Android 分享一个SharedPreferences的工具类,方便保存数据

[java] view
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package com.example.shortcut;

import android.content.Context;

import android.content.SharedPreferences;

/**

* 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 xiaanming

*

*/

public class SharedPreferencesUtils {

/**

* 保存在手机里面的文件名

*/

private static final String FILE_NAME = "share_date";

/**

* 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 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("String".equals(type)){

editor.putString(key, (String)object);

}

else if("Integer".equals(type)){

editor.putInt(key, (Integer)object);

}

else if("Boolean".equals(type)){

editor.putBoolean(key, (Boolean)object);

}

else if("Float".equals(type)){

editor.putFloat(key, (Float)object);

}

else if("Long".equals(type)){

editor.putLong(key, (Long)object);

}

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

* @param context

* @param key

* @param defaultObject

* @return

*/

public static Object getParam(Context context , String key, Object defaultObject){

String type = defaultObject.getClass().getSimpleName();

SharedPreferences sp = context.getSharedPreferences(FILE_NAME, Context.MODE_PRIVATE);

if("String".equals(type)){

return sp.getString(key, (String)defaultObject);

}

else if("Integer".equals(type)){

return sp.getInt(key, (Integer)defaultObject);

}

else if("Boolean".equals(type)){

return sp.getBoolean(key, (Boolean)defaultObject);

}

else if("Float".equals(type)){

return sp.getFloat(key, (Float)defaultObject);

}

else if("Long".equals(type)){

return sp.getLong(key, (Long)defaultObject);

}

return null;

}

}

使用也很简单，保存数据

[java] view
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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);

获取数据

[java] view
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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);