Android(安卓)APP修改全局字体

字体下载网址：自定义字体.7z
1 复制工具类

package com.lym.uifont.utils;import android.app.Activity;import android.content.Context;import android.graphics.Typeface;import android.support.annotation.NonNull;import android.text.TextUtils;import android.view.View;import android.view.ViewGroup;import android.widget.TextView;import java.lang.reflect.Field;/** * @author liyanmei * @date 2019/6/25 * @describe */public class TypefaceUtil {    /**     * 为给定的字符串添加HTML红色标记，当使用Html.fromHtml()方式显示到TextView 的时候其将是红色的     *     * @param string 给定的字符串     * @return     */    public static String addHtmlRedFlag(String string) {        return "" + string + "";    }    /**     * 将给定的字符串中所有给定的关键字标红     *     * @param sourceString 给定的字符串     * @param keyword      给定的关键字     * @return 返回的是带Html标签的字符串，在使用时要通过Html.fromHtml()转换为Spanned对象再传递给TextView对象     */    public static String keywordMadeRed(String sourceString, String keyword) {        String result = "";        if (sourceString != null && !"".equals(sourceString.trim())) {            if (keyword != null && !"".equals(keyword.trim())) {                result = sourceString.replaceAll(keyword, "" + keyword + "");            } else {                result = sourceString;            }        }        return result;    }    /**     * Replace the font of specified view and it's children
     *     * @param root     The root view.     * @param fontPath font file path relative to 'assets' directory.     */    public static void replaceFont(@NonNull View root, String fontPath) {        if (root == null || TextUtils.isEmpty(fontPath)) {            return;        }        if (root instanceof TextView) { // If view is TextView or it's subclass, replace it's font            TextView textView = (TextView) root;            int style = Typeface.NORMAL;            if (textView.getTypeface() != null) {                style = textView.getTypeface().getStyle();            }            textView.setTypeface(createTypeface(root.getContext(), fontPath), style);        } else if (root instanceof ViewGroup) { // If view is ViewGroup, apply this method on it's child views            ViewGroup viewGroup = (ViewGroup) root;            for (int i = 0; i < viewGroup.getChildCount(); ++i) {                replaceFont(viewGroup.getChildAt(i), fontPath);            }        }    }    /**     * Replace the font of specified view and it's children
     * 通过递归批量替换某个View及其子View的字体改变Activity内部控件的字体(TextView,Button,EditText,CheckBox,RadioButton等)     *     * @param context  The view corresponding to the activity.     * @param fontPath font file path relative to 'assets' directory.     */    public static void replaceFont(@NonNull Activity context, String fontPath) {        replaceFont(getRootView(context), fontPath);    }    /*     * Create a Typeface instance with your font file     */    public static Typeface createTypeface(Context context, String fontPath) {        return Typeface.createFromAsset(context.getAssets(), fontPath);    }    /**     * 从Activity 获取 rootView 根节点     *     * @param context     * @return 当前activity布局的根节点     */    public static View getRootView(Activity context) {        return ((ViewGroup) context.findViewById(android.R.id.content)).getChildAt(0);    }    /**     * 通过改变App的系统字体替换App内部所有控件的字体(TextView,Button,EditText,CheckBox,RadioButton等)     *     * @param context     * @param fontPath 需要修改style样式为monospace：     *///        public static void replaceSystemDefaultFont(@NonNull Context context, @NonNull String fontPath) {        replaceTypefaceField("MONOSPACE", createTypeface(context, fontPath));    }    /**     * Replace field in class Typeface with reflection.
     */    private static void replaceTypefaceField(String fieldName, Object value) {        try {            Field defaultField = Typeface.class.getDeclaredField(fieldName);            defaultField.setAccessible(true);            defaultField.set(null, value);        } catch (NoSuchFieldException e) {            e.printStackTrace();        } catch (IllegalAccessException e) {            e.printStackTrace();        }    }}

2.修改style样式

3.将需要用到的ttf文件导入src/main/assets/fonts文件夹下
4.application的onCreate方法中调用

package com.lym.uifont;import android.app.Application;import com.lym.uifont.utils.TypefaceUtil;/** * @author liyanmei * @email lym_liyanmei@qq.com * @date 2019/6/25 * @describe */public class MyApp extends Application {    @Override    public void onCreate() {        super.onCreate();        TypefaceUtil.replaceSystemDefaultFont(this,"fonts/font_zhangcao.ttf");    }}

5 androidmanifest配置

<?xml version="1.0" encoding="utf-8"?>

参考网址：Android APP修改全局字体

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