Question

我想动态更改我的应用程序语言，而不是输入任何硬编码的字符串语言，例如＆＃34; us＆＃34;＆＃34; uk＆＃34;等等我想获得设备语言列表。重要的是我想在对话框列表中打开语言列表而不是设置。当用户按下文本视图设备打开所有语言列表时，当用户选择任何语言时，语言将设置在同一文本视图上她按下了同时整个应用程序语言的变化。默认情况下，选择一种语言，例如英语。

请以代码的形式帮助我，还要提供一些信息，以及它在＆＃34; OnActivityResult＆＃34;或任何其他过程。非常谷歌我发现每个静态代码都意味着硬代码字符串。

Answer 1

您可以使用

获取设备的选定语言

Locale.getDefault().getDisplayLanguage();

您可以设置语言（英语）

Locale.setDefault("en")

编辑：

这是Android Emulators的CustomLocale App的源代码 enter image description here

package com.android.customlocale;


import android.app.ActivityManagerNative;
import android.app.IActivityManager;
import android.app.ListActivity;
import android.content.Intent;
import android.content.SharedPreferences;
import android.content.res.Configuration;
import android.os.Bundle;
import android.os.RemoteException;
import android.util.Log;
import android.view.ContextMenu;
import android.view.MenuItem;
import android.view.View;
import android.view.ContextMenu.ContextMenuInfo;
import android.widget.Button;
import android.widget.ListAdapter;
import android.widget.ListView;
import android.widget.SimpleAdapter;
import android.widget.TextView;
import android.widget.Toast;
import android.widget.AdapterView.AdapterContextMenuInfo;

import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.HashMap;
import java.util.Locale;
import java.util.Map;

/**
 * Displays the list of system locales as well as maintain a custom list of user
 * locales. The user can select a locale and apply it or it can create or remove
 * a custom locale.
 */
public class CustomLocaleActivity extends ListActivity {

private static final String CUSTOM_LOCALES_SEP = " ";
private static final String CUSTOM_LOCALES = "custom_locales";
private static final String KEY_CUSTOM = "custom";
private static final String KEY_NAME = "name";
private static final String KEY_CODE = "code";

private static final String TAG = "LocaleSetup";
private static final boolean DEBUG = true;

/** Request code returned when the NewLocaleDialog activity finishes. */
private static final int UPDATE_LIST = 42;
/** Menu item id for applying a locale */
private static final int MENU_APPLY = 43;
/** Menu item id for removing a custom locale */
private static final int MENU_REMOVE = 44;

/** List view displaying system and custom locales. */
private ListView mListView;
/** Textview used to display current locale */
private TextView mCurrentLocaleTextView;
/** Private shared preferences of this activity. */
private SharedPreferences mPrefs;

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

    mPrefs = getPreferences(MODE_PRIVATE);

    Button newLocaleButton = (Button) findViewById(R.id.new_locale);

    newLocaleButton.setOnClickListener(new View.OnClickListener() {
        public void onClick(View v) {
            Intent i = new Intent(CustomLocaleActivity.this, NewLocaleDialog.class);
            startActivityForResult(i, UPDATE_LIST);
        }
    });

    mListView = (ListView) findViewById(android.R.id.list);
    mListView.setFocusable(true);
    mListView.setFocusableInTouchMode(true);
    mListView.requestFocus();
    registerForContextMenu(mListView);
    setupLocaleList();

    mCurrentLocaleTextView = (TextView) findViewById(R.id.current_locale);
    displayCurrentLocale();
}

@SuppressWarnings("unchecked")
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);

    if (requestCode == UPDATE_LIST && resultCode == RESULT_OK && data != null) {
        String locale = data.getExtras().getString(NewLocaleDialog.INTENT_EXTRA_LOCALE);
        if (locale != null && locale.length() > 0) {
            // Get current custom locale list
            String customLocales = mPrefs.getString(CUSTOM_LOCALES, null);

            // Update
            if (customLocales == null) {
                customLocales = locale;
            } else {
                customLocales += CUSTOM_LOCALES_SEP + locale;
            }

            // Save prefs
            if (DEBUG) {
                Log.d(TAG, "add/customLocales: " + customLocales);
            }
            mPrefs.edit().putString(CUSTOM_LOCALES, customLocales).commit();

            Toast.makeText(this, "Added custom locale: " + locale, Toast.LENGTH_SHORT).show();

            // Update list view
            setupLocaleList();

            // Find the item to select it in the list view
            ListAdapter a = mListView.getAdapter();
            for (int i = 0; i < a.getCount(); i++) {
                Object o = a.getItem(i);
                if (o instanceof Map<?, ?>) {
                    String code = ((Map<String, String>) o).get(KEY_CODE);
                    if (code != null && code.equals(locale)) {
                        mListView.setSelection(i);
                        break;
                    }
                }
            }

            if (data.getExtras().getBoolean(NewLocaleDialog.INTENT_EXTRA_SELECT)) {
                selectLocale(locale);
            }
        }
    }
}

private void setupLocaleList() {
    if (DEBUG) {
        Log.d(TAG, "Update locate list");
    }

    ArrayList<Map<String, String>> data = new ArrayList<Map<String, String>>();

    // Insert all system locales
    String[] locales = getAssets().getLocales();
    for (String locale : locales) {
        Locale loc = new Locale(locale);

        Map<String, String> map = new HashMap<String, String>(1);
        map.put(KEY_CODE, locale);
        map.put(KEY_NAME, loc.getDisplayName());
        data.add(map);
    }
    locales = null;

