[ADDED] [#2, #12] Gridview for the layout browsing.

[FIXED] Snackbar toggle issue.
[ADDED] Preferences to show snackbar only first time for specific layout.

Author: hossain-khan

app/src/main/java/com/hossainkhan/android/demo/browse/MainActivity.kt

@@ -18,6 +18,7 @@ package com.hossainkhan.android.demo.browse
 
 import android.support.v7.app.AppCompatActivity
 import android.os.Bundle
+import android.support.v7.widget.GridLayoutManager
 import android.support.v7.widget.LinearLayoutManager
 import android.support.v7.widget.RecyclerView
 import android.view.View
@@ -44,7 +45,7 @@ class MainActivity : AppCompatActivity() {
         Timber.d("Got data: ${appDataStore.isFirstTime()}")
         appDataStore.updateFirstTimeUser(false)
 
-        viewManager = LinearLayoutManager(this)
+        viewManager = GridLayoutManager(this, resources.getInteger(R.integer.grid_column_count))
         viewAdapter = LayoutBrowseAdapter(
                 data = appDataStore.layoutStore.supportedLayoutInfos,
                 itemSelectedListener = this::onLayoutItemSelected)

app/src/main/java/com/hossainkhan/android/demo/data/AppDataStore.kt

@@ -38,4 +38,18 @@ class AppDataStore @Inject constructor(
         preferences.edit().putBoolean(PREF_KEY_IS_FIRST_TIME_USER, isFirstTime).apply()
     }
 
+    /**
+     * Checks if layout information should be shown to user, and updates the flag if it should be shown.
+     *
+     * @return `true`, if it's first time being checked, else `false`
+     */
+    fun shouldshowLayoutInformation(layoutId: Int): Boolean {
+        val layoutPreferenceKey = layoutStore.getLayoutUrl(layoutId)
+        val shouldShow = preferences.getBoolean(layoutPreferenceKey, true)
+        if (shouldShow) {
+            preferences.edit().putBoolean(layoutPreferenceKey, false).apply()
+        }
+        return shouldShow
+    }
+
 }

app/src/main/java/com/hossainkhan/android/demo/layoutpositioning/LayoutPositioningDemoActivity.kt

@@ -81,7 +81,7 @@ class LayoutPositioningDemoActivity : AppCompatActivity() {
     /**
      * Loads layout information and previews in a snackbar.
      */
-    private fun showLayoutInfo(layoutInformation: LayoutInformation) {
+    private fun showLayoutInfo(layoutInformation: LayoutInformation, fromUser: Boolean = false) {
         if (flashbar == null) {
             flashbar = Flashbar.Builder(this)
                     .gravity(Flashbar.Gravity.BOTTOM)
@@ -108,8 +108,13 @@ class LayoutPositioningDemoActivity : AppCompatActivity() {
                     .build()
         }
 
-        if (flashbar?.isShowing() == false) {
-            flashbar?.show()
+        Timber.d("Flash bar showing: %s", flashbar?.isShown())
+        if (flashbar?.isShown() == false) {
+            if (fromUser || appDataStore.shouldshowLayoutInformation(layoutInformation.layoutResourceId)) {
+                flashbar?.show()
+            }
+        } else {
+            flashbar?.dismiss()
         }
     }
 
@@ -138,7 +143,7 @@ class LayoutPositioningDemoActivity : AppCompatActivity() {
     override fun onOptionsItemSelected(item: MenuItem): Boolean {
         return when (item.itemId) {
             R.id.show_layout_info_menu_item -> {
-                showLayoutInfo(layoutInformation)
+                showLayoutInfo(layoutInformation, true)
                 true
             }
             else -> super.onOptionsItemSelected(item)

app/src/main/res/values-land/dimens.xml

@@ -0,0 +1,20 @@
+<!--
+  ~ Copyright (c) 2018 Hossain Khan
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~     http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+  -->
+
+<resources>
+    <!-- On phone use more column on landscape mode for better content browsing -->
+    <item name="grid_column_count" type="integer">2</item>
+</resources>

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

@@ -20,4 +20,6 @@
     <dimen name="box_size_small">40dp</dimen>
     <dimen name="box_size_medium">80dp</dimen>
     <dimen name="box_size_large">120dp</dimen>
+
+    <item name="grid_column_count" type="integer">1</item>
 </resources>