[android] 标题部分管理

package com.tsh.lottery.view.manager;

import com.tsh.lottery.R;

import android.app.Activity;
import android.view.View;
import android.widget.RelativeLayout;
/**
 * 标题管理
 * @author taoshihan
 *
 */
public class TitleManager {
    private RelativeLayout generalTitle,unloginTitle,loginTitle;
    private static TitleManager instance=new TitleManager();
    private TitleManager(){}
    public static TitleManager getInstance(){
        return instance;
    }
    /**
     * 初始化标题
     * @param activity
     */
    public void init(Activity activity){
        generalTitle=(RelativeLayout) activity.findViewById(R.id.title_general);
        loginTitle=(RelativeLayout) activity.findViewById(R.id.title_login);
        unloginTitle=(RelativeLayout) activity.findViewById(R.id.title_unlogin);
    }
    /**
     * 隐藏所有标题
     */
    public void hideTitle(){
        generalTitle.setVisibility(View.GONE);
        unloginTitle.setVisibility(View.GONE);
        loginTitle.setVisibility(View.GONE);
    }
    /**
     * 显示通用的标题
     */
    public void showGeneralTitle() {
        hideTitle();
        generalTitle.setVisibility(View.VISIBLE);
    }
    /**
     * 显示未登录的标题
     */
    public void showUnloginTitle() {
        hideTitle();
        unloginTitle.setVisibility(View.VISIBLE);
    }
    /**
     * 显示已经登陆的标题
     */
    public void showLoginTitle() {
        hideTitle();
        loginTitle.setVisibility(View.VISIBLE);
    }
}

    /**
     * 添加菜单
     */
    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        MenuInflater inflater=getMenuInflater();
        inflater.inflate(R.menu.menu, menu);
        return super.onCreateOptionsMenu(menu);
    }
    /**
     * 解决ActionBar的问题
     */
    public void setOverflowMenuQues(){
        ViewConfiguration viewConfiguration=ViewConfiguration.get(this);
        try {
            Field field=ViewConfiguration.class.getDeclaredField("sHasPermanentMenuKey");
            field.setAccessible(true);
            field.setBoolean(viewConfiguration, false);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android" >

    <item
        android:id="@+id/menu_search"
        android:actionViewClass="android.widget.SearchView"
        android:showAsAction="always"
        android:title="搜索"/>
    <item
        android:showAsAction="always"
        android:id="@+id/menu_user"
        android:title="用户"/>
    <item
        android:showAsAction="never"
        android:id="@+id/menu_cart"
        android:title="购物"/>
    <item
        android:showAsAction="always"
        android:id="@+id/menu_edit"
        android:title="编辑"/>
    <item
        android:showAsAction="never"
        android:id="@+id/menu_setting"
        android:title="设置"/>

</menu>