Android 资源链接失败，错误 : attribute defaultNavHost (aka . ..) not found, ttribute navGraph (aka...) not found

Question

我试图在我的应用程序中实现导航功能。当我尝试构建应用程序时，输出显示:

Android resource linking failed
/home/mateusz/AndroidStudioProjects/TakeAndTie/app/src/main/res/layout/activity_main.xml:23: error: attribute defaultNavHost (aka com.mateuszpolito.takeandtie:defaultNavHost) not found.
/home/mateusz/AndroidStudioProjects/TakeAndTie/app/src/main/res/layout/activity_main.xml:23: error: attribute navGraph (aka com.mateuszpolito.takeandtie:navGraph) not found.
error: failed linking file resources.

这是来自 activity_main.xml 的 nav_host_fragment:

        <fragment
                android:id="@+id/nav_host_fragment"
                android:name="androidx.navigation.fragment.NavHostFragment"
                android:layout_width="0dp"
                android:layout_height="0dp"
                app:layout_constraintLeft_toLeftOf="parent"
                app:layout_constraintRight_toRightOf="parent"
                app:layout_constraintTop_toTopOf="parent"
                app:layout_constraintBottom_toBottomOf="parent"

                app:defaultNavHost="true"
                app:navGraph="@navigation/nav_graph" />

我已经在我的应用级别 build.gradle 中实现了导航:

    implementation "androidx.navigation:navigation-ui-ktx:2.1.0-alpha02"

我正在使用 Android Studio 3.4 版

Answer 1

您可以添加到项目的 build.gradle 中:

classpath "androidx.navigation:navigation-safe-args-gradle-plugin:2.2.0-alpha03"

并在 app/build.gradle

apply plugin: "androidx.navigation.safeargs.kotlin"
implementation "androidx.navigation:navigation-fragment-ktx:$nav_version"
implementation "androidx.navigation:navigation-ui-ktx:$nav_version"