如何读取应用程序文件夹下的配置文件 [英] How to read a config file which is under app folder

问题描述

我在app文件夹中有一个配置文件config.properties.我正在使用哪个在build.gradle中进行构建配置. 我需要用Java代码读取此文件.但是我可以弄清楚我应该使用path.我如何用Java代码读取此文件.下面的代码给了我FileNotFoundException

I am having a config fie config.properties inside app folder . Which i am using for build configurations in build.gradle. I need to read this file in java code . But i can figure out the path should i use . How can i read this file in java code . code below gives me FileNotFoundException

 try {
        Properties properties = new Properties();
        File inputStream=new File("/config.properties");
        properties.load(new FileInputStream(inputStream));
        return properties.getProperty("BASE_URL");
    }catch (IOException e){
        e.printStackTrace();
    }

我在build.gradle中使用了相同的文件，并且运行良好.如下.

I am using the same file in build.gradle and its working well . as below .

 defaultConfig {
    Properties versionProps = new Properties()
    versionProps.load(new FileInputStream(file('config.properties')))
    def properties_versionCode = versionProps['VERSION_CODE'].toInteger()
    def properties_versionName = versionProps['VERSION_NAME']
    def properties_appid= versionProps['APPLICATION_ID']


    applicationId properties_appid
    minSdkVersion 14
    targetSdkVersion 26
    versionCode properties_versionCode
    versionName properties_versionName
    testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
}

build.gradle部分工作正常，我能够分配属性.但是我需要在java类中读取相同的文件. File应该使用什么路径.

build.gradle part is working fine and i am able to assign properties . But i need to read the same file in a java class . What path should i use for File.

配置文件如下:

VERSION_NAME=1.0.0
VERSION_CODE=1
APPLICATION_ID=com.app.drecula
BASE_URL=https://reqres.in/

推荐答案

理想情况下，应将特定于应用程序的文件放在Assets文件夹下，并将gradle构建配置和特定于应用程序的配置分开.在assets/configs文件夹下添加应用程序特定的配置属性文件.然后，您可以阅读如下内容:

Ideally you should put application specific file under assets folder and separate your gradle build configuration and application specific configuration. Add application specific configuration properties file under assets/configs folder. Then you can read it as follows:

  final Properties properties = new Properties();
  final AssetManager assetManager = getAssets();
  final InputStream inputStream= assetManager.open("configs/config.properties");
  properties.load(inputStream);

如果您仍要继续，那么唯一的方法是将文件放在资产文件夹中，并在您的build.gradle使用中

If you still want to proceed, then only way would be to put the file in assets folder and in your build.gradle use

versionProps.load(new FileInputStream(file('/src/main/assets/config/config.properties')))

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