Mass clean up: don't cast class when not needed.

Bug: none
Test: rebuild
Change-Id: Ie3f58a3d5ae99ade28a33dcac80c18de90d4d5b2

src/com/android/settings/accounts/AccountHeaderPreferenceController.java

@@ -84,7 +84,7 @@ public class AccountHeaderPreferenceController extends AbstractPreferenceControl
     @Override
     public void displayPreference(PreferenceScreen screen) {
         super.displayPreference(screen);
-        mHeaderPreference = (LayoutPreference) screen.findPreference(KEY_ACCOUNT_HEADER);
+        mHeaderPreference = screen.findPreference(KEY_ACCOUNT_HEADER);
     }
 
     @Override

src/com/android/settings/accounts/RemoveAccountPreferenceController.java

@@ -66,8 +66,7 @@ public class RemoveAccountPreferenceController extends AbstractPreferenceControl
     @Override
     public void displayPreference(PreferenceScreen screen) {
         super.displayPreference(screen);
-        final LayoutPreference removeAccountPreference =
+        final LayoutPreference removeAccountPreference = screen.findPreference(KEY_REMOVE_ACCOUNT);
-                (LayoutPreference) screen.findPreference(KEY_REMOVE_ACCOUNT);
         Button removeAccountButton = (Button) removeAccountPreference.findViewById(R.id.button);
         removeAccountButton.setOnClickListener(this);
     }

src/com/android/settings/applications/RecentAppsPreferenceController.java

@@ -138,7 +138,7 @@ public class RecentAppsPreferenceController extends AbstractPreferenceController
 
     @Override
     public void displayPreference(PreferenceScreen screen) {
-        mCategory = (PreferenceCategory) screen.findPreference(getPreferenceKey());
+        mCategory = screen.findPreference(getPreferenceKey());
         mSeeAllPref = screen.findPreference(KEY_SEE_ALL);
         mDivider = screen.findPreference(KEY_DIVIDER);
         super.displayPreference(screen);

src/com/android/settings/applications/appinfo/AppHeaderViewPreferenceController.java

@@ -63,7 +63,7 @@ public class AppHeaderViewPreferenceController extends BasePreferenceController
     @Override
     public void displayPreference(PreferenceScreen screen) {
         super.displayPreference(screen);
-        mHeader = (LayoutPreference) screen.findPreference(KEY_HEADER);
+        mHeader = screen.findPreference(KEY_HEADER);
         final Activity activity = mParent.getActivity();
         mEntityHeaderController = EntityHeaderController
                 .newInstance(activity, mParent, mHeader.findViewById(R.id.entity_header))

src/com/android/settings/applications/appinfo/InstantAppButtonsPreferenceController.java

@@ -77,7 +77,7 @@ public class InstantAppButtonsPreferenceController extends BasePreferenceControl
     @Override
     public void displayPreference(PreferenceScreen screen) {
         super.displayPreference(screen);
-        mPreference = (LayoutPreference) screen.findPreference(KEY_INSTANT_APP_BUTTONS);
+        mPreference = screen.findPreference(KEY_INSTANT_APP_BUTTONS);
         initButtons(mPreference.findViewById(R.id.instant_app_button_container));
     }
 

src/com/android/settings/applications/managedomainurls/DomainAppPreferenceController.java

@@ -63,7 +63,7 @@ public class DomainAppPreferenceController extends BasePreferenceController impl
     @Override
     public void displayPreference(PreferenceScreen screen) {
         super.displayPreference(screen);
-        mDomainAppList = (PreferenceGroup) screen.findPreference(getPreferenceKey());
+        mDomainAppList = screen.findPreference(getPreferenceKey());
     }
 
     @Override

src/com/android/settings/applications/specialaccess/deviceadmin/DeviceAdminListPreferenceController.java

@@ -116,7 +116,7 @@ public class DeviceAdminListPreferenceController extends BasePreferenceControlle
     @Override
     public void displayPreference(PreferenceScreen screen) {
         super.displayPreference(screen);
-        mPreferenceGroup = (PreferenceGroup) screen.findPreference(getPreferenceKey());
+        mPreferenceGroup = screen.findPreference(getPreferenceKey());
     }
 
     @Override

src/com/android/settings/biometrics/face/FaceSettingsAttentionPreferenceController.java

@@ -56,7 +56,7 @@ public class FaceSettingsAttentionPreferenceController extends TogglePreferenceC
     @Override
     public void displayPreference(PreferenceScreen screen) {
         super.displayPreference(screen);
-        mPreference = (SwitchPreference) screen.findPreference(KEY);
+        mPreference = screen.findPreference(KEY);
     }
 
     @Override

src/com/android/settings/biometrics/face/FaceSettingsVideoPreferenceController.java

@@ -44,7 +44,7 @@ public class FaceSettingsVideoPreferenceController extends VideoPreferenceContro
     @Override
     public void displayPreference(PreferenceScreen screen) {
         super.displayPreference(screen);
-        mVideoPreference = (VideoPreference) screen.findPreference(KEY_VIDEO);
+        mVideoPreference = screen.findPreference(KEY_VIDEO);
         mVideoPreference.onViewVisible(false /* paused */);
     }
 }

src/com/android/settings/bluetooth/BluetoothDetailsHeaderController.java

@@ -52,8 +52,7 @@ public class BluetoothDetailsHeaderController extends BluetoothDetailsController
 
     @Override
     protected void init(PreferenceScreen screen) {
-        final LayoutPreference headerPreference =
+        final LayoutPreference headerPreference = screen.findPreference(KEY_DEVICE_HEADER);
-                (LayoutPreference) screen.findPreference(KEY_DEVICE_HEADER);
         mHeaderController = EntityHeaderController.newInstance(mFragment.getActivity(), mFragment,
                 headerPreference.findViewById(R.id.entity_header));
         screen.addPreference(headerPreference);

src/com/android/settings/connecteddevice/AddDevicePreferenceController.java

@@ -68,7 +68,7 @@ public class AddDevicePreferenceController extends BasePreferenceController
     public void displayPreference(PreferenceScreen screen) {
         super.displayPreference(screen);
         if (isAvailable()) {
-            mPreference = (Preference) screen.findPreference(getPreferenceKey());
+            mPreference = screen.findPreference(getPreferenceKey());
         }
     }
 

src/com/android/settings/connecteddevice/AvailableMediaDeviceGroupController.java

@@ -84,7 +84,7 @@ public class AvailableMediaDeviceGroupController extends BasePreferenceControlle
     public void displayPreference(PreferenceScreen screen) {
         super.displayPreference(screen);
         if (isAvailable()) {
-            mPreferenceGroup = (PreferenceGroup) screen.findPreference(KEY);
+            mPreferenceGroup = screen.findPreference(KEY);
             mPreferenceGroup.setVisible(false);
             updateTitle();
             mBluetoothDeviceUpdater.setPrefContext(screen.getContext());

src/com/android/settings/connecteddevice/ConnectedDeviceGroupController.java

@@ -74,7 +74,7 @@ public class ConnectedDeviceGroupController extends BasePreferenceController
     public void displayPreference(PreferenceScreen screen) {
         super.displayPreference(screen);
         if (isAvailable()) {
-            mPreferenceGroup = (PreferenceGroup) screen.findPreference(KEY);
+            mPreferenceGroup = screen.findPreference(KEY);
             mPreferenceGroup.setVisible(false);
 
             final Context context = screen.getContext();

src/com/android/settings/connecteddevice/PreviouslyConnectedDevicePreferenceController.java

