apk/源码地址

封面.png

用李白的一首诗来做本次演示

language.gif

1.res下新建values-zh （中文文件夹）并且新建一个strings.xml

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <string name="poetry">朝辞白帝彩云间，\n千里江陵一日还。\n两岸猿声啼不尽，\n轻舟已过万重山。</string>
    <string name="language">语言</string>
    <string name="title_activity_5">5.多语言适配</string>
</resources>

2.res下新建values-en （英文文件夹）并且新建一个strings.xml

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <string name="poetry">Energy-saving,\nTrinidad Jiangling day also.\nTwo monkeys do,\nHas been in a canoe.</string>
    <string name="language">Language</string>
    <string name="title_activity_5">5.Multilingual adaptation</string>
</resources>

3.res/layout下新建activity_5.xml 布局文件 引用资源文件中的string

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:gravity="center_horizontal"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:onClick="setLanguage"
        android:layout_marginTop="10dp"
        android:textAllCaps="false"
        android:text="@string/language"/>

    <TextView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginTop="10dp"
        android:layout_marginLeft="10dp"
        android:textSize="16sp"
        android:text="@string/poetry"/>

</LinearLayout>

4.新建Activity_5.class

public class _5_Activity extends BaseActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setLanguage();
        setContentView(R.layout.activity_5);
        setTitle(R.string.title_activity_5);
    }

    public void setLanguage(View v){
        String[] strings = {"简体中文","English"};
        //首次进入判断是否是中文语言
        int selected = getSharedPreferences("language", Context.MODE_PRIVATE).getInt("language",-1);
        if (selected==-1){
            String defaultLanguage = Locale.getDefault().toString();
            if (defaultLanguage.equals(Locale.CHINESE.toString())
                    || defaultLanguage.equals(Locale.SIMPLIFIED_CHINESE.toString())
                    ||defaultLanguage.equals(Locale.TRADITIONAL_CHINESE.toString()) ){
                selected = 0;
            }else{
                selected = 1;
            }
        }
        new AlertDialog.Builder(this)
            .setSingleChoiceItems(strings,selected,
                new DialogInterface.OnClickListener() {
                    //点击单选框某一项以后
                    public void onClick(DialogInterface dialogInterface, int i) {
                        SharedPreferences preferences = getSharedPreferences("language", Context.MODE_PRIVATE);
                        SharedPreferences.Editor editor = preferences.edit();
                        editor.putInt("language",i);
                        editor.apply();
                        dialogInterface.dismiss();
                        //重启activity
                        Intent intent = new Intent(_5_Activity.this, _5_Activity.class);
                        intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
                        startActivity(intent);
                    }
                })
            .create()
            .show();
    }

    /** 设置语言 */
    private void setLanguage() {
        SharedPreferences preferences = getSharedPreferences("language", Context.MODE_PRIVATE);
        int language = preferences.getInt("language", 0);
        //根据读取到存放在sp里面的数据 进行设置
        Configuration configuration = getResources().getConfiguration();
        switch (language){
            case 0:
                configuration.setLocale(Locale.CHINESE);
                break;
            case 1:
                configuration.setLocale( Locale.ENGLISH);
                break;
        }
        getResources().updateConfiguration(configuration,getResources().getDisplayMetrics());
    }

}

多语言的配置很简单，在于繁琐，当有几百个string的时候...如果您有改进的建议，欢迎在github上提交.