Ijkplayer是B站开源的一款多媒体播放引擎，其基于ffmpeg开并支持很多的在线媒体播放格式。本文实现了在安卓TV上播放各大电视台的直播，其格式是.m3u8。当然了只要是编译的Ijkplayer支持的格式这款播放器自然可以播放。

首先上界面：

播放器界面非常简单，因为是用电视遥控器操作，所以布局和操作力求简单易用。布局分为播放区域和左侧菜单，按遥控器的确定按钮调出菜单，可以选择界面确认后进入播放界面。下面开始讲如何实现：

一，创建布局

播放器主界面布局文件activity_play_rel.xml

<?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"     android:layout_width="match_parent"     android:layout_height="match_parent"     android:orientation="vertical">      <LinearLayout         android:layout_width="fill_parent"         android:layout_height="fill_parent"         android:orientation="vertical">          <RelativeLayout             android:id="@+id/fl_videoview"             android:layout_width="match_parent"             android:layout_height="match_parent"             android:background="@color/colorBlack">              <com.gxf.liveplay.ijkplayer.media.IjkVideoView                 android:id="@+id/videoview"                 android:layout_width="match_parent"                 android:layout_height="match_parent"                 android:layout_centerInParent="true"                 android:background="@color/colorBlack"></com.gxf.liveplay.ijkplayer.media.IjkVideoView>              <RelativeLayout                 android:id="@+id/rl_loading"                 android:layout_width="match_parent"                 android:layout_height="match_parent"                 android:background="#de262a3b">                  <TextView                     android:id="@+id/tv_load_msg"                     android:layout_width="wrap_content"                     android:layout_height="wrap_content"                     android:layout_below="@+id/pb_loading"                     android:layout_centerInParent="true"                     android:layout_marginTop="6dp"                     android:textColor="#ffffff"                     android:textSize="16sp" />                  <ProgressBar                     android:id="@+id/pb_loading"                     android:layout_width="60dp"                     android:layout_height="60dp"                     android:layout_centerInParent="true"                     android:layout_marginTop="60dp"                     android:indeterminate="false"                     android:indeterminateDrawable="@drawable/video_loading"                     android:padding="5dp" />             </RelativeLayout>              <!-- <LinearLayout                  android:layout_width="match_parent"                  android:layout_height="wrap_content"                  android:background="@color/player_panel_background_color">                   <TextView                      android:id="@+id/tv_title"                      android:layout_width="wrap_content"                      android:layout_height="60dp"                      android:textSize="24dp"                      android:text=""                      android:layout_centerVertical="true"                      android:layout_marginTop="18dp"                      android:textColor="@color/white"/>                   <TextView                      android:id="@+id/tv_time"                      android:layout_width="wrap_content"                      android:layout_height="60dp"                      android:textSize="20dp"                      android:layout_toRightOf="@id/tv_title"                      android:layout_alignParentRight="true"                      android:layout_centerVertical="true"                      android:layout_marginLeft="60dp"                      android:layout_marginTop="20dp"                      android:textColor="@color/white"/>              </LinearLayout>-->         </RelativeLayout>     </LinearLayout>      <include layout="@layout/layout_menu" /> </RelativeLayout>

整体分为两部分：上边为播放器实现的界面布局，下边为左侧菜单布局。这里没有采用滑动调出左侧菜单的效果，只是采用相对布局通过设定菜单的宽带直接覆盖在播放器布局之上。IjkVidoView下边的是播放器的控制器布局，可以扩展实现进度音量等控制，本文尚未实现。