@@ -60,7 +60,7 @@ public class PreviouslyConnectedDevicePreferenceController extends BasePreferenc
     @Override
     public void displayPreference(PreferenceScreen screen) {
         super.displayPreference(screen);
-        mPreferenceGroup = (PreferenceGroup) screen.findPreference(getPreferenceKey());
+        mPreferenceGroup = screen.findPreference(getPreferenceKey());
         mPreferenceGroup.setVisible(false);
 
         if (isAvailable()) {

src/com/android/settings/connecteddevice/SavedDeviceGroupController.java

@@ -74,7 +74,7 @@ public class SavedDeviceGroupController extends BasePreferenceController
     @Override
     public void displayPreference(PreferenceScreen screen) {
         if (isAvailable()) {
-            mPreferenceGroup = (PreferenceGroup) screen.findPreference(KEY);
+            mPreferenceGroup = screen.findPreference(KEY);
             mPreferenceGroup.setVisible(false);
 
             final Context context = screen.getContext();

src/com/android/settings/connecteddevice/usb/UsbDetailsDataRoleController.java

@@ -57,7 +57,7 @@ public class UsbDetailsDataRoleController extends UsbDetailsController
     @Override
     public void displayPreference(PreferenceScreen screen) {
         super.displayPreference(screen);
-        mPreferenceCategory = (PreferenceCategory) screen.findPreference(getPreferenceKey());
+        mPreferenceCategory = screen.findPreference(getPreferenceKey());
         mHostPref = makeRadioPreference(UsbBackend.dataRoleToString(DATA_ROLE_HOST),
                 R.string.usb_control_host);
         mDevicePref = makeRadioPreference(UsbBackend.dataRoleToString(DATA_ROLE_DEVICE),
@@ -74,7 +74,7 @@ public class UsbDetailsDataRoleController extends UsbDetailsController
             mDevicePref.setChecked(false);
             mHostPref.setChecked(true);
             mPreferenceCategory.setEnabled(true);
-        } else if (!connected || dataRole == DATA_ROLE_NONE){
+        } else if (!connected || dataRole == DATA_ROLE_NONE) {
             mPreferenceCategory.setEnabled(false);
             if (mNextRolePref == null) {
                 // Disconnected with no operation pending, so clear subtexts

src/com/android/settings/connecteddevice/usb/UsbDetailsFunctionsController.java

@@ -68,14 +68,14 @@ public class UsbDetailsFunctionsController extends UsbDetailsController
     @Override
     public void displayPreference(PreferenceScreen screen) {
         super.displayPreference(screen);
-        mProfilesContainer = (PreferenceCategory) screen.findPreference(getPreferenceKey());
+        mProfilesContainer = screen.findPreference(getPreferenceKey());
     }
 
     /**
      * Gets a switch preference for the particular option, creating it if needed.
      */
     private RadioButtonPreference getProfilePreference(String key, int titleId) {
-        RadioButtonPreference pref = (RadioButtonPreference) mProfilesContainer.findPreference(key);
+        RadioButtonPreference pref = mProfilesContainer.findPreference(key);
         if (pref == null) {
             pref = new RadioButtonPreference(mProfilesContainer.getContext());
             pref.setKey(key);

src/com/android/settings/connecteddevice/usb/UsbDetailsHeaderController.java

@@ -40,8 +40,7 @@ public class UsbDetailsHeaderController extends UsbDetailsController {
     @Override
     public void displayPreference(PreferenceScreen screen) {
         super.displayPreference(screen);
-        final LayoutPreference headerPreference =
+        final LayoutPreference headerPreference = screen.findPreference(KEY_DEVICE_HEADER);
-                (LayoutPreference) screen.findPreference(KEY_DEVICE_HEADER);
         mHeaderController = EntityHeaderController.newInstance(mFragment.getActivity(), mFragment,
                 headerPreference.findViewById(R.id.entity_header));
     }

src/com/android/settings/connecteddevice/usb/UsbDetailsPowerRoleController.java

@@ -58,7 +58,7 @@ public class UsbDetailsPowerRoleController extends UsbDetailsController
     @Override
     public void displayPreference(PreferenceScreen screen) {
         super.displayPreference(screen);
-        mPreferenceCategory = (PreferenceCategory) screen.findPreference(getPreferenceKey());
+        mPreferenceCategory = screen.findPreference(getPreferenceKey());
         mSwitchPreference = new SwitchPreference(mPreferenceCategory.getContext());
         mSwitchPreference.setTitle(R.string.usb_use_power_only);
         mSwitchPreference.setOnPreferenceClickListener(this);
@@ -70,7 +70,7 @@ public class UsbDetailsPowerRoleController extends UsbDetailsController
         // Hide this option if this is not a PD compatible connection
         if (connected && !mUsbBackend.areAllRolesSupported()) {
             mFragment.getPreferenceScreen().removePreference(mPreferenceCategory);
-        } else if (connected && mUsbBackend.areAllRolesSupported()){
+        } else if (connected && mUsbBackend.areAllRolesSupported()) {
             mFragment.getPreferenceScreen().addPreference(mPreferenceCategory);
         }
         if (powerRole == POWER_ROLE_SOURCE) {
@@ -79,7 +79,7 @@ public class UsbDetailsPowerRoleController extends UsbDetailsController
         } else if (powerRole == POWER_ROLE_SINK) {
             mSwitchPreference.setChecked(false);
             mPreferenceCategory.setEnabled(true);
-        } else if (!connected || powerRole == POWER_ROLE_NONE){
+        } else if (!connected || powerRole == POWER_ROLE_NONE) {
             mPreferenceCategory.setEnabled(false);
             if (mNextPowerRole == POWER_ROLE_NONE) {
                 mSwitchPreference.setSummary("");

src/com/android/settings/development/AbstractBluetoothA2dpPreferenceController.java

@@ -65,7 +65,7 @@ public abstract class AbstractBluetoothA2dpPreferenceController extends
     public void displayPreference(PreferenceScreen screen) {
         super.displayPreference(screen);
 
-        mPreference = (ListPreference) screen.findPreference(getPreferenceKey());
+        mPreference = screen.findPreference(getPreferenceKey());
 
         // Set a default value because BluetoothCodecConfig is null initially.
         mPreference.setValue(mListValues[getDefaultIndex()]);

src/com/android/settings/development/OemUnlockPreferenceController.java

@@ -77,7 +77,7 @@ public class OemUnlockPreferenceController extends DeveloperOptionsPreferenceCon
     public void displayPreference(PreferenceScreen screen) {
         super.displayPreference(screen);
 
