Remove unnecessary code from Settings activity

app/src/main/java/de/rumpold/androiddsky/ui/SettingsActivity.java

@@ -4,9 +4,6 @@ import android.annotation.TargetApi;
 import android.content.Context;
 import android.content.Intent;
 import android.content.res.Configuration;
-import android.media.Ringtone;
-import android.media.RingtoneManager;
-import android.net.Uri;
 import android.os.Build;
 import android.os.Bundle;
 import android.preference.ListPreference;
@@ -14,9 +11,7 @@ import android.preference.Preference;
 import android.preference.PreferenceActivity;
 import android.preference.PreferenceFragment;
 import android.preference.PreferenceManager;
-import android.preference.RingtonePreference;
 import android.support.v7.app.ActionBar;
-import android.text.TextUtils;
 import android.view.MenuItem;
 
 import java.util.List;
@@ -57,28 +52,6 @@ public class SettingsActivity extends AppCompatPreferenceActivity {
                                 ? listPreference.getEntries()[index]
                                 : null);
 
-            } else if (preference instanceof RingtonePreference) {
-                // For ringtone preferences, look up the correct display value
-                // using RingtoneManager.
-                if (TextUtils.isEmpty(stringValue)) {
-                    // Empty values correspond to 'silent' (no ringtone).
-                    preference.setSummary(R.string.pref_ringtone_silent);
-
-                } else {
-                    Ringtone ringtone = RingtoneManager.getRingtone(
-                            preference.getContext(), Uri.parse(stringValue));
-
-                    if (ringtone == null) {
-                        // Clear the summary if there was a lookup error.
-                        preference.setSummary(null);
-                    } else {
-                        // Set the summary to reflect the new ringtone display
-                        // name.
-                        String name = ringtone.getTitle(preference.getContext());
-                        preference.setSummary(name);
-                    }
-                }
-
             } else {
                 // For all other preferences, set the summary to the value's
                 // simple string representation.

app/src/main/res/values/strings.xml

@@ -7,4 +7,5 @@
     <string name="pref_description_auto_connect">Automatically connect to remote VirtualAGC when launching the app?</string>
     <string name="pref_title_agc_host">VirtualAGC host</string>
     <string name="pref_title_agc_port">VirtualAGC port</string>
+    <string name="pref_header_general">General</string>
 </resources>