(R.id.player_view);
    mPlayerView.play("http://xxx.mp4");
}

@Override
protected void onStop() {
    super.onStop();
    mPlayerView.stop();
}

以上代码仅供参考，实际应用中还需要根据需求进行修改和优化。