add an option to use volume buttons as shutter

app/src/main/kotlin/com/simplemobiletools/camera/Config.kt

@@ -34,6 +34,10 @@ class Config(context: Context) : BaseConfig(context) {
         get() = prefs.getBoolean(FOCUS_BEFORE_CAPTURE, true)
         set(focus) = prefs.edit().putBoolean(FOCUS_BEFORE_CAPTURE, focus).apply()
 
+    var volumeButtonsAsShutter: Boolean
+        get() = prefs.getBoolean(VOLUME_BUTTONS_AS_SHUTTER, false)
+        set(volumeButtonsAsShutter) = prefs.edit().putBoolean(VOLUME_BUTTONS_AS_SHUTTER, volumeButtonsAsShutter).apply()
+
     var lastUsedCamera: Int
         get() = prefs.getInt(LAST_USED_CAMERA, Camera.CameraInfo.CAMERA_FACING_BACK)
         set(cameraId) = prefs.edit().putInt(LAST_USED_CAMERA, cameraId).apply()

app/src/main/kotlin/com/simplemobiletools/camera/Constants.kt

@@ -9,6 +9,7 @@ val SAVE_PHOTOS = "save_photos"
 val SHOW_PREVIEW = "show_preview"
 val SOUND = "sound"
 val FOCUS_BEFORE_CAPTURE = "focus_before_capture"
+val VOLUME_BUTTONS_AS_SHUTTER = "volume_buttons_as_shutter"
 val LAST_USED_CAMERA = "last_used_camera"
 val FLASHLIGHT_STATE = "flashlight_state"
 val BACK_PHOTO_RESOLUTION_INDEX = "back_photo_resolution_index"

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

@@ -28,6 +28,7 @@ class SettingsActivity : SimpleActivity() {
         setupShowPreview()
         setupSound()
         setupFocusBeforeCapture()
+        setupVolumeButtonsAsShutter()
         updateTextColors(settings_holder)
     }
 
@@ -90,4 +91,12 @@ class SettingsActivity : SimpleActivity() {
             config.focusBeforeCapture = settings_focus_before_capture.isChecked
         }
     }
+
+    private fun setupVolumeButtonsAsShutter() {
+        settings_volume_buttons_as_shutter.isChecked = config.volumeButtonsAsShutter
+        settings_volume_buttons_as_shutter_holder.setOnClickListener {
+            settings_volume_buttons_as_shutter.toggle()
+            config.volumeButtonsAsShutter = settings_volume_buttons_as_shutter.isChecked
+        }
+    }
 }

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

@@ -124,5 +124,25 @@
                 android:text="@string/focus_before_capture"/>
 
         </RelativeLayout>
+
+        <RelativeLayout
+            android:id="@+id/settings_volume_buttons_as_shutter_holder"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="@dimen/medium_margin"
+            android:background="?attr/selectableItemBackground"
+            android:padding="@dimen/activity_margin">
+
+            <com.simplemobiletools.commons.views.MySwitchCompat
+                android:id="@+id/settings_volume_buttons_as_shutter"
+                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/volume_buttons_as_shutter"/>
+
+        </RelativeLayout>
     </LinearLayout>
 </ScrollView>

app/src/main/res/values-de/strings.xml

@@ -25,6 +25,7 @@
     <string name="photo">Photo</string>
     <string name="video">Video</string>
     <string name="focus_before_capture">Vor der Aufnahme fokussieren</string>
+    <string name="volume_buttons_as_shutter">Use volume buttons as shutter</string>
 
     <!-- Strings displayed only on Google Playstore. Optional, but good to have -->
     <!-- Short description has to have less than 80 chars -->

app/src/main/res/values-es/strings.xml

@@ -25,6 +25,7 @@
     <string name="photo">Photo</string>
     <string name="video">Video</string>
     <string name="focus_before_capture">Focus before capture</string>
+    <string name="volume_buttons_as_shutter">Use volume buttons as shutter</string>
 
     <!-- Strings displayed only on Google Playstore. Optional, but good to have -->
     <!-- Short description has to have less than 80 chars -->

app/src/main/res/values-fr/strings.xml

@@ -25,6 +25,7 @@
     <string name="photo">Photo</string>
     <string name="video">Video</string>
     <string name="focus_before_capture">Focus before capture</string>
+    <string name="volume_buttons_as_shutter">Use volume buttons as shutter</string>
 
