/**

* 通过Uri返回File文件

* 注意：通过相机的是类似content://media/external/images/media/97596

* 通过相册选择的：file:///storage/sdcard0/DCIM/Camera/IMG_20150423_161955.jpg

* 通过查询获取实际的地址

* @param uri

* @return

*/

public File getFileByUri(Uri uri) {

String path = null;

if ("file".equals(uri.getScheme())) {

path = uri.getEncodedPath();

if (path != null) {

path = Uri.decode(path);

ContentResolver cr = activity.getContentResolver();

StringBuffer buff = new StringBuffer();

buff.append("(").append(Images.ImageColumns.DATA).append("=").append("'" + path + "'").append(")");

Cursor cur = cr.query(Images.Media.EXTERNAL_CONTENT_URI, new String[] { Images.ImageColumns._ID, Images.ImageColumns.DATA }, buff.toString(), null, null);

int index = 0;

int dataIdx = 0;

for (cur.moveToFirst(); !cur.isAfterLast(); cur.moveToNext()) {

index = cur.getColumnIndex(Images.ImageColumns._ID);

index = cur.getInt(index);

dataIdx = cur.getColumnIndex(Images.ImageColumns.DATA);

path = cur.getString(dataIdx);

}

cur.close();

if (index == 0) {

} else {

Uri u = Uri.parse("content://media/external/images/media/" + index);

System.out.println("temp uri is :" + u);

}

}

if (path != null) {

return new File(path);

}

} else if ("content".equals(uri.getScheme())) {

// 4.2.2以后

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

Cursor cursor = activity.getContentResolver().query(uri, proj, null, null, null);

if (cursor.moveToFirst()) {

int columnIndex = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);

path = cursor.getString(columnIndex);

}

cursor.close();

return new File(path);

} else {

Log.i(TAG, "Uri Scheme:" + uri.getScheme());

}

return null;

}