-        mPreference = (RestrictedSwitchPreference) screen.findPreference(getPreferenceKey());
+        mPreference = screen.findPreference(getPreferenceKey());
     }
 
     @Override

src/com/android/settings/development/OverlayCategoryPreferenceController.java

@@ -41,7 +41,6 @@ import com.android.settingslib.development.DeveloperOptionsPreferenceController;
 import java.util.ArrayList;
 import java.util.Comparator;
 import java.util.List;
-import java.util.Optional;
 
 /**
  * Preference controller to allow users to choose an overlay from a list for a given category.
@@ -91,7 +90,7 @@ public class OverlayCategoryPreferenceController extends DeveloperOptionsPrefere
     @Override
     public void displayPreference(PreferenceScreen screen) {
         super.displayPreference(screen);
-        setPreference((ListPreference) screen.findPreference(getPreferenceKey()));
+        setPreference(screen.findPreference(getPreferenceKey()));
     }
 
     @VisibleForTesting
@@ -124,7 +123,8 @@ public class OverlayCategoryPreferenceController extends DeveloperOptionsPrefere
                     if (PACKAGE_DEVICE_DEFAULT.equals(packageName)) {
                         return mOverlayManager.setEnabled(currentPackageName, false, USER_SYSTEM);
                     } else {
-                        return mOverlayManager.setEnabledExclusiveInCategory(packageName, USER_SYSTEM);
+                        return mOverlayManager.setEnabledExclusiveInCategory(packageName,
+                                USER_SYSTEM);
                     }
                 } catch (RemoteException re) {
                     Log.w(TAG, "Error enabling overlay.", re);

src/com/android/settings/development/PictureColorModePreferenceController.java

@@ -56,7 +56,7 @@ public class PictureColorModePreferenceController extends DeveloperOptionsPrefer
     @Override
     public void displayPreference(PreferenceScreen screen) {
         super.displayPreference(screen);
-        mPreference = (ColorModePreference) screen.findPreference(getPreferenceKey());
+        mPreference = screen.findPreference(getPreferenceKey());
         if (mPreference != null) {
             mPreference.updateCurrentAndSupported();
         }

src/com/android/settings/development/StayAwakePreferenceController.java

@@ -72,7 +72,7 @@ public class StayAwakePreferenceController extends DeveloperOptionsPreferenceCon
     @Override
     public void displayPreference(PreferenceScreen screen) {
         super.displayPreference(screen);
-        mPreference = (RestrictedSwitchPreference) screen.findPreference(getPreferenceKey());
+        mPreference = screen.findPreference(getPreferenceKey());
     }
 
     @Override

src/com/android/settings/development/featureflags/FeatureFlagsPreferenceController.java

@@ -45,7 +45,7 @@ public class FeatureFlagsPreferenceController extends BasePreferenceController
     @Override
     public void displayPreference(PreferenceScreen screen) {
         super.displayPreference(screen);
-        mGroup = (PreferenceGroup) screen.findPreference(getPreferenceKey());
+        mGroup = screen.findPreference(getPreferenceKey());
     }
 
     @Override

src/com/android/settings/development/gamedriver/GameDriverAppPreferenceController.java

@@ -113,7 +113,7 @@ public class GameDriverAppPreferenceController extends BasePreferenceController
     @Override
     public void displayPreference(PreferenceScreen screen) {
         super.displayPreference(screen);
-        mPreferenceGroup = (PreferenceGroup) screen.findPreference(getPreferenceKey());
+        mPreferenceGroup = screen.findPreference(getPreferenceKey());
 
         final Context context = mPreferenceGroup.getContext();
         for (AppInfo appInfo : mAppInfos) {
@@ -179,6 +179,7 @@ public class GameDriverAppPreferenceController extends BasePreferenceController
             info = applicationInfo;
             label = packageManager.getApplicationLabel(applicationInfo).toString();
         }
+
         final ApplicationInfo info;
         final String label;
     }

src/com/android/settings/deviceinfo/storage/AutomaticStorageManagementSwitchPreferenceController.java

@@ -61,7 +61,7 @@ public class AutomaticStorageManagementSwitchPreferenceController extends
     @Override
     public void displayPreference(PreferenceScreen screen) {
         super.displayPreference(screen);
-        mSwitch = (MasterSwitchPreference) screen.findPreference(getPreferenceKey());
+        mSwitch = screen.findPreference(getPreferenceKey());
     }
 
     @Override

src/com/android/settings/deviceinfo/storage/SecondaryUserController.java

@@ -49,8 +49,10 @@ public class SecondaryUserController extends AbstractPreferenceController implem
     private static final int USER_PROFILE_INSERTION_LOCATION = 6;
     private static final int SIZE_NOT_SET = -1;
 
-    private @NonNull UserInfo mUser;
+    private @NonNull
-    private @Nullable StorageItemPreference mStoragePreference;
+    UserInfo mUser;
+    private @Nullable
+    StorageItemPreference mStoragePreference;
     private Drawable mUserIcon;
     private long mSize;
     private long mTotalSizeBytes;
@@ -58,6 +60,7 @@ public class SecondaryUserController extends AbstractPreferenceController implem
     /**
      * Adds the appropriate controllers to a controller list for handling all secondary users on
      * a device.
+     *
      * @param context     Context for initializing the preference controllers.
      * @param userManager UserManagerWrapper for figuring out which controllers to add.
      */
@@ -91,6 +94,7 @@ public class SecondaryUserController extends AbstractPreferenceController implem
 
     /**
      * Constructor for a given secondary user.
+     *
      * @param context Context to initialize the underlying {@link AbstractPreferenceController}.
      * @param info    {@link UserInfo} for the secondary user which this controllers covers.
      */
@@ -107,7 +111,7 @@ public class SecondaryUserController extends AbstractPreferenceController implem
             mStoragePreference = new StorageItemPreference(screen.getContext());
 
             PreferenceGroup group =
-                    (PreferenceGroup) screen.findPreference(TARGET_PREFERENCE_GROUP_KEY);
+                    screen.findPreference(TARGET_PREFERENCE_GROUP_KEY);
             mStoragePreference.setTitle(mUser.name);
             mStoragePreference.setKey(PREFERENCE_KEY_BASE + mUser.id);
             if (mSize != SIZE_NOT_SET) {
@@ -140,6 +144,7 @@ public class SecondaryUserController extends AbstractPreferenceController implem
 
     /**
      * Sets the size for the preference.
+     *
      * @param size Size in bytes.
      */
     public void setSize(long size) {
@@ -151,6 +156,7 @@ public class SecondaryUserController extends AbstractPreferenceController implem
 
     /**
      * Sets the total size for the preference for the progress bar.
+     *
      * @param totalSizeBytes Total size in bytes.
      */
     public void setTotalSize(long totalSizeBytes) {
@@ -185,8 +191,7 @@ public class SecondaryUserController extends AbstractPreferenceController implem
 
