皮棉报告 "Hardcoded Package in Namespace"

Question

今天当我想从我的项目中获得一个版本时，android工作室显示这个错误：

android {
    lintOptions {
        checkReleaseBuilds false
        // Or, if you prefer, you can continue to check for errors in release builds,
        // but continue the build even when errors are found:
        abortOnError false
    }
}

所以我打开 lint 的报告文件夹，看到这个错误：

<issue
    id="ResAuto"
    severity="Fatal"
    message="In Gradle projects, always use `http://schemas.android.com/apk/res-auto` for custom attributes"
    category="Correctness"
    priority="9"
    summary="Hardcoded Package in Namespace"
    explanation="In Gradle projects, the actual package used in the final APK can vary; for example,you can add a `.debug` package suffix in one version and not the other. Therefore, you should **not** hardcode the application package in the resource; instead, use the special namespace `http://schemas.android.com/apk/res-auto` which will cause the tools to figure out the right namespace for the resource regardless of the actual package used during the build."
    errorLine1="    xmlns:app=&quot;http://schemas.android.com/apk/res/ir.app.appname&quot;>">"
    errorLine2="               ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~"
    quickfix="studio">
    <location
        file="C:\...\app\src\main\res\color\mybutton_backgroundcolor.xml"
        line="3"
        column="16"/>
</issue>

mybutton_backgroundcolor.xml:

<selector xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res/ir.app.appname">

    <item android:state_enabled="true" app:state_read ="false" android:color="@color/backgrpund_button_success"/>

    <item android:state_enabled="false" app:state_read ="false" android:color="@color/gray_4"/>
    <item app:state_read ="true" android:color="@color/gray_4"/>

</selector>

错误在此 xmlns:app="http://schemas.android.com/apk/res/ir.app.appname"> 行中。

有人可以帮我解决这个问题吗？！

更新： 在我将 com.android.support 库更新到版本 28

后出现此错误

Answer 1

app 命名空间应声明为 xmlns:app="http://schemas.android.com/apk/res-auto":

正如 Lint 所说：

In Gradle projects, the actual package used in the final APK can vary; for you can add a .debug package suffix in one version and not the other. Therefore, you should not hardcode the application package in the resource; instead, use the special namespace http://schemas.android.com/apk/res-auto which will cause the tools to figure out the right namespace for the resource regardless of the actual package used during the build.

皮棉报告 "Hardcoded Package in Namespace"

Lint report "Hardcoded Package in Namespace"

xml

android

lint

hardcode