Added a DialogFragment for the list of Realms

Author: kunall17

app/src/main/java/com/zulip/android/activities/RealmDialog.java

@@ -0,0 +1,68 @@
+package com.zulip.android.activities;
+
+import android.app.AlertDialog;
+import android.app.Dialog;
+import android.app.ProgressDialog;
+import android.content.Context;
+import android.content.DialogInterface;
+import android.content.Intent;
+import android.os.Bundle;
+import android.support.annotation.NonNull;
+import android.support.v4.app.DialogFragment;
+import android.util.Log;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.AdapterView;
+import android.widget.ArrayAdapter;
+import android.widget.ListView;
+import android.widget.Toast;
+
+import com.zulip.android.R;
+import com.zulip.android.ZulipApp;
+
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.HashSet;
+import java.util.List;
+
+public class RealmDialog extends DialogFragment {
+    private ZulipApp app;
+    private ArrayAdapter<String> realmsAdapter;
+    private Context context;
+
+    static RealmDialog newInstance() {
+        return new RealmDialog();
+    }
+
+    public RealmDialog() {
+    }
+
+    @NonNull
+    @Override
+    public Dialog onCreateDialog(Bundle savedInstanceState) {
+        AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
+        LayoutInflater inflater = getActivity().getLayoutInflater();
+        builder.setTitle(R.string.realm_title);
+        View rootView = inflater.inflate(R.layout.realm_dialog_list, null);
+        List<String> realmsList = new ArrayList<>();
+        context = getActivity();
+        app = ZulipApp.get();
+        ListView listView = (ListView) rootView.findViewById(R.id.realmListView);
+        realmsList = new ArrayList<String>(app.serverStringSet);
+        realmsAdapter = new ArrayAdapter<String>(context, android.R.layout.simple_list_item_1, realmsList);
+        listView.setAdapter(realmsAdapter);
+        builder.setView(rootView)
+                .setPositiveButton(R.string.realm_add, new DialogInterface.OnClickListener() {
+                    @Override
+                    public void onClick(DialogInterface dialog, int id) {
+                    }
+                })
+                .setNegativeButton(android.R.string.cancel, new DialogInterface.OnClickListener() {
+                    public void onClick(DialogInterface dialog, int id) {
+                        RealmDialog.this.getDialog().cancel();
+                    }
+                });
+        return builder.create();
+    }
+}

app/src/main/java/com/zulip/android/activities/ZulipActivity.java

@@ -1241,6 +1241,10 @@ public void onClick(
                 break;
             case R.id.today:
                 doNarrow(new NarrowFilterToday());
+            case R.id.menu_realm:
+                FragmentManager fm = getSupportFragmentManager();
+                RealmDialog dialogFragment = RealmDialog.newInstance();
+                dialogFragment.show(fm, "fragment_realm");
                 break;
             case R.id.logout:
                 logout();

app/src/main/res/layout/realm_dialog_list.xml

@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="utf-8"?>
+<ListView xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:id="@+id/realmListView"
+    android:layout_height="match_parent"
+    android:padding="16dp"
+    tools:context=".activities.RealmDialog">
+</ListView>

app/src/main/res/values/strings.xml

@@ -80,4 +80,5 @@
     <string name="person_error">No person specified.</string>
     <string name="no_message_error">No message written.</string>
     <string name="realm_title">Realms</string>
-</resources>
+    <string name="realm_add">Add Realm</string>
+</resources>