package com.xdsjs.save.utils; |
import android.content.Context; |
import android.content.SharedPreferences; |
import java.lang.reflect.InvocationTargetException; |
import java.lang.reflect.Method; |
import java.util.Map; |
/** |
* 缓存工具类 |
* Created by xdsjs on 2015/10/13. |
*/ |
public class SPUtils { |
/** |
* 保存在手机里面的文件名 |
*/ |
public static final String FILE_NAME = "share_data"; |
/** |
* 保存数据的方法,我们需要拿到保存数据的具体类型,然后根据类型调用不同的保存方法 |
* |
* @param context |
* @param key |
* @param object |
*/ |
public static void put(Context context, String key, Object object) |
{ |
SharedPreferences sp = context.getSharedPreferences(FILE_NAME, |
Context.MODE_PRIVATE); |
SharedPreferences.Editor editor = sp.edit(); |
if (object instanceof String) |
{ |
editor.putString(key, (String) object); |
} else if (object instanceof Integer) |
{ |
editor.putInt(key, (Integer) object); |
} else if (object instanceof Boolean) |
{ |
editor.putBoolean(key, (Boolean) object); |
} else if (object instanceof Float) |
{ |
editor.putFloat(key, (Float) object); |
} else if (object instanceof Long) |
{ |
editor.putLong(key, (Long) object); |
} else |
{ |
editor.putString(key, object.toString()); |
} |
SharedPreferencesCompat.apply(editor); |
} |
/** |
* 得到保存数据的方法,我们根据默认值得到保存的数据的具体类型,然后调用相对于的方法获取值 |
* |
* @param context |
* @param key |
* @param defaultObject |
* @return |
*/ |
public static Object get(Context context, String key, Object defaultObject) |
{ |
SharedPreferences sp = context.getSharedPreferences(FILE_NAME, |
Context.MODE_PRIVATE); |
if (defaultObject instanceof String) |
{ |
return sp.getString(key, (String) defaultObject); |
} else if (defaultObject instanceof Integer) |
{ |
return sp.getInt(key, (Integer) defaultObject); |
} else if (defaultObject instanceof Boolean) |
{ |
return sp.getBoolean(key, (Boolean) defaultObject); |
} else if (defaultObject instanceof Float) |
{ |
return sp.getFloat(key, (Float) defaultObject); |
} else if (defaultObject instanceof Long) |
{ |
return sp.getLong(key, (Long) defaultObject); |
} |
return null; |
} |
/** |
* 移除某个key值已经对应的值 |
* @param context |
* @param key |
*/ |
public static void remove(Context context, String key) |
{ |
SharedPreferences sp = context.getSharedPreferences(FILE_NAME, |
Context.MODE_PRIVATE); |
SharedPreferences.Editor editor = sp.edit(); |
editor.remove(key); |
SharedPreferencesCompat.apply(editor); |
} |
/** |
* 清除所有数据 |
* @param context |
*/ |
public static void clear(Context context) |
{ |
SharedPreferences sp = context.getSharedPreferences(FILE_NAME, |
Context.MODE_PRIVATE); |
SharedPreferences.Editor editor = sp.edit(); |
editor.clear(); |
SharedPreferencesCompat.apply(editor); |
} |
/** |
* 查询某个key是否已经存在 |
* @param context |
* @param key |
* @return |
*/ |
public static boolean contains(Context context, String key) |
{ |
SharedPreferences sp = context.getSharedPreferences(FILE_NAME, |
Context.MODE_PRIVATE); |
return sp.contains(key); |
} |
/** |
* 返回所有的键值对 |
* |
* @param context |
* @return |
*/ |
public static Map<String, ?> getAll(Context context) |
{ |
SharedPreferences sp = context.getSharedPreferences(FILE_NAME, |
Context.MODE_PRIVATE); |
return sp.getAll(); |
} |
/** |
* 创建一个解决SharedPreferencesCompat.apply方法的一个兼容类 |
* |
* @author zhy |
* |
*/ |
private static class SharedPreferencesCompat |
{ |
private static final Method sApplyMethod = findApplyMethod(); |
/** |
* 反射查找apply的方法 |
* |
* @return |
*/ |
@SuppressWarnings({ "unchecked", "rawtypes" }) |
private static Method findApplyMethod() |
{ |
try |
{ |
Class clz = SharedPreferences.Editor.class; |
return clz.getMethod("apply"); |
} catch (NoSuchMethodException e) |
{ |
} |
return null; |
} |
/** |
* 如果找到则使用apply执行,否则使用commit |
* |
* @param editor |
*/ |
public static void apply(SharedPreferences.Editor editor) |
{ |
try |
{ |
if (sApplyMethod != null) |
{ |
sApplyMethod.invoke(editor); |
return; |
} |
} catch (IllegalArgumentException e) |
{ |
} catch (IllegalAccessException e) |
{ |
} catch (InvocationTargetException e) |
{ |
} |
editor.commit(); |
} |
} |