Android 简单存储 SharedPreferencesUtils

/**
* SharedPreferences的一个工具类，调用setParam就能保存String, Integer, Boolean, Float,
* Long类型的参数 同样调用getParam就能获取到保存在手机里面的数据
*
* @author 带头大哥
*
*/
public class SharedPreferencesUtils {
/**
* <pre>
* 所有要存储的key都在这定义方便管理
* 注意标注类型
* </pre>
*/
public static final String KEY_NAME = "";
/**
* 保存在手机里面的文件名
*/
private static final String FILE_NAME = "MyData";

/**
* 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
*
* SharedPreferencesUtils.setParam(this, "String", "xiaanming");
* SharedPreferencesUtils.setParam(this, "int", 10);
* SharedPreferencesUtils.setParam(this, "boolean", true);
* SharedPreferencesUtils.setParam(this, "long", 100L);
* SharedPreferencesUtils.setParam(this, "float", 1.1f);
*
* @param context
* @param key
* @param object
*/
public static void setParam(Context context, String key, Object object) {
// String type = object.getClass().getSimpleName();
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());
}
editor.commit();
}

/**
* 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
*
* SharedPreferencesUtils.getParam(TimerActivity.this, "String", "");
* SharedPreferencesUtils.getParam(TimerActivity.this, "int", 0);
* SharedPreferencesUtils.getParam(TimerActivity.this, "boolean", false);
* SharedPreferencesUtils.getParam(TimerActivity.this, "long", 0L);
* SharedPreferencesUtils.getParam(TimerActivity.this, "float", 0.0f);
*
* @param context
* @param key
* @param defaultObject
* @return
*/
public static Object getParam(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);
}

/**
* 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();

/**
* 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();
}
}
}