安卓SurfaceView+MediaPlayer实现视频播放

直接上代码

<?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">


    <SurfaceView
        android:layout_centerInParent="true"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/surfaceView"
        tools:ignore="MissingConstraints" />

</androidx.constraintlayout.widget.ConstraintLayout>

package com.example.myapplication;

import androidx.appcompat.app.AppCompatActivity;

import android.animation.ObjectAnimator;
import android.graphics.Bitmap;
import android.graphics.Color;
import android.media.MediaMetadataRetriever;
import android.media.MediaPlayer;
import android.net.Uri;
import android.os.Bundle;
import android.view.MotionEvent;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.View;
import android.widget.ImageView;

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

public class MainActivity extends AppCompatActivity {

    private MediaPlayer mediaPlayer;
    private SurfaceView surfaceView;
    private ImageView img;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        surfaceView = (SurfaceView) findViewById(R.id.surfaceView);
        img =  findViewById(R.id.img);
        surfaceView.setZOrderOnTop(true);
        surfaceView.getHolder().setFormat(Color.TRANSPARENT);

        initView();
    }

    //图片渐变消失
    public void animationView() {
        ObjectAnimator objectAnimator = ObjectAnimator.ofFloat(img, "alpha", 1f, 0f);
        objectAnimator.setDuration(2000);
        objectAnimator.start();
    }

    private void initView() {
        mediaPlayer = new MediaPlayer();
        //获取SurfaceHolder 可以通过该接口来操作SurfaceView中的Surface
        SurfaceHolder surfaceHolder = surfaceView.getHolder();
        //设置Meiaplayer的准备监听
        mediaPlayer.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
            @Override
            public void onPrepared(MediaPlayer mp) {
                //准备完成后播放
                mediaPlayer.start();
            }
        });

        surfaceHolder.addCallback(new SurfaceHolder.Callback() {
            //当SurfaceView中Surface创建时回掉
            //该方法表示Surface已经创建完成，可以在该方法中进行绘图操作
            @Override
            public void surfaceCreated(SurfaceHolder holder) {
                mediaPlayer.reset();
                try {
                    //设置视屏文件图像的显示参数
                    mediaPlayer.setDisplay(holder);

                    String videoUrl1 = "android.resource://" + getPackageName() + "/" + R.raw.handwrite_tutorial_animation;
                    Uri uri = Uri.parse(videoUrl1);

                    //file.getAbsolutePath()本地视频
                    //uri 网络视频
                    mediaPlayer.setDataSource(MainActivity.this,uri);
                    //获取第一帧图片
                    MediaMetadataRetriever retriever = new MediaMetadataRetriever();
                    retriever.setDataSource(MainActivity.this,uri);
                    Bitmap bitmap = retriever.getFrameAtTime(1+1L,MediaMetadataRetriever.OPTION_CLOSEST_SYNC);
                    img.setImageBitmap(bitmap);
                    animationView();
                    retriever.release();


//                    mediaPlayer.setOnPreparedListener(mediaPlayer -> {
//                        mediaPlayer.setOnInfoListener((mp, what, extra) -> {
//                            if (what == MediaPlayer.MEDIA_INFO_VIDEO_RENDERING_START)
//                                surfaceView.setBackgroundColor(Color.TRANSPARENT);
//                            return true;
//                        });
//                    });
                    //prepare();表示准备工作同步进行，（准备工作在UI线程中进行）
                    //当播放网络视频时，如果网络不要 会报ARN 所以不采用该方法
                    //mediaPlayer.prepare();
                    //异步准备 准备工作在子线程中进行 当播放网络视频时候一般采用此方法
                    mediaPlayer.prepareAsync();
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }

            //当SurfaceView的大小发生改变时候触发该方法
            @Override
            public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {

            }
            //Surface销毁时回掉
            //当Surface销毁时候，同时把MediaPlayer也销毁
            @Override
            public void surfaceDestroyed(SurfaceHolder holder) {
                if (mediaPlayer!=null) {
                    mediaPlayer.stop();
                    //释放资源
                    mediaPlayer.release();
                }
            }
        });
        //设置 surfaceView点击监听
        surfaceView.setOnTouchListener(new View.OnTouchListener() {
            @Override
            public boolean onTouch(View v, MotionEvent event) {
                switch (event.getAction()) {
                    case MotionEvent.ACTION_DOWN:
                        if (mediaPlayer.isPlaying()) {
                            mediaPlayer.pause();
                        } else {
                            mediaPlayer.start();
                        }
                        break;
                }
                //返回True代表事件已经处理了
                return true;
            }
        });
    }


    @Override
    protected void onResume() {
        super.onResume();
        initView();
    }
}