Infinite Precision using BigDecimal

- Moved to using BigDecimal
- Replaced Deprecated Methods/Classes

README.md

@@ -20,7 +20,7 @@ This app is just one piece of a bigger series of apps. You can find the rest of
 <img alt="App image" src="fastlane/metadata/android/en-US/images/phoneScreenshots/app_3.jpg" width="30%">
 </div>
 
-</br>
+<br>
 It contains a couple UI and unit tests, they can be ran with the following instructions.
 
 <h3>Running Espresso UI tests</h3>

app/build.gradle

@@ -61,9 +61,10 @@ dependencies {
     implementation 'com.simplemobiletools:commons:5.28.23'
     implementation 'me.grantland:autofittextview:0.2.1'
 
-    testImplementation 'junit:junit:4.12'
+    testImplementation 'androidx.test.ext:junit:1.1.1'
     testImplementation 'org.robolectric:robolectric:3.8'
 
+    androidTestImplementation 'androidx.test.ext:junit:1.1.1'
     androidTestImplementation 'androidx.annotation:annotation:1.0.0'
     androidTestImplementation 'androidx.test:runner:1.1.0-beta02'
     androidTestImplementation 'androidx.test:rules:1.1.0-beta02'

app/src/androidTest/java/com/simplemobiletools/calculator/MainActivityTest.java

@@ -1,7 +1,7 @@
 package com.simplemobiletools.calculator;
 
 import androidx.test.rule.ActivityTestRule;
-import androidx.test.runner.AndroidJUnit4;
+import androidx.test.ext.junit.runners.AndroidJUnit4;
 
 import com.simplemobiletools.calculator.activities.MainActivity;
 

app/src/androidTest/java/com/simplemobiletools/calculator/PercentTests.kt

@@ -6,7 +6,7 @@ import androidx.test.espresso.assertion.ViewAssertions
 import androidx.test.espresso.matcher.ViewMatchers
 import androidx.test.espresso.matcher.ViewMatchers.withId
 import androidx.test.rule.ActivityTestRule
-import androidx.test.runner.AndroidJUnit4
+import androidx.test.ext.junit.runners.AndroidJUnit4
 import com.simplemobiletools.calculator.activities.MainActivity
 import org.junit.Rule
 import org.junit.Test
@@ -74,11 +74,11 @@ class PercentTests {
     }
 
     private fun press(id: Int) {
-        Espresso.onView(ViewMatchers.withId(id)).perform(ViewActions.click())
+        Espresso.onView(withId(id)).perform(ViewActions.click())
     }
 
     private fun longPress(id: Int) {
-        Espresso.onView(ViewMatchers.withId(id)).perform(ViewActions.longClick())
+        Espresso.onView(withId(id)).perform(ViewActions.longClick())
     }
 
     private fun checkResult(desired: String) {

app/src/main/AndroidManifest.xml

@@ -5,7 +5,7 @@
     android:installLocation="auto">
 
     <uses-permission
-        android:name="android.permission.USE_FINGERPRINT"
+        android:name="android.permission.USE_BIOMETRIC"
         tools:node="remove" />
 
     <application
@@ -15,15 +15,242 @@
         android:label="@string/app_launcher_name"
         android:roundIcon="@mipmap/ic_launcher"
         android:theme="@style/AppTheme">
-
         <activity
             android:name=".activities.SplashActivity"
             android:theme="@style/SplashTheme" />
 
