Android - Import Java Class into Activity

Question

I have a java class called Constants filled with variables. And currently if I want to use that variable in an activity I have to use it like this.

Constants.variable = "blah blah";

Is there a way to import my Constants class into my activity so that I can just use it like a normal variable like this

variable = "blah blah";

I have tried

import com.myname.appname.Constants;

but this doesn't seem to work.

Thanks for the help in advance.

score 6 · Answer 1 · answered Dec 05 '14 at 06:18

6

considering Constants.variable is a static variable

import static com.myname.appname.Constant.*;

this will import all you static variables in you current namespace only the static variable

import static com.myname.appname.Constant.variable;

now you can use variable like a normal variable

answered Dec 05 '14 at 06:18

Munawwar Hussain Shelia

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so the * will get all the variables and/ or I can specify just one? – Dec 05 '14 at 06:21
putting * will import all the static variable.. .that totally depends on you.. u only want to import specific variable or all the variable – Munawwar Hussain Shelia Dec 05 '14 at 06:22

score 2 · Answer 2 · answered Dec 05 '14 at 06:13

2

try:

import com.myname.appname.Constants;

Are you using an IDE?

Also, they way you have stated is how you are suppose to use a Constants class. But you are not suppose to assign anything... because the variable are suppose to be constant, ie. static final

answered Dec 05 '14 at 06:13

tachyonflux

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that what I did try I'm using android studio – Dec 05 '14 at 06:15

score 2 · Answer 3 · answered Jun 30 '16 at 05:07

2

You have to declare "variable" as static and import the class as static by following syntax

    import static com.myname.appname.Constants.*;

answered Jun 30 '16 at 05:07

jafarbtech

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score 1 · Answer 4 · edited May 23 '17 at 12:22

1

Is there a way to import my constants class into my activity so that I can just use it like a normal variable like this

I dont think so, its not what import for.

See this SO question : Meaning of the import statement in a Java file

edited May 23 '17 at 12:22

Community

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answered Dec 05 '14 at 06:14

Blaze Tama

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Android - Import Java Class into Activity

4 Answers4