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我想在微调器下拉列表更改时更改语言。我有以下代码，但即使是简单的“Hello World”也无法更改语言。我在 values、values-es 和 values-fr 文件夹中定义了值每种语言的“hello_world”和“hello”字符串。我在这里做错了什么。这是我下面的 MainActivity.java 代码

package com.example.changelanguage;

import android.os.Bundle;
import android.app.Activity;
import android.util.Log;
import android.view.Menu;

import java.util.ArrayList;
import java.util.Locale;

import android.app.Activity;
import android.content.res.Configuration;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.SubMenu;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Spinner;
import android.widget.Toast;
import android.widget.AdapterView.OnItemSelectedListener;
import android.util.*;

public class MainActivity extends Activity {

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

        ArrayList<String> languages = new ArrayList<String>();
        languages.add("English");
        languages.add("French");
        languages.add("Spanish");

        Spinner spinner = (Spinner)findViewById(R.id.spinner1);
        spinner.setAdapter(new ArrayAdapter<String>(this,android.R.layout.simple_spinner_dropdown_item, languages));


        spinner.setOnItemSelectedListener(new OnItemSelectedListener() {
            @Override
            public void onItemSelected(AdapterView<?> parentView, View selectedItemView, int position, long id) {
                 Log.v("Value", "Language Value: " + position);
                    if(position == 1){
                         //Change text to Spanish
                        setLocale("es");
                    }
                    else{
                        //Change text to French
                         setLocale("fr");
                    }
                    Toast.makeText(
                            parentView.getContext(), "Selected Lang : " + 
                    parentView.getItemAtPosition(position).toString(), Toast.LENGTH_SHORT).show();
            }

            @Override
            public void onNothingSelected(AdapterView<?> parentView) {
                // your code here
            }

            });


    }


    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.

        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }



    public void setLocale(String localeCode){
        Locale locale = new Locale(localeCode);
        Locale.setDefault(locale);
        Configuration config = new Configuration();
        config.locale = locale;
        getBaseContext().getResources().updateConfiguration(config, getBaseContext().getResources().getDisplayMetrics());
    }           

}

AndroidMainfest.xml 的代码如下：-

    <?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.changelanguage"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="11"
        android:targetSdkVersion="17" />

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppBaseTheme" >
        <activity
            android:name="com.example.changelanguage.MainActivity"
            android:label="@string/app_name" 
            android:configChanges="locale">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />                
            </intent-filter>

        </activity>
    </application>

</manifest>

相对布局的代码是：-

    <RelativeLayout 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:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context=".MainActivity" >

    <TextView
        android:id="@+id/textView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/hello_world" />

    <Spinner
        android:id="@+id/spinner1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@+id/textView1"
        android:layout_marginTop="83dp"
         />

    <TextView
        android:id="@+id/textView2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@+id/spinner1"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="66dp"
        android:text="@string/hello" />

</RelativeLayout>
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