android动态设置app当前运行语言的方法

packagecom.example.androidtest;

importjava.util.Locale;

importandroid.os.Bundle;

importandroid.app.Activity;

importandroid.content.Intent;

importandroid.content.res.Configuration;

importandroid.content.res.Resources;

importandroid.util.DisplayMetrics;

importandroid.view.Menu;

importandroid.view.View;

importandroid.widget.Button;

publicclassMainActivityextendsActivity {

    @Override

    protectedvoidonCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        Button btnLang = (Button) findViewById(R.id.btn);

        // 按下按钮改变语言类型，在“简体中文”和“英文”之间切换

        btnLang.setOnClickListener(newView.OnClickListener() {

            @Override

            publicvoidonClick(View v) {

                // 获取当前Locale（包含语言信息）

                Locale curLocale = getResources().getConfiguration().locale;

                // 判断语言类型，有以下两种判断方式

                // 方法一，通过Locale的equals方法

                // public boolean equals (Object object)

                //   Returns true if object is a locale with the same language, country and variant.

                if(curLocale.equals(Locale.SIMPLIFIED_CHINESE)) {

                    setLang(Locale.ENGLISH);

                }else{

                    setLang(Locale.SIMPLIFIED_CHINESE);

                }

                // 方法二，通过语言码，getLanguage()方法可以获得对应语言码

                // public String getLanguage ()

                //  Returns the language code for this Locale or the empty string if no language was set.

//              if (curLocale.getLanguage().equals(Locale.SIMPLIFIED_CHINESE.getLanguage())) {

//                  setLang(Locale.ENGLISH);

//              } else {

//                  setLang(Locale.SIMPLIFIED_CHINESE);

//              }

            }

        });

    }

    privatevoidsetLang(Locale l) {

        // 获得res资源对象

        Resources resources = getResources();

        // 获得设置对象

        Configuration config = resources.getConfiguration();

        // 获得屏幕参数：主要是分辨率，像素等。

        DisplayMetrics dm = resources.getDisplayMetrics();

        // 语言

        config.locale = l;

        resources.updateConfiguration(config, dm);

        // 刷新activity才能马上奏效

        startActivity(newIntent().setClass(MainActivity.this,

            MainActivity.class));

        MainActivity.this.finish();

    }

    @Override

    publicbooleanonCreateOptionsMenu(Menu menu) {

        // Inflate the menu; this adds items to the action bar if it is present.

        getMenuInflater().inflate(R.menu.activity_main, menu);

        returntrue;

    }

}

/**

 * 拷贝数据库到sd卡

 *

 * @deprecated

 */

publicstaticvoidcopyDataBaseToSD(){

     if(!Environment.MEDIA_MOUNTED.equals(Environment.getExternalStorageState())) {

   return;

 }

     File dbFile =newFile(MvpApplication.getApplication().getDatabasePath("dandy")+".db");

     File file =newFile(Environment.getExternalStorageDirectory(),"seeker.db");

     FileChannel inChannel =null,outChannel =null;

     try{

        file.createNewFile();

        inChannel =newFileInputStream(dbFile).getChannel();

        outChannel =newFileOutputStream(file).getChannel();

        inChannel.transferTo(0, inChannel.size(), outChannel);

    }catch(Exception e) {

        LogUtils.e(TAG,"copy dataBase to SD error.");

        e.printStackTrace();

    }finally{

        try{

            if(inChannel !=null) {

                inChannel.close();

                inChannel =null;

            }

            if(outChannel !=null){

                outChannel.close();

                outChannel =null;

            }

        }catch(IOException e) {

            LogUtils.e(TAG,"file close error.");

            e.printStackTrace();

        }

    }

}