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Commit 35d7b89b authored by Fabrice Di Meglio's avatar Fabrice Di Meglio
Browse files

Add Preference highlighting 

- use a specific drawable for highlighting a Preference
at a given position
- also add PreferenceFragment.hasListView() as hidden API

Change-Id: If69854cf6c4852d0f45e2c3a9734b1f63b352f9d
parent 8b53023a

core/java/android/preference/PreferenceFragment.java

+20 −0
Original line number Diff line number Diff line
@@ -337,6 +337,26 @@ public abstract class PreferenceFragment extends Fragment implements 
        return mList;

    }



    /** @hide */

    public boolean hasListView() {

        if (mList != null) {

            return true;

        }

        View root = getView();

        if (root == null) {

            return false;

        }

        View rawListView = root.findViewById(android.R.id.list);

        if (!(rawListView instanceof ListView)) {

            return false;

        }

        mList = (ListView)rawListView;

        if (mList == null) {

            return false;

        }

        return true;

    }



    private void ensureList() {

        if (mList != null) {

            return;

core/java/android/preference/PreferenceGroupAdapter.java

+19 −4
Original line number Diff line number Diff line
@@ -20,6 +20,8 @@ import java.util.ArrayList; 
import java.util.Collections;

import java.util.List;



import android.graphics.Rect;

import android.graphics.drawable.Drawable;

import android.os.Handler;

import android.preference.Preference.OnPreferenceChangeInternalListener;

import android.view.View;
@@ -91,7 +93,8 @@ public class PreferenceGroupAdapter extends BaseAdapter 
        }

    };



    private int mActivatedPosition = -1;

    private int mHighlightedPosition = -1;

    private Drawable mHighlightedDrawable;



    private static class PreferenceLayout implements Comparable<PreferenceLayout> {

        private int resId;
@@ -212,8 +215,18 @@ public class PreferenceGroupAdapter extends BaseAdapter 
        return this.getItem(position).getId();

    }



    public void setActivated(int position) {

        mActivatedPosition = position;

    /**

     * @hide

     */

    public void setHighlighted(int position) {

        mHighlightedPosition = position;

    }



    /**

     * @hide

     */

    public void setHighlightedDrawable(Drawable drawable) {

        mHighlightedDrawable = drawable;

    }



    public View getView(int position, View convertView, ViewGroup parent) {
@@ -227,7 +240,9 @@ public class PreferenceGroupAdapter extends BaseAdapter 
            convertView = null;

        }

        View result = preference.getView(convertView, parent);

        result.setActivated(position == mActivatedPosition);

        if (position == mHighlightedPosition && mHighlightedDrawable != null) {

            result.setBackgroundDrawable(mHighlightedDrawable);

        }

        return result;

    }