我想尝试谷歌给我们的新玩具,我遇到了麻烦.
这是我的build.gradle:
apply plugin: 'com.android.application' android { compileSdkVersion 'android-L' buildToolsVersion "20.0.0" defaultConfig { applicationId "com.tod.android.lpreviewtest" minSdkVersion 'L' targetSdkVersion 'L' versionCode 1 versionName "1.0" } buildTypes { release { runProguard false proguardFiles getDefaultProguardFile('proguard-android.txt'),'proguard-rules.pro' } } } dependencies { compile fileTree(dir: 'libs',include: ['*.jar']) compile 'com.android.support:cardview-v7:+' }
现在我的布局:
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:paddingLeft="@dimen/activity_horizontal_margin" android:paddingRight="@dimen/activity_horizontal_margin" android:paddingTop="@dimen/activity_vertical_margin" android:paddingBottom="@dimen/activity_vertical_margin" tools:context=".MyActivity"> <android.support.v7.widget.CardView xmlns:card_view="http://schemas.android.com/apk/res-auto" android:id="@+id/card_view" android:layout_gravity="center" android:layout_width="200dp" android:layout_height="200dp" card_view:cardCornerRadius="4dp"> <TextView android:id="@+id/info_text" android:layout_width="match_parent" android:layout_height="match_parent" /> </android.support.v7.widget.CardView> </RelativeLayout>
当我在android studio中切换到屏幕预览时,我得到一个渲染错误:
Rendering Problems The following classes could not be instantiated: -android.support.v7.widget.CardView (Open Class,Show Exception) Exception Details java.lang.ClassFormatError: Illegal field name "CardView.Dark" in class android/support/v7/cardview/R$style at java.lang.ClassLoader.defineClass1(ClassLoader.java:-2) at java.lang.ClassLoader.defineClass(ClassLoader.java:792) at java.lang.ClassLoader.defineClass(ClassLoader.java:635) at java.lang.ClassLoader.loadClass(ClassLoader.java:424) at java.lang.ClassLoader.loadClass(ClassLoader.java:411) at java.lang.ClassLoader.loadClass(ClassLoader.java:357) at android.support.v7.widget.CardView.initialize(CardView.java:69) at android.support.v7.widget.CardView.<init>(CardView.java:60) at java.lang.reflect.Constructor.newInstance(Constructor.java:526) at android.view.LayoutInflater.rInflate_Original(LayoutInflater.java:802) at android.view.LayoutInflater_Delegate.rInflate(LayoutInflater_Delegate.java:64) at android.view.LayoutInflater.rInflate(LayoutInflater.java:778) at android.view.LayoutInflater.inflate(LayoutInflater.java:500) at android.view.LayoutInflater.inflate(LayoutInflater.java:381)
我尝试忽略错误,并在avd中运行该应用程序,而一切编译正常,布局中不会显示卡片视图.请帮忙!
附:我正在使用新的Android Studio beta 0.8.0