Question

Can someone please help with this. I am generating a random number and based on this random number I want to pick a png file from my res/drawable-mdpi folder to display. This is the code I’m using:

    public void DisplayRandomPicture(int randomNumber) 
    {   
    String drawableName = "c"+ randomNumber;

    ImageView image= (ImageView)findViewById(R.id.imageView1);  
    image.setImageDrawable(getResources().getDrawable(getResources().getIdentifier(drawableName, "res/drawable-mdpi", getPackageName())));

    }

All the files in the res/drawable-mdpi folder start with “c”. There is something wrong with the image.setImageDrawable syntax. When I run my app it crashes.

Answer 1

public void DisplayRandomPicture(int randomNumber) 
    {   
    String drawableName = "c"+ randomNumber;

    ImageView iw= (ImageView)findViewById(R.id.imageView1);  
    resID = getResources().getIdentifier(drawableName, "drawable",  getPackageName());
    iw.setImageResource(resID);

    }

Try above and make sure the image exists with the exact name.