接下来看左侧菜单布局文件layout_menu.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"     android:layout_width="360dp"     android:layout_height="match_parent"     android:id="@+id/leftMenuCtrl"     android:layout_gravity="left"     android:visibility="gone"     android:background="@drawable/dark_no_shadow"     android:orientation="vertical">      <LinearLayout         android:layout_width="wrap_content"         android:layout_height="0dp"         android:layout_weight="1"         android:layout_gravity="center"         android:orientation="horizontal">          <ImageButton             android:id="@+id/turnLeft"             android:layout_width="30px"             android:layout_height="40px"             android:layout_gravity="center"             android:adjustViewBounds="false"             android:background="@drawable/tv_switch_bg_left"             android:onClick="turnLeft" />          <TextView             android:id="@+id/tvGroupTitle"             android:layout_width="300px"             android:layout_height="100px"             android:layout_gravity="center"             android:gravity="center"             android:text="我的频道"             android:textColor="@color/white"             android:textSize="24sp"             android:textStyle="bold"  />          <ImageButton             android:id="@+id/turnRight"             android:layout_width="30px"             android:layout_height="40px"             android:layout_gravity="center"             android:adjustViewBounds="false"             android:background="@drawable/tv_switch_bg_right"             android:onClick="turnRight" />      </LinearLayout>      <ListView         android:id="@+id/listView"         android:layout_width="match_parent"         android:layout_height="0dp"         android:layout_weight="9"         android:layout_gravity="center"         android:listSelector="@color/colorPrimaryDark"/> </LinearLayout>

上边的LinearLayout用于切换节目组，下边是ListView显示每个分组下的节目列表。这次布局就实现了，这是相当简单的。

２，实现播放

LiveActivityRel实现了播放功能，启动该Activity的时候传入媒体资源的地址mVideoUrl，然后启动Ijkplayer的播放功能

public void initVideo() {         // init player`         IjkMediaPlayer.loadLibrariesOnce(null);         IjkMediaPlayer.native_profileBegin("libijkplayer.so");         mVideoView.setVideoURI(Uri.parse(mVideoUrl));         mVideoView.setOnPreparedListener(new IMediaPlayer.OnPreparedListener() {             @Override             public void onPrepared(IMediaPlayer mp) {                 mp.setVolume(100, 100);                 mVideoView.start();             }         });          mVideoView.setOnInfoListener(new IMediaPlayer.OnInfoListener() {             @Override             public boolean onInfo(IMediaPlayer mp, int what, int extra) {                 switch (what) {                     case IjkMediaPlayer.MEDIA_INFO_BUFFERING_START:                         mLoadingLayout.setVisibility(View.VISIBLE);                         break;                     case IjkMediaPlayer.MEDIA_INFO_VIDEO_RENDERING_START:                     case IjkMediaPlayer.MEDIA_INFO_BUFFERING_END:                         mLoadingLayout.setVisibility(View.GONE);                         break;                 }                 return false;             }         });          mVideoView.setOnCompletionListener(new IMediaPlayer.OnCompletionListener() {             @Override             public void onCompletion(IMediaPlayer mp) {                 mLoadingLayout.setVisibility(View.VISIBLE);                 mVideoView.stopPlayback();                 mVideoView.release(true);                 mVideoView.setVideoURI(Uri.parse(mVideoUrl));             }         });          mVideoView.setOnErrorListener(new IMediaPlayer.OnErrorListener() {             @Override             public boolean onError(IMediaPlayer mp, int what, int extra) {                 if (++mRetryTimes > CONNECTION_TIMES) {                     new AlertDialog.Builder(LiveActivityRel.this)                             .setMessage("该频道媒体资源出现错误，节目暂时不能播放...")                             .setPositiveButton(R.string.VideoView_error_button,                                     new DialogInterface.OnClickListener() {                                         public void onClick(DialogInterface dialog, int whichButton) {                                             dialog.dismiss();                                             //LiveActivityRel.this.finish();                                         }                                     })                             .setCancelable(false)                             .show();                 } else {                     mVideoView.stopPlayback();                     mVideoView.release(true);                     mVideoView.setVideoURI(Uri.parse(mVideoUrl));                 }                 return false;             }         });      }

这里也是很简答的，首先进行库的加载和初始化，绑定各种事件，然后在setOnPreparedListener中启动播放。其余的功能主要是涉及到UI和数据解析。节目列表是一个JSON结构，在原来的项目是有API进行登录和节目列表获取的。为了方便本文直接把节目列表写死，同时启动的Activity设置为MainActivityOffline。

