android 利用SharedPreferences 存储系统数据的高级运用(枚举)
package com.lyc;
import android.app.Activity;
import android.content.Context;
import android.content.SharedPreferences;
public class SystemAPP {
private final String PREFERENCE_NAMR = "systemdb.xml";//目标配置文件
private SharedPreferences mySharedPreferences;
private SharedPreferences.Editor editor;
public SystemAPP(Context context) {
mySharedPreferences = context.getSharedPreferences(PREFERENCE_NAMR, Activity.MODE_PRIVATE);
editor = mySharedPreferences.edit();
}
/**
* 根据枚举名称相对应添加或者更新新数据
* @param name 枚举名称
*/
public boolean createOrUpdataName(MySystemEnum name){
editor.putString(name.toString(),name.getValue());
if(editor.commit()){
return true;
}
return false;
}
/**
* 根据枚举名称添加或者 修改对于的数据值
* @param name 名称
* @param value 目标值
*/
public boolean createOrUpdataName(MySystemEnum name,MySystemEnum value){
editor.putString(name.toString(), value.getValue());
if(editor.commit()){
return true;
}
return false;
}
/**
* 根据枚举名称得到相对应的值
* @param name 枚举名称
* @return 数据值
*/
public String getValue(MySystemEnum name){
return mySharedPreferences.getString(name.getValue(), "没有数据.");
}
/**
* 情况配置文件所有内容
*/
public boolean deleteAll(){
editor.clear();
if(editor.commit()){
return true;
}
return false;
}
/**
* 根据枚举名称来删除该数据
* @param name 枚举名称
*/
public boolean deleteName(MySystemEnum name){
editor.remove(name.toString());
if(editor.commit()){
return true;
}
return false;
}
}
package com.lyc;
/*
* 系统配置文件枚举
*/
public enum MySystemEnum {
homepage("homepage"), //首页
newProduct("newProduct"), //新品
cookRecommend("cookRecommend"), //厨师推荐
foodLevel("foodLevel"), //菜单级别
news("news"), //公告栏
video("video"), //视频
food1("food"), //菜
foodName("foodName"),
foodValue1("foodType1"),
foodValue2("foodType2");
private String value;
MySystemEnum(String value){
this.value = value;
}
public String getValue() {
return value;
}
}
package com.lyc;
import android.app.Activity;
import android.os.Bundle;
import android.widget.TextView;
public class SystemDBActivity extends Activity {
/** Called when the activity is first created. */
private TextView textView;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
SystemAPP app = new SystemAPP(this);
app.createOrUpdataName(MySystemEnum.foodLevel);
textView = (TextView)findViewById(R.id.text_name);
textView.setText(app.getValue(MySystemEnum.foodLevel));
app.createOrUpdataName(MySystemEnum.foodLevel,MySystemEnum.foodName);
}
}