Changes are now persisted when application is closed while the Snackbar is opened.

Edit list menu button is now outside the menu, with an icon
New menu button to allow faster layout changing (does the same as going in the Settings)
Current opened tab is now saved when re-opening app

DoNExt/app/build.gradle

@@ -8,8 +8,8 @@ android {
         applicationId "com.wismna.geoffroy.donext"
         minSdkVersion 15
         targetSdkVersion 23
-        versionCode 6
+        versionCode 7
-        versionName "0.6"
+        versionName "0.7"
     }
     buildTypes {
         release {

DoNExt/app/src/main/java/com/wismna/geoffroy/donext/activities/MainActivity.java

@@ -1,7 +1,9 @@
 package com.wismna.geoffroy.donext.activities;
 
 import android.content.Intent;
+import android.content.SharedPreferences;
 import android.os.Bundle;
+import android.preference.PreferenceManager;
 import android.support.design.widget.FloatingActionButton;
 import android.support.design.widget.TabLayout;
 import android.support.v4.app.Fragment;
@@ -72,6 +74,10 @@ public class MainActivity extends AppCompatActivity implements TasksFragment.Tas
             // Set up the ViewPager with the sections adapter.
             mViewPager = (ViewPager) findViewById(R.id.container);
             mViewPager.setAdapter(mSectionsPagerAdapter);
+            // Open last opened tab
+            SharedPreferences sharedPref =
+                    PreferenceManager.getDefaultSharedPreferences(MainActivity.this);
+            mViewPager.setCurrentItem(sharedPref.getInt("last_opened_tab", 0));
 
             TabLayout tabLayout = (TabLayout) findViewById(R.id.tabs);
             tabLayout.setupWithViewPager(mViewPager);
@@ -80,8 +86,36 @@ public class MainActivity extends AppCompatActivity implements TasksFragment.Tas
             FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
             fab.show();
         }
-
     }
+
+    @Override
+    protected void onPause() {
+        super.onPause();
+        // Save currently opened tab
+        SharedPreferences sharedPref =
+                PreferenceManager.getDefaultSharedPreferences(MainActivity.this);
+        SharedPreferences.Editor editor = sharedPref.edit();
+        editor.putInt("last_opened_tab", mViewPager.getCurrentItem());
+        editor.apply();
+    }
+
+    @Override
+    public boolean onPrepareOptionsMenu(Menu menu) {
+        MenuItem item = menu.findItem(R.id.action_changeLayout);
+        SharedPreferences sharedPref = PreferenceManager.getDefaultSharedPreferences(this);
+        String layoutType = sharedPref.getString("pref_conf_task_layout", "1");
+        switch (layoutType) {
+            case "1" :
+                item.setIcon(R.drawable.ic_list_white_24dp);
+                break;
+            case "2" :
+                item.setIcon(R.drawable.ic_view_list_white_24dp);
+                break;
+        }
+
+        return super.onPrepareOptionsMenu(menu);
+    }
+
     @Override
     public boolean onCreateOptionsMenu(Menu menu) {
         // Inflate the menu; this adds items to the action bar if it is present.
@@ -122,17 +156,33 @@ public class MainActivity extends AppCompatActivity implements TasksFragment.Tas
         taskDialogFragment.show(manager, "Create new task");
     }
 
-    /** Called when the user clicks the Settings button  */
+    /** Called when the user clicks on the Change Layout button */
-    public void openSettings(MenuItem menuItem) {
+    public void changeLayout(MenuItem item) {
-        Intent intent = new Intent(this, SettingsActivity.class);
+        SharedPreferences sharedPref = PreferenceManager.getDefaultSharedPreferences(this);
-        startActivity(intent);
+        SharedPreferences.Editor editor = sharedPref.edit();
+        String layoutTypeString = sharedPref.getString("pref_conf_task_layout", "1");
+        int layoutType = Integer.valueOf(layoutTypeString);
+        editor.putString("pref_conf_task_layout", String.valueOf(layoutType % 2 + 1));
+        editor.apply();
+
+        // Update the ViewPagerAdapter to refresh all tabs
+        mSectionsPagerAdapter.notifyDataSetChanged();
+        // Invalidate the menu to redraw the icon
+        invalidateOptionsMenu();
     }
+
     /** Called when the user clicks the Edit Lists button  */
     public void openTaskLists(MenuItem menuItem) {
         Intent intent = new Intent(this, TaskListActivity.class);
         startActivity(intent);
     }
 
