Added HTTPS request to get version data. Added APK flaor for github and fdroid.

app/build.gradle

@@ -14,12 +14,14 @@ android {
         testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
         vectorDrawables.useSupportLibrary = true
     }
+
     buildTypes {
         release {
             minifyEnabled true
             shrinkResources true
             proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
         }
+
         debug {
             multiDexEnabled true
 
@@ -34,10 +36,25 @@ android {
         // but continue the build even when errors are found:
         abortOnError false
     }
+
     compileOptions {
         sourceCompatibility JavaVersion.VERSION_1_8
         targetCompatibility JavaVersion.VERSION_1_8
     }
+
+    flavorDimensions "apkSource"
+    productFlavors {
+        github {
+            dimension "apkSource"
+            applicationIdSuffix ".github"
+
+        }
+
+        fdroid {
+            dimension "apkSource"
+            applicationIdSuffix ".fdroid"
+        }
+    }
 }
 
 ext {

app/src/main/java/org/schabi/newpipe/MainActivity.java

@@ -24,6 +24,7 @@ import android.content.Intent;
 import android.content.SharedPreferences;
 import android.content.pm.PackageManager;
 import android.net.Uri;
+import android.os.AsyncTask;
 import android.os.Bundle;
 import android.os.Handler;
 import android.os.Looper;
@@ -47,6 +48,8 @@ import android.widget.Button;
 import android.widget.ImageButton;
 import android.widget.TextView;
 
+import org.json.JSONException;
+import org.json.JSONObject;
 import org.schabi.newpipe.extractor.NewPipe;
 import org.schabi.newpipe.extractor.StreamingService;
 import org.schabi.newpipe.fragments.BackPressable;
@@ -61,6 +64,13 @@ import org.schabi.newpipe.util.ServiceHelper;
 import org.schabi.newpipe.util.StateSaver;
 import org.schabi.newpipe.util.ThemeHelper;
 
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStreamReader;
+import java.net.HttpURLConnection;
+import java.net.MalformedURLException;
+import java.net.URL;
+
 public class MainActivity extends AppCompatActivity {
     private static final String TAG = "MainActivity";
     public static final boolean DEBUG = !BuildConfig.BUILD_TYPE.equals("release");
@@ -80,6 +90,10 @@ public class MainActivity extends AppCompatActivity {
 
         ThemeHelper.setTheme(this, ServiceHelper.getSelectedServiceId(this));
 
+        if (BuildConfig.FLAVOR.equals("github")) {
+            new versionCheckTask().execute();
+        }
+
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_main);
 
@@ -409,4 +423,101 @@ public class MainActivity extends AppCompatActivity {
             NavigationHelper.gotoMainFragment(getSupportFragmentManager());
         }
     }
+
+    /**
+     * AsyncTask to check if there is a newer version of the github apk available or not.
+     * If there is a newer version we show a notification, informing the user. On tapping
+     * the notification, the user will be directed to download link.
+     */
+    private static class versionCheckTask extends AsyncTask<Void, Void, String> {
+
+        String newPipeApiUrl = "https://api.myjson.com/bins/19gx44";
+        int timeoutPeriod = 10000;
+
+        @Override
+        protected String doInBackground(Void... voids) {
+
+            String output;
+
+            HttpURLConnection connection = null;
+
+            try {
+
+                URL url = new URL(newPipeApiUrl);
+
+                connection = (HttpURLConnection) url.openConnection();
+                connection.setRequestMethod("GET");
+                connection.setConnectTimeout(timeoutPeriod);
+                connection.setReadTimeout(timeoutPeriod);
+                connection.setRequestProperty("Content-length", "0");
+                connection.setUseCaches(false);
+                connection.setAllowUserInteraction(false);
+                connection.connect();
+
+                int responseStatus = connection.getResponseCode();
+
+                switch (responseStatus) {
+
+                    case 200:
+                    case 201:
+                        BufferedReader bufferedReader
+                                = new BufferedReader(
+                                new InputStreamReader(connection.getInputStream()));
+
+                        StringBuilder stringBuilder = new StringBuilder();
+
+                        String line;
+
+                        while ((line = bufferedReader.readLine()) != null) {
+                            stringBuilder.append(line + "\n");
+                        }
+
+                        bufferedReader.close();
+                        output = stringBuilder.toString();
+
+                        return output;
+                }
+            } catch (MalformedURLException ex) {
+                ex.printStackTrace();
+            } catch (IOException ex) {
+                ex.printStackTrace();
+            } finally {
+                if (connection != null) {
+                    try {
+                        connection.disconnect();
+                    } catch (Exception ex) {
+                        ex.printStackTrace();
+                    }
+                }
+            }
+
+            return null;
+        }
+
+        @Override
+        protected void onPostExecute(String output) {
+
+            if (output != null) {
+
+                Log.i("output---", output);
+
+                try {
+                    JSONObject mainObject = new JSONObject(output);
+                    JSONObject flavoursObject = mainObject.getJSONObject("flavors");
+                    JSONObject githubObject = flavoursObject.getJSONObject("github");
+                    JSONObject githubStableObject = githubObject.getJSONObject("stable");
+
+                    String version = githubStableObject.getString("version");
+                    // String versionCode = githubStableObject.getString("version_code");
+                    String apkLocationUrl = githubStableObject.getString("apk");
+
+                    Log.i("jsonConvert---", version + "     " + apkLocationUrl);
+                } catch (JSONException ex) {
+                    ex.printStackTrace();
+                }
+            }
+        }
+    }
+
+
 }

build.gradle

@@ -6,7 +6,7 @@ buildscript {
         google()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:3.1.2'
+        classpath 'com.android.tools.build:gradle:3.1.4'
 
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files