/*  * Copyright (C) 2016 hejunlin <hejunlin2013@gmail.com>  *  * Github:https://github.com/hejunlin2013/LivePlayback  *  * Licensed under the Apache License, Version 2.0 (the "License");  * you may not use this file except in compliance with the License.  * You may obtain a copy of the License at  *  *      http://www.apache.org/licenses/LICENSE-2.0  *  * Unless required by applicable law or agreed to in writing, software  * distributed under the License is distributed on an "AS IS" BASIS,  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  * See the License for the specific language governing permissions and  * limitations under the License.  */ package com.gxf.liveplay;  import android.app.Activity; import android.content.Context; import android.content.Intent; import android.content.SharedPreferences; import android.os.Bundle; import android.widget.Toast;  /**  * splash  * 启动登录检测  */ public class MainActivityOffline extends Activity {     private final int SPLASH_DISPLAY_LENGHT = 1000; // 两秒后进入系统     private boolean isUpdateChecked = false;     public void checkLogin(){         SharedPreferences userSettings = getSharedPreferences("auth", Context.MODE_PRIVATE);         final String lastVedioUrl = userSettings.getString("lastVedioUrl", "none");         final Toast toast = Toast.makeText(MainActivityOffline.this, "系统初始化失败...", Toast.LENGTH_SHORT);         // 开启一个子线程，进行网络操作，等待有返回结果，使用handler通知UI         new Thread(new Runnable() {             @Override             public void run() {                 try {                     PlayListCache.initPlayInfo(null,null);                     String url = lastVedioUrl;                     if (url.equals("none"))                         url = PlayListCache.playListMap.get(PlayListCache.playListMap.keySet().iterator().next());                     LiveActivityRel.activityStart(MainActivityOffline.this, url);                     MainActivityOffline.this.finish();                 } catch (Exception e) {                     toast.show();                     e.printStackTrace();                 }             }         }).start();     }     @Override     protected void onCreate(Bundle savedInstanceState) {         super.onCreate(savedInstanceState);         setContentView(R.layout.activity_main);         checkLogin();     } }

启动App在一个线程里去获取节目列表并缓存起来放在PlayListCache中，然后调用LiveActivityRel并传入一个默认的播放地址(首次启动)或者上次播放的地址。至于登录和HttpUtils中的代码(主要用于节目列表和登录控制)就不在赘述了，因为不属于本文的重点。

3，附上项目的代码

https://github.com/gongxufan/TvPlayer

THE END

PS：本项目中的播放源地址可能会失效，如需测试需要更改可用的播放源，具体代码在com.gxf.liveplay.HttpUtils#getOfflinePlayList，数据格式如下：

[   {     "group": "省内频道",     "list": [       {         "湖南都市": "http://220.248.175.231:6610/001/2/ch00000090990000001049/index.m3u8?virtualDomain=001.live_hls.zte.com"       },       {         "湖南经视": "http://220.248.175.230:6610/001/2/ch00000090990000001052/index.m3u8?virtualDomain=001.live_hls.zte.com"       }     ]   },   {     "group": "其他频道",     "list": [       {         "安徽卫视": "http://220.248.175.230:6610/001/2/ch00000090990000001024/index.m3u8?virtualDomain=001.live_hls.zte.com"       },       {         "北京卫视": "http://220.248.175.230:6610/001/2/ch00000090990000001025/index.m3u8?virtualDomain=001.live_hls.zte.com"       }     ]   },   {     "group": "高清频道",     "list": [       {         "CCTV1综合HD": "http://220.248.175.230:6610/001/2/ch00000090990000001075/index.m3u8?virtualDomain=001.live_hls.zte.com"       },       {         "湖南经视HD": "http://220.248.175.230:6610/001/2/ch00000090990000001080/index.m3u8?virtualDomain=001.live_hls.zte.com"       }     ]   },   {     "group": "央视频道",     "list": [       {         "CCTV1综合": "http://220.248.175.230:6610/001/2/ch00000090990000001075/index.m3u8?virtualDomain=001.live_hls.zte.com"       },       {         "CCTV证券": "http://220.248.175.230:6610/001/2/ch00000090990000001133/index.m3u8?virtualDomain=001.live_hls.zte.com"       }     ]   } ]