[BKNDLSS-26295] We need to update the guide for login with google plus sdk (#508)

* [BKNDLSS-26295] We need to update the guide for login with google plus sdk

* Updated BackendlessCollectionUsage example

* Updated DataService example

* Fixed code formatting for BackendlessCollectionUsage example

* Removed EndlessMatchMaker

* Updated filedemo example

* Code reorganization for ToDoDemo example

* Updated RolesDemo example

* Updated UserService example

* Fixed code organization

Author: lycaron

samples/BackendlessCollectionUsage/app/build.gradle

@@ -1,12 +1,12 @@
 apply plugin: 'com.android.application'
 
 android {
-    compileSdkVersion 28
-    buildToolsVersion "29.0.2"
+    compileSdkVersion 30
+    buildToolsVersion "30.0.2"
     defaultConfig {
-        applicationId "com.example.backendlesscollectionusage"
-        minSdkVersion 21
-        targetSdkVersion 28
+        applicationId "com.examples.backendless.backendlesscollectionusage"
+        minSdkVersion 30
+        targetSdkVersion 30
         versionCode 1
         versionName "1.0"
         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
@@ -28,14 +28,17 @@ android {
 
 
 dependencies {
-    implementation 'com.android.support:support-compat:28.0.0'
-    implementation 'com.android.support:appcompat-v7:28.0.0'
+    // please, set the current version of backendless sdk for Android here.
+    implementation 'com.backendless:backendless:6.3.1'
+    implementation 'androidx.core:core:1.6.0'
+    implementation 'androidx.appcompat:appcompat:1.3.1'
 
     implementation fileTree(dir: 'libs', include: ['*.jar'])
-    implementation 'androidx.appcompat:appcompat:1.1.0'
-    implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
+    implementation 'androidx.appcompat:appcompat:1.3.1'
+    implementation 'androidx.constraintlayout:constraintlayout:2.1.0'
     testImplementation 'junit:junit:4.12'
-    androidTestImplementation 'androidx.test:runner:1.2.0'
-    androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0'
-    implementation 'androidx.recyclerview:recyclerview:1.0.0'
+    androidTestImplementation 'androidx.test:runner:1.4.0'
+    androidTestImplementation 'androidx.test.espresso:espresso-core:3.4.0'
+    androidTestImplementation 'androidx.test.ext:junit:1.1.3'
+    implementation 'androidx.recyclerview:recyclerview:1.2.1'
 }

samples/BackendlessCollectionUsage/app/libs/backendless-5.3.2.jar

@@ -1,4 +1,4 @@
-package com.example.backendlesscollectionusage;
+package com.examples.backendless.backendlesscollectionusage;
 
 import android.content.Context;
 
@@ -15,13 +15,13 @@
  *
  * @see <a href="http://d.android.com/tools/testing">Testing documentation</a>
  */
-@RunWith(AndroidJUnit4.class)
+@RunWith( AndroidJUnit4.class)
 public class ExampleInstrumentedTest {
     @Test
     public void useAppContext() {
         // Context of the app under test.
         Context appContext = InstrumentationRegistry.getInstrumentation().getTargetContext();
 
-        assertEquals("com.example.backendlesscollectionusage", appContext.getPackageName());
+        assertEquals("com.examples.backendless.backendlesscollectionusage", appContext.getPackageName());
     }
 }

samples/BackendlessCollectionUsage/app/libs/backendless-data-collection-1.0.jar

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
-    package="com.example.backendlesscollectionusage">
+    package="com.examples.backendless.backendlesscollectionusage">
 
     <uses-permission android:name="android.permission.INTERNET" />
 
@@ -11,7 +11,7 @@
         android:roundIcon="@mipmap/ic_launcher_round"
         android:supportsRtl="true"
         android:theme="@style/AppTheme">
-        <activity android:name=".MainActivity">
+        <activity android:name="com.examples.backendless.backendlesscollectionusage.MainActivity">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
 

samples/BackendlessCollectionUsage/app/src/androidTest/java/com/example/backendlesscollectionusage/ExampleInstrumentedTest.java renamed to samples/BackendlessCollectionUsage/app/src/androidTest/java/com/examples/backendless/backendlesscollectionusage/ExampleInstrumentedTest.java

@@ -1,5 +1,5 @@
 
-package com.example.backendlesscollectionusage;
+package com.examples.backendless.backendlesscollectionusage;
 
 import com.backendless.Backendless;
 import com.backendless.async.callback.AsyncCallback;
@@ -9,7 +9,6 @@
 import java.util.Date;
 import java.util.List;
 
-
 public class Car implements BackendlessDataCollection.Identifiable<Car>
 {
   private String model;
@@ -20,7 +19,8 @@ public class Car implements BackendlessDataCollection.Identifiable<Car>
   private Date created;
 
   @Override
-  public void setObjectId(String s) {
+  public void setObjectId( String s )
+  {
     this.objectId = objectId;
   }
 
@@ -64,7 +64,6 @@ public Date getCreated()
     return created;
   }
 
-                                                    
   public Car save()
   {
     return Backendless.Data.of( Car.class ).save( this );