Set Image Dynamically In A Listview By Retrieving Image Name From A Data Source In Android

What is the best way to retrieve images from drawable folder while the name of those images are stored in a DB and show them in a listView ? Suppose i have three pictures in drawab

Solution 1:

You can get an image from the drawable folder with a dynamic name this way:

resources.getIdentifier(String imageName, String folder, String package);

This returns an integer the same way you would type

R.drawable.imageName;

An example of how to use it:

Bitmap bitmap[] = new Bitmap[5];

for (int i = 0; i < 5; i++)
    bitmap[i] = BitmapFactory.decodeResource(
        resources, 
        resources.getIdentifier("pic" +i, "drawable", "com.example.com")));

This gets images from "pic0.png", "pic1.png" ... until "pic4.png", of course you can customize it the way you want

Solution 2:

int[] resID = newint[2]
String[] mDrawableName=newString[2];
mDrawableName[0] = "pic1";
mDrawableName[1] = "image";
mDrawableName[2] = "another_image";

for(i=0:i<=2:i++)
int resID[i] = getResources().getIdentifier(mDrawableName[i] , "drawable", getPackageName());

Usage

image.setImageResource(resID[0]);

Solution 3:

Ok the problem was that i was assigning my Adapter Layout Parameter wrong. Instead of ListView_Row i was pointing to ListView itself

So:

 SimpleCursorAdapter cursorAdapter = new SimpleCursorAdapter(this, R.layout.custom_listview, cursor, from, to, 0);

Would be:

SimpleCursorAdapter cursorAdapter = new SimpleCursorAdapter(this, R.layout.custom_listview_row, cursor, from, to, 0);