+        <activity-alias
+            android:name=".activities.SplashActivity.Grey_black"
+            android:enabled="false"
+            android:icon="@mipmap/ic_launcher_grey_black"
+            android:roundIcon="@mipmap/ic_launcher_grey_black"
+            android:targetActivity=".activities.SplashActivity">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity-alias>
+        <activity-alias
+            android:name=".activities.SplashActivity.Blue_grey"
+            android:enabled="false"
+            android:icon="@mipmap/ic_launcher_blue_grey"
+            android:roundIcon="@mipmap/ic_launcher_blue_grey"
+            android:targetActivity=".activities.SplashActivity">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity-alias>
+        <activity-alias
+            android:name=".activities.SplashActivity.Brown"
+            android:enabled="false"
+            android:icon="@mipmap/ic_launcher_brown"
+            android:roundIcon="@mipmap/ic_launcher_brown"
+            android:targetActivity=".activities.SplashActivity">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity-alias>
+        <activity-alias
+            android:name=".activities.SplashActivity.Deep_orange"
+            android:enabled="false"
+            android:icon="@mipmap/ic_launcher_deep_orange"
+            android:roundIcon="@mipmap/ic_launcher_deep_orange"
+            android:targetActivity=".activities.SplashActivity">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity-alias>
+        <activity-alias
+            android:name=".activities.SplashActivity.Orange"
+            android:enabled="true"
+            android:icon="@mipmap/ic_launcher"
+            android:roundIcon="@mipmap/ic_launcher"
+            android:targetActivity=".activities.SplashActivity">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity-alias>
+        <activity-alias
+            android:name=".activities.SplashActivity.Amber"
+            android:enabled="false"
+            android:icon="@mipmap/ic_launcher_amber"
+            android:roundIcon="@mipmap/ic_launcher_amber"
+            android:targetActivity=".activities.SplashActivity">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity-alias>
+        <activity-alias
+            android:name=".activities.SplashActivity.Yellow"
+            android:enabled="false"
+            android:icon="@mipmap/ic_launcher_yellow"
+            android:roundIcon="@mipmap/ic_launcher_yellow"
+            android:targetActivity=".activities.SplashActivity">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity-alias>
+        <activity-alias
+            android:name=".activities.SplashActivity.Lime"
+            android:enabled="false"
+            android:icon="@mipmap/ic_launcher_lime"
+            android:roundIcon="@mipmap/ic_launcher_lime"
+            android:targetActivity=".activities.SplashActivity">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity-alias>
+        <activity-alias
+            android:name=".activities.SplashActivity.Light_green"
+            android:enabled="false"
+            android:icon="@mipmap/ic_launcher_light_green"
+            android:roundIcon="@mipmap/ic_launcher_light_green"
+            android:targetActivity=".activities.SplashActivity">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity-alias>
+        <activity-alias
+            android:name=".activities.SplashActivity.Green"
+            android:enabled="false"
+            android:icon="@mipmap/ic_launcher_green"
+            android:roundIcon="@mipmap/ic_launcher_green"
+            android:targetActivity=".activities.SplashActivity">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity-alias>
+        <activity-alias
+            android:name=".activities.SplashActivity.Teal"
+            android:enabled="false"
+            android:icon="@mipmap/ic_launcher_teal"
+            android:roundIcon="@mipmap/ic_launcher_teal"
+            android:targetActivity=".activities.SplashActivity">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity-alias>
+        <activity-alias
+            android:name=".activities.SplashActivity.Cyan"
+            android:enabled="false"
+            android:icon="@mipmap/ic_launcher_cyan"
+            android:roundIcon="@mipmap/ic_launcher_cyan"
+            android:targetActivity=".activities.SplashActivity">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity-alias>
+        <activity-alias
+            android:name=".activities.SplashActivity.Light_blue"
+            android:enabled="false"
+            android:icon="@mipmap/ic_launcher_light_blue"
+            android:roundIcon="@mipmap/ic_launcher_light_blue"
+            android:targetActivity=".activities.SplashActivity">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity-alias>
+        <activity-alias
+            android:name=".activities.SplashActivity.Blue"
+            android:enabled="false"
+            android:icon="@mipmap/ic_launcher_blue"
+            android:roundIcon="@mipmap/ic_launcher_blue"
+            android:targetActivity=".activities.SplashActivity">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity-alias>
+        <activity-alias
+            android:name=".activities.SplashActivity.Indigo"
+            android:enabled="false"
+            android:icon="@mipmap/ic_launcher_indigo"
+            android:roundIcon="@mipmap/ic_launcher_indigo"
+            android:targetActivity=".activities.SplashActivity">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity-alias>
+        <activity-alias
+            android:name=".activities.SplashActivity.Deep_purple"
+            android:enabled="false"
+            android:icon="@mipmap/ic_launcher_deep_purple"
+            android:roundIcon="@mipmap/ic_launcher_deep_purple"
+            android:targetActivity=".activities.SplashActivity">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity-alias>
+        <activity-alias
+            android:name=".activities.SplashActivity.Purple"
+            android:enabled="false"
+            android:icon="@mipmap/ic_launcher_purple"
+            android:roundIcon="@mipmap/ic_launcher_purple"
+            android:targetActivity=".activities.SplashActivity">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity-alias>
+        <activity-alias
+            android:name=".activities.SplashActivity.Pink"
+            android:enabled="false"
+            android:icon="@mipmap/ic_launcher_pink"
+            android:roundIcon="@mipmap/ic_launcher_pink"
+            android:targetActivity=".activities.SplashActivity">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity-alias>
+        <activity-alias
+            android:name=".activities.SplashActivity.Red"
+            android:enabled="false"
+            android:icon="@mipmap/ic_launcher_red"
+            android:roundIcon="@mipmap/ic_launcher_red"
+            android:targetActivity=".activities.SplashActivity">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity-alias>
+
         <activity
             android:name=".activities.MainActivity"
             android:screenOrientation="portrait" />
-
         <activity
             android:name=".activities.WidgetConfigureActivity"
             android:screenOrientation="portrait"
@@ -32,27 +259,22 @@
                 <action android:name="android.appwidget.action.APPWIDGET_CONFIGURE" />
             </intent-filter>
         </activity>
-
         <activity
             android:name=".activities.SettingsActivity"
             android:label="@string/settings"
             android:parentActivityName=".activities.MainActivity" />
-
         <activity
             android:name="com.simplemobiletools.commons.activities.AboutActivity"
             android:label="@string/about"
             android:parentActivityName=".activities.MainActivity" />
-
         <activity
             android:name="com.simplemobiletools.commons.activities.LicenseActivity"
             android:label="@string/third_party_licences"
             android:parentActivityName="com.simplemobiletools.commons.activities.AboutActivity" />
-
         <activity
             android:name="com.simplemobiletools.commons.activities.CustomizationActivity"
             android:label="@string/customize_colors"
             android:parentActivityName=".activities.SettingsActivity" />
-
         <activity
             android:name="com.simplemobiletools.commons.activities.FAQActivity"
             android:label="@string/frequently_asked_questions"
@@ -69,251 +291,6 @@
                 android:name="android.appwidget.provider"
                 android:resource="@xml/widget_info" />
         </receiver>
-
-        <activity-alias
-            android:name=".activities.SplashActivity.Red"
-            android:enabled="false"
-            android:icon="@mipmap/ic_launcher_red"
-            android:roundIcon="@mipmap/ic_launcher_red"
-            android:targetActivity=".activities.SplashActivity">
-
-            <intent-filter>
-                <action android:name="android.intent.action.MAIN" />
-                <category android:name="android.intent.category.LAUNCHER" />
-            </intent-filter>
-        </activity-alias>
-
-        <activity-alias
-            android:name=".activities.SplashActivity.Pink"
-            android:enabled="false"
-            android:icon="@mipmap/ic_launcher_pink"
-            android:roundIcon="@mipmap/ic_launcher_pink"
-            android:targetActivity=".activities.SplashActivity">
-
