update Commons, min OS to 5

.gitignore

@@ -1,7 +1,6 @@
 *.iml
 .gradle
 /local.properties
-/gradle.properties
 /.idea/
 .DS_Store
 /build

app/build.gradle

@@ -8,7 +8,7 @@ android {
 
     defaultConfig {
         applicationId "com.simplemobiletools.calculator"
-        minSdkVersion 16
+        minSdkVersion 21
         targetSdkVersion 28
         versionCode 22
         versionName "4.2.0"
@@ -43,16 +43,16 @@ android {
 }
 
 dependencies {
-    implementation 'com.simplemobiletools:commons:4.9.1'
+    implementation 'com.simplemobiletools:commons:5.1.4'
     implementation 'me.grantland:autofittextview:0.2.1'
 
     testImplementation 'junit:junit:4.12'
     testImplementation 'org.robolectric:robolectric:3.8'
 
     androidTestImplementation 'androidx.annotation:annotation:1.0.0'
-    androidTestImplementation 'androidx.test:runner:1.1.0-beta01'
-    androidTestImplementation 'androidx.test:rules:1.1.0-beta01'
-    androidTestImplementation 'androidx.test.espresso:espresso-core:3.1.0-beta01'
+    androidTestImplementation 'androidx.test:runner:1.1.0-beta02'
+    androidTestImplementation 'androidx.test:rules:1.1.0-beta02'
+    androidTestImplementation 'androidx.test.espresso:espresso-core:3.1.0-beta02'
 }
 
 Properties props = new Properties()

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

@@ -112,6 +112,7 @@ class MainActivity : SimpleActivity(), Calculator {
     private fun launchSettings() {
         startActivity(Intent(applicationContext, SettingsActivity::class.java))
     }
+
     private fun launchScientific() {
         startActivity(Intent(applicationContext, ScientificActivity::class.java))
     }

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

@@ -111,7 +111,7 @@ class WidgetConfigureActivity : SimpleActivity() {
         config_save.setTextColor(mTextColor)
 
         val viewIds = intArrayOf(R.id.btn_0, R.id.btn_1, R.id.btn_2, R.id.btn_3, R.id.btn_4, R.id.btn_5, R.id.btn_6, R.id.btn_7, R.id.btn_8,
-                R.id.btn_9, R.id.btn_percent, R.id.btn_power, R.id.btn_root, R.id.btn_factorial, R.id.btn_clear, R.id.btn_reset, R.id.btn_divide, R.id.btn_multiply,
+                R.id.btn_9, R.id.btn_percent, R.id.btn_power, R.id.btn_root, R.id.btn_clear, R.id.btn_reset, R.id.btn_divide, R.id.btn_multiply,
                 R.id.btn_minus, R.id.btn_plus, R.id.btn_decimal, R.id.btn_equals)
         result.setTextColor(mTextColor)
         formula.setTextColor(mTextColor)

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

@@ -58,7 +58,7 @@ class CalculatorImpl(calculator: Calculator, val context: Context) {
 
         if (sign == "√") {
             setFormula(sign + first)
-        } else if (sign == "!"){
+        } else if (sign == "!") {
             setFormula(first + sign)
         } else if (!sign.isEmpty()) {
             var formula = first + sign + second
@@ -125,7 +125,7 @@ class CalculatorImpl(calculator: Calculator, val context: Context) {
 
     fun handleOperation(operation: String) {
         mWasPercentLast = operation == PERCENT
-        if (lastKey == DIGIT && operation != ROOT && operation!= FACTORIAL) {
+        if (lastKey == DIGIT && operation != ROOT && operation != FACTORIAL) {
             handleResult()
         }
 

app/src/main/res/values-v21/styles.xml

@@ -1,11 +0,0 @@
-<resources>
-
-    <style name="MyButton" parent="Widget.AppCompat.Button">
-        <item name="android:textColor">@color/color_primary</item>
-        <item name="android:background">?android:attr/selectableItemBackgroundBorderless</item>
-        <item name="android:textSize">@dimen/button_text_size</item>
-        <item name="android:fontFamily">sans-serif-light</item>
-        <item name="android:textAllCaps">false</item>
-    </style>
-
-</resources>

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

@@ -3,7 +3,7 @@
     <style name="AppTheme" parent="AppTheme.Base"/>
 
     <style name="MyButton" parent="Widget.AppCompat.Button">
-        <item name="android:background">@drawable/button</item>
+        <item name="android:background">?android:attr/selectableItemBackgroundBorderless</item>
         <item name="android:textSize">@dimen/button_text_size</item>
         <item name="android:fontFamily">sans-serif-light</item>
         <item name="android:textAllCaps">false</item>

build.gradle

@@ -9,7 +9,7 @@ buildscript {
     }
 
     dependencies {
-        classpath 'com.android.tools.build:gradle:3.2.0'
+        classpath 'com.android.tools.build:gradle:3.2.1'
         classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
 
         // NOTE: Do not place your application dependencies here; they belong