android 资源文件国际化

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);
}
}