1) created a new string constant for 'Passphrase'.

2) modified 'App protection' preference group summary to be more verbose.
3) dropped the colons from 'Appearance' preference group summary.
4) dropped the colons from and 'SMS and MMS' preference group summary.

res/values/strings.xml

@@ -39,8 +39,8 @@
     <string name="ApplicationPreferencesActivity_partial">partial</string>
     <string name="ApplicationPreferencesActivity_sms">SMS</string>
     <string name="ApplicationPreferencesActivity_mms">MMS</string>
-    <string name="ApplicationPreferencesActivity_incoming_sms">Incoming</string>
-    <string name="ApplicationPreferencesActivity_outgoing_sms">outgoing</string>
+    <string name="ApplicationPreferencesActivity_incoming_sms_summary">Incoming %s</string>
+    <string name="ApplicationPreferencesActivity_outgoing_sms_summary">outgoing %s</string>
 
     <!-- AppProtectionPreferenceFragment -->
     <string name="AppProtectionPreferenceFragment_minutes">%d minutes</string>
@@ -723,8 +723,10 @@
     <string name="preferences__change_my_passphrase">Change my passphrase</string>
     <string name="preferences__complete_key_exchanges">Complete key exchanges</string>
     <string name="preferences__enable_passphrase">Enable passphrase</string>
+    <string name="preferences__passphrase_summary">Passphrase %s</string>
     <string name="preferences__enable_local_encryption_of_messages_and_keys">Enable local encryption of messages and keys</string>
     <string name="preferences__screen_security">Screen security</string>
+    <string name="preferences__screen_security_summary">Screen security %s</string>
     <string name="preferences__automatically_complete_key_exchanges_for_new_sessions_or_for_existing_sessions_with_the_same_identity_key">Automatically complete key exchanges for new sessions or for existing sessions with the same identity key</string>
     <string name="preferences__disable_screen_security_to_allow_screen_shots">Block screenshots in the recents list and inside the app</string>
     <string name="preferences__forget_passphrase_from_memory_after_some_interval">Forget passphrase from memory after some interval</string>
@@ -789,8 +791,10 @@
     <string name="preferences__dark_theme">Dark</string>
     <string name="preferences__appearance">Appearance</string>
     <string name="preferences__theme">Theme</string>
+    <string name="preferences__theme_summary">Theme %s</string>
     <string name="preferences__default">Default</string>
     <string name="preferences__language">Language</string>
+    <string name="preferences__language_summary">Language %s</string>
     <string name="preferences__make_default_sms_app">Set as default SMS app</string>
     <string name="preferences__make_textsecure_the_default_sms_mms_app">Make TextSecure the default SMS/MMS application for your system.</string>
     <string name="preferences__use_data_channel">Push messages</string>

src/org/thoughtcrime/securesms/preferences/AppProtectionPreferenceFragment.java

@@ -11,7 +11,6 @@ import android.preference.CheckBoxPreference;
 import android.preference.Preference;
 import android.preference.PreferenceScreen;
 import android.support.v4.preference.PreferenceFragment;
-import android.util.Log;
 import android.widget.Toast;
 
 import com.doomonafireball.betterpickers.hmspicker.HmsPickerBuilder;
@@ -153,10 +152,31 @@ public class AppProtectionPreferenceFragment extends PreferenceFragment {
     }
   }
 
-  public static CharSequence getSummary(Context context) {
-    final int onCapsResId  = R.string.ApplicationPreferencesActivity_On;
-    final int offCapsResId = R.string.ApplicationPreferencesActivity_Off;
+  private static CharSequence getPassphraseSummary(Context context) {
+    final int    passphraseResId = R.string.preferences__passphrase_summary;
+    final String onRes           = context.getString(R.string.ApplicationPreferencesActivity_on);
+    final String offRes          = context.getString(R.string.ApplicationPreferencesActivity_off);
+
+    if (TextSecurePreferences.isPasswordDisabled(context)) {
+      return context.getString(passphraseResId, offRes);
+    } else {
+      return context.getString(passphraseResId, onRes);
+    }
+  }
+
+  private static CharSequence getScreenSecuritySummary(Context context) {
+    final int    screenSecurityResId = R.string.preferences__screen_security_summary;
+    final String onRes               = context.getString(R.string.ApplicationPreferencesActivity_on);
+    final String offRes              = context.getString(R.string.ApplicationPreferencesActivity_off);
 
