Android国际化-中英文切换

不想废话，直接上干货

@Override
    protected void attachbaseContext(Context newbase) {
        Locale newLocale;
        if (SPUtil.getBoolean(newbase,"isEN")) {
            //设置英文
            newLocale = Locale.ENGLISH;
        } else {
            //设置中文
            newLocale = Locale.SIMPLIFIED_CHINESE;
        }
        Context context = MyContextWrapper.wrap(newbase, newLocale);
        super.attachbaseContext(context);
    }

是的，直接在你继承的baseActivity里面重载（@Override）attachbaseContext方法即可。

里面有一个自定义的MyContextWrapper：

import android.content.Context;
import android.content.ContextWrapper;
import android.content.res.Configuration;
import android.content.res.Resources;
import android.os.Build;
import android.os.LocaleList;

import java.util.Locale;

public class MyContextWrapper  extends ContextWrapper {

    public MyContextWrapper(Context base) {
        super(base);
    }

    public static ContextWrapper wrap(Context context, Locale newLocale) {

        Resources res = context.getResources();
        Configuration configuration = res.getConfiguration();

        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {

            configuration.setLocale(newLocale);
            LocaleList localeList = new LocaleList(newLocale);
            LocaleList.setDefault(localeList);
            configuration.setLocales(localeList);
            context = context.createConfigurationContext(configuration);

        } else if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {

            configuration.setLocale(newLocale);
            context = context.createConfigurationContext(configuration);

        }

        return new ContextWrapper(context);
    }
}

关于SPUtil，就是一个简单的SharedPreferences内容存取类：

import android.content.Context;
import android.content.SharedPreferences;

public class SPUtil {

    
    public static void put(Context context, String key, Object value) {
        SharedPreferences sp = context.getSharedPreferences("config", Context.MODE_PRIVATE);
        SharedPreferences.Editor edit = sp.edit();
        if (value instanceof String) {
            edit.putString(key, (String) value);
        } else if (value instanceof Integer) {
            //JDK1.7之后可以把引用数据类型转为基本数据类型
            edit.putInt(key, (int) value);
        } else if (value instanceof Boolean) {
            edit.putBoolean(key, (boolean) value);
        }
        edit.apply();
    }
    
    public static String getString(Context context, String key) {
        SharedPreferences sp = context.getSharedPreferences("config", Context.MODE_PRIVATE);
        return sp.getString(key, "");
    }
    
    public static int getInt(Context context, String key) {
        SharedPreferences sp = context.getSharedPreferences("config", Context.MODE_PRIVATE);
        return sp.getInt(key, 0);
    }

    
    public static boolean getBoolean(Context context, String key) {
        SharedPreferences sp = context.getSharedPreferences("config", Context.MODE_PRIVATE);
        return sp.getBoolean(key, false);
    }

    
    public static void clearData(Context context){
        SharedPreferences sp = context.getSharedPreferences("config", Context.MODE_PRIVATE);
        sp.edit().clear().apply();
    }

}

代码到这里也就结束了，下面是添加国际化语言的简单步骤：

 切记修改语言之后一定要重新加载页面，不然不会立即生效

SPUtil.put(SettingActivity.this,"isEN",isChecked);
recreate();