Android修改系统中默认字体大小

本文是基于Android5.1的代码

---

device\mediatek\common\overlay\tablet\packages\apps\Settings\res\values-sw600dp\arrays/xml

其中4个item 分别代表着字体的大小：“小”、“普通”、“大”、“超大”

<?xml version="1.0" encoding="utf-8"?>
<!--
/*
**
** Copyright 2007 The Android Open Source Project
**
** Licensed under the Apache License, Version 2.0 (the "License");
** you may not use this file except in compliance with the License.
** You may obtain a copy of the License at
**
**     http://www.apache.org/licenses/LICENSE-2.0
**
** Unless required by applicable law or agreed to in writing, software
** distributed under the License is distributed on an "AS IS" BASIS,
** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
** See the License for the specific language governing permissions and
** limitations under the License.
*/
-->
<resources xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">

    <string-array name="entryvalues_font_size" translatable="false">
        <item>0.9</item>
        <item>1.0</item>
        <item>1.15</item>
        <item>1.2</item>-->
    </string-array>

</resources>

frameworks\base\core\java\android\content\res\Configuration.java

/**
 * Set this object to the system defaults.
 */
public void setToDefaults() {
     fontScale = 1.2f; //此处该默认值，例：现在字体为“超大”
     mcc = mnc = 0;
     locale = null;
     userSetLocale = false;
     touchscreen = TOUCHSCREEN_UNDEFINED;
     keyboard = KEYBOARD_UNDEFINED;
     keyboardHidden = KEYBOARDHIDDEN_UNDEFINED;
     hardKeyboardHidden = HARDKEYBOARDHIDDEN_UNDEFINED;
     navigation = NAVIGATION_UNDEFINED;
     navigationHidden = NAVIGATIONHIDDEN_UNDEFINED;
     orientation = ORIENTATION_UNDEFINED;
     screenLayout = SCREENLAYOUT_UNDEFINED;
     uiMode = UI_MODE_TYPE_UNDEFINED;
     screenWidthDp = compatScreenWidthDp = SCREEN_WIDTH_DP_UNDEFINED;
     screenHeightDp = compatScreenHeightDp = SCREEN_HEIGHT_DP_UNDEFINED;
     smallestScreenWidthDp = compatSmallestScreenWidthDp =         
     SMALLEST_SCREEN_WIDTH_DP_UNDEFINED;
     densityDpi = DENSITY_DPI_UNDEFINED;
     seq = 0;
     simSetLocale = false; /// M: sim locale feature
}