         @Override
         public void displayPreference(PreferenceScreen screen) {
-            PreferenceGroup group =
+            final PreferenceGroup group = screen.findPreference(TARGET_PREFERENCE_GROUP_KEY);
-                    (PreferenceGroup) screen.findPreference(TARGET_PREFERENCE_GROUP_KEY);
             if (group == null) {
                 return;
             }

src/com/android/settings/deviceinfo/storage/StorageItemPreferenceController.java

@@ -225,7 +225,7 @@ public class StorageItemPreferenceController extends AbstractPreferenceControlle
 
     private static Drawable applyTint(Context context, Drawable icon) {
         TypedArray array =
-                context.obtainStyledAttributes(new int[] {android.R.attr.colorControlNormal});
+                context.obtainStyledAttributes(new int[]{android.R.attr.colorControlNormal});
         icon = icon.mutate();
         icon.setTint(array.getColor(0, 0));
         array.recycle();
@@ -235,13 +235,13 @@ public class StorageItemPreferenceController extends AbstractPreferenceControlle
     @Override
     public void displayPreference(PreferenceScreen screen) {
         mScreen = screen;
-        mPhotoPreference = (StorageItemPreference) screen.findPreference(PHOTO_KEY);
+        mPhotoPreference = screen.findPreference(PHOTO_KEY);
-        mAudioPreference = (StorageItemPreference) screen.findPreference(AUDIO_KEY);
+        mAudioPreference = screen.findPreference(AUDIO_KEY);
-        mGamePreference = (StorageItemPreference) screen.findPreference(GAME_KEY);
+        mGamePreference = screen.findPreference(GAME_KEY);
-        mMoviesPreference = (StorageItemPreference) screen.findPreference(MOVIES_KEY);
+        mMoviesPreference = screen.findPreference(MOVIES_KEY);
-        mAppPreference = (StorageItemPreference) screen.findPreference(OTHER_APPS_KEY);
+        mAppPreference = screen.findPreference(OTHER_APPS_KEY);
-        mSystemPreference = (StorageItemPreference) screen.findPreference(SYSTEM_KEY);
+        mSystemPreference = screen.findPreference(SYSTEM_KEY);
-        mFilePreference = (StorageItemPreference) screen.findPreference(FILES_KEY);
+        mFilePreference = screen.findPreference(FILES_KEY);
 
         setFilesPreferenceVisibility();
     }

src/com/android/settings/deviceinfo/storage/StorageSummaryDonutPreferenceController.java

@@ -46,7 +46,6 @@ public class StorageSummaryDonutPreferenceController extends AbstractPreferenceC
     /**
      * Converts a used storage amount to a formatted text.
      *
-     * @param context Context
      * @param usedBytes used bytes of storage
      * @return a formatted text.
      */
@@ -59,7 +58,7 @@ public class StorageSummaryDonutPreferenceController extends AbstractPreferenceC
 
     @Override
     public void displayPreference(PreferenceScreen screen) {
-        mSummary = (StorageSummaryDonutPreference) screen.findPreference("pref_summary");
+        mSummary = screen.findPreference("pref_summary");
         mSummary.setEnabled(true);
     }
 

src/com/android/settings/display/NightModePreferenceController.java

@@ -52,8 +52,7 @@ public class NightModePreferenceController extends AbstractPreferenceController
             setVisible(screen, KEY_NIGHT_MODE, false /* visible */);
             return;
         }
-        ListPreference mNightModePreference = (ListPreference) screen.findPreference(
+        final ListPreference mNightModePreference = screen.findPreference(KEY_NIGHT_MODE);
-                KEY_NIGHT_MODE);
         if (mNightModePreference != null) {
             final UiModeManager uiManager =
                     (UiModeManager) mContext.getSystemService(UI_MODE_SERVICE);

src/com/android/settings/dream/StartNowPreferenceController.java

@@ -54,8 +54,8 @@ public class StartNowPreferenceController extends AbstractPreferenceController i
     public void displayPreference(PreferenceScreen screen) {
         super.displayPreference(screen);
 
-        LayoutPreference pref = (LayoutPreference) screen.findPreference(getPreferenceKey());
+        LayoutPreference pref = screen.findPreference(getPreferenceKey());
-        Button startButton = (Button)pref.findViewById(R.id.dream_start_now_button);
+        Button startButton = pref.findViewById(R.id.dream_start_now_button);
         startButton.setOnClickListener(v -> mBackend.startDreaming());
     }
 
@@ -63,7 +63,7 @@ public class StartNowPreferenceController extends AbstractPreferenceController i
     public void updateState(Preference preference) {
         super.updateState(preference);
 
-        Button startButton = (Button)((LayoutPreference)preference)
+        Button startButton = ((LayoutPreference) preference)
                 .findViewById(R.id.dream_start_now_button);
         startButton.setEnabled(mBackend.getWhenToDreamSetting() != DreamBackend.NEVER);
     }

src/com/android/settings/fuelgauge/BatteryAppListPreferenceController.java

@@ -143,7 +143,7 @@ public class BatteryAppListPreferenceController extends AbstractPreferenceContro
     public void displayPreference(PreferenceScreen screen) {
         super.displayPreference(screen);
         mPrefContext = screen.getContext();
-        mAppListGroup = (PreferenceGroup) screen.findPreference(mPreferenceKey);
+        mAppListGroup = screen.findPreference(mPreferenceKey);
     }
 
     @Override

src/com/android/settings/fuelgauge/batterysaver/BatterySaverButtonPreferenceController.java

@@ -72,7 +72,7 @@ public class BatterySaverButtonPreferenceController extends
     @Override
     public void displayPreference(PreferenceScreen screen) {
         super.displayPreference(screen);
-        mPreference = (TwoStateButtonPreference) screen.findPreference(getPreferenceKey());
+        mPreference = screen.findPreference(getPreferenceKey());
     }
 
     @Override

src/com/android/settings/gestures/GesturePreferenceController.java

@@ -51,7 +51,7 @@ public abstract class GesturePreferenceController extends TogglePreferenceContro
     public void displayPreference(PreferenceScreen screen) {
         super.displayPreference(screen);
         if (isAvailable()) {
-            mVideoPreference = (VideoPreference) screen.findPreference(getVideoPrefKey());
+            mVideoPreference = screen.findPreference(getVideoPrefKey());
         }
     }
 

src/com/android/settings/gestures/PreventRingingGesturePreferenceController.java

@@ -45,9 +45,11 @@ public class PreventRingingGesturePreferenceController extends AbstractPreferenc
         implements RadioButtonPreference.OnClickListener, LifecycleObserver, OnSaveInstanceState,
         OnResume, OnPause, OnCreate, PreferenceControllerMixin {
 
-    @VisibleForTesting static final String KEY_VIBRATE = "prevent_ringing_option_vibrate";
+    @VisibleForTesting
+    static final String KEY_VIBRATE = "prevent_ringing_option_vibrate";
 
