创建一个活动导致错误膨胀类android.support.design.widget.coordinatorlayout

Question

该应用程序工作正常，然后我添加了一个新活动，它开始给我这个错误。我尝试将主题设置为应用程序兼容主题，并使用应用程序兼容活动。仍然没有用。

Process: info.androidhive.loginandregistration, PID: 28764
    java.lang.RuntimeException: Unable to start activity ComponentInfo{info.androidhive.loginandregistration/info.androidhive.loginandregistration.activity.MainScreenActivity}: android.view.InflateException: Binary XML file line #11: Binary XML file line #2: Error inflating class android.support.design.widget.CoordinatorLayout
    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2646)
    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2707)
    at android.app.ActivityThread.-wrap12(ActivityThread.java)
    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1460)
    at android.os.Handler.dispatchMessage(Handler.java:102)
    at android.os.Looper.loop(Looper.java:154)
    at android.app.ActivityThread.main(ActivityThread.java:6077)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:865)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:755)
    Caused by: android.view.InflateException: Binary XML file line #11: Binary XML file line #2: Error inflating class android.support.design.widget.CoordinatorLayout
    Caused by: android.view.InflateException: Binary XML file line #2: Error inflating class android.support.design.widget.CoordinatorLayout
    Caused by: java.lang.reflect.InvocationTargetException
    at java.lang.reflect.Constructor.newInstance0(Native Method)
    at java.lang.reflect.Constructor.newInstance(Constructor.java:430)
    at android.view.LayoutInflater.createView(LayoutInflater.java:645)
    at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:787)
    at android.view.LayoutInflater.parseInclude(LayoutInflater.java:964)
    at android.view.LayoutInflater.rInflate(LayoutInflater.java:854)
    at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:821)
    at android.view.LayoutInflater.inflate(LayoutInflater.java:518)
    at android.view.LayoutInflater.inflate(LayoutInflater.java:426)
    at android.view.LayoutInflater.inflate(LayoutInflater.java:377)
    at android.support.v7.app.AppCompatDelegateImplV7.setContentView(AppCompatDelegateImplV7.java:280)
    at android.support.v7.app.AppCompatActivity.setContentView(AppCompatActivity.java:140)
    at info.androidhive.loginandregistration.activity.MainScreenActivity.onCreate(MainScreenActivity.java:69)
    at android.app.Activity.performCreate(Activity.java:6664)
    at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1118)
    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2599)
    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2707)
    at android.app.ActivityThread.-wrap12(ActivityThread.java)
    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1460)
    at android.os.Handler.dispatchMessage(Handler.java:102)
    at android.os.Looper.loop(Looper.java:154)
    at android.app.ActivityThread.main(ActivityThread.java:6077)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:865)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:755)
    Caused by: java.lang.IllegalArgumentException: You need to use a Theme.AppCompat theme (or descendant) with the design library.
    at android.support.design.widget.ThemeUtils.checkAppCompatTheme(ThemeUtils.java:36)
    at android.support.design.widget.CoordinatorLayout.<init>(CoordinatorLayout.java:185)
    at android.support.design.widget.CoordinatorLayout.<init>(CoordinatorLayout.java:179)
    at java.lang.reflect.Constructor.newInstance0(Native Method) 
    at java.lang.reflect.Constructor.newInstance(Constructor.java:430) 
    at android.view.LayoutInflater.createView(LayoutInflater.java:645) 
    at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:787) 
    at android.view.LayoutInflater.parseInclude(LayoutInflater.java:964) 
    at android.view.LayoutInflater.rInflate(LayoutInflater.java:854) 
    at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:821) 
    at android.view.LayoutInflater.inflate(LayoutInflater.java:518) 
    at android.view.LayoutInflater.inflate(LayoutInflater.java:426) 
    at android.view.LayoutInflater.inflate(LayoutInflater.java:377) 
    at android.support.v7.app.AppCompatDelegateImplV7.setContentView(AppCompatDelegateImplV7.java:280) 
    at android.support.v7.app.AppCompatActivity.setContentView(AppCompatActivity.java:140) 
    at info.androidhive.loginandregistration.activity.MainScreenActivity.onCreate(MainScreenActivity.java:69) 
    at android.app.Activity.performCreate(Activity.java:6664) 
    at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1118) 
    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2599) 
    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2707) 
    at android.app.ActivityThread.-wrap12(ActivityThread.java) 
    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1460) 
    at android.os.Handler.dispatchMessage(Handler.java:102) 
    at android.os.Looper.loop(Looper.java:154) 
    at android.app.ActivityThread.main(ActivityThread.java:6077) 

Answer 1

java.lang.IllegalArgumentException: You need to use a Theme.AppCompat theme (or descendant) with the design library

我的猜测是：

• 首次创建应用程序时，您在新项目向导中创建了第一个活动时，您将" make fackwards compatible(appcompat("复选框

未选中

• 当您添加新活动时，您会通过新活动向导进行，这次您离开了该复选框

您的整体应用程序主题将不使用Theme.AppCompat，因为您通过取消选中该复选框选择了appcompat-v7。您的新活动正在扩展AppCompatActivity，但是它仍在使用应用程序主题，这是一个会产生错误的冲突。

战术上，将新的MainScreenActivity更改为从Activity而不是AppCompatActivity延伸。您可能需要根据选择哪种活动模板以及创建的资源进行其他调整(例如，在菜单资源中的属性上将app:更改为CC_7(。

从策略上讲，您需要确定是否要使用appcompat-v7，然后坚持使用该项目的选择。使用appcompat-v7可以使您在Android版本(返回API级别14(中的外观和外观有些一致，而在编写应用程序时，您的应用程序成本〜1MB 〜1MB，并且在编写应用程序时又有一些复杂性。