导入工具类
package com.huawei.drive.utlis;
import android.app.Activity;
import android.content.Context;
import android.graphics.Typeface;
import android.text.TextUtils;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;
import androidx.annotation.NonNull;
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 "<font color=\"red\">" + string + "</font>";
}
/**
* 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, "<font color=\"red\">" + keyword + "</font>");
} else {
result = sourceString;
}
}
return result;
}
/**
* <p>Replace the font of specified view and it's children</p>
*
* @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);
}
}
}
/**
* <p>Replace the font of specified view and it's children</p>
* 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:
*/
// <style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
// <!-- Customize your theme here. -->
// <!-- Set system default typeface -->
// <item name="android:typeface">monospace</item>
// </style>
public static void replaceSystemDefaultFont(@NonNull Context context, @NonNull String fontPath) {
replaceTypefaceField("MONOSPACE", createTypeface(context, fontPath));
}
/**
* <p>Replace field in class Typeface with reflection.</p>
*/
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();
}
}
}
样式修改
<style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
<!-- Customize your theme here. -->
<!-- Set system default typeface -->
<item name="android:typeface">monospace</item>
</style>
app中使用
package com.lym.uifont;
import android.app.Application;
import com.lym.uifont.utils.TypefaceUtil;
/**
* @author liyanmei
* @email [email protected]
* @date 2019/6/25
* @describe
*/
public class MyApp extends Application {
@Override
public void onCreate() {
super.onCreate();
TypefaceUtil.replaceSystemDefaultFont(this,"fonts/font_zhangcao.ttf");
}
}
清单文件配置上apptheme
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.lym.uifont">
<application
android:name=".MyApp"
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:roundIcon="@mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="@style/AppTheme">
<activity android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>