fix #36, allow changing the Bright Display color

app/build.gradle

@@ -41,7 +41,7 @@ android {
 }
 
 dependencies {
-    implementation 'com.simplemobiletools:commons:3.18.6'
+    implementation 'com.simplemobiletools:commons:3.18.8'
     implementation 'com.squareup:otto:1.3.8'
     implementation 'com.android.support.constraint:constraint-layout:1.0.2'
 }

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

@@ -3,7 +3,9 @@ package com.simplemobiletools.flashlight.activities
 import android.graphics.drawable.ColorDrawable
 import android.os.Bundle
 import android.view.WindowManager
-
+import com.simplemobiletools.commons.dialogs.ColorPickerDialog
+import com.simplemobiletools.commons.extensions.applyColorFilter
+import com.simplemobiletools.commons.extensions.getContrastColor
 import com.simplemobiletools.flashlight.R
 import com.simplemobiletools.flashlight.extensions.config
 import kotlinx.android.synthetic.main.activity_bright_display.*
@@ -13,7 +15,19 @@ class BrightDisplayActivity : SimpleActivity() {
         super.onCreate(savedInstanceState)
         setContentView(R.layout.activity_bright_display)
         supportActionBar?.hide()
-        display_holder.background = ColorDrawable(config.brightDisplayColor)
+        setBackgroundColor(config.brightDisplayColor)
+
+        bright_display_change_color.setOnClickListener {
+            ColorPickerDialog(this, config.brightDisplayColor, true, currentColorCallback = {
+                setBackgroundColor(it)
+            }) { wasPositivePressed, color ->
+                if (wasPositivePressed) {
+                    config.brightDisplayColor = color
+                } else {
+                    setBackgroundColor(config.brightDisplayColor)
+                }
+            }
+        }
     }
 
     override fun onResume() {
@@ -28,6 +42,14 @@ class BrightDisplayActivity : SimpleActivity() {
         toggleBrightness(false)
     }
 
+    private fun setBackgroundColor(color: Int) {
+        bright_display.background = ColorDrawable(color)
+
+        val contrastColor = config.brightDisplayColor.getContrastColor()
+        bright_display_change_color.setTextColor(contrastColor)
+        bright_display_change_color.background.applyColorFilter(contrastColor)
+    }
+
     private fun toggleBrightness(increase: Boolean) {
         val layout = window.attributes
         layout.screenBrightness = (if (increase) 1 else 0).toFloat()

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

@@ -65,11 +65,13 @@ class WidgetConfigureActivity : SimpleActivity() {
     }
 
     private fun pickBackgroundColor() {
-        ColorPickerDialog(this, mWidgetColorWithoutTransparency) {
+        ColorPickerDialog(this, mWidgetColorWithoutTransparency) { wasPositivePressed, color ->
-            mWidgetColorWithoutTransparency = it
+            if (wasPositivePressed) {
+                mWidgetColorWithoutTransparency = color
                 updateColors()
             }
         }
+    }
 
     private fun requestWidgetUpdate() {
         Intent(AppWidgetManager.ACTION_APPWIDGET_UPDATE, null, this, MyWidgetProvider::class.java).apply {

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

@@ -1,7 +1,25 @@
 <?xml version="1.0" encoding="utf-8"?>
-<FrameLayout
+<RelativeLayout
     xmlns:android="http://schemas.android.com/apk/res/android"
-    android:id="@+id/display_holder"
+    android:id="@+id/bright_display_holder"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent">
+
+    <FrameLayout
+        android:id="@+id/bright_display"
         android:layout_width="match_parent"
         android:layout_height="match_parent"
         android:background="@android:color/white"/>
+
+    <TextView
+        android:id="@+id/bright_display_change_color"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_centerInParent="true"
+        android:alpha="0.5"
+        android:background="@drawable/button_background"
+        android:padding="@dimen/activity_margin"
+        android:text="@string/change_color"
+        android:textSize="@dimen/big_text_size"/>
+
+</RelativeLayout>