如何为特定的应用程序构建（调试/发布）使用特定的字段？

Question

I use gradle to build my android project. When the build type is Debug , I want to change a boolean value in java file Constans.java .

public static final boolean IS_TEST_ENVIRONMENT = false;

I use this value to control my app request different server. How to do that, I can't find any information.

Answer 1

You could create your own build variables:

buildTypes {
    debug {

        buildConfigField "boolean","IS_TEST_ENVIRONMENT","false"
    }
}

Answer 2

You can add as many fields as you want by editing your build.gradle file like this:

buildTypes {
    debug {
        buildConfigField "boolean","IS_TEST_ENVIRONMENT","true"
        buildConfigField "boolean","SOME_OTHER_FIELD","false"
    }
    release {
        buildConfigField "boolean","IS_TEST_ENVIRONMENT","true"
        buildConfigField "boolean","SOME_OTHER_FIELD","true"
        runProguard true
        proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
    }

}

For me however it would not at first recognize the field with

if (BuildConfig.IS_TEST_ENVIRONMENT) {
    // Do something on Debug build
}
if (BuildConfig.SOME_OTHER_FIELD) {
    // Do something else
}

Rebuilding didn't help either. What helped was just simply restarting my AndroidStudio.