视屏播放主要使用VideoView来实现。他将视屏的显示和控制集一身，使用它可以做一个简单的视频播放器。

File file = new File(Environment.getExternalStorageDirectory(), path);
videoView.setVideoPath(file.getPath()); // 指定视频文件的路径

videoView.start(); // 开始播放

videoView.pause(); // 暂停播放

videoView.resume(); // 重新播放

完整代码：

//视频播放
public class MainActivity extends AppCompatActivity {
    private VideoView videoView;
    private Button play;
    private Button pause;
    private Button replay;
    
    private MediaController mediaController;

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

        initView();
        initData();
    }


    private void initView() {
        videoView = (VideoView) findViewById(R.id.video_view);
        play = (Button) findViewById(R.id.play);
        pause = (Button) findViewById(R.id.pause);
        replay = (Button) findViewById(R.id.replay);

//        //初始化videoview控制条
//        mediaController=new MediaController(this);
//        //设置videoview的控制条
//        videoView.setMediaController(mediaController);
//        //设置显示控制条
//        mediaController.show(0);
    }

    private void initData() {
        if (ContextCompat.checkSelfPermission(MainActivity.this, Manifest.permission.WRITE_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED) {
            ActivityCompat.requestPermissions(MainActivity.this, new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE}, 1);
        } else {
            initVideoPath("123.mp4"); // 初始化MediaPlayer
        }
        play.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if (!videoView.isPlaying()) {
                    videoView.start(); // 开始播放
                }
            }
        });
        pause.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if (videoView.isPlaying()) {
                    videoView.pause(); // 暂停播放
                }
            }
        });
        replay.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if (videoView.isPlaying()) {
                    videoView.resume(); // 重新播放
                }
            }
        });
    }

    private void initVideoPath(String path) {
        File file = new File(Environment.getExternalStorageDirectory(), path);
        videoView.setVideoPath(file.getPath()); // 指定视频文件的路径
    }

    @Override
    public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {
        switch (requestCode) {
            case 1:
                if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                    initVideoPath("movie.mp4");
                } else {
                    Toast.makeText(this, "拒绝权限将无法使用程序", Toast.LENGTH_SHORT).show();
                    finish();
                }
                break;
            default:
        }
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        if (videoView != null) {
            videoView.suspend();
        }
    }
}

对应xml:

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout 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"
    android:orientation="vertical"
    tools:context=".MainActivity">



    <VideoView
        android:id="@+id/video_view"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />
    <LinearLayout
        android:id="@+id/ll"
        android:layout_alignParentBottom="true"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" >

        <Button
            android:id="@+id/play"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="播放" />

        <Button
            android:id="@+id/pause"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="暂停" />

        <Button
            android:id="@+id/replay"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="重播" />

    </LinearLayout>

</RelativeLayout>

转发表明出处：https://blog.csdn.net/qq_35698774/article/details/107053363

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感谢：郭霖的《第一行代码 第二版》