[JAVA] [Android] How to convert a character string to resourceId

important point

--fragment will result in an error unless getActivity (). getPackageName () is used. --If you use Integer.parseInt (), you get a java.lang.NumberFormatException error.

`MainActivity.java`


//java.lang.I get a NumberFormatException error
String bookImage = "book_image";
int imageId = Integer.parseInt(bookImage);

How to convert a string to resourceId in Activity

`MainActivity.java`


String bookImage = "book_image";
int imageId = getResources().getIdentifier(
                    bookImage, "drawable", getPackageName());

-----------------------------
//Output result
bookImage : book_image
imageId   : 2131099756 (Some number)

How to convert a string to resourceId in Fragment

`MainFragment.java`


String bookImage = "book_image";
int imageId = getResources().getIdentifier(
                    bookImage, "drawable", getActivity().getPackageName());

-----------------------------
//Output result
bookImage : book_image
imageId   : 2131099756(Some number)

Recommended Posts

[Android] How to convert a character string to resourceId

[Java] How to convert a character string from String type to byte type

[Java] How to cut out a character string character by character

[Java] How to erase a specific character from a character string

Convert iso-2022-jp character string to utf-8

[Java] How to use substring to cut out a character string

[Convenient to remember !!!] How to convert from LocalDate type to character string and from character string to LocalDate type

Convert to a tag to URL string in Rails

Convert a string to a character-by-character array with swift

How to convert a solidity contract to a Java contract class

[Java] How to use substring to cut out a part of a character string