Android: displaying image to ImageView using String as name of the image(in real device)

Question

I cant load an image from @drawable to ImageView using String as name of the image.

Here's my code;

String uri = "@drawable/"+imgname;  // image file
            int resID = getResources().getIdentifier(uri , "drawable", getPackageName());
            Drawable drawable = getResources().getDrawable(resID); //<----line with error
            ImageView imageview= (ImageView)findViewById(R.id.hardImg);
            imageview.setImageDrawable(drawable);

error log:

android.content.res.Resources$NotFoundException: Resource ID #0x0

Remove "@drawable/". You just need the resource name, which is the filename, without the extension. — Mike M.
– Mike M., Commented Mar 11, 2017 at 4:35
yes. string names are from ext db and I already checked all case if it is case sensitive. — Jay
– Jay, Commented Mar 11, 2017 at 4:57

OneCricketeer · Accepted Answer · 2017-03-11 05:06:18Z

3

You don't need "@drawable/". That is what the second parameter to getIdentifier already does.

getResources().getIdentifier(imgname, "drawable", getPackageName());

Will generate the integer resource ID for <your package name>.R.drawable.<imgname>, or 0 if that resource does not exist.

Returns 0 if no such resource was found. (0 is not a valid resource ID.)

Thus, your error message.

Note : Android resources can only contain certain characters.

edited Mar 11, 2017 at 5:06

answered Mar 11, 2017 at 4:59

OneCricketeer

193k20 gold badges147 silver badges277 bronze badges

Sign up to request clarification or add additional context in comments.

7 Comments

Jay Over a year ago

okay. so, I made this String uri = imgname; int resID = getResources().getIdentifier(uri , "drawable", getPackageName()); but still having error.

Jay Over a year ago

java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.hamira.wordmatchinggame/com.example.hamira.wordmatchinggame.ingamehard}: android.content.res.Resources$NotFoundException: Resource ID #0x0

OneCricketeer Over a year ago

Yes. Read the quote from the docs I provided. I have no idea what imgname is being set to, but obviously that name doesn't exist in your application's res/drawable folder

Jay Over a year ago

I tried to give a direct name like imgname = "ac.png". ac.png is clearly exist in res/drawable but I still have the same error again :-(

Jay Over a year ago

I tried something else and it showed up! I dont understand.

|

Paresh · Accepted Answer · 2017-03-11 04:46:13Z

0

This should work -

String uri = "@drawable/"+imgname;  // image file with extension, make sure image name is correct.
int resID = getResources().getIdentifier(uri , null, getPackageName());
Drawable drawable = getResources().getDrawable(resID); 
ImageView imageview= (ImageView)findViewById(R.id.hardImg);
imageview.setImageDrawable(drawable);

answered Mar 11, 2017 at 4:46

Paresh

6,8871 gold badge18 silver badges27 bronze badges

5 Comments

Jay Over a year ago

you mean something like this one? String uri = "@drawable/"+imgname+".png";

OneCricketeer Over a year ago

@Jay No. Given the file your_image.png and you want R.drawable.your_image. Android doesn't really care you have a png, so @drawable/your_image is the resource

Jay Over a year ago

@cricket_007 I must not. imgname holds different image names on button click.. It change the image base on this string name. names are stored in external db.

OneCricketeer Over a year ago

@Jay You misunderstand my comment. "@drawable/"+imgname+".png" is not correct. That was all i said.

Jay Over a year ago

@cricket_007 my bad.

Collectives™ on Stack Overflow

Android: displaying image to ImageView using String as name of the image(in real device)

2 Answers 2

7 Comments

5 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

7 Comments

5 Comments

Your Answer

Sign up or log in

Post as a guest

Related