app:srcCompat - 矢量绘图显示在设计预览中，但不显示在应用程序中

app:srcCompat - Vector drawable shows up in design preview, but doesn#39;t show up in app(app:srcCompat - 矢量绘图显示在设计预览中，但不显示在应用程序中)

问题描述

drawable/information.xml

drawable/information.xml

<vector xmlns:android="http://schemas.android.com/apk/res/android"
        android:width="24dp"
        android:height="24dp"
        android:viewportWidth="24.0"
        android:viewportHeight="24.0">
    <path
        android:fillColor="#FF000000"
        android:pathData="M13,9H11V7H13M13,17H11V11H13M12,2A10,10 0,0 0,2 12A10,10 0,0 0,12 22A10,10 0,0 0,22 12A10,10 0,0 0,12 2Z"/>
</vector>

LayoutofCardView.xml

LayoutofCardView.xml

<ImageView
    android:layout_width="24dp"
    android:background="#f00"
    android:layout_height="24dp"
    android:id="@+id/informationImageView"
    app:srcCompat="@drawable/information"
    tools:src="@drawable/information"
    />

build.gradle

build.gradle

apply plugin: 'com.android.application'

android {
    compileSdkVersion 23
    buildToolsVersion "23.0.2"

    defaultConfig {
        applicationId "com.company"
        minSdkVersion 15
        targetSdkVersion 23
        versionCode 1
        versionName "1.0"
        generatedDensities = []

    }
    aaptOptions {
        additionalParameters "--no-version-vectors"
    }

    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
    packagingOptions {
        exclude 'META-INF/NOTICE.txt'
        exclude 'META-INF/LICENSE.txt'
    }
}

dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    testCompile 'junit:junit:4.12'
    compile 'com.android.support:appcompat-v7:23.2.1'
    compile 'com.android.support:cardview-v7:23.2.1'
    compile 'com.android.support:recyclerview-v7:23.2.1'
    compile 'com.android.support:support-v4:23.2.1'
}

图像在 android studio 的设计窗格中正确显示.但是当我运行应用程序时，图像没有显示出来.图片在cardView中，在recyclerviewfragment中.其他项目正确渲染只有矢量drawbles不渲染.

The image shows up correctly in the design pane of android studio. But when I run the app, the image doesn't show up. The image is in cardView, which is in recyclerviewfragment. other items render correctly only vector drawbles don't render.

另外，布局文件中会显示 Lint 错误

Also, Lint error shows up in the layout file

unexpected namespace prefix "app" found for tag ImageView app:srcCompat

推荐答案

将此行 vectorDrawables.useSupportLibrary = true 作为 defaultConfig 语句的一部分插入到您的 build.graddle 文件中.我使用了 这里 并且有效.认为您必须意识到 Gradle 2.0+ 和 Gradle 1.5 的配置看起来不同.

Insert this line vectorDrawables.useSupportLibrary = true into your build.graddle file as part of the defaultConfig statement. I've used the descriptions that are provided here and it works. Think you have to be aware that config looks different for Gradle 2.0+ and Gradle 1.5.

无论您使用的是什么 Gradle 版本，您都必须确保您的活动必须扩展 AppCompatActivity 提供矢量支持.

Regardless of the Gradle version you're using, you have to ensure that that your activity has to extend AppCompatActivity to provide vector support.

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