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" } ] } ]