Android: settings activity for document providers

Creates an activity to manage the settings of any document provider
that needs them, and populated it with the settings required by the
ownCloud implementation.

The settings screen is not yet plugged to the document browser UI but
can be launched with this command:

  adb shell am start -a android.intent.action.MAIN \
  -n org.libreoffice/.storage.DocumentProviderSettingsActivity

Change-Id: I83cff641fa61078f2bddbb98262af989c06985a9
Reviewed-on: https://gerrit.libreoffice.org/16193Reviewed-by: Jacobo Aragunde Pérez <jaragunde@igalia.com>
Tested-by: Jacobo Aragunde Pérez <jaragunde@igalia.com>

android/source/AndroidManifest.xml.in

@@ -106,6 +106,14 @@
             </intent-filter>
         </activity>
 
+        <!-- Document Provider Settings Activity -->
+        <activity android:name=".storage.DocumentProviderSettingsActivity"
+                  android:label="@string/storage_provider_settings">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+            </intent-filter>
+        </activity>
+
     </application>
 
 </manifest>

android/source/res/values/strings.xml

@@ -57,4 +57,12 @@
     <string name="action_keyboard">Show keyboard</string>
     <string name="action_save">Save</string>
 
+    <!-- Document provider settings -->
+    <string name="storage_provider_settings">Storage provider settings</string>
+    <string name="owncloud_settings">ownCloud settings</string>
+    <string name="server_url">Server URL</string>
+    <string name="server_url_and_port">URL and port of the ownCloud server.</string>
+    <string name="user_name">User name</string>
+    <string name="password">Password</string>
+
 </resources>

android/source/res/xml/documentprovider_preferences.xml

+<?xml version="1.0" encoding="utf-8"?>
+<!--
+ This file is part of the LibreOffice project.
+ This Source Code Form is subject to the terms of the Mozilla Public
+ License, v. 2.0. If a copy of the MPL was not distributed with this
+ file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ -->
+<PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android">
+    <PreferenceCategory
+        android:title="@string/owncloud_settings"
+        android:key="pref_key_owncloud_settings">
+        <EditTextPreference
+            android:key="pref_server_url"
+            android:title="@string/server_url"
+            android:summary="@string/server_url_and_port"
+            android:defaultValue="http://" />
+        <EditTextPreference
+            android:key="pref_user_name"
+            android:title="@string/user_name"
+            android:defaultValue="" />
+        <EditTextPreference
+            android:key="pref_password"
+            android:title="@string/password"
+            android:defaultValue="" />
+    </PreferenceCategory>
+</PreferenceScreen>

android/source/src/java/org/libreoffice/storage/DocumentProviderSettingsActivity.java

+/* -*- tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+package org.libreoffice.storage;
+
+import org.libreoffice.R;
+
+import android.app.Activity;
+import android.os.Bundle;
+import android.preference.PreferenceFragment;
+
+public class DocumentProviderSettingsActivity extends Activity {
+    @Override
+    public void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+
+        // Display the fragment as the main content.
+        getFragmentManager().beginTransaction()
+                .replace(android.R.id.content, new SettingsFragment()).commit();
+    }
+
+    public static class SettingsFragment extends PreferenceFragment {
+        @Override
+        public void onCreate(Bundle savedInstanceState) {
+            super.onCreate(savedInstanceState);
+
+            // Load the preferences from an XML resource
+            addPreferencesFromResource(R.xml.documentprovider_preferences);
+        }
+    }
+}

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

@@ -108,7 +108,10 @@ public class LibreOfficeUIActivity extends ActionBarActivity implements ActionBa
         DocumentProviderFactory.initialize(this);
         documentProviderFactory = DocumentProviderFactory.getInstance();
 
+        PreferenceManager.setDefaultValues(this, R.xml.documentprovider_preferences, false);
+
         readPreferences();
+
         // init UI and populate with contents from the provider
         createUI();
         switchToDocumentProvider(documentProviderFactory.getDefaultProvider());