-            <intent-filter>
-                <action android:name="android.intent.action.MAIN" />
-                <category android:name="android.intent.category.LAUNCHER" />
-            </intent-filter>
-        </activity-alias>
-
-        <activity-alias
-            android:name=".activities.SplashActivity.Purple"
-            android:enabled="false"
-            android:icon="@mipmap/ic_launcher_purple"
-            android:roundIcon="@mipmap/ic_launcher_purple"
-            android:targetActivity=".activities.SplashActivity">
-
-            <intent-filter>
-                <action android:name="android.intent.action.MAIN" />
-                <category android:name="android.intent.category.LAUNCHER" />
-            </intent-filter>
-        </activity-alias>
-
-        <activity-alias
-            android:name=".activities.SplashActivity.Deep_purple"
-            android:enabled="false"
-            android:icon="@mipmap/ic_launcher_deep_purple"
-            android:roundIcon="@mipmap/ic_launcher_deep_purple"
-            android:targetActivity=".activities.SplashActivity">
-
-            <intent-filter>
-                <action android:name="android.intent.action.MAIN" />
-                <category android:name="android.intent.category.LAUNCHER" />
-            </intent-filter>
-        </activity-alias>
-
-        <activity-alias
-            android:name=".activities.SplashActivity.Indigo"
-            android:enabled="false"
-            android:icon="@mipmap/ic_launcher_indigo"
-            android:roundIcon="@mipmap/ic_launcher_indigo"
-            android:targetActivity=".activities.SplashActivity">
-
-            <intent-filter>
-                <action android:name="android.intent.action.MAIN" />
-                <category android:name="android.intent.category.LAUNCHER" />
-            </intent-filter>
-        </activity-alias>
-
-        <activity-alias
-            android:name=".activities.SplashActivity.Blue"
-            android:enabled="false"
-            android:icon="@mipmap/ic_launcher_blue"
-            android:roundIcon="@mipmap/ic_launcher_blue"
-            android:targetActivity=".activities.SplashActivity">
-
-            <intent-filter>
-                <action android:name="android.intent.action.MAIN" />
-                <category android:name="android.intent.category.LAUNCHER" />
-            </intent-filter>
-        </activity-alias>
-
-        <activity-alias
-            android:name=".activities.SplashActivity.Light_blue"
-            android:enabled="false"
-            android:icon="@mipmap/ic_launcher_light_blue"
-            android:roundIcon="@mipmap/ic_launcher_light_blue"
-            android:targetActivity=".activities.SplashActivity">
-
-            <intent-filter>
-                <action android:name="android.intent.action.MAIN" />
-                <category android:name="android.intent.category.LAUNCHER" />
-            </intent-filter>
-        </activity-alias>
-
-        <activity-alias
-            android:name=".activities.SplashActivity.Cyan"
-            android:enabled="false"
-            android:icon="@mipmap/ic_launcher_cyan"
-            android:roundIcon="@mipmap/ic_launcher_cyan"
-            android:targetActivity=".activities.SplashActivity">
-
-            <intent-filter>
-                <action android:name="android.intent.action.MAIN" />
-                <category android:name="android.intent.category.LAUNCHER" />
-            </intent-filter>
-        </activity-alias>
-
-        <activity-alias
-            android:name=".activities.SplashActivity.Teal"
-            android:enabled="false"
-            android:icon="@mipmap/ic_launcher_teal"
-            android:roundIcon="@mipmap/ic_launcher_teal"
-            android:targetActivity=".activities.SplashActivity">
-
-            <intent-filter>
-                <action android:name="android.intent.action.MAIN" />
-                <category android:name="android.intent.category.LAUNCHER" />
-            </intent-filter>
-        </activity-alias>
-
-        <activity-alias
-            android:name=".activities.SplashActivity.Green"
-            android:enabled="false"
-            android:icon="@mipmap/ic_launcher_green"
-            android:roundIcon="@mipmap/ic_launcher_green"
-            android:targetActivity=".activities.SplashActivity">
-
-            <intent-filter>
-                <action android:name="android.intent.action.MAIN" />
-                <category android:name="android.intent.category.LAUNCHER" />
-            </intent-filter>
-        </activity-alias>
-
-        <activity-alias
-            android:name=".activities.SplashActivity.Light_green"
-            android:enabled="false"
-            android:icon="@mipmap/ic_launcher_light_green"
-            android:roundIcon="@mipmap/ic_launcher_light_green"
-            android:targetActivity=".activities.SplashActivity">
-
-            <intent-filter>
-                <action android:name="android.intent.action.MAIN" />
-                <category android:name="android.intent.category.LAUNCHER" />
-            </intent-filter>
-        </activity-alias>
-
-        <activity-alias
-            android:name=".activities.SplashActivity.Lime"
-            android:enabled="false"
-            android:icon="@mipmap/ic_launcher_lime"
-            android:roundIcon="@mipmap/ic_launcher_lime"
-            android:targetActivity=".activities.SplashActivity">
-
-            <intent-filter>
-                <action android:name="android.intent.action.MAIN" />
-                <category android:name="android.intent.category.LAUNCHER" />
-            </intent-filter>
-        </activity-alias>
-
-        <activity-alias
-            android:name=".activities.SplashActivity.Yellow"
-            android:enabled="false"
-            android:icon="@mipmap/ic_launcher_yellow"
-            android:roundIcon="@mipmap/ic_launcher_yellow"
-            android:targetActivity=".activities.SplashActivity">
-
-            <intent-filter>
-                <action android:name="android.intent.action.MAIN" />
-                <category android:name="android.intent.category.LAUNCHER" />
-            </intent-filter>
-        </activity-alias>
-
-        <activity-alias
-            android:name=".activities.SplashActivity.Amber"
-            android:enabled="false"
-            android:icon="@mipmap/ic_launcher_amber"
-            android:roundIcon="@mipmap/ic_launcher_amber"
-            android:targetActivity=".activities.SplashActivity">
-
-            <intent-filter>
-                <action android:name="android.intent.action.MAIN" />
-                <category android:name="android.intent.category.LAUNCHER" />
-            </intent-filter>
-        </activity-alias>
-
-        <activity-alias
-            android:name=".activities.SplashActivity.Orange"
-            android:enabled="true"
-            android:icon="@mipmap/ic_launcher"
-            android:roundIcon="@mipmap/ic_launcher"
-            android:targetActivity=".activities.SplashActivity">
-            <intent-filter>
-                <action android:name="android.intent.action.MAIN" />
-                <category android:name="android.intent.category.LAUNCHER" />
-            </intent-filter>
-        </activity-alias>
-
-        <activity-alias
-            android:name=".activities.SplashActivity.Deep_orange"
-            android:enabled="false"
-            android:icon="@mipmap/ic_launcher_deep_orange"
-            android:roundIcon="@mipmap/ic_launcher_deep_orange"
-            android:targetActivity=".activities.SplashActivity">
-
-            <intent-filter>
-                <action android:name="android.intent.action.MAIN" />
-                <category android:name="android.intent.category.LAUNCHER" />
-            </intent-filter>
-        </activity-alias>
-
-        <activity-alias
-            android:name=".activities.SplashActivity.Brown"
-            android:enabled="false"
-            android:icon="@mipmap/ic_launcher_brown"
-            android:roundIcon="@mipmap/ic_launcher_brown"
-            android:targetActivity=".activities.SplashActivity">
-
-            <intent-filter>
-                <action android:name="android.intent.action.MAIN" />
-                <category android:name="android.intent.category.LAUNCHER" />
-            </intent-filter>
-        </activity-alias>
-
-        <activity-alias
-            android:name=".activities.SplashActivity.Blue_grey"
-            android:enabled="false"
-            android:icon="@mipmap/ic_launcher_blue_grey"
-            android:roundIcon="@mipmap/ic_launcher_blue_grey"
-            android:targetActivity=".activities.SplashActivity">
-
-            <intent-filter>
-                <action android:name="android.intent.action.MAIN" />
-                <category android:name="android.intent.category.LAUNCHER" />
-            </intent-filter>
-        </activity-alias>
-
-        <activity-alias
-            android:name=".activities.SplashActivity.Grey_black"
-            android:enabled="false"
-            android:icon="@mipmap/ic_launcher_grey_black"
-            android:roundIcon="@mipmap/ic_launcher_grey_black"
-            android:targetActivity=".activities.SplashActivity">
-
-            <intent-filter>
-                <action android:name="android.intent.action.MAIN" />
-                <category android:name="android.intent.category.LAUNCHER" />
-            </intent-filter>
-        </activity-alias>
     </application>
+
 </manifest>