-    @VisibleForTesting static final String KEY_MUTE = "prevent_ringing_option_mute";
+    @VisibleForTesting
+    static final String KEY_MUTE = "prevent_ringing_option_mute";
 
     private final String KEY_VIDEO_PAUSED = "key_video_paused";
     private final String PREF_KEY_VIDEO = "gesture_prevent_ringing_video";
@@ -57,9 +59,12 @@ public class PreventRingingGesturePreferenceController extends AbstractPreferenc
     private VideoPreference mVideoPreference;
     private boolean mVideoPaused;
 
-    @VisibleForTesting PreferenceCategory mPreferenceCategory;
+    @VisibleForTesting
-    @VisibleForTesting RadioButtonPreference mVibratePref;
+    PreferenceCategory mPreferenceCategory;
-    @VisibleForTesting RadioButtonPreference mMutePref;
+    @VisibleForTesting
+    RadioButtonPreference mVibratePref;
+    @VisibleForTesting
+    RadioButtonPreference mMutePref;
 
     private SettingObserver mSettingObserver;
 
@@ -75,8 +80,10 @@ public class PreventRingingGesturePreferenceController extends AbstractPreferenc
     @Override
     public void displayPreference(PreferenceScreen screen) {
         super.displayPreference(screen);
-        if (isAvailable()) {
+        if (!isAvailable()) {
-            mPreferenceCategory = (PreferenceCategory) screen.findPreference(getPreferenceKey());
+            return;
+        }
+        mPreferenceCategory = screen.findPreference(getPreferenceKey());
         mVibratePref = makeRadioPreference(KEY_VIBRATE, R.string.prevent_ringing_option_vibrate);
         mMutePref = makeRadioPreference(KEY_MUTE, R.string.prevent_ringing_option_mute);
 
@@ -84,8 +91,7 @@ public class PreventRingingGesturePreferenceController extends AbstractPreferenc
             mSettingObserver = new SettingObserver(mPreferenceCategory);
         }
 
-            mVideoPreference = (VideoPreference) screen.findPreference(getVideoPrefKey());
+        mVideoPreference = screen.findPreference(getVideoPrefKey());
-        }
     }
 
     @Override

src/com/android/settings/gestures/PreventRingingSwitchPreferenceController.java

@@ -41,7 +41,8 @@ public class PreventRingingSwitchPreferenceController extends AbstractPreference
     private final Context mContext;
     private SettingObserver mSettingObserver;
 
-    @VisibleForTesting SwitchBar mSwitch;
+    @VisibleForTesting
+    SwitchBar mSwitch;
 
     public PreventRingingSwitchPreferenceController(Context context) {
         super(context);
@@ -57,7 +58,7 @@ public class PreventRingingSwitchPreferenceController extends AbstractPreference
     public void displayPreference(PreferenceScreen screen) {
         super.displayPreference(screen);
         if (isAvailable()) {
-            LayoutPreference pref = (LayoutPreference) screen.findPreference(getPreferenceKey());
+            LayoutPreference pref = screen.findPreference(getPreferenceKey());
             if (pref != null) {
                 mSettingObserver = new SettingObserver(pref);
                 mSwitch = pref.findViewById(R.id.switch_bar);

src/com/android/settings/location/LocationForWorkPreferenceController.java

@@ -57,8 +57,7 @@ public class LocationForWorkPreferenceController extends LocationBasePreferenceC
     @Override
     public void displayPreference(PreferenceScreen screen) {
         super.displayPreference(screen);
-        mPreference =
+        mPreference = screen.findPreference(KEY_MANAGED_PROFILE_SWITCH);
-                (RestrictedSwitchPreference) screen.findPreference(KEY_MANAGED_PROFILE_SWITCH);
     }
 
     @Override

src/com/android/settings/location/LocationServicePreferenceController.java

@@ -84,8 +84,7 @@ public class LocationServicePreferenceController extends LocationBasePreferenceC
     @Override
     public void displayPreference(PreferenceScreen screen) {
         super.displayPreference(screen);
-        mCategoryLocationServices =
+        mCategoryLocationServices = screen.findPreference(KEY_LOCATION_SERVICES);
-                (PreferenceCategory) screen.findPreference(KEY_LOCATION_SERVICES);
     }
 
     @Override

src/com/android/settings/location/RecentLocationAccessPreferenceController.java

@@ -69,8 +69,7 @@ public class RecentLocationAccessPreferenceController extends AbstractPreference
     @Override
     public void displayPreference(PreferenceScreen screen) {
         super.displayPreference(screen);
-        final LayoutPreference preference = (LayoutPreference) screen.findPreference(
+        final LayoutPreference preference = screen.findPreference(KEY_APPS_DASHBOARD);
-                KEY_APPS_DASHBOARD);
         final View view = preference.findViewById(R.id.app_entities_header);
         mController = AppEntitiesHeaderController.newInstance(mContext, view)
                 .setHeaderTitleRes(R.string.location_category_recent_location_access)

src/com/android/settings/network/AirplaneModePreferenceController.java

@@ -81,7 +81,7 @@ public class AirplaneModePreferenceController extends TogglePreferenceController
     public void displayPreference(PreferenceScreen screen) {
         super.displayPreference(screen);
         if (isAvailable()) {
-            mAirplaneModePreference = (SwitchPreference) screen.findPreference(getPreferenceKey());
+            mAirplaneModePreference = screen.findPreference(getPreferenceKey());
         }
     }
 

src/com/android/settings/network/MultiNetworkHeaderController.java

@@ -65,7 +65,7 @@ public class MultiNetworkHeaderController extends BasePreferenceController imple
     @Override
     public void displayPreference(PreferenceScreen screen) {
         super.displayPreference(screen);
-        mPreferenceCategory = (PreferenceCategory) screen.findPreference(mPreferenceKey);
+        mPreferenceCategory = screen.findPreference(mPreferenceKey);
         mPreferenceCategory.setVisible(isAvailable());
         mWifiController.displayPreference(screen);
         mSubscriptionsController.displayPreference(screen);

src/com/android/settings/network/SubscriptionsPreferenceController.java

@@ -107,7 +107,7 @@ public class SubscriptionsPreferenceController extends AbstractPreferenceControl
 
     @Override
     public void displayPreference(PreferenceScreen screen) {
-        mPreferenceGroup = (PreferenceGroup) screen.findPreference(mPreferenceGroupKey);
+        mPreferenceGroup = screen.findPreference(mPreferenceGroupKey);
         update();
     }
 
@@ -209,7 +209,6 @@ public class SubscriptionsPreferenceController extends AbstractPreferenceControl
     }
 
     /**
-     *
      * @return true if there are at least 2 available subscriptions.
      */
     @Override

src/com/android/settings/nfc/AndroidBeamPreferenceController.java

@@ -47,8 +47,7 @@ public class AndroidBeamPreferenceController extends BasePreferenceController
             return;
         }
 
