add a Settings button for customizing widget color without recreating it

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

@@ -1,8 +1,10 @@
 package com.simplemobiletools.flashlight.activities
 
+import android.content.Intent
 import android.os.Bundle
 import com.simplemobiletools.commons.extensions.beVisibleIf
 import com.simplemobiletools.commons.extensions.updateTextColors
+import com.simplemobiletools.commons.helpers.IS_CUSTOMIZING_COLORS
 import com.simplemobiletools.flashlight.R
 import com.simplemobiletools.flashlight.extensions.config
 import kotlinx.android.synthetic.main.activity_settings.*
@@ -18,6 +20,7 @@ class SettingsActivity : SimpleActivity() {
         super.onResume()
 
         setupCustomizeColors()
+        setupCustomizeWidgetColors()
         setupUseEnglish()
         setupAvoidWhatsNew()
         setupTurnFlashlightOn()
@@ -33,6 +36,15 @@ class SettingsActivity : SimpleActivity() {
         }
     }
 
+    private fun setupCustomizeWidgetColors() {
+        settings_customize_widget_colors_holder.setOnClickListener {
+            Intent(this, WidgetConfigureActivity::class.java).apply {
+                putExtra(IS_CUSTOMIZING_COLORS, true)
+                startActivity(this)
+            }
+        }
+    }
+
     private fun setupUseEnglish() {
         settings_use_english_holder.beVisibleIf(config.wasUseEnglishToggled || Locale.getDefault().language != "en")
         settings_use_english.isChecked = config.useEnglish

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

@@ -10,6 +10,7 @@ import com.simplemobiletools.commons.dialogs.ColorPickerDialog
 import com.simplemobiletools.commons.extensions.adjustAlpha
 import com.simplemobiletools.commons.extensions.applyColorFilter
 import com.simplemobiletools.commons.extensions.setFillWithStroke
+import com.simplemobiletools.commons.helpers.IS_CUSTOMIZING_COLORS
 import com.simplemobiletools.flashlight.R
 import com.simplemobiletools.flashlight.extensions.config
 import com.simplemobiletools.flashlight.helpers.MyWidgetProvider
@@ -28,12 +29,12 @@ class WidgetConfigureActivity : SimpleActivity() {
         setContentView(R.layout.widget_config)
         initVariables()
 
-        val extras = intent.extras
+        val isCustomizingColors = intent.extras?.getBoolean(IS_CUSTOMIZING_COLORS) ?: false
-        if (extras != null)
+        mWidgetId = intent.extras?.getInt(AppWidgetManager.EXTRA_APPWIDGET_ID) ?: AppWidgetManager.INVALID_APPWIDGET_ID
-            mWidgetId = extras.getInt(AppWidgetManager.EXTRA_APPWIDGET_ID, AppWidgetManager.INVALID_APPWIDGET_ID)
 
-        if (mWidgetId == AppWidgetManager.INVALID_APPWIDGET_ID)
+        if (mWidgetId == AppWidgetManager.INVALID_APPWIDGET_ID && !isCustomizingColors) {
             finish()
+        }
 
         config_save.setOnClickListener { saveConfig() }
         config_widget_color.setOnClickListener { pickBackgroundColor() }

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

@@ -33,6 +33,28 @@
 
         </RelativeLayout>
 
+        <RelativeLayout
+            android:id="@+id/settings_customize_widget_colors_holder"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="@dimen/medium_margin"
+            android:background="?attr/selectableItemBackground"
+            android:paddingBottom="@dimen/activity_margin"
+            android:paddingLeft="@dimen/normal_margin"
+            android:paddingRight="@dimen/normal_margin"
+            android:paddingTop="@dimen/activity_margin">
+
+            <com.simplemobiletools.commons.views.MyTextView
+                android:id="@+id/settings_customize_widget_colors_label"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_centerVertical="true"
+                android:paddingLeft="@dimen/medium_margin"
+                android:paddingStart="@dimen/medium_margin"
+                android:text="@string/customize_widget_colors"/>
+
+        </RelativeLayout>
+
         <RelativeLayout
             android:id="@+id/settings_use_english_holder"
             android:layout_width="match_parent"