app/src/main/kotlin/com/simplemobiletools/calculator/activities/MainActivity.kt

@@ -7,11 +7,11 @@ import android.view.Menu
 import android.view.MenuItem
 import android.view.View
 import android.view.WindowManager
-import com.simplemobiletools.calculator.BuildConfig
 import com.simplemobiletools.calculator.R
 import com.simplemobiletools.calculator.extensions.config
 import com.simplemobiletools.calculator.extensions.updateViewColors
 import com.simplemobiletools.calculator.helpers.*
+import com.simplemobiletools.calculator.BuildConfig
 import com.simplemobiletools.commons.extensions.*
 import com.simplemobiletools.commons.helpers.LICENSE_AUTOFITTEXTVIEW
 import com.simplemobiletools.commons.helpers.LICENSE_ESPRESSO
@@ -20,6 +20,7 @@ import com.simplemobiletools.commons.models.FAQItem
 import com.simplemobiletools.commons.models.Release
 import kotlinx.android.synthetic.main.activity_main.*
 import me.grantland.widget.AutofitHelper
+import java.math.BigDecimal
 
 class MainActivity : SimpleActivity(), Calculator {
     private var storedTextColor = 0
@@ -155,8 +156,8 @@ class MainActivity : SimpleActivity(), Calculator {
     }
 
     // used only by Robolectric
-    override fun setValueDouble(d: Double) {
+    override fun setValueBigDecimal(d: BigDecimal) {
-        calc.setValue(Formatter.doubleToString(d))
+        calc.setValue(Formatter.bigDecimalToString(d))
         calc.lastKey = DIGIT
     }
 

app/src/main/kotlin/com/simplemobiletools/calculator/activities/SettingsActivity.kt