    // Insert all custom locales
    String customLocales = mPrefs.getString(CUSTOM_LOCALES, "");
    if (DEBUG) {
        Log.d(TAG, "customLocales: " + customLocales);
    }
    for (String locale : customLocales.split(CUSTOM_LOCALES_SEP)) {
        if (locale != null && locale.length() > 0) {
            Locale loc = new Locale(locale);

            Map<String, String> map = new HashMap<String, String>(1);
            map.put(KEY_CODE, locale);
            map.put(KEY_NAME, loc.getDisplayName() + " [Custom]");
            // the presence of the "custom" key marks it as custom.
            map.put(KEY_CUSTOM, "");
            data.add(map);
        }
    }

    // Sort all locales by code
    Collections.sort(data, new Comparator<Map<String, String>>() {
        public int compare(Map<String, String> lhs, Map<String, String> rhs) {
            return lhs.get(KEY_CODE).compareTo(rhs.get(KEY_CODE));
        }
    });

    // Update the list view adapter
    mListView.setAdapter(new SimpleAdapter(this, data, R.layout.list_item, new String[] {
            KEY_CODE, KEY_NAME}, new int[] {R.id.locale_code, R.id.locale_name}));
}

@SuppressWarnings("unchecked")
@Override
public void onCreateContextMenu(ContextMenu menu, View v, ContextMenuInfo menuInfo) {
    super.onCreateContextMenu(menu, v, menuInfo);

    if (menuInfo instanceof AdapterContextMenuInfo) {
        int position = ((AdapterContextMenuInfo) menuInfo).position;
        Object o = mListView.getItemAtPosition(position);
        if (o instanceof Map<?, ?>) {
            String locale = ((Map<String, String>) o).get(KEY_CODE);
            String custom = ((Map<String, String>) o).get(KEY_CUSTOM);

            if (custom == null) {
                menu.setHeaderTitle("System Locale");
                menu.add(0, MENU_APPLY, 0, "Apply");
            } else {
                menu.setHeaderTitle("Custom Locale");
                menu.add(0, MENU_APPLY, 0, "Apply");
                menu.add(0, MENU_REMOVE, 0, "Remove");
            }
        }
    }
}

@SuppressWarnings("unchecked")
@Override
public boolean onContextItemSelected(MenuItem item) {

    String pendingLocale = null;
    boolean is_custom = false;

    ContextMenuInfo menuInfo = item.getMenuInfo();
    if (menuInfo instanceof AdapterContextMenuInfo) {
        int position = ((AdapterContextMenuInfo) menuInfo).position;
        Object o = mListView.getItemAtPosition(position);
        if (o instanceof Map<?, ?>) {
            pendingLocale = ((Map<String, String>) o).get(KEY_CODE);
            is_custom = ((Map<String, String>) o).get(KEY_CUSTOM) != null;
        }
    }

    if (pendingLocale == null) {
        // should never happen
        return super.onContextItemSelected(item);
    }

    if (item.getItemId() == MENU_REMOVE) {
        // Get current custom locale list
        String customLocales = mPrefs.getString(CUSTOM_LOCALES, "");

        if (DEBUG) {
            Log.d(TAG, "Remove " + pendingLocale + " from custom locales: " + customLocales);
        }

        // Update
        StringBuilder sb = new StringBuilder();
        for (String locale : customLocales.split(CUSTOM_LOCALES_SEP)) {
            if (locale != null && locale.length() > 0 && !locale.equals(pendingLocale)) {
                if (sb.length() > 0) {
                    sb.append(CUSTOM_LOCALES_SEP);
                }
                sb.append(locale);
            }
        }
        String newLocales = sb.toString();
        if (!newLocales.equals(customLocales)) {
            // Save prefs
            mPrefs.edit().putString(CUSTOM_LOCALES, customLocales).commit();

            Toast.makeText(this, "Removed custom locale: " + pendingLocale, Toast.LENGTH_SHORT)
                    .show();
        }

    } else if (item.getItemId() == MENU_APPLY) {
        selectLocale(pendingLocale);
    }

    return super.onContextItemSelected(item);
}

private void selectLocale(String locale) {
    if (DEBUG) {
        Log.d(TAG, "Select locale " + locale);
    }

    try {
        IActivityManager am = ActivityManagerNative.getDefault();
        Configuration config = am.getConfiguration();

        Locale loc = null;

        String[] langCountry = locale.split("_");
        if (langCountry.length == 2) {
            loc = new Locale(langCountry[0], langCountry[1]);
        } else {
            loc = new Locale(locale);
        }

        config.locale = loc;

        // indicate this isn't some passing default - the user wants this
        // remembered
        config.userSetLocale = true;

        am.updateConfiguration(config);

        Toast.makeText(this, "Select locale: " + locale, Toast.LENGTH_SHORT).show();
    } catch (RemoteException e) {
        if (DEBUG) {
            Log.e(TAG, "Select locale failed", e);
        }
    }
}

private void displayCurrentLocale() {
    try {
        IActivityManager am = ActivityManagerNative.getDefault();
        Configuration config = am.getConfiguration();

        if (config.locale != null) {
            String text = String.format("%s - %s",
                    config.locale.toString(),
                    config.locale.getDisplayName());
            mCurrentLocaleTextView.setText(text);
        }
    } catch (RemoteException e) {
        if (DEBUG) {
            Log.e(TAG, "get current locale failed", e);
        }
    }
}

}

如何从android中的设备语言列表更改自己的应用程序语言？

1 个答案: