android Uri获取真实路径转换成File的方法

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Uri uri = data.getData();String[] proj = { MediaStore.Images.Media.DATA };Cursor actualimagecursor = managedQuery(uri,proj,null,null,null);int actual_image_column_index = actualimagecursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);actualimagecursor.moveToFirst();String img_path = actualimagecursor.getString(actual_image_column_index);File file = new File(img_path);

以下是4.2.2之后，managedQuery方法被废弃后的解决方案：

public String getRealPathFromURI(Uri contentUri) {    String res = null;    String[] proj = { MediaStore.Images.Media.DATA };    Cursor cursor = getContentResolver().query(contentUri, proj, null, null, null);    if(cursor.moveToFirst()){;       int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);       res = cursor.getString(column_index);    }    cursor.close();    return res;}

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