@@ -11,6 +11,7 @@ import com.simplemobiletools.commons.extensions.updateTextColors
 import com.simplemobiletools.commons.helpers.IS_CUSTOMIZING_COLORS
 import kotlinx.android.synthetic.main.activity_settings.*
 import java.util.*
+import kotlin.system.exitProcess
 
 class SettingsActivity : SimpleActivity() {
 
@@ -50,7 +51,7 @@ class SettingsActivity : SimpleActivity() {
         settings_use_english_holder.setOnClickListener {
             settings_use_english.toggle()
             config.useEnglish = settings_use_english.isChecked
-            System.exit(0)
+            exitProcess(0)
         }
     }
 

app/src/main/kotlin/com/simplemobiletools/calculator/helpers/Calculator.kt

@@ -1,11 +1,12 @@
 package com.simplemobiletools.calculator.helpers
 
 import android.content.Context
+import java.math.BigDecimal
 
 interface Calculator {
     fun setValue(value: String, context: Context)
 
-    fun setValueDouble(d: Double)
+    fun setValueBigDecimal(d: BigDecimal)
 
     fun setFormula(value: String, context: Context)
 }

app/src/main/kotlin/com/simplemobiletools/calculator/helpers/CalculatorImpl.kt

@@ -5,6 +5,7 @@ import android.util.Log
 import com.simplemobiletools.calculator.R
 import com.simplemobiletools.calculator.operation.OperationFactory
 import com.simplemobiletools.commons.extensions.toast
+import java.math.BigDecimal
 
 class CalculatorImpl(calculator: Calculator, val context: Context) {
     var displayedNumber: String? = null
@@ -15,8 +16,8 @@ class CalculatorImpl(calculator: Calculator, val context: Context) {
 
     private var isFirstOperation = false
     private var resetValue = false
-    private var baseValue = 0.0
+    private var baseValue: BigDecimal = BigDecimal.ZERO
-    private var secondValue = 0.0
+    private var secondValue: BigDecimal = BigDecimal.ZERO
 
     init {
         resetValues()
@@ -32,8 +33,8 @@ class CalculatorImpl(calculator: Calculator, val context: Context) {
     }
 
     private fun resetValues() {
-        baseValue = 0.0
+        baseValue = BigDecimal.ZERO
-        secondValue = 0.0
+        secondValue = BigDecimal.ZERO
         resetValue = false
         lastOperation = ""
         displayedNumber = ""
@@ -61,7 +62,7 @@ class CalculatorImpl(calculator: Calculator, val context: Context) {
             sign == "√" -> setFormula(sign + first)
             sign == "!" -> setFormula(first + sign)
             sign.isNotEmpty() -> {
-                if (secondValue == 0.0 && sign == "/") {
+                if (secondValue.compareTo(BigDecimal.ZERO) == 0 && sign == "/") {
                     context.toast(context.getString(R.string.formula_divide_by_zero_error))
                 }
 
@@ -83,16 +84,16 @@ class CalculatorImpl(calculator: Calculator, val context: Context) {
             return str
         }
 
-        val doubleValue = Formatter.stringToDouble(str)
+        val doubleValue = Formatter.stringToBigDecimal(str)
         return doubleValue.format()
     }
 
-    private fun updateResult(value: Double) {
+    private fun updateResult(value: BigDecimal) {
         setValue(value.format())
         baseValue = value
     }
 
-    private fun getDisplayedNumberAsDouble() = Formatter.stringToDouble(displayedNumber!!)
+    private fun getDisplayedNumberAsDouble() = Formatter.stringToBigDecimal(displayedNumber!!)
 
     fun handleResult() {
         secondValue = getDisplayedNumberAsDouble()

app/src/main/kotlin/com/simplemobiletools/calculator/helpers/Formatter.kt

@@ -1,11 +1,12 @@
 package com.simplemobiletools.calculator.helpers
 
+import java.math.BigDecimal
 import java.text.DecimalFormat
 import java.text.DecimalFormatSymbols
 import java.util.*
 
 object Formatter {
-    fun doubleToString(d: Double): String {
+    fun bigDecimalToString(d: BigDecimal): String {
         val symbols = DecimalFormatSymbols(Locale.US)
         symbols.decimalSeparator = '.'
         symbols.groupingSeparator = ','
@@ -17,7 +18,7 @@ object Formatter {
         return formatter.format(d)
     }
 
-    fun stringToDouble(str: String) = str.replace(",", "").toDouble()
+    fun stringToBigDecimal(str: String): BigDecimal = BigDecimal(str.replace(",", ""))
 }
 
-fun Double.format(): String = Formatter.doubleToString(this)
+fun BigDecimal.format(): String = Formatter.bigDecimalToString(this)

app/src/main/kotlin/com/simplemobiletools/calculator/helpers/MyWidgetProvider.kt

@@ -12,8 +12,8 @@ import com.simplemobiletools.calculator.R
 import com.simplemobiletools.calculator.activities.MainActivity
 import com.simplemobiletools.calculator.extensions.config
 import com.simplemobiletools.commons.extensions.applyColorFilter
-import com.simplemobiletools.commons.extensions.setBackgroundColor
 import com.simplemobiletools.commons.extensions.setText
+import java.math.BigDecimal
 
 class MyWidgetProvider : AppWidgetProvider(), Calculator {
     companion object {
@@ -85,8 +85,7 @@ class MyWidgetProvider : AppWidgetProvider(), Calculator {
     }
 
     override fun onReceive(context: Context, intent: Intent) {
-        val action = intent.action
+        when (val action = intent.action) {
-        when (action) {
             DECIMAL, ZERO, ONE, TWO, THREE, FOUR, FIVE, SIX, SEVEN, EIGHT, NINE, EQUALS, CLEAR, RESET, PLUS, MINUS, MULTIPLY, DIVIDE, PERCENT, POWER, ROOT, FACTORIAL -> myAction(action, context)
             else -> super.onReceive(context, intent)
         }
@@ -125,7 +124,7 @@ class MyWidgetProvider : AppWidgetProvider(), Calculator {
         }
     }
 
