一个 TV app 的直播节目实例，包含各央视频道及卫视频道

LivePlayback

项目地址： hejunlin2013/LivePlayback

简介：一个 TV app 的直播节目实例，包含各央视频道及卫视频道

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传统电视直播节目,在 Android TV 上起着越来越重要的作用,央视,各地卫视,满足观众日益增长的多元化需求 看下效果图:

代码实现思路:

• 1、通过 RecycleView 为对应的节目 item,遥控器按键,可触发跳到对应的直播节目
• 2、用对 IjkPlayer 进行二次封装,并能用于播放视频源。
• 3、视频源 m3u8,可能存在失效,目前获取了一个比较稳定的视频源

代码实现：

• 主页面：Recycleview 对应 adapater
• 直播节目源
• 播放器
• 播放页处理

主页面：

/*
 * Copyright (C) 2016 hejunlin 
 * 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.
 */
public class MainActivity extends Activity {

    private MetroViewBorderImpl mMetroViewBorderImpl;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        mMetroViewBorderImpl = new MetroViewBorderImpl(this);
        mMetroViewBorderImpl.setBackgroundResource(R.drawable.border_color);
        loadRecyclerViewMenuItem();
    }

    private void loadRecyclerViewMenuItem() {
        RecyclerView recyclerView = (RecyclerView) findViewById(R.id.ry_menu_item);
        GridLayoutManager layoutManager = new GridLayoutManager(this, 1);
        layoutManager.setOrientation(LinearLayoutManager.VERTICAL);
        recyclerView.setLayoutManager(layoutManager);
        recyclerView.setFocusable(false);
        mMetroViewBorderImpl.attachTo(recyclerView);
        createOptionItemData(recyclerView, R.layout.detail_menu_item);
    }

    private void createOptionItemData(RecyclerView recyclerView, int id) {
        OptionItemAdapter adapter = new OptionItemAdapter(this, id);
        recyclerView.setAdapter(adapter);
        recyclerView.scrollToPosition(0);
    }
}

播放页：

/*
 * Copyright (C) 2016 hejunlin 
 * 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.
 */
public class LiveActivity extends Activity {

    private IjkVideoView mVideoView;
    private RelativeLayout mVideoViewLayout;
    private RelativeLayout mLoadingLayout;
    private TextView mLoadingText;
    private TextView mTextClock;
    private String mVideoUrl = "";
    private int mRetryTimes = 0;
    private static final int CONNECTION_TIMES = 5;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_live);
        mVideoUrl = getIntent().getStringExtra("url");
        mVideoView = (IjkVideoView) findViewById(R.id.videoview);
        mVideoViewLayout = (RelativeLayout) findViewById(R.id.fl_videoview);
        mLoadingLayout = (RelativeLayout) findViewById(R.id.rl_loading);
        mLoadingText = (TextView) findViewById(R.id.tv_load_msg);
        mTextClock = (TextView)findViewById(R.id.tv_time);
        mTextClock.setText(getDateFormate());
        mLoadingText.setText("节目加载中...");
        initVideo();
    }

    private String getDateFormate(){
        Calendar c = Calendar.getInstance();
        SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        String formattedDate = df.format(c.getTime());
        return formattedDate;
    }

    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) {
                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(LiveActivity.this)
                            .setMessage("节目暂时不能播放")
                            .setPositiveButton(R.string.VideoView_error_button,
                                    new DialogInterface.OnClickListener() {
                                        public void onClick(DialogInterface dialog, int whichButton) {
                                            LiveActivity.this.finish();
                                        }
                                    })
                            .setCancelable(false)
                            .show();
                } else {
                    mVideoView.stopPlayback();
                    mVideoView.release(true);
                    mVideoView.setVideoURI(Uri.parse(mVideoUrl));
                }
                return false;
            }
        });

    }

    @Override
    protected void onResume() {
        super.onResume();
    }

    @Override
    protected void onPause() {
        super.onPause();
    }

    @Override
    protected void onStop() {
        super.onStop();
        if (!mVideoView.isBackgroundPlayEnabled()) {
            mVideoView.stopPlayback();
            mVideoView.release(true);
            mVideoView.stopBackgroundPlay();
        }
        IjkMediaPlayer.native_profileEnd();
    }

    public static void activityStart(Context context, String url) {
        Intent intent = new Intent(context, LiveActivity.class);
        intent.putExtra("url", url);
        context.startActivity(intent);
    }

    @Override
    public void onConfigurationChanged(Configuration newConfig) {
        super.onConfigurationChanged(newConfig);
    }

}

播放器是用二次封装的 ijkplayer，从主页面传 url 到播放页面，关才 mediaplayer 相关，之前专门写了专题分析，mediaplayer 的状态可参考《Android Multimedia 框架总结（一）MediaPlayer 介绍之状态图及生命周期》 第三方播放器典型特点就是另起一个 mediaplayerservice，注意这是另外一个进程，为什么是另一个进程，可参见我的文章：MediaPlayer 的 C/S 模型。对于 ijkplayer 这个框架，因为做实例，才引入，不做评价，也不会去深究，满足基本播放需求就 ok。市场上有很多第三方播放框架，ijkplayer,vitamio,百度云播放等。

再看下播放页的播放 panel:

这里有几个点要注意 ：

• 为演示，并未对层级进行使用 FrameLayout,及 viewstub,include 等性能优化相关的，在实际商用项目中，建议写 xml 文件，尽可能遵循过少的层级，高级标签及 FrameLayout 等技巧。
• 所有的 size 切勿直接写死，用 android:layout_marginTop="@dimen/dimen_20dp"表示，string 值统一写到 string.xml 中，这些基本的规范，会让你提高不少效率。