Shared Preferences 整理

相信Shared Preferences对所有开发者都不陌生了，接下来给大家分享一下我对它的理解和封装

import android.content.Context;

import android.content.SharedPreferences;

import android.content.SharedPreferences.Editor;

import android.preference.PreferenceManager;

/**

* @author zlang

*

*/

public final class AppPresences {

private static AppPresences instance;

public static boolean isSoundOpen = true;

public static boolean isShakeOpen = true;

public static boolean isDownOpen = true;

private SharedPreferences mSharedPreferences;

private Editor mEditor ;

private AppPresences(Context context){

mSharedPreferences = PreferenceManager.getDefaultSharedPreferences(context);

mEditor = mSharedPreferences.edit();

}

private synchronized static void syncInit(Context context){

if(instance == null){

instance = new AppPresences(context);

}

}

public static AppPresences init(Context context){

if(instance == null){

syncInit(context);

}

return instance;

}

public static AppPresences getInstance(){

return instance;

}

private boolean checkPutInput(String key){

if(key == null || key.equals("")){

return false ;

}

if(mEditor == null){

return false ;

}

return true ;

}

public void putString(String key,String value){

if(!checkPutInput(key) || value == null) return ;

mEditor.putString(key, value).commit() ;

}

public void putInt(String key,int value){

if(!checkPutInput(key)) return ;

mEditor.putInt(key, value).commit() ;

}

public void putLong(String key,long value){

if(!checkPutInput(key)) return ;

mEditor.putLong(key, value).commit() ;

}

public void putBoolean(String key,boolean value){

if(!checkPutInput(key)) return ;

mEditor.putBoolean(key, value).commit() ;

}

public void putFloat(String key,float value){

if(!checkPutInput(key)) return ;

mEditor.putFloat(key, value).commit() ;

}

private boolean checkGetInput(String key){

if(key == null || key.equals("")){

return false ;

}

if(mSharedPreferences == null){

return false ;

}

return true ;

}

public String getString(String key){

if(!checkGetInput(key)) return null ;

return mSharedPreferences.getString(key, "");

}

public int getInt(String key){

if(!checkGetInput(key)) return -1 ;

return mSharedPreferences.getInt(key, -1);

}

public long getLong(String key){

if(!checkGetInput(key)) return -1 ;

return mSharedPreferences.getLong(key, -1) ;

}

public float getFloat(String key){

if(!checkGetInput(key)) return -1 ;

return mSharedPreferences.getFloat(key, 0.0f) ;

}

public boolean getBoolean(String key){

if(!checkGetInput(key)) return false ;

return mSharedPreferences.getBoolean(key, false) ;

}

public boolean getBoolean(String key,boolean defaultValue){

if(!checkGetInput(key)) return false ;

return mSharedPreferences.getBoolean(key, defaultValue) ;

}

public void clear(){

mSharedPreferences = null ;

mEditor = null ;

instance    = null ;

}

}

当然你在用之前你必须初始化它

AppPresences.init(this);

用起来就更方便了，

//获取

//AppPresences.getInstance().getString(EConfig.USER_ID))

//AppPresences.getInstance().getInt(EConfig.USER_ID))

AppPresences.getInstance().getLong(EConfig.USER_ID))

//设置  既put

//AppPresences.getInstance().putString("Dirain",EConfig.USER_ID))

//AppPresences.getInstance().putInt(100,EConfig.USER_ID))

AppPresences.getInstance().putLong(121212121,EConfig.USER_ID))

当然，还有boolean什么的，你多用用就可以了。希望这文章对你们有帮助，苦逼的我敲代码去了。