Correct for Lint errors and warnings

app/build.gradle

@@ -17,6 +17,16 @@ android {
             proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
         }
     }
+    lintOptions {
+        // set to true to turn off analysis progress reporting by lint
+        quiet false
+        // if true, stop the gradle build if errors are found
+        abortOnError true
+        // if true, only report errors
+        ignoreWarnings false
+        // project specific lint options
+        lintConfig new File(rootProject.projectDir, "lint.xml")
+    }
 }
 
 dependencies {

app/src/main/AndroidManifest.xml

@@ -2,6 +2,8 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     package="loop.ms.looptestuser">
 
+    <!-- Not visible to Google App indexer -->
+    <!--suppress GoogleAppIndexingWarning -->
     <application
         android:allowBackup="true"
         android:icon="@mipmap/ic_launcher"

app/src/main/java/loop/ms/looptestuser/MainActivity.java

@@ -11,6 +11,8 @@ import android.widget.Button;
 import android.widget.ImageView;
 import android.widget.TextView;
 
+import java.util.Locale;
+
 import ms.loop.loopsdk.api.LoopHttpError;
 import ms.loop.loopsdk.core.ILoopServiceCallback;
 import ms.loop.loopsdk.core.LoopSDK;
@@ -71,9 +73,9 @@ public class MainActivity extends AppCompatActivity implements SharedPreferences
                                 public void run(){
                                     checkboxImageView.setVisibility(View.VISIBLE);
 
-                                    userIdView.setText("Current User Id\n" + LoopSDK.userId + "\n\nTest Count");
+                                    userIdView.setText(String.format(Locale.US, "Current User Id\n%s\n\nTest Count", LoopSDK.userId));
                                     userIdView.setVisibility(View.VISIBLE);
-                                    profileCountView.setText(String.format("%.0f", score));
+                                    profileCountView.setText(String.format(Locale.US, "%.0f", score));
                                     profileCountView.setVisibility(View.VISIBLE);
                                 }
                             });

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

@@ -8,7 +8,7 @@
     <Button
         android:layout_width="match_parent"
         android:layout_height="50dp"
-        android:text="Get test profile"
+        android:text="@string/get_test_profile"
         android:layout_centerHorizontal="true"
         android:background="#208DED"
         android:textColor="#fff"
@@ -42,7 +42,7 @@
     <TextView
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
-        android:text="Current User Id:"
+        android:text="@string/current_user_id"
         android:layout_marginTop="20dp"
         android:textColor="#FF000000"
         android:textSize="20sp"

app/src/main/res/values-w820dp/dimens.xml

@@ -1,6 +0,0 @@
-<resources>
-    <!-- Example customization of dimensions originally defined in res/values/dimens.xml
-         (such as screen margins) for screens with more than 820dp of available width. This
-         would include 7" and 10" devices in landscape (~960dp and ~1280dp respectively). -->
-    <dimen name="activity_horizontal_margin">64dp</dimen>
-</resources>

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

@@ -1,6 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<resources>
-    <color name="colorPrimary">#3F51B5</color>
-    <color name="colorPrimaryDark">#303F9F</color>
-    <color name="colorAccent">#FF4081</color>
-</resources>

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

@@ -1,5 +0,0 @@
-<resources>
-    <!-- Default screen margins, per the Android Design guidelines. -->
-    <dimen name="activity_horizontal_margin">16dp</dimen>
-    <dimen name="activity_vertical_margin">16dp</dimen>
-</resources>

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

@@ -1,3 +1,5 @@
 <resources>
     <string name="app_name">Loop Test User</string>
+    <string name="get_test_profile">Get test profile</string>
+    <string name="current_user_id">Current User Id:</string>
 </resources>

lint.xml

@@ -0,0 +1,26 @@
+<lint>
+    <issue id="InvalidPackage">
+        <!-- due to an issue with okio, we need to exclude lint errors for it -->
+        <!-- http://stackoverflow.com/questions/35492259/lint-error-on-okio -->
+        <!-- https://github.com/square/okio/issues/58 -->
+        <ignore regexp=".*okio.*" />
+        
+        <!-- due to an issue with Apache Commons Math3, we need to exclude lint errors for it -->
+        <ignore regexp="org.apache.commons.math3.*" />
+    </issue>
+
+    <!-- Disable check for old api versions -->
+    <issue id="OldTargetApi" severity="ignore" />
+
+    <!-- Disable check for old versions of Gradle dependencies -->
+    <issue id="GradleDependency" severity="ignore" />
+
+    <!-- Disable check for 'center' attribute on API level 15 -->
+    <issue id="UnusedAttribute" severity="ignore" />
+
+    <!-- Disable check for drawable density -->
+    <issue id="IconLocation" severity="ignore" />
+
+    <!-- Disable check ImageView content description -->
+    <issue id="ContentDescription" severity="ignore" />
+</lint>