Android Studio 构建风格 - 如何拥有不同风格的相同源文件

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问题描述

我需要在 android studio 中为应用创建一个演示风格.在我的应用程序级 gradle 文件中，我创建了另一种名为 demo 的风格，当然还有默认的 full 风格.它看起来像这样:

I need to create a demo flavor in android studio for an app. In my app level gradle file i have created another flavor called demo and the default flavor of full of course. It looks like this:

apply plugin: 'com.android.application'

android {
    compileSdkVersion 22
    buildToolsVersion "21.1.2"

    defaultConfig {
        applicationId "com.example.uen229.myapplication"
        minSdkVersion 17
        targetSdkVersion 22
        versionCode 1
        versionName "1.0"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }

    productFlavors {
        demo {
            applicationId "com.buildsystemexample.app.demo"
            versionName "1.0-demo"
        }
        full {
            applicationId "com.buildsystemexample.app.full"
            versionName "1.0-full"
        }
    }

}

dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    compile 'com.android.support:appcompat-v7:22.2.0'
}

这是我在其中创建了一个演示风格目录的项目结构的图像:

and here is a image of my project structure in which I have created a demo flavor directory:

现在进入正题.我有两个名为 Hello.java 的类.两者都有各自的口味并打印不同的东西.我现在将向您展示这两个文件:

Now onto the issue. I have two classes called Hello.java. Both are in there respective flavors and print different things. I'll show you both files now:

import android.util.Log;

/** this is from demo flavor directory**/

public class Hello {

    Hello(){

        Log.v("","hello from demo");
    }

    public String getName();
        return "im from demo";

    };

}

这是另一个你好:

package com.example.uen229.myapplication;

import android.util.Log;


/** this is from full or main flavor directory**/
public class Hello {


    Hello(){

        Log.v("", "hello from main");
    }

    public String getName(){

        return "im from main";

    };
}

注意第一个 hello.java 没有包，即使我有一个包，IDE 也不会编译.看看这张照片:

notice how the first hello.java does not have package, even if i had a package the IDE wont compile. look at this photo:

现在最后让我们看一下 mainActivity.java，看看当我切换构建变体时，它只会为im from main"做一个祝酒词，但如果我使用 demoDebug 构建变体，我需要它打印im from demo".如果我将构建变体切换到 demoDebug 它仍然打印im from main".任何人都可以帮忙:

Now finally lets look at mainActivity.java to see that when i switch build variants it only does a toast for "im from main" but i need it to print 'im from demo" if i use the demoDebug build variant. If i switch the build variant to demoDebug it still prints "im from main". can anyone help :

public class MainActivity extends ActionBarActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        Hello h = new Hello();
        Toast.makeText(this, h.getName(), Toast.LENGTH_LONG).show();

    }
}

更新

从stackoverflow它说:

UPDATE

From stackoverflow it says:

如果你想在两个相同的类中有不同的版本您需要以两种口味创建它.

src/flavor1/java/com/foo/A.java

src/flavor2/java/com/foo/A.java

然后你在 src/main/java 中的代码可以做:

And then your code in src/main/java can do:

import com.foo.A

根据选择的风格，com.foo.A 的正确版本是用过.

depending on the flavor selected, the right version of com.foo.A is used.

这就是我想用Hello类完成的

This is what I want to accomplish with the Hello class

风格