配置文件：frameworks/base/core/res/res/values/dimens.xml
修改条目：
<resources><!-- The width that is used when creating thumbnails of applications. -->
<dimen name="thumbnail_width">0dp</dimen>
<!-- The height that is used when creating thumbnails of applications. -->
<dimen name="thumbnail_height">0dp</dimen>
<!-- The standard size (both width and height) of an application icon that
will be displayed in the app launcher and elsewhere. -->
<dimen name="app_icon_size">48dip</dimen>
<dimen name="toast_y_offset">64dip</dimen>
<!-- Height of the status bar -->
<dimen name="status_bar_height">38dip</dimen>
<!-- Height of the status bar -->
<dimen name="status_bar_icon_size">38dip</dimen>
<!-- Margin at the edge of the screen to ignore touch events for in the windowshade. -->
<dimen name="status_bar_edge_ignore">5dp</dimen>
<!-- Size of the fastscroll hint letter -->
<dimen name="fastscroll_overlay_size">104dp</dimen>
<!-- Width of the fastscroll thumb -->
<dimen name="fastscroll_thumb_width">64dp</dimen>
<!-- Height of the fastscroll thumb -->
<dimen name="fastscroll_thumb_height">52dp</dimen>
<!-- Default height of a key in the password keyboard -->
<dimen name="password_keyboard_key_height">56dip</dimen>
<!-- Default correction for the space key in the password keyboard -->
<dimen name="password_keyboard_spacebar_vertical_correction">4dip</dimen>
</resources>