diff --git a/app/lint.xml b/app/lint.xml
new file mode 100644
index 00000000..1a703bc5
--- /dev/null
+++ b/app/lint.xml
@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<lint>
+    <issue id="InvalidPackage">
+        <!-- we don't use javax.xml.stream -->
+        <ignore path="*/simple-xml-2.6.1.jar" />
+    </issue>
+</lint>
\ No newline at end of file
diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index deb1bcdf..9147c4f9 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -1,8 +1,8 @@
 <?xml version="1.0" encoding="utf-8"?>
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
-    xmlns:tools="http://schemas.android.com/tools"
-    package="org.solovyev.android.calculator"
-    android:installLocation="auto">
+          xmlns:tools="http://schemas.android.com/tools"
+          package="org.solovyev.android.calculator"
+          android:installLocation="auto">
 
     <uses-permission android:name="android.permission.INTERNET" />
     <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
@@ -25,7 +25,7 @@
         android:icon="@drawable/ic_launcher"
         android:label="@string/cpp_app_name"
         android:theme="@style/Cpp.Theme.Material"
-        tools:ignore="UnusedAttribute">
+        tools:ignore="GoogleAppIndexingWarning,UnusedAttribute">
 
         <meta-data
             android:name="com.google.android.gms.version"
@@ -212,6 +212,7 @@
 
         <!-- Google Analytics -->
         <receiver
+            tools:ignore="ExportedReceiver"
             android:name="com.google.android.gms.analytics.CampaignTrackingReceiver"
             android:enabled="true">
             <intent-filter>
@@ -220,6 +221,7 @@
         </receiver>
         <service android:name="com.google.android.gms.analytics.CampaignTrackingService" />
         <receiver
+            tools:ignore="ExportedReceiver"
             android:name="com.google.android.gms.analytics.AnalyticsReceiver"
             android:enabled="true">
             <intent-filter>
diff --git a/app/src/main/java/com/viewpagerindicator/CirclePageIndicator.java b/app/src/main/java/com/viewpagerindicator/CirclePageIndicator.java
index d9711b2a..1009b506 100644
--- a/app/src/main/java/com/viewpagerindicator/CirclePageIndicator.java
+++ b/app/src/main/java/com/viewpagerindicator/CirclePageIndicator.java
@@ -16,6 +16,7 @@
  */
 package com.viewpagerindicator;
 
+import android.annotation.SuppressLint;
 import android.content.Context;
 import android.content.res.Resources;
 import android.content.res.TypedArray;
@@ -278,6 +279,7 @@ public class CirclePageIndicator extends View implements PageIndicator {
         canvas.drawCircle(dX, dY, mRadius, mPaintFill);
     }
 
+    @SuppressLint("ClickableViewAccessibility")
     public boolean onTouchEvent(MotionEvent ev) {
         if (super.onTouchEvent(ev)) {
             return true;
diff --git a/app/src/main/java/org/solovyev/android/calculator/floating/FloatingCalculatorView.java b/app/src/main/java/org/solovyev/android/calculator/floating/FloatingCalculatorView.java
index 90db8575..5c973f3b 100644
--- a/app/src/main/java/org/solovyev/android/calculator/floating/FloatingCalculatorView.java
+++ b/app/src/main/java/org/solovyev/android/calculator/floating/FloatingCalculatorView.java
@@ -22,6 +22,7 @@
 
 package org.solovyev.android.calculator.floating;
 
+import android.annotation.SuppressLint;
 import android.content.Context;
 import android.content.SharedPreferences;
 import android.content.res.Resources;
@@ -80,6 +81,7 @@ public class FloatingCalculatorView {
             dd.getMetrics(dm);
         }
 
+        @SuppressLint("ClickableViewAccessibility")
         @Override
         public boolean onTouch(View v, MotionEvent event) {
             //noinspection deprecation
diff --git a/app/src/main/java/org/solovyev/android/calculator/plot/PlotDimensionsFragment.java b/app/src/main/java/org/solovyev/android/calculator/plot/PlotDimensionsFragment.java
index 9afbd80b..7636726f 100644
--- a/app/src/main/java/org/solovyev/android/calculator/plot/PlotDimensionsFragment.java
+++ b/app/src/main/java/org/solovyev/android/calculator/plot/PlotDimensionsFragment.java
@@ -19,16 +19,24 @@ import android.view.inputmethod.EditorInfo;
 import android.view.inputmethod.InputMethodManager;
 import android.widget.EditText;
 import android.widget.TextView;
-import butterknife.Bind;
-import butterknife.ButterKnife;
-import org.solovyev.android.calculator.*;
+
+import org.solovyev.android.calculator.App;
+import org.solovyev.android.calculator.AppComponent;
+import org.solovyev.android.calculator.BaseDialogFragment;
+import org.solovyev.android.calculator.BaseFragment;
+import org.solovyev.android.calculator.R;
 import org.solovyev.android.plotter.Check;
 import org.solovyev.android.plotter.Plot;
 import org.solovyev.android.plotter.Plotter;
 
+import java.util.Locale;
+
 import javax.annotation.Nonnull;
 import javax.inject.Inject;
 
+import butterknife.Bind;
+import butterknife.ButterKnife;
+
 public class PlotDimensionsFragment extends BaseDialogFragment
     implements TextView.OnEditorActionListener {
     private static final String ARG_BOUNDS = "arg-bounds";
@@ -184,7 +192,7 @@ public class PlotDimensionsFragment extends BaseDialogFragment
 
     private void setDimension(@NonNull EditText view, float value) {
         view.setOnEditorActionListener(this);
-        view.setText(String.format("%.2f", value));
+        view.setText(String.format(Locale.getDefault(), "%.2f", value));
     }
 
     private void tryClose() {