android 加载网络上的视频播放

package com.example.a406.videodemo;

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

public class MainActivity extends AppCompatActivity {
    private VideoView videoView;
    //private Button btn_start,btn_end;


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
       videoView = (VideoView)findViewById(R.id.videoView);

       //改成自己服务器的Url
        String uri = "";
        videoView.setVideoURI(Uri.parse(uri));
        MediaController mediaController=new MediaController(this);
        mediaController.setMediaPlayer(videoView);
        videoView.setMediaController(mediaController);

    }



}

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.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">
    <VideoView
        android:id="@+id/videoView"
        android:layout_width="match_parent"
        android:layout_height="400dp" />
</android.support.constraint.ConstraintLayout>

注意Manifest.xml中要加权限信息

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