How to Retrieve Android Resources by Name Using `getIdentifier()`?

Resource Retrieval by Name

Accessing resources such as Strings or Drawables using their names rather than their integer IDs provides greater flexibility in application development. To achieve this, the getIdentifier() method from the Resources class is employed.

The syntax for getIdentifier() is:

int getIdentifier(String name, String defType, String defPackage)

Where:

• name is the name of the resource, without the resource type prefix (e.g., "myString")
• defType is the type of the resource, such as "drawable" or "string"
• defPackage is the name of the package where the resource is defined

For example, to obtain the Drawable resource ID for an image named "my_image.png":

int drawableResourceId = this.getResources().getIdentifier("my_image", "drawable", this.getPackageName());

Similarly, to get the String resource ID for a value named "welcome_text":

int stringResourceId = this.getResources().getIdentifier("welcome_text", "string", this.getPackageName());

Note that obtaining resource IDs in this manner can be slower than using the integer IDs directly. Hence, it should be used judiciously when the resource name is dynamic or requires programmatic access.

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