-    override fun setValueDouble(d: Double) {
+    override fun setValueBigDecimal(d: BigDecimal) {
     }
 
     override fun setFormula(value: String, context: Context) {

app/src/main/kotlin/com/simplemobiletools/calculator/operation/DivideOperation.kt

@@ -2,14 +2,15 @@ package com.simplemobiletools.calculator.operation
 
 import com.simplemobiletools.calculator.operation.base.BinaryOperation
 import com.simplemobiletools.calculator.operation.base.Operation
+import java.math.BigDecimal
 
-class DivideOperation(baseValue: Double, secondValue: Double) : BinaryOperation(baseValue, secondValue), Operation {
+class DivideOperation(baseValue: BigDecimal, secondValue: BigDecimal) : BinaryOperation(baseValue, secondValue), Operation {
 
-    override fun getResult(): Double {
+    override fun getResult(): BigDecimal {
-        var result = 0.0
+        return if (secondValue.compareTo(BigDecimal.ZERO) == 0) {
-        if (secondValue != 0.0) {
+            BigDecimal.ZERO
-            result = baseValue / secondValue
+        } else {
+            baseValue.divide(secondValue)
         }
-        return result
     }
 }

app/src/main/kotlin/com/simplemobiletools/calculator/operation/FactorialOperation.kt

@@ -2,19 +2,20 @@ package com.simplemobiletools.calculator.operation
 
 import com.simplemobiletools.calculator.operation.base.Operation
 import com.simplemobiletools.calculator.operation.base.UnaryOperation
+import java.math.BigDecimal
 
-class FactorialOperation(value: Double) : UnaryOperation(value), Operation {
+class FactorialOperation(value: BigDecimal) : UnaryOperation(value), Operation {
 
-    override fun getResult(): Double{
+    override fun getResult(): BigDecimal {
-        var result = 1.0
+        return if (value.compareTo(BigDecimal.ZERO) == 0 || value.compareTo(BigDecimal.ONE) == 0 ){
-        if (value==0.0 || value==1.0){
+            BigDecimal.ONE
-            return result
+        } else{
-        }else{
+            var result = BigDecimal.ONE
-            var base = value.toInt()
+            val base = value.toInt()
             for(i in 1..base){
-                result *= i
+                result = result.multiply(BigDecimal(i))
             }
+            result
         }
-        return result
     }
 }

app/src/main/kotlin/com/simplemobiletools/calculator/operation/MinusOperation.kt

@@ -2,8 +2,9 @@ package com.simplemobiletools.calculator.operation
 
 import com.simplemobiletools.calculator.operation.base.BinaryOperation
 import com.simplemobiletools.calculator.operation.base.Operation
+import java.math.BigDecimal
 
-class MinusOperation(baseValue: Double, secondValue: Double) : BinaryOperation(baseValue, secondValue), Operation {
+class MinusOperation(baseValue: BigDecimal, secondValue: BigDecimal) : BinaryOperation(baseValue, secondValue), Operation {
 
-    override fun getResult() = baseValue - secondValue
+    override fun getResult(): BigDecimal = baseValue.subtract(secondValue)
 }

app/src/main/kotlin/com/simplemobiletools/calculator/operation/MultiplyOperation.kt

@@ -2,8 +2,9 @@ package com.simplemobiletools.calculator.operation
 
 import com.simplemobiletools.calculator.operation.base.BinaryOperation
 import com.simplemobiletools.calculator.operation.base.Operation
+import java.math.BigDecimal
 
-class MultiplyOperation(baseValue: Double, secondValue: Double) : BinaryOperation(baseValue, secondValue), Operation {
+class MultiplyOperation(baseValue: BigDecimal, secondValue: BigDecimal) : BinaryOperation(baseValue, secondValue), Operation {
 
-    override fun getResult() = baseValue * secondValue
+    override fun getResult(): BigDecimal = baseValue.multiply(secondValue)
 }

app/src/main/kotlin/com/simplemobiletools/calculator/operation/OperationFactory.kt

@@ -2,10 +2,11 @@ package com.simplemobiletools.calculator.operation
 
 import com.simplemobiletools.calculator.helpers.*
 import com.simplemobiletools.calculator.operation.base.Operation
+import java.math.BigDecimal
 
 object OperationFactory {
 
-    fun forId(id: String, baseValue: Double, secondValue: Double): Operation? {
+    fun forId(id: String, baseValue: BigDecimal, secondValue: BigDecimal): Operation? {
         return when (id) {
             PLUS -> PlusOperation(baseValue, secondValue)
             MINUS -> MinusOperation(baseValue, secondValue)

app/src/main/kotlin/com/simplemobiletools/calculator/operation/PercentOperation.kt

@@ -2,14 +2,15 @@ package com.simplemobiletools.calculator.operation
 
 import com.simplemobiletools.calculator.operation.base.BinaryOperation
 import com.simplemobiletools.calculator.operation.base.Operation
+import java.math.BigDecimal
 
-class PercentOperation(baseValue: Double, secondValue: Double) : BinaryOperation(baseValue, secondValue), Operation {
+class PercentOperation(baseValue: BigDecimal, secondValue: BigDecimal) : BinaryOperation(baseValue, secondValue), Operation {
 
