CODEWITHSUNDEEP
androiddynamicbitmap
Srht
Srht

Reputation: 473

Dynamically handling image resource

I want to change the image resource for bitmap dynamically. But I can't call them with name from the drawable class.

bmp = BitmapFactory.decodeResource(getResources(), R.drawable.getImage(foldername + "/" + imagename));

I need to do something like that but I couldn't find the proper way of doing this.,

EDITED

I think I should be more clear. I store my images under the drawable folder and they are separeted into other folders.

For example;

drawable/imageset1, drawable/imageset2,

and I want to change the Image resource for bitmap depending on user input.

For example: User selects imageset5 from first spinner, and selects image5.png from another spinner.

Upvotes: 0

Views: 1563

Answers (5)

Chintan Raghwani
Chintan Raghwani

Reputation: 3370

Just try following: Your image having name "imagename" must be in the folder

String IMAGE_FOLDER_NAME = "YOUR_IMAGE_CONTAINING_FOLDER";

Now, use following code:

String imagename = "YOUR_IMAGE_NAME";    
String PACKAGE_NAME=getApplicationContext().getPackageName();    
int imgId = getResources().getIdentifier(PACKAGE_NAME+":"+IMAGE_FOLDER_NAME+"/"+imagename , null, null);
System.out.println("IMG ID :: "+imgId);    //    check this in log
System.out.println("PACKAGE_NAME :: "+PACKAGE_NAME);    //    check this in log
Bitmap bitmap = BitmapFactory.decodeResource(getResources(),imgId);

Upvotes: 0

Umar Qureshi
Umar Qureshi

Reputation: 6115

I hope this will do what you want

BitmapFactory.decodeResource(getResources(), getResources().getIdentifier(foldername + "/" + imagename , "drawable", getPackageName());

EDITED:

while the above code will work only if you follow android rule which doesn't allow sub directories in drawable folder so the above code will work only when directly accessing images from drawable.

BitmapFactory.decodeResource(getResources(), getResources().getIdentifier( imagename , "drawable", getPackageName());

As these links describe

How to access res/drawable/"folder"

Can the Android drawable directory contain subdirectories?

Upvotes: 2

Soumyadip Das
Soumyadip Das

Reputation: 1791

you can't do like this. You have to add all images in drawable & use it like

myImage.setBackgroundResource(R.drawable.imageName)

or after downloading the image from web you can apply as

myImage.setBitmap(BitmapFactory.decodeStream(in));

to get the bitmap where in is InputStream

Upvotes: 0

Soham
Soham

Reputation: 4960

Is it a resource stored in the drawables folder? Then try this method from BitmapFactory

public static Bitmap decodeResource (Resources res, int id)

Where 

res = getResources()

and id is the id of the drawable like 

R.drawable.picture

Check it out here

Upvotes: 0

MAC
MAC

Reputation: 15847

Make one array of image resources 

int []a = int[]
{
   R.drawable.one,
   R.drawable.two,
   R.drawable.three,
   R.drawable.four,
};

Then access it in loop

for(int i=0;i<a.length;i++)
{
   //  a[i]
}

Upvotes: 0

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