Update sample app with grid layout toggle button

Author: xabaras

sample/build.gradle

@@ -6,8 +6,8 @@ android {
         applicationId "it.xabaras.android.recyclerview.swipedecorator.sample"
         minSdkVersion 15
         targetSdkVersion 28
-        versionCode 1
-        versionName "1.0"
+        versionCode 2
+        versionName "1.1"
         testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
     }
     buildTypes {

sample/src/main/java/it/xabaras/android/recyclerview/swipedecorator/sample/MainActivity.java

@@ -7,6 +7,7 @@
 import android.support.v7.app.AppCompatActivity;
 import android.os.Bundle;
 import android.support.v7.widget.DividerItemDecoration;
+import android.support.v7.widget.GridLayoutManager;
 import android.support.v7.widget.LinearLayoutManager;
 import android.support.v7.widget.RecyclerView;
 import android.support.v7.widget.helper.ItemTouchHelper;
@@ -21,13 +22,16 @@
 public class MainActivity extends AppCompatActivity {
 
     private SampleRecyclerViewAdapter mAdapter;
+    private MenuItem actionToggleLayout;
+    private boolean isLinear = true;
+    private RecyclerView recyclerView;
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_main);
 
-        RecyclerView recyclerView = (RecyclerView) findViewById(R.id.recyclerView);
+        recyclerView = (RecyclerView) findViewById(R.id.recyclerView);
         // Set a layout manager
         recyclerView.setLayoutManager(new LinearLayoutManager(this));
         recyclerView.addItemDecoration(new DividerItemDecoration(this, LinearLayoutManager.VERTICAL));
@@ -89,15 +93,35 @@ public void onChildDraw (Canvas c, RecyclerView recyclerView, RecyclerView.ViewH
     public boolean onCreateOptionsMenu(Menu menu) {
         MenuInflater inflater = getMenuInflater();
         inflater.inflate(R.menu.main, menu);
+
+        actionToggleLayout = menu.findItem(R.id.actionToggleLayout);
+
         return true;
     }
 
     @Override
     public boolean onOptionsItemSelected(MenuItem item) {
         try {
-            if ( item.getItemId() == R.id.actionRefresh ) {
-                mAdapter.reloadItems();
-                mAdapter.notifyDataSetChanged();
+            switch (item.getItemId()) {
+                case R.id.actionRefresh: {
+                    mAdapter.reloadItems();
+                    mAdapter.notifyDataSetChanged();
+                    break;
+                }
+                case R.id.actionToggleLayout: {
+                    if ( isLinear ) {
+                        recyclerView.setLayoutManager(new GridLayoutManager(this, 2));
+                        actionToggleLayout.setIcon(R.drawable.ic_list_white_24dp);
+                        isLinear = false;
+                    } else {
+                        recyclerView.setLayoutManager(new LinearLayoutManager(this));
+                        actionToggleLayout.setIcon(R.drawable.ic_grid_on_white_24dp);
+                        isLinear = true;
+                    }
+                    break;
+                }
+                default:
+                    break;
             }
         } catch(Exception e) {
             Log.e("MainActivity", e.getMessage());

sample/src/main/res/drawable/ic_grid_on_white_24dp.xml

@@ -0,0 +1,5 @@
+<vector android:height="24dp" android:tint="#FFFFFF"
+    android:viewportHeight="24.0" android:viewportWidth="24.0"
+    android:width="24dp" xmlns:android="http://schemas.android.com/apk/res/android">
+    <path android:fillColor="#FF000000" android:pathData="M20,2L4,2c-1.1,0 -2,0.9 -2,2v16c0,1.1 0.9,2 2,2h16c1.1,0 2,-0.9 2,-2L22,4c0,-1.1 -0.9,-2 -2,-2zM8,20L4,20v-4h4v4zM8,14L4,14v-4h4v4zM8,8L4,8L4,4h4v4zM14,20h-4v-4h4v4zM14,14h-4v-4h4v4zM14,8h-4L10,4h4v4zM20,20h-4v-4h4v4zM20,14h-4v-4h4v4zM20,8h-4L16,4h4v4z"/>
+</vector>

sample/src/main/res/drawable/ic_list_white_24dp.xml

@@ -0,0 +1,5 @@
+<vector android:height="24dp" android:tint="#FFFFFF"
+    android:viewportHeight="24.0" android:viewportWidth="24.0"
+    android:width="24dp" xmlns:android="http://schemas.android.com/apk/res/android">
+    <path android:fillColor="#FF000000" android:pathData="M3,13h2v-2L3,11v2zM3,17h2v-2L3,15v2zM3,9h2L5,7L3,7v2zM7,13h14v-2L7,11v2zM7,17h14v-2L7,15v2zM7,7v2h14L21,7L7,7z"/>
+</vector>

sample/src/main/res/layout/activity_main.xml

@@ -1,6 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
-    xmlns:app="http://schemas.android.com/apk/res-auto"
     xmlns:tools="http://schemas.android.com/tools"
     android:layout_width="match_parent"
     android:layout_height="match_parent"

sample/src/main/res/menu/main.xml

@@ -1,6 +1,11 @@
 <?xml version="1.0" encoding="utf-8"?>
 <menu xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto">
+    <item
+        android:id="@+id/actionToggleLayout"
+        android:title="@string/action_toggle"
+        app:showAsAction="always"
+        android:icon="@drawable/ic_grid_on_white_24dp"/>
     <item
         android:id="@+id/actionRefresh"
         android:title="@string/action_refresh"

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

@@ -3,4 +3,5 @@
     <string name="action_archive">Archive</string>
     <string name="action_delete">Delete</string>
     <string name="action_refresh">Refresh</string>
+    <string name="action_toggle">Toggle Layout Manager</string>
 </resources>