-    return context.getString(TextSecurePreferences.isPasswordDisabled(context) ? offCapsResId : onCapsResId);
+    if (TextSecurePreferences.isScreenSecurityEnabled(context)) {
+      return context.getString(screenSecurityResId, onRes);
+    } else {
+      return context.getString(screenSecurityResId, offRes);
+    }
+  }
+
+  public static CharSequence getSummary(Context context) {
+    return getPassphraseSummary(context) + ", " + getScreenSecuritySummary(context);
   }
 }

src/org/thoughtcrime/securesms/preferences/AppearancePreferenceFragment.java

@@ -50,7 +50,7 @@ public class AppearancePreferenceFragment extends ListSummaryPreferenceFragment
     int langIndex  = Arrays.asList(languageEntryValues).indexOf(TextSecurePreferences.getLanguage(context));
     int themeIndex = Arrays.asList(themeEntryValues).indexOf(TextSecurePreferences.getTheme(context));
 
-    return context.getString(R.string.preferences__theme)    + ": " + themeEntries[themeIndex] + ", " +
-           context.getString(R.string.preferences__language) + ": " + languageEntries[langIndex];
+    return context.getString(R.string.preferences__theme_summary,    themeEntries[themeIndex]) + ", " +
+           context.getString(R.string.preferences__language_summary, languageEntries[langIndex]);
   }
 }

src/org/thoughtcrime/securesms/preferences/SmsMmsPreferenceFragment.java

@@ -146,7 +146,7 @@ public class SmsMmsPreferenceFragment extends PreferenceFragment {
     final int offResId         = R.string.ApplicationPreferencesActivity_off;
     final int smsResId         = R.string.ApplicationPreferencesActivity_sms;
     final int mmsResId         = R.string.ApplicationPreferencesActivity_mms;
-    final int incomingSmsResId = R.string.ApplicationPreferencesActivity_incoming_sms;
+    final int incomingSmsResId = R.string.ApplicationPreferencesActivity_incoming_sms_summary;
 
     final int incomingSmsSummary;
     boolean postKitkatSMS = Util.isDefaultSmsProvider(context);
@@ -161,14 +161,14 @@ public class SmsMmsPreferenceFragment extends PreferenceFragment {
       else if (!preKitkatSMS && preKitkatMMS) incomingSmsSummary = mmsResId;
       else                                    incomingSmsSummary = offResId;
     }
-    return context.getString(incomingSmsResId) + ": " + context.getString(incomingSmsSummary);
+    return context.getString(incomingSmsResId, context.getString(incomingSmsSummary));
   }
 
   private static CharSequence getOutgoingSmsSummary(Context context) {
     final int onResId          = R.string.ApplicationPreferencesActivity_on;
     final int offResId         = R.string.ApplicationPreferencesActivity_off;
     final int partialResId     = R.string.ApplicationPreferencesActivity_partial;
-    final int outgoingSmsResId = R.string.ApplicationPreferencesActivity_outgoing_sms;
+    final int outgoingSmsResId = R.string.ApplicationPreferencesActivity_outgoing_sms_summary;
 
     final int outgoingSmsSummary;
     if (TextSecurePreferences.isFallbackSmsAllowed(context) && TextSecurePreferences.isDirectSmsAllowed(context)) {
@@ -178,6 +178,6 @@ public class SmsMmsPreferenceFragment extends PreferenceFragment {
     } else {
       outgoingSmsSummary = offResId;
     }
-    return context.getString(outgoingSmsResId) + ": " + context.getString(outgoingSmsSummary);
+    return context.getString(outgoingSmsResId, context.getString(outgoingSmsSummary));
   }
 }