adding a toggle for preventing the phone from falling asleep

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

@@ -9,6 +9,7 @@ import android.os.Bundle
 import android.provider.MediaStore
 import android.view.Menu
 import android.view.MenuItem
+import android.view.WindowManager
 import android.webkit.MimeTypeMap
 import android.widget.SeekBar
 import com.simplemobiletools.commons.dialogs.ColorPickerDialog
@@ -85,6 +86,9 @@ class MainActivity : SimpleActivity(), CanvasListener {
         stroke_width_bar.beVisibleIf(isStrokeWidthBarEnabled)
         my_canvas.setIsStrokeWidthBarEnabled(isStrokeWidthBarEnabled)
         updateTextColors(main_holder)
+        if (config.preventPhoneFromSleeping) {
+            window.addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON)
+        }
     }
 
     override fun onPause() {
@@ -92,6 +96,9 @@ class MainActivity : SimpleActivity(), CanvasListener {
         config.brushColor = color
         config.brushSize = strokeWidth
         storeStateVariables()
+        if (config.preventPhoneFromSleeping) {
+            window.clearFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON)
+        }
     }
 
     override fun onDestroy() {

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

@@ -21,6 +21,7 @@ class SettingsActivity : SimpleActivity() {
         setupCustomizeColors()
         setupUseEnglish()
         setupAvoidWhatsNew()
+        setupPreventPhoneFromSleeping()
         setupBrushSize()
         updateTextColors(settings_holder)
     }
@@ -49,6 +50,14 @@ class SettingsActivity : SimpleActivity() {
         }
     }
 
+    private fun setupPreventPhoneFromSleeping() {
+        settings_prevent_phone_from_sleeping.isChecked = config.preventPhoneFromSleeping
+        settings_prevent_phone_from_sleeping_holder.setOnClickListener {
+            settings_prevent_phone_from_sleeping.toggle()
+            config.preventPhoneFromSleeping = settings_prevent_phone_from_sleeping.isChecked
+        }
+    }
+
     private fun setupBrushSize() {
         settings_show_brush_size.isChecked = config.showBrushSize
         settings_show_brush_size_holder.setOnClickListener {

app/src/main/kotlin/com/simplemobiletools/draw/helpers/Config.kt

@@ -28,4 +28,8 @@ class Config(context: Context) : BaseConfig(context) {
     var lastSaveFolder: String
         get() = prefs.getString(LAST_SAVE_FOLDER, "")
         set(lastSaveFolder) = prefs.edit().putString(LAST_SAVE_FOLDER, lastSaveFolder).apply()
+
+    var preventPhoneFromSleeping: Boolean
+        get() = prefs.getBoolean(PREVENT_PHONE_FROM_SLEEPING, true)
+        set(preventPhoneFromSleeping) = prefs.edit().putBoolean(PREVENT_PHONE_FROM_SLEEPING, preventPhoneFromSleeping).apply()
 }

app/src/main/kotlin/com/simplemobiletools/draw/helpers/Constants.kt

@@ -5,6 +5,7 @@ const val CANVAS_BACKGROUND_COLOR = "canvas_background_color"
 const val SHOW_BRUSH_SIZE = "show_brush_size"
 const val BRUSH_SIZE = "brush_size"
 const val LAST_SAVE_FOLDER = "last_save_folder"
+const val PREVENT_PHONE_FROM_SLEEPING = "prevent_phone_from_sleeping"
 
 const val PNG = "png"
 const val SVG = "svg"

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

@@ -79,6 +79,29 @@
 
         </RelativeLayout>
 
+        <RelativeLayout
+            android:id="@+id/settings_prevent_phone_from_sleeping_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.MySwitchCompat
+                android:id="@+id/settings_prevent_phone_from_sleeping"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:background="@null"
+                android:clickable="false"
+                android:paddingLeft="@dimen/medium_margin"
+                android:paddingStart="@dimen/medium_margin"
+                android:text="@string/prevent_phone_from_sleeping"/>
+
+        </RelativeLayout>
+
         <RelativeLayout
             android:id="@+id/settings_show_brush_size_holder"
             android:layout_width="match_parent"