在支持库(23.4.0)的帮助下,无法在Android API 19中正确加载Vector Drawable

最近,我想使用Vector Drawable来管理所有图标. Vector Drawable在 Android API 21上运行良好,但当我尝试在我的一个测试设备[Amazon KFTHWI Android 4.4.3 API 19]上使用它时,根本无法加载所有图标！

我按照提示Here和Here.但它仍然无法正常工作….

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'
    ...
}

此主模块包含该应用程序.
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.

这是我的实施：

因为我需要根据收到的数据生成一些视图,所以我在java代码中设置了图像源.

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 Icon库生成的.

我的期望：

我相信我的主模块gradle脚本文件中的配置将阻止Android Studio生成Pngs for Vectors,并允许Android在运行时直接生成Drawables for Vectors.

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.但我的旧Android设备[API 19]无法从矢量生成Drawables !!所以现在应用程序中没有图标……

以下是例外情况：[亚马逊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.

可以肯定的是,如果我不使用AppCompat支持库,所有图标都会很好用,但我知道这是因为Android Studio在构建时会生成Png.我甚至可以在APK中找到那些Png.

我的问题：

现在,我仍然希望从旧的Android设备中的Vector Drawable中受益,这意味着我仍然试图避免使用Png …有人可以给我一些提示或者告诉我在哪些步骤中我做错了什么？

解决方法

你必须说新的AppCompatImageView(这个).手动创建视图时,必须添加AppCompat前缀.