-    override fun getResult(): Double {
+    override fun getResult(): BigDecimal {
-        var result = 0.0
+        return if (secondValue.compareTo(BigDecimal.ZERO) == 0) {
-        if (secondValue != 0.0) {
+            BigDecimal.ZERO
-            result = baseValue / 100 * secondValue
+        } else {
+            baseValue.divide(BigDecimal(100)).multiply(secondValue)
         }
-        return result
     }
 }

app/src/main/kotlin/com/simplemobiletools/calculator/operation/PlusOperation.kt

@@ -2,8 +2,9 @@ package com.simplemobiletools.calculator.operation
 
 import com.simplemobiletools.calculator.operation.base.BinaryOperation
 import com.simplemobiletools.calculator.operation.base.Operation
+import java.math.BigDecimal
 
-class PlusOperation(baseValue: Double, secondValue: Double) : BinaryOperation(baseValue, secondValue), Operation {
+class PlusOperation(baseValue: BigDecimal, secondValue: BigDecimal) : BinaryOperation(baseValue, secondValue), Operation {
 
-    override fun getResult() = baseValue + secondValue
+    override fun getResult(): BigDecimal = baseValue.add(secondValue)
 }

app/src/main/kotlin/com/simplemobiletools/calculator/operation/PowerOperation.kt

@@ -2,13 +2,18 @@ package com.simplemobiletools.calculator.operation
 
 import com.simplemobiletools.calculator.operation.base.BinaryOperation
 import com.simplemobiletools.calculator.operation.base.Operation
+import java.math.BigDecimal
+import kotlin.math.pow
 
-class PowerOperation(baseValue: Double, secondValue: Double) : BinaryOperation(baseValue, secondValue), Operation {
+class PowerOperation(baseValue: BigDecimal, secondValue: BigDecimal) : BinaryOperation(baseValue, secondValue), Operation {
 
-    override fun getResult(): Double {
+    override fun getResult(): BigDecimal {
-        var result = Math.pow(baseValue, secondValue)
+        val result = baseValue.toDouble().pow(secondValue.toDouble())
-        if (java.lang.Double.isInfinite(result) || java.lang.Double.isNaN(result))
+
-            result = 0.0
+        return if (java.lang.Double.isInfinite(result) || java.lang.Double.isNaN(result))
-        return result
+            BigDecimal.ZERO
+        else {
+            BigDecimal(result)
+        }
     }
 }

app/src/main/kotlin/com/simplemobiletools/calculator/operation/RootOperation.kt

@@ -2,8 +2,10 @@ package com.simplemobiletools.calculator.operation
 
 import com.simplemobiletools.calculator.operation.base.Operation
 import com.simplemobiletools.calculator.operation.base.UnaryOperation
+import java.math.BigDecimal
+import kotlin.math.sqrt
 
-class RootOperation(value: Double) : UnaryOperation(value), Operation {
+class RootOperation(value: BigDecimal) : UnaryOperation(value), Operation {
 
-    override fun getResult() = Math.sqrt(value)
+    override fun getResult() = BigDecimal(sqrt(value.toDouble()))
 }

app/src/main/kotlin/com/simplemobiletools/calculator/operation/base/BinaryOperation.kt

@@ -1,3 +1,5 @@
 package com.simplemobiletools.calculator.operation.base
 
-open class BinaryOperation protected constructor(protected var baseValue: Double, protected var secondValue: Double)
+import java.math.BigDecimal
+
+open class BinaryOperation protected constructor(protected val baseValue: BigDecimal, protected val secondValue: BigDecimal)

app/src/main/kotlin/com/simplemobiletools/calculator/operation/base/Operation.kt

@@ -1,5 +1,7 @@
 package com.simplemobiletools.calculator.operation.base
 
+import java.math.BigDecimal
+
 interface Operation {
-    fun getResult(): Double
+    fun getResult(): BigDecimal
 }

app/src/main/kotlin/com/simplemobiletools/calculator/operation/base/UnaryOperation.kt

@@ -1,3 +1,5 @@
 package com.simplemobiletools.calculator.operation.base
 
-open class UnaryOperation protected constructor(protected var value: Double)
+import java.math.BigDecimal
+
+open class UnaryOperation protected constructor(protected var value: BigDecimal)

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

@@ -5,7 +5,7 @@
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     android:orientation="vertical"
-    tools:context=".activities.MainActivity"
+    tools:context="com.simplemobiletools.calculator.activities.MainActivity"
     tools:ignore="HardcodedText">
 
     <TextView

app/src/test/java/com/simplemobiletools/calculator/MainActivityTest.kt

@@ -2,13 +2,15 @@ package com.simplemobiletools.calculator
 
 import com.simplemobiletools.calculator.activities.MainActivity
 import com.simplemobiletools.calculator.helpers.*
-import junit.framework.Assert.assertEquals
+import com.simplemobiletools.calculator.BuildConfig
+import org.junit.Assert.assertEquals
 import org.junit.Before
 import org.junit.Test
 import org.junit.runner.RunWith
 import org.robolectric.Robolectric
 import org.robolectric.RobolectricTestRunner
 import org.robolectric.annotation.Config
+import java.math.BigDecimal
 
 @RunWith(RobolectricTestRunner::class)
 @Config(constants = BuildConfig::class, sdk = [21])
@@ -37,35 +39,35 @@ class MainActivityTest {
 
     @Test
     fun additionTest() {
-        val res = calcResult(-1.2, PLUS, 3.4)
+        val res = calcResult(BigDecimal.valueOf(-1.2), PLUS, BigDecimal.valueOf(3.4))
         assertEquals("2.2", res)
         checkFormula("-1.2+3.4")
     }
 
