android: add toolbar button to force-show the soft keyboard

Change-Id: I1758f4db7b6894df66d721af77092754b0252100

android/experimental/LOAndroid3/res/menu/main.xml

@@ -10,6 +10,12 @@
           android:orderInCategory="100"
           app:showAsAction="always"/>
 
+    <item android:id="@+id/action_keyboard"
+          android:title="@string/action_keyboard"
+          android:icon="@drawable/ic_format_keyboard_grey600_24dp"
+          android:orderInCategory="100"
+          app:showAsAction="always"/>
+
     <item android:id="@+id/action_about"
         android:title="@string/action_about"
         android:orderInCategory="100" />

android/experimental/LOAndroid3/res/values/strings.xml

@@ -35,5 +35,6 @@
     <string name="local_documents">Local documents</string>
     <string name="local_file_system">Local file system</string>
     <string name="action_bold">Bold</string>
+    <string name="action_keyboard">Show keyboard</string>
 
 </resources>

android/experimental/LOAndroid3/src/java/org/libreoffice/LibreOfficeMainActivity.java

@@ -79,6 +79,9 @@ public class LibreOfficeMainActivity extends ActionBarActivity {
             case R.id.action_bold:
                 LOKitShell.sendEvent(new LOEvent(LOEvent.UNO_COMMAND, ".uno:Bold"));
                 return true;
+            case R.id.action_keyboard:
+                showSoftKeyboard();
+                break;
             case R.id.action_about:
                 mAbout.showAbout();
                 return true;