SharedPreferencesUtil.java
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package com.sunvote.xpadapp.utils;
import android.content.Context;
import android.content.SharedPreferences;
import android.content.SharedPreferences.Editor;
import com.google.gson.Gson;
import com.google.gson.reflect.TypeToken;
import java.util.ArrayList;
import java.util.List;
public class SharedPreferencesUtil {
//存储的sharedpreferences文件名
private static final String FILE_NAME = "save_file_name";
/**
* 保存数据到文件
* @param context
* @param key
* @param data
*/
public static void saveData(Context context, String key,Object data){
String type = data.getClass().getSimpleName();
SharedPreferences sharedPreferences = context
.getSharedPreferences(FILE_NAME, Context.MODE_PRIVATE);
Editor editor = sharedPreferences.edit();
if ("Integer".equals(type)){
editor.putInt(key, (Integer)data);
}else if ("Boolean".equals(type)){
editor.putBoolean(key, (Boolean)data);
}else if ("String".equals(type)){
editor.putString(key, (String)data);
}else if ("Float".equals(type)){
editor.putFloat(key, (Float)data);
}else if ("Long".equals(type)){
editor.putLong(key, (Long)data);
}
editor.commit();
}
/**
* 从文件中读取数据
* @param context
* @param key
* @param defValue
* @return
*/
public static Object getData(Context context, String key, Object defValue){
String type = defValue.getClass().getSimpleName();
SharedPreferences sharedPreferences = context.getSharedPreferences
(FILE_NAME, Context.MODE_PRIVATE);
//defValue为为默认值，如果当前获取不到数据就返回它
if ("Integer".equals(type)){
return sharedPreferences.getInt(key, (Integer)defValue);
}else if ("Boolean".equals(type)){
return sharedPreferences.getBoolean(key, (Boolean)defValue);
}else if ("String".equals(type)){
return sharedPreferences.getString(key, (String)defValue);
}else if ("Float".equals(type)){
return sharedPreferences.getFloat(key, (Float)defValue);
}else if ("Long".equals(type)){
return sharedPreferences.getLong(key, (Long)defValue);
}
return null;
}
/**
* 保存List
* @param tag
* @param datalist
*/
public static <T> void setDataList(Context context, String tag, List<T> datalist) {
if (null == datalist || datalist.size() <= 0)
return;
SharedPreferences sharedPreferences = context
.getSharedPreferences(FILE_NAME, Context.MODE_PRIVATE);
Editor editor = sharedPreferences.edit();
Gson gson = new Gson();
//转换成json数据，再保存
String strJson = gson.toJson(datalist);
editor.putString(tag, strJson);
editor.commit();
}
public static void setArrayString(Context context,String tag, String[] values) {
String regularEx = "~";
String str = "";
SharedPreferences preferences = context.getSharedPreferences
(FILE_NAME, Context.MODE_PRIVATE);
if (values != null && values.length > 0) {
for (String value : values) {
str += value;
str += regularEx;
}
Editor et = preferences.edit();
et.putString(tag, str);
et.commit();
}
}
/**
* 获取List
* @param tag
* @return
*/
public static <T> List<T> getDataList(Context context,String tag) {
List<T> datalist=new ArrayList<T>();
SharedPreferences preferences = context.getSharedPreferences
(FILE_NAME, Context.MODE_PRIVATE);
String strJson = preferences.getString(tag, null);
if (null == strJson) {
return datalist;
}
Gson gson = new Gson();
datalist = gson.fromJson(strJson, new TypeToken<List<T>>() {
}.getType());
return datalist;
}
public static String[] getArrayString(Context context,String tag) {
String regularEx = "~";
String[] str = null;
SharedPreferences preferences = context.getSharedPreferences
(FILE_NAME, Context.MODE_PRIVATE);
String values;
values = preferences.getString(tag, null);
if(values!=null){
str = values.split(regularEx);
}
return str;
}
}