Adds AppCenter config.

app/build.gradle

@@ -1,3 +1,12 @@
+Properties properties = new Properties()
+def propertiesFile = project.rootProject.file('local.properties')
+if (propertiesFile.exists()) {
+    properties.load(propertiesFile.newDataInputStream())
+}
+def appCenterLocalSecret = properties.getProperty('appCenter.localSecret')
+def appCenterEnvSecret = System.getenv('APPCENTER_SECRET')
+def appCenterSecret = appCenterLocalSecret != null ? appCenterLocalSecret : appCenterEnvSecret != null ? appCenterEnvSecret : ""
+
 apply plugin: 'com.android.application'
 
 android {
@@ -10,6 +19,7 @@ android {
         targetSdkVersion 29
         versionCode 1
         versionName "1.0"
+        buildConfigField "String", "APPCENTER_SECRET", "\"${appCenterSecret}\""
 
         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
     }
@@ -23,6 +33,10 @@ android {
 }
 
 dependencies {
+    def appCenterSdkVersion = '3.3.0'
+    implementation "com.microsoft.appcenter:appcenter-analytics:${appCenterSdkVersion}"
+    implementation "com.microsoft.appcenter:appcenter-crashes:${appCenterSdkVersion}"
+
     implementation fileTree(dir: "libs", include: ["*.jar"])
     implementation 'androidx.appcompat:appcompat:1.2.0'
     implementation 'com.google.android.material:material:1.2.0'

app/src/main/java/com/majinnaibu/monstercards/MainActivity.java

@@ -9,12 +9,23 @@ import androidx.navigation.NavController;
 import androidx.navigation.Navigation;
 import androidx.navigation.ui.AppBarConfiguration;
 import androidx.navigation.ui.NavigationUI;
+import com.microsoft.appcenter.AppCenter;
+import com.microsoft.appcenter.analytics.Analytics;
+import com.microsoft.appcenter.crashes.Crashes;
 
 public class MainActivity extends AppCompatActivity {
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
+        if (BuildConfig.APPCENTER_SECRET != null && !"".equals(BuildConfig.APPCENTER_SECRET)) {
+            AppCenter.start(
+                    getApplication(),
+                    BuildConfig.APPCENTER_SECRET,
+                    Analytics.class,
+                    Crashes.class
+            );
+        }
         setContentView(R.layout.activity_main);
         BottomNavigationView navView = findViewById(R.id.nav_view);
         // Passing each menu ID as a set of Ids because each