     <!-- Strings displayed only on Google Playstore. Optional, but good to have -->
     <!-- Short description has to have less than 80 chars -->

app/src/main/res/values-it/strings.xml

@@ -25,6 +25,7 @@
     <string name="photo">Photo</string>
     <string name="video">Video</string>
     <string name="focus_before_capture">Messa a fuoco prima della cattura</string>
+    <string name="volume_buttons_as_shutter">Use volume buttons as shutter</string>
 
     <!-- Strings displayed only on Google Playstore. Optional, but good to have -->
     <!-- Short description has to have less than 80 chars -->

app/src/main/res/values-ja/strings.xml

@@ -25,6 +25,7 @@
     <string name="photo">Photo</string>
     <string name="video">Video</string>
     <string name="focus_before_capture">キャプチャ前に再度焦点を合わせる</string>
+    <string name="volume_buttons_as_shutter">Use volume buttons as shutter</string>
 
     <!-- Strings displayed only on Google Playstore. Optional, but good to have -->
     <!-- Short description has to have less than 80 chars -->

app/src/main/res/values-lt/strings.xml

@@ -25,6 +25,7 @@
     <string name="photo">Photo</string>
     <string name="video">Video</string>
     <string name="focus_before_capture">Focus before capture</string>
+    <string name="volume_buttons_as_shutter">Use volume buttons as shutter</string>
 
     <!-- Strings displayed only on Google Playstore. Optional, but good to have -->
     <!-- Short description has to have less than 80 chars -->

app/src/main/res/values-nl/strings.xml

@@ -26,6 +26,7 @@
     <string name="photo">Foto</string>
     <string name="video">Video</string>
     <string name="focus_before_capture">Focus before capture</string>
+    <string name="volume_buttons_as_shutter">Use volume buttons as shutter</string>
 
     <!-- Strings displayed only on Google Playstore. Optional, but good to have -->
     <!-- Short description has to have less than 80 chars -->

app/src/main/res/values-pt-rBR/strings.xml

@@ -25,6 +25,7 @@
     <string name="photo">Foto</string>
     <string name="video">Vídeo</string>
     <string name="focus_before_capture">Focus before capture</string>
+    <string name="volume_buttons_as_shutter">Use volume buttons as shutter</string>
 
     <!-- Strings displayed only on Google Playstore. Optional, but good to have -->
     <!-- Short description has to have less than 80 chars -->

app/src/main/res/values-pt/strings.xml

@@ -25,6 +25,7 @@
     <string name="photo">Foto</string>
     <string name="video">Vídeo</string>
     <string name="focus_before_capture">Focus before capture</string>
+    <string name="volume_buttons_as_shutter">Use volume buttons as shutter</string>
 
     <!-- Strings displayed only on Google Playstore. Optional, but good to have -->
     <!-- Short description has to have less than 80 chars -->

app/src/main/res/values-ru/strings.xml

@@ -25,6 +25,7 @@
     <string name="photo">Фото</string>
     <string name="video">Видео</string>
     <string name="focus_before_capture">Перефокусировка перед захватом</string>
+    <string name="volume_buttons_as_shutter">Use volume buttons as shutter</string>
 
     <!-- Strings displayed only on Google Playstore. Optional, but good to have -->
     <!-- Short description has to have less than 80 chars -->

app/src/main/res/values-sv/strings.xml

@@ -25,6 +25,7 @@
     <string name="photo">Photo</string>
     <string name="video">Video</string>
     <string name="focus_before_capture">Fokusera om innan bildtagning</string>
+    <string name="volume_buttons_as_shutter">Use volume buttons as shutter</string>
 
     <!-- Strings displayed only on Google Playstore. Optional, but good to have -->
     <!-- Short description has to have less than 80 chars -->

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

@@ -25,6 +25,7 @@
     <string name="photo">Photo</string>
     <string name="video">Video</string>
     <string name="focus_before_capture">Focus before capture</string>
+    <string name="volume_buttons_as_shutter">Use volume buttons as shutter</string>
 
     <!-- Strings displayed only on Google Playstore. Optional, but good to have -->
     <!-- Short description has to have less than 80 chars -->