[流媒體]ijkplayer 播放器，android平臺使用說明

ijkplayer github 地址

ijkplayer 編譯

編譯能夠參考官方說明

簡要步驟說明：

1. 將代碼下載到本地

git clone https://github.com/Bilibili/ijkplayer

1. 設定ndk環境

   1. 下載對應平臺的ndk工具包，官網地址

   2. 設置ndk的編譯環境，由於我使用的是mac，就直接

      export ANDROID_NDK=/ndk-path

2. 初始化ijkplayer爲android編譯環境

   ./init-android.sh

3. 編譯ffmpeg以前準備
   由於ijkplayer仍是依賴於ffmpeg的一些功能，因此在進行ijkplayer的編譯以前，首先須要知足ffmpeg的編譯條件。最主要的就是yasm的安裝，以mac爲例，安裝yasm

   brew install yasm

4. 開始編譯ffmpeg

   cd android/contrib
   ./compile-ffmpeg.sh clean
   ./compile-ffmpeg.sh all

5. 編譯ijkplayer

   ./compile-ijk.sh all

ijkplayer 的使用

使用前的說明

在完成上面的編譯過程以後，能夠在ijkplayer中發現一個android工程，簡要的目錄以下：

+---/path-to-ijkplayer/android/ijkplayer
    |
    +---ijkplayer-arm64
    |
    +---ijkplayer-armv5
    |
    +---ijkplayer-armv7a
    |
    +---ijkplayer-x86
    |
    +---ijkplayer-x86-64
    |
    +---ijkplayer-java
    |
    +---ijkplayer-exo
    |
    +---tools

如上目錄爲ijkplayer在android平臺上須要用到的庫，從命名上能夠看出，以上modules中包含了這幾類：

1. ijkplayer-arm*和ijkplayer-x86*，實現了不一樣平臺下的so庫。
2. ijkplayer-java和ijkplayer-exo, 爲封裝好的ijkplayer的java層api。
3. tools，編譯須要用到的腳本程序

如何使用

1. 新建android工程，命名爲：ijkplayer-demo。
2. 講上文中表示出來的文件夾所有拷貝到新建的android工程目錄下。

3. 修改新建工程中的settings.gradle:

   include ':ijkplayer-armv5', ':ijkplayer-x86_64'
   include ':ijkplayer-armv7a'
   include ':ijkplayer-arm64'
   include ':ijkplayer-x86'
   
   include ':ijkplayer-java'
   include ':ijkplayer-exo'
   
   include ':app'

4. 修改/path-to-ijkplayer-demp/build.gradle

   // Top-level build file where you can add configuration options common to all sub-projects/modules.
   
   buildscript {
       repositories {
           jcenter()
       }
       dependencies {
           classpath 'com.android.tools.build:gradle:2.3.3'
   
           // NOTE: Do not place your application dependencies here; they belong
           // in the individual module build.gradle files
   
       }
   }
   
   allprojects {
       repositories {
           jcenter()
       }
   }
   
   ext {
       compileSdkVersion = 23
       buildToolsVersion = "23.0.3"
   
       targetSdkVersion = 23
   
       versionCode = 800000
       versionName = "0.8.0"
   }
   
   task clean(type: Delete) {
       delete rootProject.buildDir
   }

5. 修改/path-to-ijkplayer-demp/app/build.gradle

   apply plugin: 'com.android.application'
   
   android {
       compileSdkVersion 25
       buildToolsVersion "25.0.1"
       defaultConfig {
           applicationId "com.test.ijkplayer.hankun.ijkplayer_test"
           minSdkVersion 21
           targetSdkVersion 25
           versionCode 1
           versionName "1.0"
           testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
       }
       buildTypes {
           release {
               minifyEnabled false
               proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
           }
       }
   }
   
   dependencies {
       compile fileTree(include: ['*.jar'], dir: 'libs')
       androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {
           exclude group: 'com.android.support', module: 'support-annotations'
       })
       compile 'com.android.support:appcompat-v7:25.1.1'
       compile 'com.android.support.constraint:constraint-layout:1.0.2'
       testCompile 'junit:junit:4.12'
   
       compile project(':ijkplayer-java')
   
       compile project(':ijkplayer-arm64')
       compile project(':ijkplayer-armv5')
       compile project(':ijkplayer-armv7a')
       compile project(':ijkplayer-x86')
       compile project(':ijkplayer-x86_64')
   }