-        final RestrictedPreference restrictedPreference =
+        final RestrictedPreference restrictedPreference = screen.findPreference(getPreferenceKey());
-                (RestrictedPreference) screen.findPreference(getPreferenceKey());
         mAndroidBeamEnabler = new AndroidBeamEnabler(mContext, restrictedPreference);
     }
 

src/com/android/settings/nfc/NfcForegroundPreferenceController.java

@@ -81,16 +81,16 @@ public class NfcForegroundPreferenceController extends BasePreferenceController
     @Override
     public void displayPreference(PreferenceScreen screen) {
         super.displayPreference(screen);
-        mPreference = (DropDownPreference) screen.findPreference(getPreferenceKey());
+        mPreference = screen.findPreference(getPreferenceKey());
         if (mPreference == null) {
             return;
         }
 
-        mPreference.setEntries(new CharSequence[] {
+        mPreference.setEntries(new CharSequence[]{
                 mContext.getText(R.string.nfc_payment_favor_open),
                 mContext.getText(R.string.nfc_payment_favor_default)
         });
-        mPreference.setEntryValues(new CharSequence[] {"1", "0"});
+        mPreference.setEntryValues(new CharSequence[]{"1", "0"});
     }
 
     @Override

src/com/android/settings/nfc/NfcPaymentPreferenceController.java

@@ -98,7 +98,7 @@ public class NfcPaymentPreferenceController extends BasePreferenceController imp
     @Override
     public void displayPreference(PreferenceScreen screen) {
         super.displayPreference(screen);
-        mPreference = (NfcPaymentPreference) screen.findPreference(getPreferenceKey());
+        mPreference = screen.findPreference(getPreferenceKey());
         if (mPreference != null) {
             mPreference.initialize(this);
         }

src/com/android/settings/nfc/SecureNfcPreferenceController.java

@@ -17,7 +17,6 @@ package com.android.settings.nfc;
 
 import android.content.Context;
 import android.nfc.NfcAdapter;
-import android.os.SystemProperties;
 
 import androidx.preference.PreferenceScreen;
 import androidx.preference.SwitchPreference;
@@ -30,7 +29,6 @@ import com.android.settingslib.core.lifecycle.events.OnResume;
 public class SecureNfcPreferenceController extends TogglePreferenceController
         implements LifecycleObserver, OnResume, OnPause {
 
-    public static final String KEY_TOGGLE_NFC = "nfc_secure_setting";
     private final NfcAdapter mNfcAdapter;
     private SecureNfcEnabler mSecureNfcEnabler;
 
@@ -47,8 +45,7 @@ public class SecureNfcPreferenceController extends TogglePreferenceController
             return;
         }
 
-        final SwitchPreference switchPreference =
+        final SwitchPreference switchPreference = screen.findPreference(getPreferenceKey());
-                (SwitchPreference) screen.findPreference(getPreferenceKey());
 
         mSecureNfcEnabler = new SecureNfcEnabler(mContext, switchPreference);
     }
@@ -69,7 +66,8 @@ public class SecureNfcPreferenceController extends TogglePreferenceController
         if (mNfcAdapter == null) {
             return UNSUPPORTED_ON_DEVICE;
         }
-        return mNfcAdapter.deviceSupportsNfcSecure() ? AVAILABLE
+        return mNfcAdapter.deviceSupportsNfcSecure()
+                ? AVAILABLE
                 : UNSUPPORTED_ON_DEVICE;
     }
 

src/com/android/settings/notification/BootSoundPreferenceController.java

@@ -43,7 +43,7 @@ public class BootSoundPreferenceController extends AbstractPreferenceController
     public void displayPreference(PreferenceScreen screen) {
         super.displayPreference(screen);
         if (isAvailable()) {
-            SwitchPreference preference = (SwitchPreference) screen.findPreference(KEY_BOOT_SOUNDS);
+            SwitchPreference preference = screen.findPreference(KEY_BOOT_SOUNDS);
             preference.setChecked(SystemProperties.getBoolean(PROPERTY_BOOT_SOUNDS, true));
         }
     }

src/com/android/settings/notification/LockScreenNotificationPreferenceController.java

@@ -92,13 +92,13 @@ public class LockScreenNotificationPreferenceController extends AbstractPreferen
     @Override
     public void displayPreference(PreferenceScreen screen) {
         super.displayPreference(screen);
-        mLockscreen = (RestrictedListPreference) screen.findPreference(mSettingKey);
+        mLockscreen = screen.findPreference(mSettingKey);
         if (mLockscreen == null) {
             Log.i(TAG, "Preference not found: " + mSettingKey);
             return;
         }
         if (mProfileUserId != UserHandle.USER_NULL) {
-            mLockscreenProfile = (RestrictedListPreference) screen.findPreference(mWorkSettingKey);
+            mLockscreenProfile = screen.findPreference(mWorkSettingKey);
             mLockscreenProfile.setRequiresActiveUnlockedProfile(true);
             mLockscreenProfile.setProfileUserId(mProfileUserId);
         } else {

src/com/android/settings/notification/RecentNotifyingAppsPreferenceController.java

@@ -118,7 +118,7 @@ public class RecentNotifyingAppsPreferenceController extends AbstractPreferenceC
 
     @Override
     public void displayPreference(PreferenceScreen screen) {
-        mCategory = (PreferenceCategory) screen.findPreference(getPreferenceKey());
+        mCategory = screen.findPreference(getPreferenceKey());
         mSeeAllPref = screen.findPreference(KEY_SEE_ALL);
         mDivider = screen.findPreference(KEY_DIVIDER);
         super.displayPreference(screen);

src/com/android/settings/notification/SoundPreferenceController.java

@@ -67,7 +67,7 @@ public class SoundPreferenceController extends NotificationPreferenceController
     public void displayPreference(PreferenceScreen screen) {
         super.displayPreference(screen);
 
-        mPreference = (NotificationSoundPreference) screen.findPreference(getPreferenceKey());
+        mPreference = screen.findPreference(getPreferenceKey());
     }
 
     public void updateState(Preference preference) {

src/com/android/settings/notification/VolumeSeekBarPreferenceController.java

@@ -54,7 +54,7 @@ public abstract class VolumeSeekBarPreferenceController extends
     public void displayPreference(PreferenceScreen screen) {
         super.displayPreference(screen);
         if (isAvailable()) {
-            mPreference = (VolumeSeekBarPreference) screen.findPreference(getPreferenceKey());
+            mPreference = screen.findPreference(getPreferenceKey());
             mPreference.setCallback(mVolumePreferenceCallback);
             mPreference.setStream(getAudioStream());
             mPreference.setMuteIcon(getMuteIcon());

src/com/android/settings/notification/WorkSoundPreferenceController.java

@@ -100,7 +100,7 @@ public class WorkSoundPreferenceController extends AbstractPreferenceController
     @Override
     public void displayPreference(PreferenceScreen screen) {
         super.displayPreference(screen);
-        mWorkPreferenceCategory = (PreferenceGroup) screen.findPreference(KEY_WORK_CATEGORY);
+        mWorkPreferenceCategory = screen.findPreference(KEY_WORK_CATEGORY);
     }
 
