android - FloatingActionButton无法启动活动ComponentInfo

Question

我想在我的应用程序中使用浮动操作按钮,为此我获得了最新的支持库22.2.1并将其作为库添加到我的应用程序中.我清理了项目,没有更多的错误.然后我把这个代码放在我的xml布局中,但是当我运行我的应用程序时,我遇到了一个我无法解决的错误.

这是我的xml代码:

<?xml version="1.0" encoding="utf-8"?>
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:padding="4dp" >

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical" >
        <android.support.design.widget.FloatingActionButton
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="bottom"
            android:layout_margin="16dp"
            android:clickable="true"
            android:src="@drawable/ic_action_person" />
    </LinearLayout>

</ScrollView>

这不是整个代码,我在linearlayout中有一些其他的视图,最后我放了FloatingActionButton.

当我运行我的应用程序时,我收到此错误:

   FATAL EXCEPTION: main
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.karaj.project/com.karaj.project.FistActiivty}: android.view.InflateException: Binary XML file line #301: Error inflating class android.support.design.widget.FloatingActionButton
    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2211)
    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2261)
    at android.app.ActivityThread.access$600(ActivityThread.java:141)
    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1256)
    at android.os.Handler.dispatchMessage(Handler.java:99)
    at android.os.Looper.loop(Looper.java:137)
    at android.app.ActivityThread.main(ActivityThread.java:5103)
    at java.lang.reflect.Method.invokeNative(Native Method)
    at java.lang.reflect.Method.invoke(Method.java:525)
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
    at dalvik.system.NativeStart.main(Native Method)
Caused by: android.view.InflateException: Binary XML file line #301: Error inflating class android.support.design.widget.FloatingActionButton
    at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:707)
    at android.view.LayoutInflater.rInflate(LayoutInflater.java:755)
    at android.view.LayoutInflater.rInflate(LayoutInflater.java:758)
    at android.view.LayoutInflater.inflate(LayoutInflater.java:492)
    at android.view.LayoutInflater.inflate(LayoutInflater.java:397)
    at com.karaj.project.DrawerActivity.setContentView(DrawerActivity.java:73)
    at com.karaj.project.FistActiivty.onCreate(FistActiivty.java:88)
    at android.app.Activity.performCreate(Activity.java:5133)
    at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)
    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2175)
    ... 11 more
Caused by: java.lang.ClassNotFoundException: Didn't find class "android.support.design.widget.FloatingActionButton" on path: DexPathList[[zip file "/data/app/com.karaj.persiandesigners-1.apk"],nativeLibraryDirectories=[/data/app-lib/com.karaj.persiandesigners-1, /system/lib]]
    at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:53)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:501)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:461)
    at android.view.LayoutInflater.createView(LayoutInflater.java:559)
    at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:696)
    ... 20 more

我究竟做错了什么 ？谢谢

Answer 1

不要将支持库作为jar文件添加到项目中,将此行添加到gradle文件中

compile 'com.android.support:design:22.2.1'

并更新android支持"REPOSITORY"

http://android-developers.blogspot.com/2015/05/android-design-support-library.html