Setting Android images from string value

Question

Currently I'm drawing a PNG image in my Android application like so:

ImageView image = new ImageView(context);
image.setImageDrawable(context.getResources().getDrawable(R.drawable.testimage))

If I have a list of image names in a database, is there a way to set the drawable above using the image name? I already have the code to go through the database, I'm just looking to draw the image based on the value taken from here.

For example, a record for the DB:

ID:    Name:    ImageName:
-      Test     testimage

So when I'm reading this record, I have a string with the value of "testimage" and I'd then want to set the image drawable to R.drawable.testimage.

One way I was thinking of doing it would be something like this:

int image = R.drawable.blank; // blank image

// testimage.png is the image name from the database
if(imageName.toString().equals("testimage.png"))
    image = R.drawable.testimage;
else if(imageName.toString().equals("another.png"))
    image = R.drawable.another;
else if(imageName.toString().equals("etc.png"))
    image = R.drawable.etc;

However this isn't very efficient!

Thanks

GeekYouUp · Accepted Answer · 2010-11-30 11:10:13Z

26

There is a method for doing that, you can retreive resource IDs by string using Resources.getIdentifier() http://developer.android.com/reference/android/content/res/Resources.html

Something like:

int resourceId = Activity.getResources().getIdentifier("testimage", "drawable", "your.package.name");

answered Nov 30, 2010 at 11:10

GeekYouUp

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Erik S · Accepted Answer · 2010-11-30 11:15:57Z

23

I'm using:

int resId = getResources().getIdentifier("testimage", "drawable", getPackageName());
image.setImageResource(resId);

"testimage" - corresponds to for instance testimage.jpg, i.e. dont include ".jpg"

"drawable" - is the resource type, like in: @drawable/testimage

Check Resources.getIdentifier(...)

answered Nov 30, 2010 at 11:15

Erik S

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2 Comments

dinesh707 Over a year ago

int resId = getResources().getIdentifier("testimage", "drawable", mainActivity.getPackageName()); Bitmap image = BitmapFactory.decodeResource(getResources(), resId);

LargeGlasses Over a year ago

Boo yeah! This was perfect.

Mikpa · Accepted Answer · 2010-11-30 11:18:29Z

0

Put you images in the assets/ folder and open

image.setImageURI("file:///android_asset/" + nameFromDB);

answered Nov 30, 2010 at 11:18

Mikpa

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Mudasar · Accepted Answer · 2016-08-02 18:19:51Z

-2

String path = "sdcard/camera_app/name.jpg"; img.setImageDrawable(Drawable.createFromPath(path));

answered Aug 2, 2016 at 18:19

Mudasar

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2 Comments

JF Meier Over a year ago

Without any explanation, this is not helpful.

Mudasar Over a year ago

You can use path for different images example String path = "sdcard/camera_app/image1.jpg"; or String path = "sdcard/camera_app/image2.jpg" this can be use in if else condtion to draw a image only you want.

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