Updated toolbar spinner to newer implementation

Lowered all-caps navigation labels to something more professional.
Added a Spinner to the Toolbar in XML.
Reworked many lines of LibreOfficeUIActivity to remove possible NPE's, and also
removed redundant lines, which were mostly deprecated, as well as switching to
a newer implementation of a toolbar-spinner navigation pattern. There are more
deprecated methods, but I wanted them in a separate commit.

Change-Id: I15d5365ed7c00880873bf7874bc794008436bb99
Reviewed-on: https://gerrit.libreoffice.org/32497
Reviewed-by: jan iversen <jani@documentfoundation.org>
Tested-by: jan iversen <jani@documentfoundation.org>

android/source/res/layout/toolbar.xml

@@ -4,11 +4,18 @@
     android:id="@+id/toolbar"
     xmlns:app="http://schemas.android.com/apk/res-auto"
     xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
     android:layout_width="match_parent"
     android:layout_height="wrap_content"
     android:elevation="3dp"
     android:background="@color/toolbar_background"
     app:theme="@style/LibreOfficeTheme.Toolbar"
+    tools:theme="@style/LibreOfficeTheme.Toolbar"
     app:popupTheme="@style/LibreOfficeTheme">
 
+    <android.support.v7.widget.AppCompatSpinner
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:id="@+id/toolbar_spinner"/>
+
 </android.support.v7.widget.Toolbar>

android/source/res/values/arrays.xml

@@ -33,11 +33,11 @@
     <!-- Preference Name Arrays
          This has to be in sync with FileUtilities.java. -->
     <string-array name="file_view_modes">
-        <item >EVERYTHING</item>
+        <item>Everything</item>
-        <item >DOCUMENTS</item>
+        <item>Documents</item>
-        <item>SPREADSHEETS</item>
+        <item>Spreadsheets</item>
-        <item >PRESENTATIONS</item>
+        <item>Presentations</item>
-        <item>DRAWINGS</item>
+        <item>Drawings</item>
     </string-array>
 
     <string-array name="FilterTypeNames">

android/source/src/java/org/libreoffice/ui/LibreOfficeUIActivity.java

@@ -24,6 +24,7 @@ import android.support.v4.widget.DrawerLayout;
 import android.support.v7.app.ActionBar;
 import android.support.v7.app.ActionBarDrawerToggle;
 import android.support.v7.app.AppCompatActivity;
+import android.support.v7.widget.AppCompatSpinner;
 import android.support.v7.widget.Toolbar;
 import android.util.Log;
 import android.view.ContextMenu;
@@ -66,7 +67,7 @@ import java.text.SimpleDateFormat;
 import java.util.Date;
 import java.util.List;
 
-public class LibreOfficeUIActivity extends AppCompatActivity implements ActionBar.OnNavigationListener {
+public class LibreOfficeUIActivity extends AppCompatActivity {
     private String LOGTAG = LibreOfficeUIActivity.class.getSimpleName();
     private SharedPreferences prefs;
     private int filterMode = FileUtilities.ALL;
@@ -128,19 +129,34 @@ public class LibreOfficeUIActivity extends AppCompatActivity implements ActionBa
         Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
         setSupportActionBar(toolbar);
         ActionBar actionBar = getSupportActionBar();
-        actionBar.setDisplayShowTitleEnabled(false); //This should show current directory if anything
+
+        if (actionBar != null) {
+            actionBar.setDisplayShowTitleEnabled(false);
             actionBar.setDisplayHomeAsUpEnabled(true);
 
             //make the navigation spinner
             Context context = actionBar.getThemedContext();
-        ArrayAdapter<CharSequence> list = ArrayAdapter.createFromResource(context, R.array.file_view_modes, android.R.layout.simple_spinner_item);
+            AppCompatSpinner toolbarSpinner = (AppCompatSpinner) findViewById(R.id.toolbar_spinner);
-        list.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
+            ArrayAdapter<CharSequence> spinnerAdapter = ArrayAdapter.createFromResource(context, R.array.file_view_modes, android.R.layout.simple_spinner_item);
+            spinnerAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
+            toolbarSpinner.setAdapter(spinnerAdapter);
+            toolbarSpinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
+                @Override
+                public void onItemSelected(AdapterView<?> adapterView, View view, int pos, long id) {
+                    filterMode = pos -1; //bit of a hack, I know. -1 is ALL 0 Docs etc
+                    openDirectory(currentDirectory);// Uses filter mode
+                }
+
+                @Override
+                public void onNothingSelected(AdapterView<?> adapterView) {
+                    filterMode = FileUtilities.ALL;
+                    openDirectory(currentDirectory);
+                }
+            });
+        }
 
-        actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_LIST);
-        actionBar.setListNavigationCallbacks(list, this);
 
         LinearLayout content = (LinearLayout) findViewById(R.id.browser_main_content);
-
         if (viewMode == GRID_VIEW) {
             // code to make a grid view
             getLayoutInflater().inflate(R.layout.file_grid, content);
@@ -151,13 +167,13 @@ public class LibreOfficeUIActivity extends AppCompatActivity implements ActionBa
                     open(position);
                 }
             });
-            actionBar.setSelectedNavigationItem(filterMode + 1);//This triggers the listener which modifies the view.
+            openDirectory(currentDirectory);
             registerForContextMenu(gv);
         } else {
             getLayoutInflater().inflate(R.layout.file_list, content);
             lv = (ListView)findViewById(R.id.file_explorer_list_view);
             lv.setClickable(true);
-            actionBar.setSelectedNavigationItem(filterMode + 1);
+            openDirectory(currentDirectory);
             registerForContextMenu(lv);
         }
 
@@ -678,12 +694,6 @@ public class LibreOfficeUIActivity extends AppCompatActivity implements ActionBa
         Log.d(LOGTAG, "onDestroy");
     }
 
-    public boolean onNavigationItemSelected(int itemPosition, long itemId) {
-        filterMode = itemPosition -1; //bit of a hack, I know. -1 is ALL 0 Docs etc
-        openDirectory(currentDirectory);// Uses filter mode
-        return true;
-    }
-
     private int dpToPx(int dp){
         final float scale = getApplicationContext().getResources().getDisplayMetrics().density;
         return (int) (dp * scale + 0.5f);