当我有一个列的记录中的信息时，如何访问android sqlite数据库的其他列

Question

I have an activity where it shows an image from the phone`s sd card, and I have the path of the image that was passed from another activity to the current activity as an intent extra, example: //mnt/sdcard/DCIM/pic05.png

the path is stored in the database under the column named _data and there are other columns for each record that are there, like description and _display_name, how do I access these?

for example I have the path like the one shown above, pic05.png and I want to show the _display_name in a textview for that pic, that is what I am trying to find out how to do.

Answer 1

Simple SQL would do, based on a table:

CREATE TABLE pictures
( fileName TEXT NOT NULL,
  displayName TEXT,
  PRIMARY KEY pictures_pk( fileName ) );

You could simply:

SELECT displayName
  FROM pictures
 WHERE fileName = ?

Or in Java:

SQLiteDatabase db...
String displayName;
Cursor c = db.query( "pictures", null, "fileName=pic01.png", null, null, null, null );
c.moveToFirst();
if( !c.isAfterLast() )
    displayName = c.getString(1);

This is very simplified. You'll need to pass the columns you want and use proper column-index when you access the cursor.