详解Android更改APP语言模式的实现过程

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
  xmlns:tools="http://schemas.android.com/tools"
  android:layout_width="match_parent"
  android:layout_height="match_parent"
  android:orientation="vertical"
  android:padding="20dp" >

  <TextView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="@string/hellow" />

  <Button
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:onClick="changeLanguage" 
    android:text="语言切换" />

</LinearLayout>

package com.example.chinesepage;

import java.util.Locale;

import android.app.Activity;
import android.content.Intent;
import android.content.res.Configuration;
import android.content.res.Resources;
import android.os.Bundle;
import android.util.DisplayMetrics;
import android.view.View;
import android.widget.Toast;

public class MainActivity extends Activity {

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
  }

  /**
   * 点击按钮，更换语言
   * 
   * @param view
   */
  public void changeLanguage(View view) {
    Resources resources = getResources();
    Configuration configuration = resources.getConfiguration(); // 获取资源配置
    if (configuration.locale.equals(Locale.CHINA)) { // 判断当前语言是否是中文
      configuration.locale = Locale.ENGLISH; // 设置当前语言配置为英文
    } else {
      configuration.locale = Locale.CHINA; // 设置当前语言配置为中文
    }
    DisplayMetrics metrics = new DisplayMetrics();
    resources.updateConfiguration(configuration, metrics); // 更新配置文件
    sendBroadcast(new Intent("language")); // 发送广播，广播接受后重新开启此Activtiy以重新初始化界面语言.
//    Intent intent = new Intent(MainActivity.this, MainActivity.class); //或者可以直接跳转MainActivity
//    intent.setFlags(Intent.FLAG_ACTIVITY_NO_ANIMATION); //去除掉跳转的动画，让用户看起来好像没有跳转的感觉
//    startActivity(intent);
    finish();
  }
}

package com.example.chinesepage;

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;

/**
 * 自定义广播类 语言改变后重启Activity
 * 
 * @author asus
 * 
 */
public class ChangeReceiver extends BroadcastReceiver {
  private Intent mIntent;

  @Override
  public void onReceive(Context context, Intent intent) {
    mIntent = new Intent(context, MainActivity.class);
    mIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
    context.startActivity(mIntent);
  }
}

<resources>

  <string name="app_name">语言切换</string>
  <string name="hello_world">你好，World!</string>
  <string name="action_settings">设置</string>
  <string name="hellow">你好</string>

</resources>

<resources>

  <string name="app_name">ChinesePage</string>
  <string name="hello_world">Hello world!</string>
  <string name="action_settings">Settings</string>
  <string name="hellow">Hellow</string>

</resources>

 <receiver android:name="com.example.chinesepage.ChangeReceiver" >
      <intent-filter>
        <action android:name="language" />
      </intent-filter>
    </receiver>