android APP国际化一键切换实现

首先看目录：

上代码：

package com.loaderman.language;

import android.content.res.Configuration;
import android.content.res.Resources;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v7.app.AppCompatActivity;
import android.util.DisplayMetrics;

import org.greenrobot.eventbus.EventBus;
import org.greenrobot.eventbus.Subscribe;
import org.greenrobot.eventbus.ThreadMode;

import java.util.Locale;

public class BaseActivity extends AppCompatActivity {

    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        EventBus.getDefault().register(this);
        changeAppLanguage();
    }

    @Subscribe(threadMode = ThreadMode.MAIN)
    public void onEvent(String str) {
        switch (str) {
            case "EVENT_REFRESH_LANGUAGE":
                changeAppLanguage();
                recreate();//刷新界面
                break;
        }
    }

    public void changeAppLanguage() {
        String sta = Store.getLanguageLocal(this);
        if(sta != null && !"".equals(sta)){
            // 本地语言设置
            Locale myLocale = new Locale(sta);
            Resources res = getResources();
            DisplayMetrics dm = res.getDisplayMetrics();
            Configuration conf = res.getConfiguration();
            conf.locale = myLocale;
            res.updateConfiguration(conf, dm);
        }

    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        EventBus.getDefault().unregister(this);
    }
}

package com.loaderman.language;

import android.content.Context;
import android.content.SharedPreferences;
import android.preference.PreferenceManager;

public class Store {

    public static void setLanguageLocal(Context context, String language){
        SharedPreferences preferences;
        SharedPreferences.Editor editor;
        preferences = PreferenceManager.getDefaultSharedPreferences(context);
        editor = preferences.edit();
        editor.putString("language", language);
        editor.commit();
    }

    public static String getLanguageLocal(Context context){
        SharedPreferences preferences;
        preferences = PreferenceManager.getDefaultSharedPreferences(context);
        String language = preferences.getString("language", "");
        return language;
    }
}

import android.content.Intent;
import android.os.Bundle;
import android.view.View;

public class MainActivity extends BaseActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        setTitle("第一个Activity");
        findViewById(R.id.btn_setting).setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                startActivity(new Intent(MainActivity.this, SettingActivity.class));
            }
        });
    }
}

package com.loaderman.language;

import android.content.DialogInterface;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v7.app.AlertDialog;
import android.view.View;
import android.widget.Button;

import org.greenrobot.eventbus.EventBus;

public class SettingActivity extends BaseActivity {

    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        setTitle("设置Activity");
        final String[] cities = {getString(R.string.lan_chinese), getString(R.string.lan_en), getString(R.string.lan_ja), getString(R.string.lan_de)};
        final String[] locals = {"zh_CN", "en", "ja", "de"};
        Button button = (Button)findViewById(R.id.btn_setting);
        button.setText("Language");
        button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                AlertDialog.Builder builder = new AlertDialog.Builder(SettingActivity.this);
                builder.setIcon(R.mipmap.ic_launcher);
                builder.setTitle(R.string.select_language);
                builder.setItems(cities, new DialogInterface.OnClickListener()
                {
                    @Override
                    public void onClick(DialogInterface dialog, int which)
                    {
                        Store.setLanguageLocal(SettingActivity.this, locals[which]);
                        EventBus.getDefault().post("EVENT_REFRESH_LANGUAGE");
                    }
                });
                builder.show();
            }
        });
    }
}

效果图：