Question

我正在使用Dagger 2并希望使用它为Android Studio中的不同构建版本注入不同的依赖项。

public class DemoApplication extends Application{

AppComponent component;

    @Override
    public void onCreate() {
        super.onCreate();

 component = DaggerAppComponent.builder().module(new Module()).build();
    }
}


@Module
public class Module {

    @Provides
    @Singleton
    public ClassA provideClassA(){
        return new ClassA();
    }
}



@Component (modules = {Module.class})
public interface AppComponent {

    ClassA getClassA();

}

现在假设我希望ClassA的对象返回prod flavor，但是在调试风格中返回ClassB的对象（从ClassA扩展）。

Answer 1

使用特定于风味的源集

例如，让我们考虑模拟和生产风格。创建'use strict' const stockItems = [ { item: "sword", type: "weapon", weight: "5 lbs.", cost: "10 gold" }, { item: "hammer", type: "weapon", weight: "8 lbs.", cost: "7 gold" } ]; function isEquivalent(a, b) { // Create arrays of property names const aProps = Object.getOwnPropertyNames(a); const bProps = Object.getOwnPropertyNames(b); // If number of properties is different, // objects are not equivalent if (aProps.length != bProps.length) { return false; } for (let i = 0; i < aProps.length; i++) { const propName = aProps[i]; // If values of same property are not equal, // objects are not equivalent if (a[propName] !== b[propName]) { return false; } } // If we made it this far, objects // are considered equivalent return true; } // normal indexof will not work with object because it uses strict equality function myIndexOf(array, object) { for (let i = 0; i < array.length; i++) { if (isEquivalent(array[i], object)) return i; } return -1; } function getUniqueRandomItem(shopItems) { //from stock var item; while (true) { item = stockItems[Math.floor(Math.random() * stockItems.length)]; if (myIndexOf(shopItems, item) < 0) return item; } } function buildShopItems(count) { count = stockItems.length < count ? stockItems.length : count; const shopItems = []; for (let i = 0; i < count; i++) { const item = getUniqueRandomItem(shopItems); shopItems.push(item); } return shopItems; } const shopItems = buildShopItems(1); console.log(shopItems);和mock目录并将它们放在production旁边，在main和Module目录中放置一个名为mock的单独类也必须是一样的）。这样，当您切换构建变体时，编译器将引用production或Module类中的mock类，允许您根据风格注入不同的实现。< / p>

查看源集上的此参考：http://tools.android.com/tech-docs/new-build-system/user-guide#TOC-Sourcesets-and-Dependencies

这个答案可能也会有所帮助：How the flavor-specific variants are working?

Dagger2-切换不同风格的依赖关系：Android Studio

1 个答案:

使用特定于风味的源集