Import library only for debugging

问题

I am using stetho lib for debugging my app.

Gradle:

debugCompile 'com.facebook.stetho:stetho:1.4.1'
debugCompile 'com.uphyca:stetho_realm:2.0.0'

Application class:

if (BuildConfig.DEBUG) {
    Stetho.initialize(..);
}

But if I need to create a release version I must comment every time:

import com.facebook.stetho.Stetho; 
import com.uphyca.stetho_realm.RealmInspectorModulesProvider;

How to show the compiler that these libs only for debugging? Can we comment on two lines without creating an additional class, using annotations or something like this?

回答1:

Just leave the unused imports as they are. Your approach of if (BuildConfig.DEBUG) is perfectly valid. And frankly the best way to implement it.

Unused imports have no impact on performance: reference. There might be a trivial increase in compile time, but no increase in runtime.

Import statements don't make it to byte code.

You will need to change Gradle:

debugCompile 'com.facebook.stetho:stetho:1.4.1'
debugCompile 'com.uphyca:stetho_realm:2.0.0'

to

compile 'com.facebook.stetho:stetho:1.4.1'
compile 'com.uphyca:stetho_realm:2.0.0'

来源：https://stackoverflow.com/questions/45076313/import-library-only-for-debugging