Android播放视频

首先，在activity_video中写出相应的布局

<?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">


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

</LinearLayout>

在相对应的Activity中实现播放视频的功能（VideoActivity）

package com.example.android28_playvideo;

import android.net.Uri;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.MediaController;
import android.widget.VideoView;

public class VideoActivity extends AppCompatActivity {

    private VideoView vv_video;

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

       //获取VideoView的ID
        vv_video = (VideoView) findViewById(R.id.vv_video);

       //获取视频的路径
        vv_video.setVideoURI(Uri.parse("file://mnt/sdcard/dcim/camera/VID_20170714_195920.mp4"));

        //视频管理者
       MediaController mediaController=new MediaController(this);

     //播放视频
        mediaController.setMediaPlayer(vv_video);
        vv_video.setMediaController(mediaController);
    }
}