Added showLoading and hideLoading methods along with a package for classes for constants and utility methods (show loading dialog).

app/src/main/java/br/com/evologica/mvp/di/module/ApplicationModule.java

@@ -12,6 +12,7 @@ import br.com.evologica.mvp.data.prefs.AppPreferencesHelper;
 import br.com.evologica.mvp.data.prefs.PreferencesHelper;
 import br.com.evologica.mvp.di.ApplicationContext;
 import br.com.evologica.mvp.di.PreferenceInfo;
+import br.com.evologica.mvp.utils.AppConstants;
 import dagger.Module;
 import dagger.Provides;
 import uk.co.chrisjenx.calligraphy.CalligraphyConfig;
@@ -55,7 +56,7 @@ public class ApplicationModule {
     @Provides
     @PreferenceInfo
     String providePreferenceName(){
-        return "whatever";
+        return AppConstants.PREF_NAME;
     }
 
     @Provides

app/src/main/java/br/com/evologica/mvp/ui/base/BaseActivity.java

 package br.com.evologica.mvp.ui.base;
 
+import android.app.ProgressDialog;
 import android.content.Context;
 import android.os.Bundle;
 import android.support.annotation.Nullable;
@@ -10,6 +11,7 @@ import br.com.evologica.mvp.MvpApp;
 import br.com.evologica.mvp.di.component.ActivityComponent;
 import br.com.evologica.mvp.di.component.DaggerActivityComponent;
 import br.com.evologica.mvp.di.module.ActivityModule;
+import br.com.evologica.mvp.utils.CommonUtils;
 import uk.co.chrisjenx.calligraphy.CalligraphyContextWrapper;
 
 /**
@@ -20,6 +22,8 @@ public class BaseActivity extends AppCompatActivity implements MvpView, BaseFrag
 
     private ActivityComponent mActivityComponent;
 
+    private ProgressDialog mProgressDialog;
+
     @Override
     protected void onCreate(@Nullable Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
@@ -50,12 +54,15 @@ public class BaseActivity extends AppCompatActivity implements MvpView, BaseFrag
 
     @Override
     public void showLoading() {
-
+        hideLoading();
+        mProgressDialog = CommonUtils.showLoadingDialog(this);
     }
 
     @Override
     public void hideLoading() {
-
+        if (mProgressDialog != null && mProgressDialog.isShowing()) {
+            mProgressDialog.cancel();
+        }
     }
 
     @Override

app/src/main/java/br/com/evologica/mvp/utils/AppConstants.java

+package br.com.evologica.mvp.utils;
+
+/**
+ * Created by marcussales on 02/03/2017.
+ */
+
+public final class AppConstants {
+
+    public static final String PREF_NAME = "pref";
+
+    private AppConstants(){
+
+    }
+}

app/src/main/java/br/com/evologica/mvp/utils/CommonUtils.java

+package br.com.evologica.mvp.utils;
+
+import android.app.ProgressDialog;
+import android.content.Context;
+import android.graphics.Color;
+import android.graphics.drawable.ColorDrawable;
+
+import br.com.evologica.mvp.R;
+
+/**
+ * Created by marcussales on 02/03/2017.
+ */
+
+public final class CommonUtils {
+
+    private static final String TAG = "CommonUtils";
+
+    private CommonUtils() {
+        // This utility class is not publicly instantiable
+    }
+
+    public static ProgressDialog showLoadingDialog(Context context) {
+        ProgressDialog progressDialog = new ProgressDialog(context);
+        progressDialog.show();
+        if (progressDialog.getWindow() != null) {
+            progressDialog.getWindow().setBackgroundDrawable(new ColorDrawable(Color.TRANSPARENT));
+        }
+        progressDialog.setContentView(R.layout.progress_dialog);
+        progressDialog.setIndeterminate(true);
+        progressDialog.setCancelable(true);
+        progressDialog.setCanceledOnTouchOutside(false);
+        return progressDialog;
+    }
+}

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

+<?xml version="1.0" encoding="utf-8"?><!--
+  ~ Copyright (C) 2017 MINDORKS NEXTGEN PRIVATE LIMITED
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~     https://mindorks.com/license/apache-v2
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License
+  -->
+
+<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="wrap_content"
+    android:layout_height="wrap_content"
+    android:layout_gravity="center"
+    android:background="@android:color/transparent">
+
+    <ProgressBar
+        android:id="@+id/pb_loading"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_centerInParent="true"
+        android:progressDrawable="@color/black_effective" />
+</RelativeLayout>
\ No newline at end of file