Android 视频播放VideoView

VideoView是Android用来实现视频播放的主要控件，VideoView内部是使用MediaPlayer来对视频文件进行控制的。但是他支持的格式比较单一，只支持mp4,avi,3gp等格式的视频。

2:常用的方法：

• setVideoPath：设置要播放的视频文件的位置
• start：开始或继续播放视频
• pause：暂停播放视频
• resume：将视频从头开始播放
• seekTo：从指定的位置开始播放视频
• isPlaying：判断当前是否正在播放视频
• getDuration：获取载入的视频文件的时长

3.简单的播放视频Demo

• 需要添加sd卡权限

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>

• 布局

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content">

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

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

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

    </LinearLayout>

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


</LinearLayout>

• Activity

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.os.Bundle;
import android.os.Environment;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;
import android.widget.VideoView;

import java.io.File;

public class MainActivity extends AppCompatActivity implements View.OnClickListener {
    private Button play;
    private Button pause;
    private Button replay;
    private VideoView videoView;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        videoView = findViewById(R.id.video);
        play = findViewById(R.id.play);
        pause = findViewById(R.id.pause);
        replay = findViewById(R.id.replay);

        play.setOnClickListener(this);
        pause.setOnClickListener(this);
        replay.setOnClickListener(this);

        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();
        }                               //初始化权限



    }



    @Override
    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
        switch (requestCode){
            case 1:
                if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED){
                    initVideoPath();
                }else {
                    Toast.makeText(this,"权限拒绝",Toast.LENGTH_LONG).show();
                    finish();
                }
                break;
                default:
        }
    }

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

    private void initVideoPath(){
        File file = new File(Environment.getExternalStorageDirectory(),"环塔.mp4");
        videoView.setVideoPath(file.getPath());                 //指定视频文件路径
    }

    @Override
    public void onClick(View view) {
        switch (view.getId()){
            case R.id.play:
                if (!videoView.isPlaying()){
                    videoView.start();                          //开始播放
                }
                break;
            case R.id.pause:
                if (videoView.isPlaying()){
                    videoView.pause();                          //暂停播放
                }
                break;
            case R.id.replay:
                if (videoView.isPlaying()){
                    videoView.resume();                         //重新播放
                }
                break;
        }
    }
}

image.png