     @Override

src/com/android/settings/notification/ZenAutomaticRuleSwitchPreferenceController.java

@@ -56,7 +56,7 @@ public class ZenAutomaticRuleSwitchPreferenceController extends
     @Override
     public void displayPreference(PreferenceScreen screen) {
         super.displayPreference(screen);
-        LayoutPreference pref = (LayoutPreference) screen.findPreference(KEY);
+        LayoutPreference pref = screen.findPreference(KEY);
         mSwitchBar = pref.findViewById(R.id.switch_bar);
 
         if (mSwitchBar != null) {

src/com/android/settings/notification/ZenModeAutomaticRulesPreferenceController.java

@@ -56,7 +56,7 @@ public class ZenModeAutomaticRulesPreferenceController extends
     @Override
     public void displayPreference(PreferenceScreen screen) {
         super.displayPreference(screen);
-        mPreferenceCategory = (PreferenceCategory) screen.findPreference(getPreferenceKey());
+        mPreferenceCategory = screen.findPreference(getPreferenceKey());
         mPreferenceCategory.setPersistent(false);
     }
 

src/com/android/settings/notification/ZenModePriorityCallsPreferenceController.java

@@ -56,7 +56,7 @@ public class ZenModePriorityCallsPreferenceController extends AbstractZenModePre
     @Override
     public void displayPreference(PreferenceScreen screen) {
         super.displayPreference(screen);
-        mPreference = (ListPreference) screen.findPreference(KEY);
+        mPreference = screen.findPreference(KEY);
     }
 
     @Override

src/com/android/settings/notification/ZenModePriorityMessagesPreferenceController.java

@@ -56,7 +56,7 @@ public class ZenModePriorityMessagesPreferenceController extends AbstractZenMode
     @Override
     public void displayPreference(PreferenceScreen screen) {
         super.displayPreference(screen);
-        mPreference = (ListPreference) screen.findPreference(KEY);
+        mPreference = screen.findPreference(KEY);
     }
 
     @Override

src/com/android/settings/notification/ZenModeVisEffectsAllPreferenceController.java

@@ -49,7 +49,7 @@ public class ZenModeVisEffectsAllPreferenceController
     @Override
     public void displayPreference(PreferenceScreen screen) {
         super.displayPreference(screen);
-        mPreference = (ZenCustomRadioButtonPreference) screen.findPreference(getPreferenceKey());
+        mPreference = screen.findPreference(getPreferenceKey());
         mPreference.setOnRadioButtonClickListener(this);
     }
 

src/com/android/settings/notification/ZenModeVisEffectsCustomPreferenceController.java

@@ -51,7 +51,7 @@ public class ZenModeVisEffectsCustomPreferenceController
     @Override
     public void displayPreference(PreferenceScreen screen) {
         super.displayPreference(screen);
-        mPreference = (ZenCustomRadioButtonPreference) screen.findPreference(getPreferenceKey());
+        mPreference = screen.findPreference(getPreferenceKey());
 
         mPreference.setOnGearClickListener(p -> {
             launchCustomSettings();

src/com/android/settings/notification/ZenModeVisEffectsNonePreferenceController.java

@@ -49,7 +49,7 @@ public class ZenModeVisEffectsNonePreferenceController
     @Override
     public void displayPreference(PreferenceScreen screen) {
         super.displayPreference(screen);
-        mPreference = (ZenCustomRadioButtonPreference) screen.findPreference(getPreferenceKey());
+        mPreference = screen.findPreference(getPreferenceKey());
         mPreference.setOnRadioButtonClickListener(this);
     }
 

src/com/android/settings/notification/ZenRuleCustomPolicyPreferenceController.java

@@ -39,7 +39,7 @@ public class ZenRuleCustomPolicyPreferenceController extends
     @Override
     public void displayPreference(PreferenceScreen screen) {
         super.displayPreference(screen);
-        mPreference = (ZenCustomRadioButtonPreference) screen.findPreference(getPreferenceKey());
+        mPreference = screen.findPreference(getPreferenceKey());
 
         mPreference.setOnGearClickListener(p -> {
             setCustomPolicy();

src/com/android/settings/notification/ZenRuleDefaultPolicyPreferenceController.java

@@ -40,7 +40,7 @@ public class ZenRuleDefaultPolicyPreferenceController extends
     @Override
     public void displayPreference(PreferenceScreen screen) {
         super.displayPreference(screen);
-        mPreference = (ZenCustomRadioButtonPreference) screen.findPreference(getPreferenceKey());
+        mPreference = screen.findPreference(getPreferenceKey());
 
         mPreference.setOnRadioButtonClickListener(p -> {
             mRule.setZenPolicy(null);

src/com/android/settings/notification/ZenRuleVisEffectsAllPreferenceController.java

@@ -41,7 +41,7 @@ public class ZenRuleVisEffectsAllPreferenceController extends
     @Override
     public void displayPreference(PreferenceScreen screen) {
         super.displayPreference(screen);
-        mPreference = (ZenCustomRadioButtonPreference) screen.findPreference(getPreferenceKey());
+        mPreference = screen.findPreference(getPreferenceKey());
 
         mPreference.setOnRadioButtonClickListener(p -> {
             mMetricsFeatureProvider.action(mContext, SettingsEnums.ACTION_ZEN_SOUND_ONLY,

src/com/android/settings/notification/ZenRuleVisEffectsCustomPreferenceController.java

@@ -41,7 +41,7 @@ public class ZenRuleVisEffectsCustomPreferenceController extends
     @Override
     public void displayPreference(PreferenceScreen screen) {
         super.displayPreference(screen);
-        mPreference = (ZenCustomRadioButtonPreference) screen.findPreference(getPreferenceKey());
+        mPreference = screen.findPreference(getPreferenceKey());
 
         mPreference.setOnGearClickListener(p -> {
             launchCustomSettings();

src/com/android/settings/privacy/PermissionBarChartPreferenceController.java

@@ -73,7 +73,7 @@ public class PermissionBarChartPreferenceController extends BasePreferenceContro
     @Override
     public void displayPreference(PreferenceScreen screen) {
         super.displayPreference(screen);
-        mBarChartPreference = (BarChartPreference) screen.findPreference(getPreferenceKey());
+        mBarChartPreference = screen.findPreference(getPreferenceKey());
 
         final BarChartInfo info = new BarChartInfo.Builder()
                 .setTitle(R.string.permission_bar_chart_title)

src/com/android/settings/security/ChangeScreenLockPreferenceController.java

@@ -79,7 +79,7 @@ public class ChangeScreenLockPreferenceController extends AbstractPreferenceCont
     @Override
     public void displayPreference(PreferenceScreen screen) {
         super.displayPreference(screen);
-        mPreference = (RestrictedPreference) screen.findPreference(getPreferenceKey());
+        mPreference = screen.findPreference(getPreferenceKey());
     }
 
