最近,我想使用矢量图形来管理所有的图标。矢量图形在Android API 21+上运行良好,但是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,所有的图标都无法加载!
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以上
在主模块的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'
...
}
这个主模块包含了应用程序。 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。
下面是我的实现:
因为我需要根据接收到的数据生成一些视图,所以我在Java代码中设置了图片源。
ImageView icon = new ImageView(this);
icon.setImageResource(R.drawable.ic_lock_black_24dp);
ic_lock_black_24dp.xml是从矢量素材工作室中的Material Icon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防止Android Studio为矢量图生成Pngs,并允许Android直接在运行时生成矢量图形的Drawable。
但我只是部分正确...我的配置实际上防止了Android Studio在构建时生成Pngs。但是,我的旧Android设备[API 19]无法从矢量图形生成Drawable!因此现在应用程序中没有图标...
以下是异常情况:[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.
Ironically,如果我不使用AppCompat支持库,所有的图标都会呈现得很好,但我知道这是因为Android Studio在构建过程中生成了PNG文件。我甚至可以在APK包中找到这些PNG文件。
我的问题: 现在,我仍然希望在旧的Android设备中受益于Vector Drawable,这意味着我仍在尝试避免使用PNG文件... 有人能给我一些提示或告诉我哪些步骤出错了吗?
VectorDrawableCompat
实例和icon.setImageDrawable
方法。 - pskinkR.drawable.ic_lock_black_24dp
的翻译:去掉结尾的.xml
,资源名称没有扩展名。 - Eugen Pechanec