报错日志：
02-15 17:54:54.969 1895-1895/? E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.coordinatorlayoutdemo, PID: 1895
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.coordinatorlayoutdemo/com.example.coordinatorlayoutdemo.MainActivity}: android.view.InflateException: Binary XML file line #0: Binary XML file line #0: Error inflating class android.support.design.widget.CoordinatorLayout
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2856)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2931)
at android.app.ActivityThread.-wrap11(Unknown Source:0)
at android.app.ActivityThreadMethodAndArgsCaller.run(Zygote.java:240)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:782)
Caused by: android.view.InflateException: Binary XML file line #0: Binary XML file line #0: Error inflating class android.support.design.widget.CoordinatorLayout
Caused by: android.view.InflateException: Binary XML file line #0: 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:334)
at android.view.LayoutInflater.createView(LayoutInflater.java:651)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:794)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:734)
at android.view.LayoutInflater.inflate(LayoutInflater.java:496)
at android.view.LayoutInflater.inflate(LayoutInflater.java:427)
at android.view.LayoutInflater.inflate(LayoutInflater.java:374)
at com.android.internal.policy.PhoneWindow.setContentView(PhoneWindow.java:418)
at android.app.Activity.setContentView(Activity.java:2708)
at com.example.coordinatorlayoutdemo.MainActivity.onCreate(MainActivity.java:13)
at android.app.Activity.performCreate(Activity.java:7040)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1214)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2809)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2931)
at android.app.ActivityThread.-wrap11(Unknown Source:0)
at android.app.ActivityThreadMethodAndArgsCaller.run(Zygote.java:240)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:782)
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:33)
at android.support.design.widget.CoordinatorLayout.(CoordinatorLayout.java:206)
at android.support.design.widget.CoordinatorLayout.(CoordinatorLayout.java:200)
at java.lang.reflect.Constructor.newInstance0(Native Method)
at java.lang.reflect.Constructor.newInstance(Constructor.java:334)
at android.view.LayoutInflater.createView(LayoutInflater.java:651)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:794)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:734)
at android.view.LayoutInflater.inflate(LayoutInflater.java:496)
at android.view.LayoutInflater.inflate(LayoutInflater.java:427)
at android.view.LayoutInflater.inflate(LayoutInflater.java:374)
at com.android.internal.policy.PhoneWindow.setContentView(PhoneWindow.java:418)
at android.app.Activity.setContentView(Activity.java:2708)
at com.example.coordinatorlayoutdemo.MainActivity.onCreate(MainActivity.java:13)
at android.app.Activity.performCreate(Activity.java:7040)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1214)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2809)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2931)
at android.app.ActivityThread.-wrap11(Unknown Source:0)
at android.app.ActivityThreadMethodAndArgsCaller.run(Zygote.java:240)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:782)
按网上的说法，要使用CoordinatorLayout，应该直接在build.gradle中添加依赖 compile 'com.android.support:design:26.1.0' 便可：
可是添加后在布局文件中引用时，却出现无法预览的问题：
后来百度了一下，说是要修改主题为AppTheme中的其中一种，但是默认不就是AppTheme吗，好吧，改：
改完之后还是不行，预览没问题了，但是编译会闪退报错，即报了开头日志的错误，又搜了半天，发现要在AndroidManifest.xml中进行修改才行，直接将主题替换为：android:theme="@style/Theme.AppCompat.Light.NoActionBar"，然后build一下项目或者重启就可以了。要用design包下的东西，基本上都要改这个。
