Settings : Add hooks for device specific features

Add support for :

Devices with bluetooth input peripherals
Devices with screen gesture support
Devices with a back touchpad

Change-Id: Ia4835c69a8ba8fb76597e0ab0540f8ef1ed6e322

4 files changed, 100 insertions, 1 deletions

diff --git a/src/com/android/settings/ButtonSettings.java b/src/com/android/settings/ButtonSettings.java
index 5ddfab15c..6cb6895c6 100644
--- a/src/com/android/settings/ButtonSettings.java
+++ b/src/com/android/settings/ButtonSettings.java
@@ -65,6 +65,7 @@ public class ButtonSettings extends SettingsPreferenceFragment implements
     private static final String KEY_NAVIGATION_BAR_LEFT = "navigation_bar_left";
     private static final String KEY_POWER_END_CALL = "power_end_call";
     private static final String KEY_HOME_ANSWER_CALL = "home_answer_call";
+    private static final String KEY_BLUETOOTH_INPUT_SETTINGS = "bluetooth_input_settings";
 
     private static final String CATEGORY_POWER = "power_key";
     private static final String CATEGORY_HOME = "home_key";
@@ -362,6 +363,9 @@ public class ButtonSettings extends SettingsPreferenceFragment implements
         if (!backlight.isButtonSupported() && !backlight.isKeyboardSupported()) {
             prefScreen.removePreference(backlight);
         }
+
+        Utils.updatePreferenceToSpecificActivityFromMetaDataOrRemove(getActivity(),
+                getPreferenceScreen(), KEY_BLUETOOTH_INPUT_SETTINGS);
     }
 
     @Override
diff --git a/src/com/android/settings/SettingsActivity.java b/src/com/android/settings/SettingsActivity.java
index 09d97a6fd..d9ff0c386 100644
--- a/src/com/android/settings/SettingsActivity.java
+++ b/src/com/android/settings/SettingsActivity.java
@@ -1245,7 +1245,8 @@ public class SettingsActivity extends Activity
                 DashboardTile tile = category.getTile(n);
                 boolean removeTile = false;
                 id = (int) tile.id;
-                if (id == R.id.operator_settings || id == R.id.manufacturer_settings) {
+                if (id == R.id.operator_settings || id == R.id.manufacturer_settings
+                        || id == R.id.device_specific_gesture_settings) {
                     if (!Utils.updateTileToSpecificActivityFromMetaDataOrRemove(this, tile)) {
                         removeTile = true;
                     }
diff --git a/src/com/android/settings/Utils.java b/src/com/android/settings/Utils.java
index 075194a6e..b1170c846 100644
--- a/src/com/android/settings/Utils.java
+++ b/src/com/android/settings/Utils.java
@@ -223,6 +223,98 @@ public final class Utils {
         return false;
     }
 
+    /**
+     * Finds a matching activity for a preference's intent. If a matching
+     * activity is not found, it will remove the preference. The icon, title and
+     * summary of the preference will also be updated with the values retrieved
+     * from the activity's meta-data elements. If no meta-data elements are
+     * specified then the preference title will be set to match the label of the
+     * activity, an icon and summary text will not be displayed.
+     *
+     * @param context The context.
+     * @param parentPreferenceGroup The preference group that contains the
+     *            preference whose intent is being resolved.
+     * @param preferenceKey The key of the preference whose intent is being
+     *            resolved.
+     *
+     * @return Whether an activity was found. If false, the preference was
+     *         removed.
+     *
+     * @see {@link #META_DATA_PREFERENCE_ICON}
+     *      {@link #META_DATA_PREFERENCE_TITLE}
+     *      {@link #META_DATA_PREFERENCE_SUMMARY}
+     */
+    public static boolean updatePreferenceToSpecificActivityFromMetaDataOrRemove(Context context,
+            PreferenceGroup parentPreferenceGroup, String preferenceKey) {
+
+        Preference preference = parentPreferenceGroup.findPreference(preferenceKey);
+        if (preference == null) {
+            return false;
+        }
+
+        Intent intent = preference.getIntent();
+        if (intent != null) {
+            // Find the activity that is in the system image
+            PackageManager pm = context.getPackageManager();
+            List<ResolveInfo> list = pm.queryIntentActivities(intent, PackageManager.GET_META_DATA);
+            int listSize = list.size();
+            for (int i = 0; i < listSize; i++) {
+                ResolveInfo resolveInfo = list.get(i);
+                if ((resolveInfo.activityInfo.applicationInfo.flags
+                        & ApplicationInfo.FLAG_SYSTEM) != 0) {
+                    Drawable icon = null;
+                    String title = null;
+                    String summary = null;
+
+                    // Get the activity's meta-data
+                    try {
+                        Resources res = pm
+                                .getResourcesForApplication(resolveInfo.activityInfo.packageName);
+                        Bundle metaData = resolveInfo.activityInfo.metaData;
+
+                        if (res != null && metaData != null) {
+                            if (preference instanceof IconPreferenceScreen) {
+                                icon = res.getDrawable(metaData.getInt(META_DATA_PREFERENCE_ICON));
+                            }
+                            title = res.getString(metaData.getInt(META_DATA_PREFERENCE_TITLE));
+                            summary = res.getString(metaData.getInt(META_DATA_PREFERENCE_SUMMARY));
+                        }
+                    } catch (NameNotFoundException e) {
+                        // Ignore
+                    } catch (NotFoundException e) {
+                        // Ignore
+                    }
+
+                    // Set the preference title to the activity's label if no
+                    // meta-data is found
+                    if (TextUtils.isEmpty(title)) {
+                        title = resolveInfo.loadLabel(pm).toString();
+                    }
+
+                    // Set icon, title and summary for the preference
+                    preference.setTitle(title);
+                    preference.setSummary(summary);
+                    if (preference instanceof IconPreferenceScreen) {
+                        IconPreferenceScreen iconPreference = (IconPreferenceScreen) preference;
+                        iconPreference.setIcon(icon);
+                    }
+
+                    // Replace the intent with this specific activity
+                    preference.setIntent(new Intent().setClassName(
+                            resolveInfo.activityInfo.packageName,
+                            resolveInfo.activityInfo.name));
+
+                   return true;
+                }
+            }
+        }
+
+        // Did not find a matching activity, so remove the preference
+        parentPreferenceGroup.removePreference(preference);
+
+        return false;
+    }
+
     public static boolean updateTileToSpecificActivityFromMetaDataOrRemove(Context context,
             DashboardTile tile) {
 
diff --git a/src/com/android/settings/inputmethod/InputMethodAndLanguageSettings.java b/src/com/android/settings/inputmethod/InputMethodAndLanguageSettings.java
index e8ef5ef34..7d39fa174 100644
--- a/src/com/android/settings/inputmethod/InputMethodAndLanguageSettings.java
+++ b/src/com/android/settings/inputmethod/InputMethodAndLanguageSettings.java
@@ -84,6 +84,8 @@ public class InputMethodAndLanguageSettings extends SettingsPreferenceFragment
     private static final String KEY_INPUT_METHOD_SELECTOR = "input_method_selector";
     private static final String KEY_USER_DICTIONARY_SETTINGS = "key_user_dictionary_settings";
     private static final String KEY_PREVIOUSLY_ENABLED_SUBTYPES = "previously_enabled_subtypes";
+    private static final String KEY_TRACKPAD_SETTINGS = "gesture_pad_settings";
+
     // false: on ICS or later
     private static final boolean SHOW_INPUT_METHOD_SWITCHER_SETTINGS = false;