     @Test
     fun subtractionTest() {
-        val res = calcResult(7.8, MINUS, 2.5)
+        val res = calcResult(BigDecimal.valueOf(7.8), MINUS, BigDecimal.valueOf(2.5))
         assertEquals("5.3", res)
         checkFormula("7.8-2.5")
     }
 
     @Test
     fun multiplyTest() {
-        val res = calcResult(-3.2, MULTIPLY, 6.6)
+        val res = calcResult(BigDecimal.valueOf(-3.2), MULTIPLY, BigDecimal.valueOf(6.6))
         assertEquals("-21.12", res)
         checkFormula("-3.2*6.6")
     }
 
     @Test
     fun divisionTest() {
-        val res = calcResult(18.25, DIVIDE, 5.0)
+        val res = calcResult(BigDecimal.valueOf(18.25), DIVIDE, BigDecimal.valueOf(5.0))
         assertEquals("3.65", res)
         checkFormula("18.25/5")
     }
 
     @Test
     fun divisionByZero_returnsZero() {
-        val res = calcResult(6.0, DIVIDE, 0.0)
+        val res = calcResult(BigDecimal.valueOf(6.0), DIVIDE, BigDecimal.valueOf(0.0))
         assertEquals("0", res)
         checkFormula("6/0")
     }
@@ -79,14 +81,14 @@ class MainActivityTest {
 
     @Test
     fun powerTest() {
-        val res = calcResult(3.0, POWER, 6.0)
+        val res = calcResult(BigDecimal.valueOf(3.0), POWER, BigDecimal.valueOf(6.0))
         assertEquals("729", res)
         checkFormula("3^6")
     }
 
     @Test
     fun rootTest() {
-        setDouble(16.0)
+        setBigDecimal(BigDecimal(16.0))
         handleOperation(ROOT)
         assertEquals("4", getDisplayedNumber())
         checkFormula("√16")
@@ -94,14 +96,14 @@ class MainActivityTest {
 
     @Test
     fun clearBtnSimpleTest() {
-        setDouble(156.0)
+        setBigDecimal(BigDecimal(156.0))
         activity.calc.handleClear()
         assertEquals("15", getDisplayedNumber())
     }
 
     @Test
     fun clearBtnComplexTest() {
-        setDouble(-26.0)
+        setBigDecimal(BigDecimal(-26.0))
         activity.calc.handleClear()
         assertEquals("-2", getDisplayedNumber())
         activity.calc.handleClear()
@@ -110,10 +112,10 @@ class MainActivityTest {
 
     @Test
     fun clearBtnLongClick_resetsEverything() {
-        calcResult(-1.2, PLUS, 3.4)
+        calcResult(BigDecimal.valueOf(-1.2), PLUS, BigDecimal.valueOf(3.4))
         activity.calc.handleReset()
         handleOperation(PLUS)
-        setDouble(3.0)
+        setBigDecimal(BigDecimal.valueOf(3.0))
         activity.calc.handleResult()
         assertEquals("3", getDisplayedNumber())
         checkFormula("")
@@ -121,14 +123,14 @@ class MainActivityTest {
 
     @Test
     fun complexTest() {
-        setDouble(-12.2)
+        setBigDecimal(BigDecimal.valueOf(-12.2))
         handleOperation(PLUS)
-        setDouble(21.0)
+        setBigDecimal(BigDecimal(21.0))
         handleOperation(MINUS)
         assertEquals("8.8", getDisplayedNumber())
         checkFormula("-12.2+21")
 
-        setDouble(1.6)
+        setBigDecimal(BigDecimal(1.6))
         activity.calc.handleEquals()
         assertEquals("7.2", getDisplayedNumber())
         checkFormula("8.8-1.6")
@@ -137,22 +139,22 @@ class MainActivityTest {
         checkFormula("7.2-1.6")
 
         handleOperation(MULTIPLY)
-        setDouble(5.0)
+        setBigDecimal(BigDecimal(5.0))
         handleOperation(DIVIDE)
         assertEquals("28", getDisplayedNumber())
         checkFormula("5.6*5")
 
-        setDouble(4.0)
+        setBigDecimal(BigDecimal(4.0))
         handleOperation(DIVIDE)
         assertEquals("7", getDisplayedNumber())
         checkFormula("28/4")
 
-        setDouble(5.0)
+        setBigDecimal(BigDecimal(5.0))
         handleOperation(POWER)
         assertEquals("2", getDisplayedNumber())
         checkFormula("7%5")
 
-        setDouble(8.0)
+        setBigDecimal(BigDecimal(8.0))
         handleOperation(ROOT)
         assertEquals("16", getDisplayedNumber())
         checkFormula("√256")
@@ -161,8 +163,8 @@ class MainActivityTest {
         assertEquals("1", getDisplayedNumber())
     }
 
-    private fun setDouble(d: Double) {
+    private fun setBigDecimal(d: BigDecimal) {
-        activity.setValueDouble(d)
+        activity.setValueBigDecimal(d)
     }
 
     private fun handleOperation(operation: String) {
@@ -173,10 +175,10 @@ class MainActivityTest {
         assertEquals(desired, activity.calc.displayedFormula)
     }
 
-    private fun calcResult(baseValue: Double, operation: String, secondValue: Double): String? {
+    private fun calcResult(baseValue: BigDecimal, operation: String, secondValue: BigDecimal): String? {
-        setDouble(baseValue)
+        setBigDecimal(baseValue)
         handleOperation(operation)
-        setDouble(secondValue)
+        setBigDecimal(secondValue)
         activity.calc.handleResult()
         return getDisplayedNumber()
     }