sharedprerence数据保存
其他
2018-10-10 22:42:32
阅读次数: 0
| package com.xdsjs.save.utils; |
| import android.content.Context; |
| import android.content.SharedPreferences; |
| import java.lang.reflect.InvocationTargetException; |
| import java.lang.reflect.Method; |
| * Created by xdsjs on 2015/10/13. |
| 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 |
| public static void put(Context context, String key, Object object) |
| SharedPreferences sp = context.getSharedPreferences(FILE_NAME, |
| 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); |
| 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 |
| public static Object get(Context context, String key, Object defaultObject) |
| SharedPreferences sp = context.getSharedPreferences(FILE_NAME, |
| 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); |
| public static void remove(Context context, String key) |
| SharedPreferences sp = context.getSharedPreferences(FILE_NAME, |
| SharedPreferences.Editor editor = sp.edit(); |
| SharedPreferencesCompat.apply(editor); |
| public static void clear(Context context) |
| SharedPreferences sp = context.getSharedPreferences(FILE_NAME, |
| SharedPreferences.Editor editor = sp.edit(); |
| SharedPreferencesCompat.apply(editor); |
| public static boolean contains(Context context, String key) |
| SharedPreferences sp = context.getSharedPreferences(FILE_NAME, |
| public static Map<String, ?> getAll(Context context) |
| SharedPreferences sp = context.getSharedPreferences(FILE_NAME, |
| * 创建一个解决SharedPreferencesCompat.apply方法的一个兼容类 |
| private static class SharedPreferencesCompat |
| private static final Method sApplyMethod = findApplyMethod(); |
| @SuppressWarnings({ "unchecked", "rawtypes" }) |
| private static Method findApplyMethod() |
| Class clz = SharedPreferences.Editor.class; |
| return clz.getMethod("apply"); |
| } catch (NoSuchMethodException e) |
| * 如果找到则使用apply执行，否则使用commit |
| public static void apply(SharedPreferences.Editor editor) |
| if (sApplyMethod != null) |
| sApplyMethod.invoke(editor); |
| } catch (IllegalArgumentException e) |
| } catch (IllegalAccessException e) |
| } catch (InvocationTargetException e) |
}
转载自blog.csdn.net/Zyy_921/article/details/79413370