存
首先初始化
private SP sp; sp = new SP( context );
存入数据
第一个参数为上下文，第二个参数为key,第三个参数为要存入的数据Value
sp.PutData( context,"AccessToken",AccessToken );
取
初始化
private SP sp; sp = new SP( context );
取出数据
第一个参数为上下文，第二个参数为存入数据时定义的名称，第三个数据为取出数据的默认类型（这个参数很关键，再封装类转换类型时尤为重要）
AccessToken = (String) sp.GetData( context,"AccessToken","" );
封装类
public class SP { private static SP spInstant; private String defaultModelName; public SP(){ } public SP (Context context){ if (spInstant == null){ spInstant = new SP( ); spInstant.defaultModelName = context.getResources().getString( R.string.DefaultModelName ); } } public void PutData(Context context,String key,Object value){ PutData( context,defaultModelName,key,value ); } private void PutData(Context context,String defaultModelName ,String key,Object value){ SharedPreferences preferences = context.getSharedPreferences( defaultModelName,Context.MODE_PRIVATE ); SharedPreferences.Editor editor = preferences.edit(); if (value instanceof Boolean){ editor.putBoolean( key,(Boolean) value ); }else if (value instanceof Integer){ editor.putInt( key,(Integer)value ); }else if (value instanceof Float){ editor.putFloat( key,(Float)value ); }else if (value instanceof Long){ editor.putLong( key,(Long)value ); }else if (value instanceof String){ editor.putString( key,(String)value ); }else{ return; } editor.apply(); } public Object GetData(Context context,String key,Object defaultValue){ return GetData( context,defaultModelName,key,defaultValue); } private Object GetData(Context context,String defaultModelName,String key,Object defaultValue){ SharedPreferences preferences = context.getSharedPreferences( defaultModelName,Context.MODE_PRIVATE ); if (defaultValue instanceof Boolean){ return preferences.getBoolean( key,(Boolean) defaultValue ); }else if (defaultValue instanceof Integer){ return preferences.getInt( key,(Integer) defaultValue ); }else if (defaultValue instanceof Float){ return preferences.getFloat( key,(Float) defaultValue ); }else if (defaultValue instanceof Long){ return preferences.getLong( key,(Long) defaultValue ); }else if (defaultValue instanceof String){ return preferences.getString( key,(String) defaultValue ); }else{ return null; } } }
