Add saving the current tab between application launches.

Mimic the Contacts app behaviour basically.

Change-Id: Ib0579d26c105629cfe59620f996689a949bad073

android/sdremote/src/org/libreoffice/impressremote/activity/ComputersActivity.java

@@ -25,6 +25,7 @@ import org.libreoffice.impressremote.util.BluetoothOperator;
 import org.libreoffice.impressremote.util.FragmentOperator;
 import org.libreoffice.impressremote.util.Intents;
 import org.libreoffice.impressremote.R;
+import org.libreoffice.impressremote.util.Preferences;
 
 public class ComputersActivity extends SherlockFragmentActivity implements ActionBar.TabListener, ViewPager.OnPageChangeListener {
     private static final class TabsIndices {
@@ -72,6 +73,8 @@ public class ComputersActivity extends SherlockFragmentActivity implements Actio
 
         setUpTabs();
         setUpComputersPager();
+
+        setUpSavedTab();
     }
 
     private void setUpTabs() {
@@ -137,6 +140,14 @@ public class ComputersActivity extends SherlockFragmentActivity implements Actio
     public void onPageScrollStateChanged(int aPosition) {
     }
 
+    private void setUpSavedTab() {
+        getSupportActionBar().setSelectedNavigationItem(loadTabIndex());
+    }
+
+    private int loadTabIndex() {
+        return Preferences.getApplicationStatesInstance(this).getInt("saved_tab");
+    }
+
     private void setUpComputersList() {
         Fragment aComputersFragment = ComputersFragment.newInstance(ComputersFragment.Type.WIFI);
 
@@ -189,6 +200,19 @@ public class ComputersActivity extends SherlockFragmentActivity implements Actio
         Intent aIntent = Intents.buildLicensesIntent(this);
         startActivity(aIntent);
     }
+
+    @Override
+    protected void onStop() {
+        super.onStop();
+
+        saveTabIndex();
+    }
+
+    private void saveTabIndex() {
+        int aTabIndex = getSupportActionBar().getSelectedNavigationIndex();
+
+        Preferences.getApplicationStatesInstance(this).setInt("saved_tab", aTabIndex);
+    }
 }
 
 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */

android/sdremote/src/org/libreoffice/impressremote/communication/PairingProvider.java

@@ -46,11 +46,11 @@ final class PairingProvider {
     }
 
     private String getSavedPin(Server aServer) {
-        return mAuthorizedServersPreferences.get(aServer.getAddress());
+        return mAuthorizedServersPreferences.getString(aServer.getAddress());
     }
 
     private void savePin(Server aServer, String aPin) {
-        mAuthorizedServersPreferences.set(aServer.getAddress(), aPin);
+        mAuthorizedServersPreferences.setString(aServer.getAddress(), aPin);
     }
 
     public static String getPairingDeviceName(Context aContext) {

android/sdremote/src/org/libreoffice/impressremote/communication/ServersManager.java

@@ -101,7 +101,7 @@ class ServersManager implements Comparator<Server> {
     }
 
     public void addTcpServer(String aAddress, String aName) {
-        mSavedServersPreferences.set(aAddress, aName);
+        mSavedServersPreferences.setString(aAddress, aName);
     }
 
     public void removeServer(Server aServer) {

android/sdremote/src/org/libreoffice/impressremote/util/Preferences.java

@@ -20,6 +20,7 @@ public final class Preferences {
 
         public static final String AUTHORIZED_SERVERS = "authorized_servers";
         public static final String SAVED_SERVERS = "saved_servers";
+        public static final String APPLICATION_STATES = "application_states";
     }
 
     private final SharedPreferences mPreferences;
@@ -40,18 +41,30 @@ public final class Preferences {
         return new Preferences(aContext, Locations.SAVED_SERVERS);
     }
 
+    public static Preferences getApplicationStatesInstance(Context aContext) {
+        return new Preferences(aContext, Locations.APPLICATION_STATES);
+    }
+
     public Map<String, ?> getAll() {
         return mPreferences.getAll();
     }
 
-    public String get(String aKey) {
+    public String getString(String aKey) {
         return mPreferences.getString(aKey, null);
     }
 
-    public void set(String aKey, String aValue) {
+    public int getInt(String aKey) {
+        return mPreferences.getInt(aKey, 0);
+    }
+
+    public void setString(String aKey, String aValue) {
         mPreferences.edit().putString(aKey, aValue).commit();
     }
 
+    public void setInt(String aKey, int aValue) {
+        mPreferences.edit().putInt(aKey, aValue).commit();
+    }
+
     public void remove(String aKey) {
         mPreferences.edit().remove(aKey).commit();
     }