从URI获取真实路径，Android KitKat新存储访问框架

发布于12月06日

在Android 4.4年(KitKat)的新 gallery 访问之前，我通过以下方法在SD卡上获得了我的真实路径:

public String getPath(Uri uri) {
   String[] projection = { MediaStore.Images.Media.DATA };
   Cursor cursor = managedQuery(uri, projection, null, null, null);
   startManagingCursor(cursor);
   int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
   cursor.moveToFirst();
 return cursor.getString(column_index);
}

现在是意图.操作获取内容返回不同的数据:

之前:

content://media/external/images/media/62

现在:

content://com.android.providers.media.documents/document/image:62

我如何才能获得SD卡上的真实路径？

推荐答案

Note: This answer addresses part of the problem. For a complete solution (in the form of a library), look at 100.

您可以使用URI获取document id，然后查询MediaStore.Images.Media.EXTERNAL_CONTENT_URI或MediaStore.Images.Media.INTERNAL_CONTENT_URI(取决于SD卡的情况).

要获取文档id:

// Will return "image:x*"
String wholeID = DocumentsContract.getDocumentId(uriThatYouCurrentlyHave);

// Split at colon, use second item in the array
String id = wholeID.split(":")[1];

String[] column = { MediaStore.Images.Media.DATA };     

// where id is equal to             
String sel = MediaStore.Images.Media._ID + "=?";

Cursor cursor = getContentResolver().
                          query(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, 
                          column, sel, new String[]{ id }, null);

String filePath = "";

int columnIndex = cursor.getColumnIndex(column[0]);

if (cursor.moveToFirst()) {
    filePath = cursor.getString(columnIndex);
}   

cursor.close();

参考:我找不到这个解决方案的来源.我想请原始海报在这里投稿.今晚我会再看看.