Android多媒体之VideoView视频播放器

<?xml version="1.0" encoding="utf-8"?>
<linearlayout xmlns:android="http://schemas.android.com/apk/res/android"
 xmlns:tools="http://schemas.android.com/tools"
 android:id="@+id/activity_media_play"
 android:layout_width="match_parent"
 android:layout_height="match_parent"
 android:paddingbottom="@dimen/activity_vertical_margin"
 android:paddingleft="@dimen/activity_horizontal_margin"
 android:paddingright="@dimen/activity_horizontal_margin"
 android:paddingtop="@dimen/activity_vertical_margin"
 android:orientation="vertical"
 tools:context="com.zking.android_contentresolve.mediaplayactivity">


 <surfaceview
  android:layout_width="match_parent"
  android:layout_height="300dp"
  android:id="@+id/sv_media_surface"
  />



 <linearlayout
  android:layout_width="match_parent"
  android:layout_height="wrap_content"
  android:orientation="horizontal"
  >
  <seekbar
   android:layout_width="wrap_content"
   android:layout_height="wrap_content"
   android:id="@+id/seekbar"
   android:layout_weight="1" />

  <imagebutton
   android:layout_width="wrap_content"
   android:layout_height="wrap_content"
   android:src="@android:drawable/ic_media_play"
   android:onclick="isplayorpause"
   />
 </linearlayout>
</linearlayout>

//播放内存上的视频
mediaplayer.setdatasource(this, uri.parse("file://mnt/sdcard/movies/sister.mp4"));

//准备(内存卡)
mediaplayer.prepare();

//将媒体播放器捕捉的画面展示在surfaceview 上
mediaplayer.setdisplay(sv_media_surface.getholder());

public class mediaplayactivity extends appcompatactivity {
 private seekbar seekbar;
 private mediaplayer mediaplayer;
 private surfaceview sv_media_surface;

 @override
 protected void oncreate(bundle savedinstancestate) {
  super.oncreate(savedinstancestate);
  setcontentview(r.layout.activity_media_play);
  seekbar = (seekbar) findviewbyid(r.id.seekbar);
  sv_media_surface = (surfaceview) findviewbyid(r.id.sv_media_surface);

  seekbar.setonseekbarchangelistener(new seekbar.onseekbarchangelistener() {
   @override
   public void onprogresschanged(seekbar seekbar, int progress, boolean fromuser) {

   }

   @override
   public void onstarttrackingtouch(seekbar seekbar) {

   }

   @override
   public void onstoptrackingtouch(seekbar seekbar) {
    //获取拖动结束后的位置
    int progress=seekbar.getprogress();
    //跳转到某个位置播放
    mediaplayer.seekto(progress);
   }
  });
 }

 public void isplayorpause(view view){
  final imagebutton imagebutton= (imagebutton) view;

  if(mediaplayer==null){//代表第一次播放音乐

   //播放内存卡内的音频
   mediaplayer=new mediaplayer();
   //设置类型
   mediaplayer.setaudiostreamtype(audiomanager.stream_music);
   //设置音源
   try {
    //播放内存上的视频
    mediaplayer.setdatasource(this, uri.parse("file://mnt/sdcard/movies/sister.mp4"));
    //准备(内存卡)
    mediaplayer.prepare();

    //将媒体播放器捕捉的画面展示在surfaceview 上
    mediaplayer.setdisplay(sv_media_surface.getholder());

    //必须在播放前加载音频文件(异步准备)
//    mediaplayer.prepareasync();

   } catch (ioexception e) {
    e.printstacktrace();
   }

   mediaplayer.start();
   //把图标改成暂停的图标（这里的暂停图标就是播放时的状态）
   imagebutton.setimageresource(android.r.drawable.ic_media_pause);

   //获取音乐的总时长
   int duration=mediaplayer.getduration();
   //设置进度条的最大值为音乐的总时长
   seekbar.setmax(duration);

   new mythread();
  }else if(mediaplayer.isplaying()){//正在播放音乐
   mediaplayer.pause();
   //把图标改成播放的图标（暂停状态）
   imagebutton.setimageresource(android.r.drawable.ic_media_play);
  }else{
   mediaplayer.start();
   imagebutton.setimageresource(android.r.drawable.ic_media_pause);
  }

 }

 class mythread extends thread{
  @override
  public void run() {
   super.run();
   while(seekbar.getprogress()<seekbar.getmax()){
    //获取当前音乐播放的位置
    int currentposition=mediaplayer.getcurrentposition();
    //让进度条跟着时间走
    seekbar.setprogress(currentposition);

   }
  }
 }


}

 <videoview
  android:layout_width="match_parent"
  android:layout_height="300dp"
  android:id="@+id/vv_main_vedio"
  />

public class vedioactivity extends appcompatactivity {

 private videoview vv_main_vedio;

 @override
 protected void oncreate(bundle savedinstancestate) {
  super.oncreate(savedinstancestate);
  setcontentview(r.layout.activity_vedio);
  vv_main_vedio = (videoview) findviewbyid(r.id.vv_main_vedio);

  //给videoview设置播放来源
  vv_main_vedio.setvideopath("file://mnt/sdcard/movies/sister.mp4");

  //实例化媒体控制器
  mediacontroller mediacontroller=new mediacontroller(this);

  //给activity_vedio设置控制器
  vv_main_vedio.setmediacontroller(mediacontroller);

  mediacontroller.setmediaplayer(vv_main_vedio);

 }
}