update GUI changes immediately via activity result

android_app/app/src/main/java/com/health/openscale/gui/MainActivity.java

@@ -56,7 +56,7 @@ public class MainActivity extends ActionBarActivity implements
 	 * becomes too memory intensive, it may be best to switch to a
 	 * {@link android.support.v4.app.FragmentStatePagerAdapter}.
 	 */
-	public static SectionsPagerAdapter mSectionsPagerAdapter;
+	private SectionsPagerAdapter mSectionsPagerAdapter;
 
 	private static boolean firstAppStart = true;
 	private static int bluetoothStatusIcon = R.drawable.bluetooth_disabled;
@@ -149,7 +149,7 @@ public class MainActivity extends ActionBarActivity implements
 
 		if (id == R.id.action_general_settings) {
 			Intent intent = new Intent(this, SettingsActivity.class);
-			startActivityForResult(intent, 0);
+			startActivityForResult(intent, 1);
 			return true;
 		}
 
@@ -259,7 +259,15 @@ public class MainActivity extends ActionBarActivity implements
 	public void onTabReselected(ActionBar.Tab tab,
 			FragmentTransaction fragmentTransaction) {
 	}
-	
+
+	@Override
+	protected void onActivityResult(int requestCode, int resultCode, Intent data) {
+
+		if (requestCode == 1) {
+			mSectionsPagerAdapter.notifyDataSetChanged();
+		}
+	}
+
 	/**
 	 * A {@link FragmentPagerAdapter} that returns a fragment corresponding to
 	 * one of the sections/tabs/pages.
@@ -315,14 +323,15 @@ public class MainActivity extends ActionBarActivity implements
 			return null;
 		}
 
-        @Override
-        public int getItemPosition(Object object) {
-            return POSITION_NONE;
-        }
+		@Override
+		public int getItemPosition(Object object) {
+			return POSITION_NONE;
+		}
 
-        @Override
+		@Override
         public void notifyDataSetChanged() {
-            super.notifyDataSetChanged();
+			super.notifyDataSetChanged();
+
             tableFrag = new TableFragment();
             graphFrag = new GraphFragment();
             overviewFrag = new OverviewFragment();

android_app/app/src/main/java/com/health/openscale/gui/SettingsActivity.java

@@ -16,7 +16,6 @@
 package com.health.openscale.gui;
 
 import android.preference.PreferenceActivity;
-import android.util.Log;
 
 import com.health.openscale.R;
 
@@ -25,7 +24,6 @@ import java.util.List;
 
 public class SettingsActivity extends PreferenceActivity {
     private static List<String> fragments = new ArrayList<String>();
-    static int backPressed = 0;
 
     @Override
     public void onBuildHeaders(List<Header> target) {
@@ -41,13 +39,4 @@ public class SettingsActivity extends PreferenceActivity {
     protected boolean isValidFragment(String fragmentName) {
         return fragments.contains(fragmentName);
     }
-
-    public void onBackPressed() {
-        super.onBackPressed();
-        backPressed++;
-        if (backPressed == 1) {
-            MainActivity.mSectionsPagerAdapter.notifyDataSetChanged();
-            backPressed = 0;
-        }
-    }
 }