博客

一：申请权限

<!--外存储写权限-->
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>

二：因视频格式无法全屏显示，重写VideoView

package com.example.demo.util;

import android.content.Context;
import android.util.AttributeSet;
import android.widget.VideoView;

public class ConditionVideoView extends VideoView {
    public ConditionVideoView(Context context) {
        super(context);
    }

    public ConditionVideoView(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

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

    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        //使视频全屏播放
        int width = getDefaultSize(0, widthMeasureSpec);
        int height = getDefaultSize(0, heightMeasureSpec);
        setMeasuredDimension(width, height);
    }
}

三：布局文件

<?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"
    tools:context=".VideoActivity"
    android:orientation="vertical"
    android:gravity="center">
    <com.example.demo.util.ConditionVideoView
        android:id="@+id/video"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_above="@+id/btn"
        android:clickable="false"/>
    <LinearLayout
        android:id="@+id/btn"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:gravity="center">
        <Button
            android:id="@+id/play"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="播放"/>
        <Button
            android:id="@+id/stop"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="暂停"/>
        <Button
            android:id="@+id/replay"
            android:text="重新播放"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"/>
    </LinearLayout>
</RelativeLayout>

四：调用

package com.example.demo;

import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;
import androidx.core.app.ActivityCompat;
import androidx.core.content.ContextCompat;

import android.Manifest;
import android.content.pm.PackageManager;
import android.media.MediaPlayer;
import android.net.Uri;
import android.os.Bundle;
import android.view.View;
import android.view.WindowManager;
import android.widget.Button;
import android.widget.MediaController;
import android.widget.Toast;
import android.widget.VideoView;

public class VideoActivity extends AppCompatActivity{
    private Button play;
    private Button pause;
    private Button replay;
    private VideoView video;
    private MediaController mediaController;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);
        setContentView(R.layout.activity_video);

        initView();
    }

    private void initView() {
        video = new VideoView(this);
        video = findViewById(R.id.video);
        mediaController = new MediaController(this);
        play = findViewById(R.id.play);
        pause = findViewById(R.id.stop);
        replay = findViewById(R.id.replay);
        play.setOnClickListener(new Click());
        pause.setOnClickListener(new Click());
        replay.setOnClickListener(new Click());
        if(ContextCompat.checkSelfPermission(VideoActivity.this, Manifest.permission.WRITE_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED){
            ActivityCompat.requestPermissions(VideoActivity.this, new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE}, 1);
        }else {
            initVideoPath();//初始化MediaPlayer
        }
    }

    class Click implements View.OnClickListener {

        @Override
        public void onClick(View v) {
            if (v == play) {
                if(!video.isPlaying()){
                    video.start();//播放
                }
            } else if (v == pause) {
                if(video.isPlaying()){
                    video.pause();//暂停
                }
            } else if (v == replay) {
                if(video.isPlaying()){
                    video.resume();//重新播放
                }
            }
        }
    }

    //用一个单独的方法来实现视频播放初始化
    private void initVideoPath() {
        String uri = "android.resource://" + getPackageName() + "/" + R.raw.video;
        video.setVideoURI(Uri.parse(uri));
        mediaController.setMediaPlayer(video);
        video.setMediaController(mediaController);
        video.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
            @Override
            public void onPrepared(MediaPlayer mp) {
                mp.setLooping(true);//让视频循环播放
            }
        });
    }

    @Override
    //对权限的取得结果进行判断，并针对性操作。获得权限，执行初始化；如果没有获得权限，提示用户。
    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
        super.onRequestPermissionsResult(requestCode, permissions, grantResults);
        switch (requestCode) {
            case 1:
                if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                    initVideoPath();
                } else {
                    Toast.makeText(this, "拒绝权限，无法使用程序。", Toast.LENGTH_LONG).show();
                    finish();
                }
                break;
            default:
                break;
        }
    }

    @Override
    //执行完毕，释放所有资源
    protected void onDestroy() {
        super.onDestroy();
        if(video != null){
            video.suspend();
        }
    }
}