From 720c0534c4779d47e8365505ffb4b8879eb11f54 Mon Sep 17 00:00:00 2001
From: Daniel Brunner <0xFEEDC0DE64@gmail.com>
Date: Wed, 23 Nov 2016 20:21:37 +0100
Subject: [PATCH] Improved MainActivity

---
 .../daniel/myapplication/MainActivity.java    | 25 +++++++++++++------
 1 file changed, 18 insertions(+), 7 deletions(-)

diff --git a/mobile/src/main/java/com/example/daniel/myapplication/MainActivity.java b/mobile/src/main/java/com/example/daniel/myapplication/MainActivity.java
index efe2619..8669419 100644
--- a/mobile/src/main/java/com/example/daniel/myapplication/MainActivity.java
+++ b/mobile/src/main/java/com/example/daniel/myapplication/MainActivity.java
@@ -12,6 +12,7 @@ import android.support.v7.app.AppCompatActivity;
 import android.support.v7.widget.Toolbar;
 import android.view.Menu;
 import android.view.MenuItem;
+import android.app.Fragment;
 import android.app.FragmentManager;
 
 import com.example.daniel.myapplication.fragments.CameraFragment;
@@ -23,6 +24,12 @@ import com.example.daniel.myapplication.fragments.SlideshowFragment;
 public class MainActivity extends AppCompatActivity
         implements NavigationView.OnNavigationItemSelectedListener {
 
+    private Fragment mainFragment;
+    private Fragment cameraFragment;
+    private Fragment galleryFragment;
+    private Fragment slideshowFragment;
+    private Fragment manageFragment;
+
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
@@ -48,8 +55,13 @@ public class MainActivity extends AppCompatActivity
         NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
         navigationView.setNavigationItemSelectedListener(this);
 
-        FragmentManager fm = getFragmentManager();
-        fm.beginTransaction().replace(R.id.content_frame, new MainFragment()).commit();
+        mainFragment = new MainFragment();
+        cameraFragment = new CameraFragment();
+        galleryFragment = new GalleryFragment();
+        slideshowFragment = new SlideshowFragment();
+        manageFragment = new ManageFragment();
+
+        getFragmentManager().beginTransaction().replace(R.id.content_frame, mainFragment).commit();
     }
 
     @Override
@@ -89,16 +101,15 @@ public class MainActivity extends AppCompatActivity
     public boolean onNavigationItemSelected(MenuItem item) {
         // Handle navigation view item clicks here.
         int id = item.getItemId();
-        FragmentManager fm = getFragmentManager();
 
         if (id == R.id.nav_camera) {
-            fm.beginTransaction().replace(R.id.content_frame, new CameraFragment()).commit();
+            getFragmentManager().beginTransaction().replace(R.id.content_frame, cameraFragment).commit();
         } else if (id == R.id.nav_gallery) {
-            fm.beginTransaction().replace(R.id.content_frame, new GalleryFragment()).commit();
+            getFragmentManager().beginTransaction().replace(R.id.content_frame, galleryFragment).commit();
         } else if (id == R.id.nav_slideshow) {
-            fm.beginTransaction().replace(R.id.content_frame, new SlideshowFragment()).commit();
+            getFragmentManager().beginTransaction().replace(R.id.content_frame, slideshowFragment).commit();
         } else if (id == R.id.nav_manage) {
-            fm.beginTransaction().replace(R.id.content_frame, new ManageFragment()).commit();
+            getFragmentManager().beginTransaction().replace(R.id.content_frame, manageFragment).commit();
         } else if (id == R.id.nav_share) {
 
         } else if (id == R.id.nav_send) {