android 多语言(在APP里面内切换语言)
创建SharedPreferences的管理类
public class PreferenceUtil { private static SharedPreferences mSharedPreferences = null; private static Editor mEditor = null; public static void init(Context context){ if (null == mSharedPreferences) { mSharedPreferences = android.preference.PreferenceManager.getDefaultSharedPreferences(context) ; } } public static void removeKey(String key){ mEditor = mSharedPreferences.edit(); mEditor.remove(key); mEditor.commit(); } public static void removeAll(){ mEditor = mSharedPreferences.edit(); mEditor.clear(); mEditor.commit(); } public static void commitString(String key, String value){ mEditor = mSharedPreferences.edit(); mEditor.putString(key, value); mEditor.commit(); } public static String getString(String key, String faillValue){ return mSharedPreferences.getString(key, faillValue); } public static void commitInt(String key, int value){ mEditor = mSharedPreferences.edit(); mEditor.putInt(key, value); mEditor.commit(); } public static int getInt(String key, int failValue){ return mSharedPreferences.getInt(key, failValue); } public static void commitLong(String key, long value){ mEditor = mSharedPreferences.edit(); mEditor.putLong(key, value); mEditor.commit(); } public static long getLong(String key, long failValue) { return mSharedPreferences.getLong(key, failValue); } public static void commitBoolean(String key, boolean value){ mEditor = mSharedPreferences.edit(); mEditor.putBoolean(key, value); mEditor.commit(); } public static Boolean getBoolean(String key, boolean failValue){ return mSharedPreferences.getBoolean(key, failValue); } }
创建BaseActivity类
public class BaseActivity extends Activity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); //初始化PreferenceUtil PreferenceUtil.init(this); //根据上次的语言设置,重新设置语言 switchLanguage(PreferenceUtil.getString("language", "zh")); } protected void switchLanguage(String language) { //设置应用语言类型 Resources resources = getResources(); Configuration config = resources.getConfiguration(); DisplayMetrics dm = resources.getDisplayMetrics(); if (language.equals("en")) { config.locale = Locale.ENGLISH; } else { config.locale = Locale.SIMPLIFIED_CHINESE; } resources.updateConfiguration(config, dm); //保存设置语言的类型 PreferenceUtil.commitString("language", language); } }
MainActivity
public class MainActivity extends BaseActivity implements OnClickListener{ private Dialog mDialog; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); DisplayMetrics dm=new DisplayMetrics(); getWindowManager().getDefaultDisplay().getMetrics(dm); String str="mobile分辨率为:"+dm.widthPixels+"X"+dm.heightPixels; Log.i("L",str); TextView textView = (TextView) findViewById(R.id.text); Button button = (Button) findViewById(R.id.btn); Button button2 = (Button) findViewById(R.id.btn_2); textView.setText(R.string.hello_world); button.setText(R.string.switch_language); button.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { if (mDialog == null) { LayoutInflater inflater = getLayoutInflater(); View layout = inflater.inflate(R.layout.dialog_select_lanuage,null); TextView english = (TextView) layout.findViewById(R.id.select_english); TextView chinese = (TextView) layout.findViewById(R.id.select_chinese); mDialog = new Dialog(MainActivity.this, R.style.Custom_Dialog_Theme); mDialog.setCanceledOnTouchOutside(false); english.setOnClickListener(MainActivity.this); chinese.setOnClickListener(MainActivity.this); mDialog.setContentView(layout); } mDialog.show(); } }); button2.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { Intent it = new Intent(MainActivity.this, SecondActivity.class); startActivity(it); } }); } @Override public void onClick(View v) { mDialog.dismiss(); switch (v.getId()) { case R.id.select_english: switchLanguage("en"); break; case R.id.select_chinese: switchLanguage("zh"); break; default: break; } //更新语言后,destroy当前页面,重新绘制 finish(); Intent it = new Intent(MainActivity.this, MainActivity.class); startActivity(it); } }
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