Question

I have a local sqlite database file that looks something like this…

_ID | Color_Name | Image_Name  
1   | Red        | red.png  
2   | Blue       | blue.png  
3   | Green      | green.png  
Etc.

The Image_Name column of the database contains ONLY the file name, NOT the image itself. All images are stored locally in the res/drawable-mdpi directory.

The goal is to have a list that displays the color name and the associated image for that color from the database. For example, the list would look something like this [the plus sign below represents an actual .png image]…

____________________________________________

Red (text only on this line)  
+ (actual red.png image on this line)  
____________________________________________

Blue (text only on this line)  
+ (actual blue.png image on this line)  
____________________________________________

Etc.  

I can get the color name to display, but I can’t figure out how to get the image itself to display. The relevant portion of code for displaying the name is below…

static class ColorHolder {
    private TextView name=null;

     ColorHolder(View row) {             
        name=(TextView)row.findViewById(R.id.colorName);

        }
           void populateFrom(Cursor c, ColortHelper r) {

               name.setText(r.getName(c)) ;
          }
}

The relevant portion of the xml file for BOTH the name & image is below…

<TextView 
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="bottom|left"
android:id="@+id/colorName"/>

<ImageView
 android:id="@+id/ImageView00"
 android:layout_width="fill_parent"
 android:layout_height="fill_parent"
 android:src="@drawable/image1" <!--[NOTE: THIS DEFAULT IMAGE FILE SHOULD BE REPLACED ON THE FLY W/THE CORRECT IMAGE FILE FOR EACH RECORD]-->
  >

None of the other questions I found were helpful in resolving this issue for me. Could someone please help me get this figured out? I would be happy for any help, but it would be especially helpful if you could use my ACTUAL file names / paths / variables / ID’s / etc. (which are given above) in your explanation so that I could most easily follow & understand your response. Pointing me to tutorials may not be helpful as I have already looked at a lot of material but didn’t get this resolved. Thanks!

Answer 1

Use Resources.getIdentifier(String name, String defType, String defPackage)

Also you don’t need to store the resource image name … just name them the same as the color (as you already have done), just make sure as I show here that they are lower case

To use your example:

void populateFrom(Cursor c, ColorHelper r) {

    //get the color name from your database (only once)

    String strColor = r.getName(c);

    // set the text on your TextView as before

    TextView clrName = (TextView)findViewById(R.id.ImageView00);
    clrName.setText(strColor);

    // get the resource ID - note "name" without extension

    int resourceID = context.getResources().getIdentifier(strColor.toLower(),
            "drawable", context.getPackageName());

    //get a reference to your imageview and set the image

    ImageView clrImage = (ImageView)findViewById(R.id.ImageView00);
    clrImage.setImageResource(resourceID);

}