SharedPreferences工具类，,import java.

SharedPreferences工具类，,import java.

import java.util.Map;import java.util.Set;import android.content.Context;import android.content.SharedPreferences;import android.content.SharedPreferences.Editor;/** * SharedPreferences工具类 * @author zouyb * */public class SharedPreferencesUtil {    private SharedPreferences sp;    private Editor editor;    private String name = "mosjoy_chat";    private int mode = Context.MODE_PRIVATE;    public SharedPreferencesUtil(Context context) {        this.sp = context.getSharedPreferences(name, mode);        this.editor = sp.edit();    }    /**     * 创建一个工具类，默认打开名字为name的SharedPreferences实例     * @param context     * @param name   唯一标识     * @param mode   权限标识     */    public SharedPreferencesUtil(Context context, String name, int mode) {        this.sp = context.getSharedPreferences(name, mode);        this.editor = sp.edit();    }    /**     * 添加信息到SharedPreferences     *     * @param name     * @param map     * @throws Exception     */    public void add(Map<String, String> map) {        Set<String> set = map.keySet();        for (String key : set) {            editor.putString(key, map.get(key));        }        editor.commit();    }    /**     * 删除信息     *     * @throws Exception     */    public void deleteAll() throws Exception {        editor.clear();        editor.commit();    }    /**     * 删除一条信息     */    public void delete(String key){        editor.remove(key);        editor.commit();    }    /**     * 获取信息     *     * @param key     * @return     * @throws Exception     */    public String get(String key){        if (sp != null) {            return sp.getString(key, "");        }        return "";    }    /**     * 获取此SharedPreferences的Editor实例     * @return     */    public Editor getEditor() {        return editor;    }}