+    /** Called when the user clicks the Settings button  */
+    public void openSettings(MenuItem menuItem) {
+        Intent intent = new Intent(this, SettingsActivity.class);
+        startActivity(intent);
+    }
+
     private TaskRecyclerViewAdapter getSpecificTabAdapter(int position) {
         TasksFragment taskFragment = (TasksFragment) mSectionsPagerAdapter.getRegisteredFragment(position);
         if (taskFragment == null) return null;

DoNExt/app/src/main/java/com/wismna/geoffroy/donext/adapters/SmartFragmentStatePagerAdapter.java

@@ -21,6 +21,11 @@ public abstract class SmartFragmentStatePagerAdapter extends FragmentStatePagerA
         super(fragmentManager);
     }
 
+    @Override
+    public int getItemPosition(Object object) {
+        return POSITION_NONE;
+    }
+
     // Register the fragment when the item is instantiated
     @Override
     public Object instantiateItem(ViewGroup container, int position) {

DoNExt/app/src/main/java/com/wismna/geoffroy/donext/fragments/TasksFragment.java

@@ -52,6 +52,7 @@ public class TasksFragment extends Fragment implements
     private View view;
     private RecyclerView recyclerView;
     private TaskChangedAdapter mAdapter;
+    private Snackbar snackbar;
 
     /**
      * Mandatory empty constructor for the fragment manager to instantiate the
@@ -164,6 +165,7 @@ public class TasksFragment extends Fragment implements
     @Override
     public void onDestroy() {
         super.onDestroy();
+        if (snackbar != null) snackbar.dismiss();
         taskDataAccess.close();
     }
 
@@ -198,7 +200,7 @@ public class TasksFragment extends Fragment implements
         }
 
         // Setup the snack bar
-        Snackbar.make(view, "Task " + action, Snackbar.LENGTH_LONG)
+        snackbar = Snackbar.make(view, "Task " + action, Snackbar.LENGTH_LONG)
             .setAction("Undo", new View.OnClickListener() {
                 @Override
                 public void onClick(View v) {
@@ -220,7 +222,8 @@ public class TasksFragment extends Fragment implements
                     taskRecyclerViewAdapter.add(task, itemPosition);
                     recyclerView.scrollToPosition(0);
                 }
-            }).setCallback(new Snackbar.Callback() {
+            });
+        snackbar.setCallback(new Snackbar.Callback() {
             @Override
             public void onDismissed(Snackbar snackbar, int event) {
                 super.onDismissed(snackbar, event);
@@ -243,8 +246,6 @@ public class TasksFragment extends Fragment implements
                         // Commit the changes to DB
                         taskDataAccess.deleteTask(itemId);
                 }
-
-                    //UpdateCycleCount();
             }
         }).show();
     }

DoNExt/app/src/main/res/layout/activity_main.xml

@@ -26,7 +26,8 @@
         <android.support.design.widget.TabLayout
             android:id="@+id/tabs"
             android:layout_width="match_parent"
-            android:layout_height="wrap_content" />
+            android:layout_height="wrap_content"
+            app:tabMode="scrollable" />
 
     </android.support.design.widget.AppBarLayout>
 

DoNExt/app/src/main/res/menu/menu_main.xml

@@ -9,11 +9,19 @@
         android:onClick="openNewTaskDialog"
         app:showAsAction="never" />-->
     <item
-        android:id="@+id/action_editTabs"
+        android:id="@+id/action_changeLayout"
         android:orderInCategory="20"
+        android:title="@string/action_changeLayout"
+        android:onClick="changeLayout"
+        android:icon="@drawable/ic_view_list_white_24dp"
+        app:showAsAction="ifRoom" />
+    <item
+        android:id="@+id/action_editTabs"
+        android:orderInCategory="25"
         android:title="@string/action_editTabs"
         android:onClick="openTaskLists"
-        app:showAsAction="never" />
+        android:icon="@drawable/ic_create_new_folder_white_24dp"
+        app:showAsAction="ifRoom" />
     <item
         android:id="@+id/action_settings"
         android:orderInCategory="30"

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

@@ -6,6 +6,7 @@
     <string name="action_editTabs">Edit lists</string>
     <string name="action_about">About</string>
     <string name="action_new_task">New task</string>
+    <string name="action_changeLayout">Change layout</string>
     <string name="settings_activity_title">Settings</string>
 
     <!-- Strings related to Task List edition -->