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Environment Configuration

Developing Environment

Turn on Java 8 support

If not enabled already, you also need to turn on Java 8 support in application's build.gradle, by adding the following to the android section:

android {
compileOptions {
sourceCompatibility JavaVersion.VERSION_1_8
targetCompatibility JavaVersion.VERSION_1_8

Add Uses Permission

Add relevant uses permissions in app/src/main/AndroidManifest.xml:

<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />

Allow HTTP Request

Starting with Android 9 (API level 28), cleartext support is disabled by default. There are 2 solutions:

(1) set ***targetSdkVersion*** under 27
(2) Add the attribute below in ***app/src/main/AndroidManifest.xml*** to indicate that the app intends to use cleartext HTTP:

Enable LargeHeap

P2P related application can be memory intensive, setting the optional android:largeHeap="true" flag in the AndroidManifest.xml file is recommended to ensure that your application has enough heap memory allocated.


Proguard Configuration

Please add the following code in

-dontwarn com.p2pengine.**
-keep class com.p2pengine.**{*;}
-keep interface com.p2pengine.**{*;}
-keep class com.cdnbye.libdc.**{*;}
-keep interface com.cdnbye.libdc.**{*;}
-keep class com.snapchat.djinni.**{*;}

Import SDK

Download SDK(version >= 3.5)

Download the latest version SDK swarmcloud.jar and datachannel.aar,then copy it to app/libs .

Besides add new dependencies in app/build.gradle as shown below:

dependencies {
implementation fileTree(dir: 'libs', include: ['*.aar', '*.jar'], exclude: [])
implementation("com.squareup.okhttp3:okhttp:3.12.13") // Or any okhttp newer version

Simulator may not work as expected, please test on real device.

Quick Start

We recommend calling P2pEngine.initEngine in the instance of the Application class right after the application is created.

Import P2pEngine

import com.p2pengine.sdk.P2pEngine

Initialize P2pEngine

class MyApplication : Application() {
override fun onCreate() {
val config = P2pConfig.Builder()
.trackerZone(TrackerZone.Europe) // Set HongKong or USA if you changed zone
P2pEngine.init(this, YOUR_TOKEN, config)

Where YOUR_TOKEN is your Customer ID. Please replace it by your own token obtained from console, click here for more information.


If the media segment is generated by multiple servers, please add this line:


Playback Address

When initializing a media player (or any other video player, ExoPlayer is highly recommended) instance, before passing it a URL, pass that URL through P2P Engine.

private void onPlay(){
val parsedUrl = P2pEngine.instance!!.parseStreamUrl(YOUR_STREAM)

Setup Player Interactor For Exoplayer

If your are using Exoplayer, it's recommended to setup PlayerInteractor for live streaming.

P2pEngine.instance?.setPlayerInteractor(object : PlayerInteractor() {
override fun onBufferedDuration(): Long {
// Exoplayer in milliseconds
return if (player != null) {
player!!.bufferedPosition - player!!.currentPosition
} else {


A completed example can be found here

Migrating from v2

Some major changes and enhancements of v3:

  • The package name is renamed from com.cdnbye. to com.p2pengine.
  • The minimum requirement of API level is now 21+ instead of 19+
  • The requirement of okhttp version is 4.5+
  • One of the gradle dependencies fastjson is replaced by gson :
// implementation ''   // Remove this dependency
implementation("") // Add this dependency
  • The APIs for Mp4/MPEG-Dash/FIle download are removed
  • Some fields of P2pConfig are removed, like "waitForPeer", "waitForPeerTimeout"

Troubleshooting Steps when P2P doesn't work

Click here