Android之使用VideoView播放视频

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界面效果

这里写图片描述

代码

界面代码

<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent"    tools:context="com.example.ygd.myvideotest.MainActivity">    <VideoView        android:id="@+id/vv"        android:layout_width="match_parent"        android:layout_height="match_parent"        android:layout_centerInParent="true"/></RelativeLayout>

程序代码

package com.example.ygd.myvideotest;import android.media.MediaPlayer;import android.net.Uri;import android.os.Bundle;import android.os.Environment;import android.support.v7.app.AppCompatActivity;import android.widget.MediaController;import android.widget.Toast;import android.widget.VideoView;public class MainActivity extends AppCompatActivity {    private VideoView videoView;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        videoView= (VideoView) findViewById(R.id.vv);        //视频控制器        MediaController mediaController=new MediaController(this);        videoView.setMediaController(mediaController);        //视频文件路径        Uri uri=Uri.parse(Environment.getExternalStorageDirectory().getPath()+"/DCIM/Camera/20150514_133937.mp4");        videoView.setVideoURI(uri);        //视频播放结束时的监听        videoView.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {            @Override            public void onCompletion(MediaPlayer mp) {                Toast.makeText(MainActivity.this, "播放完毕", Toast.LENGTH_SHORT).show();            }        });        //视频播放出错时的监听        videoView.setOnErrorListener(new MediaPlayer.OnErrorListener() {            @Override            public boolean onError(MediaPlayer mp, int what, int extra) {                Toast.makeText(MainActivity.this, "加载失败", Toast.LENGTH_SHORT).show();                return false;            }        });    }}

最后不要忘了在清单文件中加读sd卡权限

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

优化

VideoView控件不支持将视频全屏播放，我们可以通过重写VideoView来实现全屏播放。复制如下代码到MyVideoView.java文件中，将使用VideoView的地方替换成MyVideoView，即可实现下图全屏播放的效果

界面效果

这里写图片描述

代码

package com.example.ygd.myvideotest;import android.content.Context;import android.media.MediaPlayer;import android.util.AttributeSet;import android.view.KeyEvent;import android.widget.VideoView;public class MyVideoView extends VideoView { public MyVideoView(Context context) {  super(context);  // TODO Auto-generated constructor stub } public MyVideoView(Context context, AttributeSet attrs) {  super(context, attrs);  // TODO Auto-generated constructor stub0 ~3 K( G/ M( B# I) ` } public MyVideoView(Context context, AttributeSet attrs, int defStyle) {  super(context, attrs, defStyle);  // TODO Auto-generated constructor stub } @Override protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {  // TODO Auto-generated method stub //重点。  int width = getDefaultSize(0, widthMeasureSpec);  int height = getDefaultSize(0, heightMeasureSpec);  setMeasuredDimension(width, height); } @Override public void setOnPreparedListener(MediaPlayer.OnPreparedListener l) {  // TODO Auto-generated method stub  super.setOnPreparedListener(l); } @Override public boolean onKeyDown(int keyCode, KeyEvent event) {  // TODO Auto-generated method stub  return super.onKeyDown(keyCode, event); }}

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