近年來(lái)，Android TV的迅速發(fā)展，傳統(tǒng)的有線電視受到較大的沖擊，在TV上用戶同樣也可以看到各個(gè)有線電視的直播頻道，相對(duì)于手機(jī)，這種直播節(jié)目，體驗(yàn)效果更佳，尤其是一樣賽事節(jié)目，大屏幕看得才夠痛快，還可以邀幾好友一起欣賞。今天將介紹構(gòu)建一個(gè)TV app的直播節(jié)目實(shí)例,此實(shí)例上傳到Github: https://github.com/hejunlin2013/LivePlayback 喜歡可以star。Agenda如下：

效果圖

代碼實(shí)現(xiàn)：

主頁(yè)面：Recycleview對(duì)應(yīng)Adapater

直播節(jié)目源

播放器

播放頁(yè)處理

播放頁(yè)的播放panel:

先看下效果圖:主界面：

這里寫圖片描述

這里寫圖片描述

CCTV-1:

這里寫圖片描述湖南衛(wèi)視：

這里寫圖片描述CCTV-第一劇場(chǎng)：

這里寫圖片描述CCTV-15(音樂(lè))：

這里寫圖片描述

CCTV-14(少兒)：

這里寫圖片描述CCTV-13(新聞)：

這里寫圖片描述CCTV-12(社會(huì)與法)：

這里寫圖片描述CCTV-11(戲曲)：

這里寫圖片描述CCTV-10(科教)：

這里寫圖片描述CCTV-9(紀(jì)錄)：

這里寫圖片描述CCTV-8(電視劇)：

這里寫圖片描述CCTV-第一劇場(chǎng)：

這里寫圖片描述CCTV-15:

這里寫圖片描述

代碼實(shí)現(xiàn)：

主頁(yè)面：Recycleview對(duì)應(yīng)adapater

直播節(jié)目源

播放器

播放頁(yè)處理主頁(yè)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);

}

}

播放頁(yè)：

/*

* 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("節(jié)目加載中...");

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("節(jié)目暫時(shí)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);

}

}

播放器是用二次封裝的ijkplayer，從主頁(yè)面?zhèn)鱱rl到播放頁(yè)面，關(guān)才mediaplayer相關(guān)，之前專門寫了專題分析，mediaplayer的狀態(tài)可參考《Android Multimedia框架總結(jié)(一)MediaPlayer介紹之狀態(tài)圖及生命周期》

第三方播放器典型特點(diǎn)就是另起一個(gè)mediaplayerservice，注意這是另外一個(gè)進(jìn)程，為什么是另一個(gè)進(jìn)程，可參見(jiàn)我的文章：MediaPlayer的C/S模型。對(duì)于ijkplayer這個(gè)框架，因?yàn)樽鰧?shí)例，才引入，不做評(píng)價(jià)，也不會(huì)去深究，滿足基本播放需求就ok。市場(chǎng)上有很多第三方播放框架，ijkplayer,vitamio,百度云播放等。

再看下播放頁(yè)的播放panel:

android:layout_width="match_parent"

android:layout_height="match_parent"

android:background="#22000000"

android:orientation="vertical">

android:id="@+id/fl_videoview"

android:layout_width="match_parent"

android:layout_height="match_parent"

android:background="@color/colorBlack">

android:id="@+id/videoview"

android:layout_width="match_parent"

android:layout_height="match_parent"

android:layout_centerInParent="true"

android:background="@color/colorBlack">

android:id="@+id/rl_loading"

android:layout_width="match_parent"

android:layout_height="match_parent"

android:background="#de262a3b">

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" />

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" />

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:background="@color/player_panel_background_color">

android:id="@+id/tv_title"

android:layout_width="wrap_content"

android:layout_height="60dp"

android:textSize="24dp"

android:text="Android TV開(kāi)發(fā)總結(jié)(六)構(gòu)建一個(gè)TV app的直播節(jié)目實(shí)例"

android:layout_centerVertical="true"

android:layout_marginTop="18dp"

android:textColor="@color/white"/>

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"/>

這里有幾個(gè)點(diǎn)要注意：

為演示，并未對(duì)層級(jí)進(jìn)行使用FrameLayout,及viewstub,include等性能優(yōu)化相關(guān)的，在實(shí)際商用項(xiàng)目中，建議寫xml文件，盡可能遵循過(guò)少的層級(jí)，高級(jí)標(biāo)簽及FrameLayout等技巧。

所有的size切勿直接寫死，用 android:layout_marginTop="@dimen/dimen_20dp"表示，string值統(tǒng)一寫到string.xml中，這些基本的規(guī)范，會(huì)讓你提高不少效率。

總結(jié)

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