java - 我无法打开我的类，只能找到一个 BuildConfig 文件

Question

出于未知原因，android studio 项目中的 java 文件有一个从其他项目的其他包指向 BuildConfig 类的子箭头

/**
 * Automatically generated file. DO NOT MODIFY
 */
package alsayed.aly.maintenanceplaner;

public final class BuildConfig {
  public static final boolean DEBUG = Boolean.parseBoolean("true");
  public static final String APPLICATION_ID = "alsayed.aly.maintenanceplaner";
  public static final String BUILD_TYPE = "debug";
  public static final String FLAVOR = "";
  public static final int VERSION_CODE = 1;
  public static final String VERSION_NAME = "1.0";
}

我尝试恢复它，但它无法像现在刚刚创建的文件一样工作。

Answer 1

在构建时，Gradle 会生成 BuildConfig 类，以便您的应用代码可以检查有关当前构建的信息。

您还可以使用 buildConfigField() 方法将自定义字段从 Gradle 构建配置文件添加到 BuildConfig 类，并在应用的运行时代码中访问这些值。同样，您可以使用 resValue() 添加应用程序资源值。

 android {
  ...
  buildTypes {
    release {
      // These values are defined only for the release build, which
      // is typically used for full builds and continuous builds.
      buildConfigField("String", "BUILD_TIME", "\"${minutesSinceEpoch}\"")
      resValue("string", "build_time", "${minutesSinceEpoch}")
      ...
    }
    debug {
      // Use static values for incremental builds to ensure that
      // resource files and BuildConfig aren't rebuilt with each run.
      // If they were dynamic, they would prevent certain benefits of
      // Instant Run as well as Gradle UP-TO-DATE checks.
      buildConfigField("String", "BUILD_TIME", "\"0\"")
      resValue("string", "build_time", "0")
    }
  }
}

在您的应用代码中，您可以按如下方式访问属性:

Log.i(TAG, BuildConfig.BUILD_TIME);
Log.i(TAG, getString(R.string.build_time));