6. 給app添加權限

   AndroidManifest.xml

<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.WAKE_LOCK" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
```

1. app的佈局文件

   <?xml version="1.0" encoding="utf-8"?>
   <android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
       xmlns:app="http://schemas.android.com/apk/res-auto"
       xmlns:tools="http://schemas.android.com/tools"
       android:layout_width="match_parent"
       android:layout_height="match_parent"
       tools:context="com.test.ijkplayer.hankun.ijkplayer_test.MainActivity">
       <RelativeLayout
           android:layout_width="368dp"
           android:layout_height="495dp"
           tools:layout_editor_absoluteY="8dp"
           tools:layout_editor_absoluteX="8dp">
   
           <Button
               android:id="@+id/button_prepare"
               android:layout_width="wrap_content"
               android:layout_height="wrap_content"
               android:text="start"
               android:layout_alignParentTop="true"
               android:layout_alignParentStart="true" />
   
           <TextureView
               android:id="@+id/show_screen"
               android:layout_width="400dp"
               android:layout_height="200dp"
               android:layout_below="@+id/button_prepare"
               />
       </RelativeLayout>
   
   </android.support.constraint.ConstraintLayout>

2. MainActivity代碼

   package com.test.ijkplayer.hankun.ijkplayer_test;
   
   import android.content.Context;
   import android.graphics.SurfaceTexture;
   import android.net.Uri;
   import android.support.v7.app.AppCompatActivity;
   import android.os.Bundle;
   import android.view.Surface;
   import android.view.TextureView;
   import android.view.View;
   import android.widget.Button;
   
   import tv.danmaku.ijk.media.player.IMediaPlayer;
   import tv.danmaku.ijk.media.player.IjkMediaPlayer;
   
   public class MainActivity extends AppCompatActivity {
   
       private String source_url = "rtsp://192.168.1.106:8554/test.mkv";
       private Context _ctx = this;
       public IjkMediaPlayer player = null;
   
       @Override
       protected void onCreate(Bundle savedInstanceState) {
           super.onCreate(savedInstanceState);
           setContentView(R.layout.activity_main);
   
           player = new IjkMediaPlayer();
   
           TextureView tv = (TextureView)findViewById(R.id.show_screen);
           tv.setSurfaceTextureListener(new TextureView.SurfaceTextureListener() {
               @Override
               public void onSurfaceTextureAvailable(SurfaceTexture surface, int width, int height) {
                   try {
                       player.setSurface(new Surface(surface));
                   } catch (Exception e) {
                       e.printStackTrace();
                   }
               }
   
               @Override
               public void onSurfaceTextureSizeChanged(SurfaceTexture surface, int width, int height) {
   
               }
   
               @Override
               public boolean onSurfaceTextureDestroyed(SurfaceTexture surface) {
                   return false;
               }
   
               @Override
               public void onSurfaceTextureUpdated(SurfaceTexture surface) {
   
               }
           });
   
           Button btn_prepare = (Button) findViewById(R.id.button_prepare);
           btn_prepare.setOnClickListener(new View.OnClickListener() {
               @Override
               public void onClick(View v) {
                   // init player
                   IjkMediaPlayer.loadLibrariesOnce(null);
                   IjkMediaPlayer.native_profileBegin("libijkplayer.so");
   
                   player.setOnPreparedListener(mPreparedListener);
                   try {
                       player.setDataSource(_ctx, Uri.parse(source_url));
                       player.prepareAsync();
                   } catch (Exception e) {
                       e.printStackTrace();
                   }
               }
           });
   
       }
   
       IMediaPlayer.OnPreparedListener mPreparedListener = new IMediaPlayer.OnPreparedListener() {
           @Override
           public void onPrepared(IMediaPlayer mp) {
               player.start();
           }
       };
   
   }

到這裏，就完成了一個最簡單的ijkplayer的demo。剩下的就是認真看ijkplayer的實現了。