Android API 19 借助 Support Library (23.4.0) 无法正确加载 Vector Drawable

Question

最近想用Vector Drawable来管理所有的图标。 Vector Drawable 在 Android API 21+ 上运行良好，但当我尝试在我的一台测试设备 [Amazon KFTHWI Android 4.4.3 API 19] 上使用它时，所有图标根本无法加载！

我遵循了提示 Here and Here。但是还是不行....

这是我的配置：

在项目gradle脚本文件中：

buildscript {
  repositories {
    jcenter()
  }
  dependencies {
    classpath 'com.android.tools.build:gradle:2.1.0'
    classpath ...
  }
}

所以我的gradle插件版本应该是2.0+

在主模块 gradle 脚本文件中：

android{
    ...
    defaultConfig{
        ...
        vectorDrawables.useSupportLibrary = true
        ...
    }
}
dependencies{
    ...
    compile 'com.android.support:appcompat-v7:23.4.0'
    compile 'com.android.support:gridlayout-v7:23.4.0'
    ...
}

此主模块包含应用程序。我编译gridlayout-v7库的原因是因为我在应用程序中使用了一些Gridlayouts。

这是我的实现：

因为需要根据接收到的数据生成一些视图，所以我在java代码中设置了图片来源

ImageView icon = new ImageView(this);
icon.setImageResource(R.drawable.ic_lock_black_24dp);

ic_lock_black_24dp.xml 是从 Vector Asset Studio 中的 Material 图标库生成的。

我的期望：

我相信我在主模块 gradle 脚本文件中的配置将阻止 Android Studio 为矢量生成 Png，并允许 Android 直接在运行次。

但我只是部分正确...我的配置实际上阻止了 Android Studio 在构建时生成 Png。但是我的旧 android 设备 [API 19] 无法从 Vectors 生成 Drawables！！所以现在应用程序中没有图标...

以下是例外情况： [Amazon KFTHWI Android 4.4.3 API 19]

W/ImageView:Unable to find resource:2130837702
    android.content.res.Resources$NotFoundException:  File res/drawable/ic_lock_black_24dp.xml from drawable resource ID#0x7f0200c6
        at android.content.res.Resources.loadDrawable(Resources.java:2206)
        at android.content.res.Resources.getDrawable(Resources.java:707)
        at android.widget.ImageView.resolveUri(ImageView.java:651)
        at android.widget.ImageView.onMeasure(ImageView.java:774)
        at android.view.View.measure(View.java:17038)
        at android.widget.RelativeLayout.measureChild(RelativeLayout.java:689)
        at android.widget.RelativeLayout.onMeasure(RelativeLayout.java:473)
        at android.view.View.measure(View.java:17038)
        at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5191)
        at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1404)
        at android.widget.LinearLayout.measureVertical(LinearLayout.java:695)
        at android.widget.LinearLayout.onMeasure(LinearLayout.java:588)
        at android.view.View.measure(View.java:17038)
        at android.widget.RelativeLayout.measureChild(RelativeLayout.java:689)
        at android.widget.RelativeLayout.onMeasure(RelativeLayout.java:473)
        at android.view.View.measure(View.java:17038)
        at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5191)
        at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1404)
        at android.widget.LinearLayout.measureHorizontal(LinearLayout.java:1052)
        at android.widget.LinearLayout.onMeasure(LinearLayout.java:590)
        at android.view.View.measure(View.java:17038)
        at android.support.v7.widget.GridLayout.measureChildWithMargins2(GridLayout.java:896)
        at android.support.v7.widget.GridLayout.measureChildrenWithMargins(GridLayout.java:906)
        at android.support.v7.widget.GridLayout.onMeasure(GridLayout.java:945)
        at android.view.View.measure(View.java:17038)
        at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5191)
        at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1404)
        at android.widget.LinearLayout.measureVertical(LinearLayout.java:695)
        at android.widget.LinearLayout.onMeasure(LinearLayout.java:588)
        at android.view.View.measure(View.java:17038)
        at android.widget.ScrollView.measureChildWithMargins(ScrollView.java:1273)
        at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
        at android.widget.ScrollView.onMeasure(ScrollView.java:373)
        at android.view.View.measure(View.java:17038)
        at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5191)
        at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1404)
        at android.widget.LinearLayout.measureVertical(LinearLayout.java:695)
        at android.widget.LinearLayout.onMeasure(LinearLayout.java:588)
        at android.view.View.measure(View.java:17038)
        at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5191)
        at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
        at android.view.View.measure(View.java:17038)
        at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5191)
        at com.android.internal.widget.ActionBarOverlayLayout.onMeasure(ActionBarOverlayLayout.java:327)
        at android.view.View.measure(View.java:17038)
        at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5191)
        at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
        at com.android.internal.policy.impl.PhoneWindow$DecorView.onMeasure(PhoneWindow.java:2346)
        at android.view.View.measure(View.java:17038)
        at android.view.ViewRootImpl.performMeasure(ViewRootImpl.java:2004)
        at android.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:1176)
        at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1368)
        at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1057)
        at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:5857)
        at android.view.Choreographer$CallbackRecord.run(Choreographer.java:815)
        at android.view.Choreographer.doCallbacks(Choreographer.java:628)
        at android.view.Choreographer.doFrame(Choreographer.java:598)
        at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:801)
        at android.os.

具有讽刺意味的是，如果我不使用 AppCompat 支持库，所有图标都会很好地显示，但我知道这是因为 Android Studio 在构建时会生成 Png。我什至可以在 APK 中找到那些 Png。

我的问题：

现在，我仍然希望在旧 android 设备中受益于 Vector Drawable，这意味着我仍在努力避免使用 Pngs...有人可以给我一些提示或告诉我哪些步骤我做错了什么？

Answer 1

我正在使用一个支持 api 14+ 的 VectorDrawable 和 AnimatedVectorDrawable 库：https://github.com/wnafee/vector-compat

Answer 2

你必须说new AppCompatImageView(this)。手动创建视图时，您必须添加 AppCompat 前缀。

Android API 19 借助 Support Library (23.4.0) 无法正确加载 Vector Drawable

Vector Drawable cannot be loaded properly in Android API 19 with the help of Support Library (23.4.0)

android

vector-graphics

android-appcompat

android-support-library