Android video

• Description of the technology
• Requirements
• Video player connection
• Setup
• Editing manifest
• Usage
• Traffic
• Example
• Possible problems and their solutions

Description of the technology

FlockPlay technology for the Android platform is a proxy server and P2P module.

Requirements

Before you use the library, make sure that you have the correct version of the compiler JAVA - 1.6. or higher.

• The library has been developed for the platform Android 4.0 or higher.
• Currently it supports processor architectures - armeabi-v7a (armv7), ia32 (x86) and arm64-v8a (armv8).

Version of the compiler

Before you use the library, make sure that you have the correct version of the compiler JAVA - 1.6. or higher.

Setup

Next, you need to download the following library files. To avoid errors, use the recommended libs!

Name	Recommended version	JAR	armeabi	armeabi-v7a	x86	x86_64	arm64-v8a
android-async-http	1.4.4	android-async-http-1.4.4.jar	-	-	-	-	-
autobahn-ws	0.5.0	autobahn-0.5.0.jar	-	-	-	-	-
libjingle_peerconnection	3.52	libjingle_peerconnection.jar	-	libjingle_peerconnection_so.so	libjingle_peerconnection_so.so	-	-
android-flockplay	-	android-flockplay.jar	-	-	-	-	-

Now add the JAR files to the libs project and SO files in the folders libs/armeabi-v7a, libs/x86 and libs/arm64-v8a.

Next, add files to project build path.

Editing manifest

Add in AndroidManifest.xml file the following permissions:

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

and information about the current SDK:

<uses-sdk android:minSdkVersion="14" android:targetSdkVersion="21"/> 

Usage

First, fill the structure ru.inventos.flockplay.p2p.ProxyServer.Options. It has several fields:

• Options.tag - translation identifier.
• Options.key - key.

Next you have to implement interface and send object to server constructor.

public interface AbstractMediaPlayer {
    public int getCurrentPosition ();
    public boolean isPlaying();
}

Where:

public int getCurrentPosition();

returns current playback position in milliseconds.

Constructor interface:

public ProxyServer (ProxyServer.Options o, Context c,AbstractMediaPlayer p);

Example could look like this:

VideoView player = ...;
AbstractMediaPlayer abstractMediaPlayer = new AbstractMediaPlayer() {
    @Override
    public int getCurrentPosition() {
        return player.getCurrentPosition();
    }
    @Override
    public boolean isPlaying() {
        return player.isPlaying();
    }
};
ProxyServer server = new ProxyServer(ops,getContext(),abstractMediaPlayer);

After creating the server does not automatically start. Therefore, run it by:

public boolean start (int p)

The only argument is the port number. If the call returns false - then launch failed. Now the server is running is the last step - prepare URL playlist. For this purpose the method:

public android.net.Uri preparePlaylist (java.lang.String u)

The resulting object is passed to the video player.

In order to permanently shut down the server, use this method:

public void destroy (android.content.Context c)

Traffic

Using the information about the current internet connection (Wi-Fi, 4G or 3G / 2G) plugin can automatically disable the ability to serve the files. In order to globally block the uploading of files (data about the internet connection will not be affected by this flag), you must call the class ru.inventos.flockplay.p2p.ProxyServer:

public void setSendingDisabled (boolean f)

It should be noted that the possibility of a forced enable file uploading not provided.

Example

Using the server class with VideoView:

ExampleActivity.java

public class ExampleActivity extends Activity {

    private ProxyServer mProxyServer;
    private VideoView mVideoView;

    @Override
    public void onCreate (Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.example_layout);
        mVideoView = (VideoView)findViewById(R.id.video_view);
        ProxyServer.Options options = new ProxyServer.Options();
        options.tag = "github";
        options.key = "demo";
        AbstractMediaPlayer abstractMediaPlayer = new AbstractMediaPlayer() {
            @Override
            public int getCurrentPosition() {
                return mVideoView.getCurrentPosition();
            }

            @Override
            public boolean isPlaying() {
                return mVideoView.isPlaying();
            }
        };
        mProxyServer = new ProxyServer(options,this,abstractMediaPlayer);        
    }

    @Override    
    public void onStop () {
        mProxyServer.pause();
        super.onStop();
    }

    @Override
    public void onStart () {
        super.onStart();
        if (mProxyServer.start(8089)) {
            mVideoView.setVideoURI(mProxyServer.preparePlaylist("http://flockplay.com/test/playlist.m3u8"));
            mVideoView.requestFocus();
            mVideoView.start();
        }        
    }

    @Override
    protected void onDestroy() {
        mProxyServer.destroy(this);
        super.onDestroy();
    }

}

Possible problems and their solutions

• An error occurred while building the project in Android Studio: "Unable to execute DX"

Solution: Go to the "Project Structure" -> "Facets" -> "Packaging" -> Uncheck "Pre-dex external jars and Android library dependencies"