/**
- SharedPreferences常用于保存一些简单的数据,
- 如记录用户操作的配置等,使用简单、
*/
package com.lyt.demo04_wakeuptimer;
import android.content.Context;
import android.content.SharedPreferences;
import android.content.SharedPreferences.Editor;
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 data
* @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;
}
}