     @Override

src/com/android/settings/security/LockUnificationPreferenceController.java

@@ -77,7 +77,7 @@ public class LockUnificationPreferenceController extends AbstractPreferenceContr
     @Override
     public void displayPreference(PreferenceScreen screen) {
         super.displayPreference(screen);
-        mUnifyProfile = (RestrictedSwitchPreference) screen.findPreference(KEY_UNIFICATION);
+        mUnifyProfile = screen.findPreference(KEY_UNIFICATION);
     }
 
     public LockUnificationPreferenceController(Context context, SecuritySettings host) {

src/com/android/settings/security/OwnerInfoPreferenceController.java

@@ -61,7 +61,7 @@ public class OwnerInfoPreferenceController extends AbstractPreferenceController
 
     @Override
     public void displayPreference(PreferenceScreen screen) {
-        mOwnerInfoPref  = (RestrictedPreference) screen.findPreference(KEY_OWNER_INFO);
+        mOwnerInfoPref  = screen.findPreference(KEY_OWNER_INFO);
     }
 
     @Override

src/com/android/settings/security/ResetCredentialsPreferenceController.java

@@ -52,7 +52,7 @@ public class ResetCredentialsPreferenceController extends RestrictedEncryptionPr
     @Override
     public void displayPreference(PreferenceScreen screen) {
         super.displayPreference(screen);
-        mPreference = (RestrictedPreference) screen.findPreference(getPreferenceKey());
+        mPreference = screen.findPreference(getPreferenceKey());
     }
 
     @Override

src/com/android/settings/security/trustagent/TrustAgentListPreferenceController.java

@@ -91,7 +91,7 @@ public class TrustAgentListPreferenceController extends AbstractPreferenceContro
     @Override
     public void displayPreference(PreferenceScreen screen) {
         super.displayPreference(screen);
-        mSecurityCategory = (PreferenceCategory) screen.findPreference(PREF_KEY_SECURITY_CATEGORY);
+        mSecurityCategory = screen.findPreference(PREF_KEY_SECURITY_CATEGORY);
         updateTrustAgents();
     }
 

src/com/android/settings/widget/VideoPreferenceController.java

@@ -43,7 +43,7 @@ public class VideoPreferenceController extends BasePreferenceController implemen
     @Override
     public void displayPreference(PreferenceScreen screen) {
         super.displayPreference(screen);
-        mVideoPreference = (VideoPreference) screen.findPreference(getPreferenceKey());
+        mVideoPreference = screen.findPreference(getPreferenceKey());
     }
 
     @Override

src/com/android/settings/wifi/WifiConnectionPreferenceController.java

@@ -99,7 +99,7 @@ public class WifiConnectionPreferenceController extends AbstractPreferenceContro
     @Override
     public void displayPreference(PreferenceScreen screen) {
         super.displayPreference(screen);
-        mPreferenceGroup = (PreferenceGroup) screen.findPreference(mPreferenceGroupKey);
+        mPreferenceGroup = screen.findPreference(mPreferenceGroupKey);
         mPrefContext = screen.getContext();
         update();
     }

src/com/android/settings/wifi/WifiMasterSwitchPreferenceController.java

@@ -53,7 +53,7 @@ public class WifiMasterSwitchPreferenceController extends AbstractPreferenceCont
     @Override
     public void displayPreference(PreferenceScreen screen) {
         super.displayPreference(screen);
-        mWifiPreference = (MasterSwitchPreference) screen.findPreference(KEY_TOGGLE_WIFI);
+        mWifiPreference = screen.findPreference(KEY_TOGGLE_WIFI);
     }
 
     @Override

src/com/android/settings/wifi/WifiWakeupPreferenceController.java

@@ -62,7 +62,7 @@ public class WifiWakeupPreferenceController extends AbstractPreferenceController
     @Override
     public void displayPreference(PreferenceScreen screen) {
         super.displayPreference(screen);
-        mPreference = (SwitchPreference) screen.findPreference(KEY_ENABLE_WIFI_WAKEUP);
+        mPreference = screen.findPreference(KEY_ENABLE_WIFI_WAKEUP);
         updateState(mPreference);
     }
 

src/com/android/settings/wifi/details/WifiDetailPreferenceController.java

@@ -305,14 +305,14 @@ public class WifiDetailPreferenceController extends AbstractPreferenceController
         mSubnetPref = screen.findPreference(KEY_SUBNET_MASK_PREF);
         mDnsPref = screen.findPreference(KEY_DNS_PREF);
 
-        mIpv6Category = (PreferenceCategory) screen.findPreference(KEY_IPV6_CATEGORY);
+        mIpv6Category = screen.findPreference(KEY_IPV6_CATEGORY);
         mIpv6AddressPref = screen.findPreference(KEY_IPV6_ADDRESSES_PREF);
 
         mSecurityPref.setSummary(mAccessPoint.getSecurityString(/* concise */ false));
     }
 
     private void setupEntityHeader(PreferenceScreen screen) {
-        LayoutPreference headerPref = (LayoutPreference) screen.findPreference(KEY_HEADER);
+        LayoutPreference headerPref = screen.findPreference(KEY_HEADER);
         mEntityHeaderController =
                 EntityHeaderController.newInstance(
                         mFragment.getActivity(), mFragment,
@@ -502,7 +502,7 @@ public class WifiDetailPreferenceController extends AbstractPreferenceController
     private static String ipv4PrefixLengthToSubnetMask(int prefixLength) {
         try {
             InetAddress all = InetAddress.getByAddress(
-                    new byte[] {(byte) 255, (byte) 255, (byte) 255, (byte) 255});
+                    new byte[]{(byte) 255, (byte) 255, (byte) 255, (byte) 255});
             return NetworkUtils.getNetworkPart(all, prefixLength).getHostAddress();
         } catch (UnknownHostException e) {
             return null;

src/com/android/settings/wifi/p2p/P2pCategoryPreferenceController.java

@@ -42,7 +42,7 @@ public abstract class P2pCategoryPreferenceController extends AbstractPreference
     @Override
     public void displayPreference(PreferenceScreen screen) {
         super.displayPreference(screen);
-        mCategory = (PreferenceGroup) screen.findPreference(getPreferenceKey());
+        mCategory = screen.findPreference(getPreferenceKey());
     }
 
     public void removeAllChildren() {

src/com/android/settings/wifi/savedaccesspoints/SavedAccessPointsPreferenceController.java

@@ -76,7 +76,7 @@ public class SavedAccessPointsPreferenceController extends BasePreferenceControl
     @Override
     public void displayPreference(PreferenceScreen screen) {
         super.displayPreference(screen);
-        mPreferenceGroup = (PreferenceGroup) screen.findPreference(getPreferenceKey());
+        mPreferenceGroup = screen.findPreference(getPreferenceKey());
     }
 
     @Override