[Catalyst] Refactor some Text Reading items

Test: atest TextReadingPreferenceFragment
Bug: 372776688
Flag: com.android.settings.flags.catalyst_text_reading_screen
Change-Id: I49aa91ca6f441814d6aaeb86826291a155a306f1

src/com/android/settings/accessibility/TextReadingPreferenceFragment.java

@@ -66,7 +66,6 @@ public class TextReadingPreferenceFragment extends DashboardFragment {
     static final String RESET_KEY = "reset";
     static final String PREVIEW_KEY = "preview";
     private static final String NEED_RESET_SETTINGS = "need_reset_settings";
-    private static final String LAST_PREVIEW_INDEX = "last_preview_index";
     private static final int UNKNOWN_INDEX = -1;
 
     private FontWeightAdjustmentPreferenceController mFontWeightAdjustmentController;
@@ -111,13 +110,6 @@ public class TextReadingPreferenceFragment extends DashboardFragment {
             if (savedInstanceState.getBoolean(NEED_RESET_SETTINGS)) {
                 mResetStateListeners.forEach(ResetStateListener::resetState);
             }
-
-            if (savedInstanceState.containsKey(LAST_PREVIEW_INDEX)) {
-                final int lastPreviewIndex = savedInstanceState.getInt(LAST_PREVIEW_INDEX);
-                if (lastPreviewIndex != UNKNOWN_INDEX) {
-                    mPreviewController.setCurrentItem(lastPreviewIndex);
-                }
-            }
         }
     }
 
@@ -252,8 +244,6 @@ public class TextReadingPreferenceFragment extends DashboardFragment {
         if (mNeedResetSettings) {
             outState.putBoolean(NEED_RESET_SETTINGS, true);
         }
-
-        outState.putInt(LAST_PREVIEW_INDEX, mPreviewController.getCurrentItem());
     }
 
     @Override

src/com/android/settings/accessibility/TextReadingPreviewPreference.java

@@ -17,6 +17,8 @@
 package com.android.settings.accessibility;
 
 import android.content.Context;
+import android.os.Bundle;
+import android.os.Parcelable;
 import android.util.AttributeSet;
 import android.view.View;
 import android.widget.FrameLayout;
@@ -36,6 +38,7 @@ import com.android.settings.widget.DotsPageIndicator;
  * A {@link Preference} that could show the preview related to the text and reading options.
  */
 public class TextReadingPreviewPreference extends Preference {
+    private static final String KEY_LAST_INDEX = "last_preview_index";
     private int mCurrentItem;
     private int mLastLayerIndex;
     private PreviewPagerAdapter mPreviewAdapter;
@@ -98,6 +101,22 @@ public class TextReadingPreviewPreference extends Preference {
         updatePagerAndIndicator(viewPager, pageIndicator);
     }
 
+    @Override
+    protected Parcelable onSaveInstanceState() {
+        Bundle state = new Bundle();
+        state.putParcelable(null, super.onSaveInstanceState());
+        state.putInt(KEY_LAST_INDEX, getCurrentItem());
+        return state;
+    }
+
+    @Override
+    protected void onRestoreInstanceState(Parcelable state) {
+        Bundle bundle = (Bundle) state;
+        super.onRestoreInstanceState(bundle.getParcelable(null));
+        setCurrentItem(bundle.getInt(KEY_LAST_INDEX));
+    }
+
+
     /**
      * Set the minimum preview layout horizontal inner padding.
      */

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

@@ -56,10 +56,10 @@ public class LabeledSeekBarPreference extends SeekBarPreference {
     private final int mTextStartId;
     private final int mTextEndId;
     private final int mTickMarkId;
-    private final int mIconStartId;
-    private final int mIconEndId;
-    private final int mIconStartContentDescriptionId;
-    private final int mIconEndContentDescriptionId;
+    private int mIconStartId;
+    private int mIconEndId;
+    private int mIconStartContentDescriptionId;
+    private int mIconEndContentDescriptionId;
     private OnPreferenceChangeListener mStopListener;
     private SeekBar.OnSeekBarChangeListener mSeekBarChangeListener;
 
@@ -110,6 +110,38 @@ public class LabeledSeekBarPreference extends SeekBarPreference {
         return mSeekBar;
     }
 
+    /** Set the start icon of the Seekbar. */
+    public void setIconStart(int iconStartId) {
+        if (mIconStartId != iconStartId) {
+            mIconStartId = iconStartId;
+            notifyChanged();
+        }
+    }
+
+    /** Set the description resource id of the start icon. */
+    public void setIconStartContentDescription(int iconStartContentDescriptionId) {
+        if (mIconStartContentDescriptionId != iconStartContentDescriptionId) {
+            mIconStartContentDescriptionId = iconStartContentDescriptionId;
+            notifyChanged();
+        }
+    }
+
+    /** Set the end icon of the Seekbar. */
+    public void setIconEnd(int iconEndId) {
+        if (mIconEndId != iconEndId) {
+            mIconEndId = iconEndId;
+            notifyChanged();
+        }
+    }
+
+    /** Set the description resource id of the end icon. */
+    public void setIconEndContentDescription(int iconEndContentDescriptionId) {
+        if (mIconEndContentDescriptionId != iconEndContentDescriptionId) {
+            mIconEndContentDescriptionId = iconEndContentDescriptionId;
+            notifyChanged();
+        }
+    }
+
     @Override
     public void onBindViewHolder(PreferenceViewHolder holder) {
         super.onBindViewHolder(holder);