根據Uri獲取檔案的絕對路徑

public static 

string getrealpathfromuri(
context 
context
, uri 
contenturi) ,
//null
, null
, null
);if 
(cursor 
== null
) result 
= contenturi
.getpath();
else 
return 
result
;}

/**

* 根據的uri獲取的絕對路徑(適配多種api)** 
@return 
如果uri對應的存在, 那麼返回該的絕對路徑, 否則返回null
*/public static 
string getrealpathfromuri(
context 
context
, uri 
uri) 
/*** 適配api19以上,根據uri獲取的絕對路徑
*/@targetapi
(build.version_codes
.kitkat
)private static 
string getrealpathfromuri_aboveapi19(
context 
context
, uri 
uri) 
;string 
selection 
= mediastore.images.media
._id 
+ "=?"
;string
selectionargs = ;
cursor 
cursor 
= context
.getcontentresolver().query(
mediastore.images.media
.external_content_uri,//
projection
, selection
, selectionargs
, null
);int 
columnindex 
= cursor
.getcolumnindex(
projection[0
]);if 
(cursor
.movetofirst()) 
filepath 
= cursor
.getstring(
columnindex
);cursor
.close();
return 
filepath;}
/*** 適配api11-api18,根據uri獲取的絕對路徑
*/private static 
string getrealpathfromuri_api11to18(
context 
context
, uri 
uri) 
;cursorloader 
loader 
= new 
cursorloader
(context
, uri
, projection
, null
, null
, null
);cursor 
cursor 
= loader
.loadinbackground();
if (
cursor 
!= null
) return 
filepath;}
/*** 適配api11以下(不包括api11),根據uri獲取的絕對路徑
*/private static 
string getrealpathfromuri_belowapi11(
context 
context
, uri 
uri) 
;cursor 
cursor 
= context
.getcontentresolver().query(
uri, 
projection
, null
, null
, null
);if 
(cursor 
!= null
) return 
filepath
;}

null

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