mainactivity.java

// Getting resource from server.
new getInfo(this).execute("GET", "http://someurl.com/resource");

// Extending and using the ServerComm
public class getInfo extends ServerComm {
  	private static final String TAG = "getInfo";
		
		public getInfo(Context context) {
			super.currentContext = context;
		}
		
		protected void onPostExecute(String result) {
			Log.d(TAG, result);
		}
		
	}

ServerComm.java

import java.io.BufferedInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.URL;

import javax.net.ssl.HttpsURLConnection;
import javax.net.ssl.KeyManagerFactory;
import javax.net.ssl.SSLContext;
import javax.net.ssl.TrustManagerFactory;

import org.apache.http.util.ByteArrayBuffer;

import java.security.KeyManagementException;
import java.security.KeyStore;
import java.security.KeyStoreException;
import java.security.NoSuchAlgorithmException;
import java.security.SecureRandom;
import java.security.cert.CertificateException;

import android.content.Context;
import android.content.res.Resources.NotFoundException;
import android.os.AsyncTask;
import android.util.Log;

public class ServerComm extends AsyncTask<String, Void, String> {
  
	private static final String TAG = "NetworkActivities";
	
	Context currentContext;

	@Override
	protected String doInBackground(String... options) {
		
		// Passphrase for Self Signed sslcert
		char[] passphrase = "passphrase".toCharArray();

		try {
			
			// Loading custom keystore
			KeyStore ksTrust = KeyStore.getInstance("BKS");
			ksTrust.load(currentContext.getResources().openRawResource(R.raw.sslcert), passphrase);
			
			TrustManagerFactory tmf = TrustManagerFactory.getInstance(KeyManagerFactory.getDefaultAlgorithm());
			
			tmf.init(ksTrust);
			
			// Create a SSLContext with the certificate
			SSLContext sslContext = SSLContext.getInstance("TLS");
			sslContext.init(null, tmf.getTrustManagers(), new SecureRandom());
			
			// Create a HTTPS connection
			URL commandURL = new URL(options[1]);
			HttpsURLConnection conn = (HttpsURLConnection) commandURL.openConnection();
			
			// Add the SSLContext to the connection
			conn.setSSLSocketFactory(sslContext.getSocketFactory());
			
			InputStream is = conn.getInputStream();
			
			BufferedInputStream bis = new BufferedInputStream(is);
			ByteArrayBuffer baf = new ByteArrayBuffer(50);
			
			int current = 0;
			while((current = bis.read()) != -1){
				baf.append((byte)current);
			}
			
			return new String(baf.toByteArray());
			
		} catch (KeyStoreException e) {
			Log.d(TAG, "KeystoreException");
			Log.d(TAG, "Exception: "+e.getMessage());
		} catch (NoSuchAlgorithmException e) {
			Log.d(TAG, "NoSuchAlgorithmException");
			Log.d(TAG, "Exception: "+e.getMessage());
		} catch (CertificateException e) {
			Log.d(TAG, "CertificateException");
			Log.d(TAG, "Exception: "+e.getMessage());
		} catch (NotFoundException e) {
			Log.d(TAG, "NotFoundException");
			Log.d(TAG, "Exception: "+e.getMessage());
		} catch (IOException e) {
			Log.d(TAG, "IOException");
			Log.d(TAG, "Exception: "+e.getMessage());
		} catch (KeyManagementException e) {
			Log.d(TAG, "KeyManagementException");
			Log.d(TAG, "Exception: "+e.getMessage());
		}
		
		return null;
	}

}