Why custom Preference has larger text size?

Question

I have a custom preference for showing icon with title and summary. But I don't know why its title has a larger text size compared to the normal preferences (built in one). Here are the source and layout xml of my custom preference. If you need more info, please let me know. Thank You.

public class IconPreferenceScreen extends Preference {

    public Drawable mIcon;
    private ImageView mImageView;

    public IconPreferenceScreen(Context context, AttributeSet attrs) {
        this(context, attrs, android.R.attr.preferenceStyle);
    }

    public IconPreferenceScreen(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
        setLayoutResource(R.layout.preference_icon);
        TypedArray a = context.obtainStyledAttributes(attrs,
                R.styleable.IconPreferenceScreen, defStyle, android.R.attr.preferenceStyle);
        mIcon = a.getDrawable(R.styleable.IconPreferenceScreen_iconPref);
        a.recycle();
    }

    public IconPreferenceScreen(Context context) {
        this(context, null);
        setLayoutResource(R.layout.preference_icon);
    }

    @Override
    public void onBindView(View view) {
        super.onBindView(view);
        mImageView = (ImageView) view.findViewById(R.id.icon);
        if (mImageView != null && mIcon != null) {
            mImageView.setImageDrawable(mIcon);
        }
    }

    public void setIcon(Drawable icon) {
        if (mImageView != null && icon != null) {
            mImageView.setImageDrawable(icon);
        }
    }

    @Override
    protected View onCreateView(ViewGroup parent) {
        View layout= super.onCreateView(parent);
        layout.setVisibility(View.VISIBLE);
        return layout;
    }    
}

Layout file here

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+android:id/widget_frame"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:minHeight="?android:attr/listPreferredItemHeight"
    android:gravity="center_vertical"
    android:paddingRight="?android:attr/scrollbarSize">

    <RelativeLayout
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginLeft="18dip"
        android:layout_marginRight="6dip"
        android:layout_marginTop="6dip"
        android:layout_marginBottom="6dip"
        android:layout_weight="1">

        <TextView android:id="@+android:id/title"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:singleLine="true"
            android:textAppearance="?android:attr/textAppearanceLarge"
            android:ellipsize="marquee"
            android:fadingEdge="horizontal" />

        <TextView android:id="@+android:id/summary"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_below="@android:id/title"
            android:layout_alignLeft="@android:id/title"
            android:textAppearance="?android:attr/textAppearanceSmall"
            android:maxLines="2" />

    </RelativeLayout>

    <ImageView
        android:id="@+id/icon"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginLeft="6dip"
        android:layout_marginRight="6dip"
        android:layout_gravity="center" />

</LinearLayout>

Answer 1

Your problem is likely that your title uses android:attr/textAppearanceLarge. Digging through the Android source code, the preferences_child.xml resource instead uses ?android:attr/textAppearanceMedium.