首先添加英语对应的xml文件,在android下，res文件夹右键new->Android Resource File->local，再点击>>选择ji:Yiddish(美国国旗)->us->ok

这样就添加了一个app英语的string.xml文件，将需要改变语言的text添加进去，并给适当的name，在java中通过getString(R.string.name)来查找对应的text，有一个默认的strings.xml文件，这个文件是与其对应的。

默认strings.xml文件

<resources>
    <string name="lange">语言:中文</string>
    <string name="folder_create_success">创建文件夹</string>
    <string name="folder_delete_success">删除文件夹</string>
</resources>

英语对应的strings.xml文件

<resources>
    <string name="lange">Language:English</string>
    <string name="folder_create_success">Create a folder</string>
    <string name="folder_delete_success">Delete a folder</string>
</resources>

SPUtils类

public class SPUtils {

    private static final String FILE_NAME = "muzi";

    public static void put(Context context, String key, Object object) {

        SharedPreferences sp = context.getSharedPreferences(FILE_NAME,
                Context.MODE_PRIVATE);
        SharedPreferences.Editor editor = sp.edit();

        if (object instanceof String) {
            editor.putString(key, (String) object);
        } else if (object instanceof Integer) {
            editor.putInt(key, (Integer) object);
        } else if (object instanceof Boolean) {
            editor.putBoolean(key, (Boolean) object);
        } else if (object instanceof Float) {
            editor.putFloat(key, (Float) object);
        } else if (object instanceof Long) {
            editor.putLong(key, (Long) object);
        } else {
            editor.putString(key, object.toString());
        }
        editor.apply();
    }



    public static Object get(Context context, String key, Object defaultObject) {
        SharedPreferences sp = context.getSharedPreferences(FILE_NAME,
                Context.MODE_PRIVATE);

        if (defaultObject instanceof String) {
            return sp.getString(key, (String) defaultObject);
        } else if (defaultObject instanceof Integer) {
            return sp.getInt(key, (Integer) defaultObject);
        } else if (defaultObject instanceof Boolean) {
            return sp.getBoolean(key, (Boolean) defaultObject);
        } else if (defaultObject instanceof Float) {
            return sp.getFloat(key, (Float) defaultObject);
        } else if (defaultObject instanceof Long) {
            return sp.getLong(key, (Long) defaultObject);
        }

        return null;
    }

}

Utils类

public class Utils {
    private static final String KEY_APP_LANGUAGE = "KEY_APP_LANGUAGE";

    //更改App语言
    public static void changeAppLanguage(Context context, Locale locale, boolean persistence) {

        Resources resources = context.getResources();
        DisplayMetrics metrics = resources.getDisplayMetrics();
        Configuration configuration = resources.getConfiguration();
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1) {
            configuration.setLocale(locale);
        } else {
            configuration.locale = locale;
        }
        resources.updateConfiguration(configuration, metrics);
        if (persistence) {
            saveLanguageSetting(context, locale);
        }
    }


    public static boolean isSameWithSetting(Context context) {
        String lang = context.getResources().getConfiguration().locale.getLanguage();
        return lang.equals(getAppLanguage(context));
    }
//    04.10 测试


    //App保存语言设置
    public static void saveLanguageSetting(Context context,Locale locale){

        SPUtils.put(context,KEY_APP_LANGUAGE,locale.getLanguage());

    }

    public static String getAppLanguage(Context context){
        return (String)SPUtils.get(context,KEY_APP_LANGUAGE,Locale.getDefault().getLanguage());
    }



    public static Locale getAppLocale(Context context){
        String lang = (String)SPUtils.get(context,KEY_APP_LANGUAGE,Locale.getDefault().getLanguage());
        if(!lang.equals(Locale.SIMPLIFIED_CHINESE.getLanguage())&&!lang.equals(Locale.US.getLanguage())){
            lang = Locale.SIMPLIFIED_CHINESE.getLanguage();
        }
        Locale locale = new Locale(lang);
        return locale;
    }
}

MainActivity.class

        
    private void initView()
    {
        setLange();
        bt_menu_language.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                ButtonAnimation.initButton(bt_menu_language);
                Locale appLocale = Utils.getAppLocale(MainActivity.this);
                String appLanguage = Utils.getAppLanguage(MainActivity.this);
                Utils.changeAppLanguage(MainActivity.this, appLocale, true); //更改app语言  布尔值为true保存进入SPUTils
                changeLange();
            }
        });
    }

    public void setLange() {
        String lan = Utils.getAppLanguage(this);
        if (lan.equals("en")) {
            setLocale(Locale.US);
        } else if (lan.equals("zh")) {
            setLocale(Locale.SIMPLIFIED_CHINESE);
        }
    }

    private void changeLange() {
        String lan = Utils.getAppLanguage(this);
        Log.e("本地语言类型", "language=" + lan);
        if (lan.equals("zh")) {
            setLocale(Locale.US);
        } else if (lan.equals("en")) {
            setLocale(Locale.SIMPLIFIED_CHINESE);
        }
        recreate();//重新刷新
    }


    public void setLocale(Locale myLocale) {
        Resources res = getResources();
        DisplayMetrics dm = res.getDisplayMetrics();
        Configuration conf = res.getConfiguration();
        conf.locale = myLocale;
        res.updateConfiguration(conf, dm);
        Utils.saveLanguageSetting(this, myLocale);
    }

点击按钮就能将app语言在中文与英语之间切换。

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切换中英文

首先需要中英文的string.xml

切换应用显示中文或者英文

判断当前系统语言

String language = getResources().getConfiguration().locale.getCountry();

切换应用显示语言

if (language.equalsIgnoreCase("cn")) {
            Resources resources = getResources();
            Configuration config = resources.getConfiguration();
            DisplayMetrics dm = resources.getDisplayMetrics();
            config.locale = Locale.CHINA;
            resources.updateConfiguration(config, dm);
        } else {
            Resources resources = getResources();
            Configuration config = resources.getConfiguration();
            DisplayMetrics dm = resources.getDisplayMetrics();
            config.locale = Locale.US;
            resources.updateConfiguration(config, dm);
        }

刷新当前页面:

一般切换语言后想要在当前页面查看中英文切换效果

		finish();
        Intent intent = new Intent(ChangeLaugageActivity.this, ChangeLaugageActivity.class);
        startActivity(intent);
        overridePendingTransition(0, 0);

**overridePendingTransition(0,0)**去除页面切换动画

重启app:

一般切换语言后需要重新唤起app , 才能生效

			killAllActivity();
            startActivity(new Intent(this, MainActivity.class));
            finish();

注意:

7.0安卓系统可以设置默认语言以及次选语言 , 而且在MyApplication下设置全局切换语言无效 , 可在全局的BaseActivity下的onCreate中进行语言设置