Android之应用内部实现国际化

这篇文章也提供了应用内部转换语言的方法： http://blog.csdn.net/sodino/article/details/6596709 。
1和2的方法是一样的，然而还是会调整了手机的语言设置
3对于大型应用来说显得有点儿笨重

针对于这两种程况，我也提供一种方法，即能在不改变手机设置的前提下，又能在大型项目上显得不会太笨重。直接上代码：

工具类：

import android.content.Context;

import android.content.SharedPreferences;

import android.content.res.Configuration;

import android.content.res.Resources;

import android.preference.PreferenceManager;

import android.util.DisplayMetrics;

import java.util.Locale;

public class LanguageSettingUtil {

    //单例模式-

    private static LanguageSettingUtil instance;

    private Context context;

    //存储当前系统的language设置-

    private String defaultLanguage;

    //存储当前系统Locale-

    private Locale defaultLocale;

    public final static String ENGLISH = "en";

    public final static String CHINESE = "zh";

    private LanguageSettingUtil(Context paramContext) {

        //得到系统语言-

        Locale localLocale = Locale.getDefault();

        this.defaultLocale = localLocale;

        //保存系统语言到defaultLanguage

        String str = this.defaultLocale.getLanguage();

        this.defaultLanguage = str;

        this.context = paramContext;

    }

    //检验自身是否被创建-

    public static LanguageSettingUtil get() {

        if (instance == null)

            throw new IllegalStateException(

                    "language setting not initialized yet");

        return instance;

    }

    //初始化-

    public static void init(Context paramContext) {

        if (instance == null) {

            instance = new LanguageSettingUtil(paramContext);

        }

    }

    // 创建Configuration-

    private Configuration getUpdatedLocaleConfig(String paramString) {

        Configuration localConfiguration = context.getResources()

                .getConfiguration();

        Locale localLocale = getLocale(paramString);

        localConfiguration.locale = localLocale;

        return localConfiguration;

    }

    //得到APP配置文件目前的语言设置-

    public String getLanguage() {

        SharedPreferences localSharedPreferences = PreferenceManager

                .getDefaultSharedPreferences(this.context);

        //如果当前程序没有设置language属性就返回系统语言，如果有，就返回以前的-

        return localSharedPreferences.getString("language",

                this.defaultLanguage);

    }

    //如果配置文件中没有语言设置-

    public Locale getLocale() {

        String str = getLanguage();

        return getLocale(str);

    }

    //创建新Locale并覆盖原Locale-

    public Locale getLocale(String paramString) {

        Locale localLocale = new Locale(paramString);

        Locale.setDefault(localLocale);

        return localLocale;

    }

    //刷新显示配置-

    public void refreshLanguage() {

        String str = getLanguage();

        Resources localResources = this.context.getResources();

        if (!localResources.getConfiguration().locale.getLanguage().equals(str)) {

            Configuration localConfiguration = getUpdatedLocaleConfig(str);

            // A structure describing general information about a display, such

            // as its size, density, and font scaling.

            DisplayMetrics localDisplayMetrics = localResources

                    .getDisplayMetrics();

            localResources.updateConfiguration(localConfiguration,

                    localDisplayMetrics);

        }

    }

    //设置系统语言-

    public void saveLanguage(String paramString) {

        PreferenceManager.getDefaultSharedPreferences(this.context).edit()

                .putString("language", paramString).commit();

    }

    //保存系统的语言设置到SharedPreferences-

    public void saveSystemLanguage() {

        PreferenceManager.getDefaultSharedPreferences(this.context).edit()

                .putString("PreSysLanguage", this.defaultLanguage).commit();

    }

    public void checkSysChanged(String cuerSysLanguage) {

        //如果系统语言设置发生变化-

        if (!cuerSysLanguage.equals(PreferenceManager

                .getDefaultSharedPreferences(this.context).getString(

                        "PreSysLanguage", "zh"))) {

            //如果系统保存了this对象，就在这里修改defaultLanguage的值为当前系统语言cuerSysLanguage

            this.defaultLanguage = cuerSysLanguage;

            saveLanguage(cuerSysLanguage);

            saveSystemLanguage();

        }

    }

}

调用类：

import android.app.Activity;

import android.os.Bundle;

import android.view.View;

import android.widget.Button;

import android.widget.TextView;

import com.example.internationaltest.util.LanguageSettingUtil;

public class MainActivity extends Activity {

    private LanguageSettingUtil languageSetting;

    private TextView h,w;

    private Button b;

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.main);

        h = (TextView) findViewById(R.id.h);

        w = (TextView) findViewById(R.id.w);

        b = (Button) findViewById(R.id.b);

        LanguageSettingUtil.init(this);　　// 初始化

        languageSetting = LanguageSettingUtil.get();　　// 检查是否已经初始化

    }

    public void change(View view){

        languageSetting.saveLanguage("en");　　// 设置为"en"语言

        LanguageSettingUtil.get().refreshLanguage();　　// 刷新

        h.setText(R.string.hello);

        w.setText(R.string.world);

        b.setText(R.string.change);

    }

}

巴特西

Android之应用内部实现国际化

最新文章

热门文章