the log is:
Process: com.kelin.mvvmlight.zhihu, PID: 4824
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.kelin.mvvmlight.zhihu/com.kelin.mvvmlight.zhihu.MainActivity}: android.view.InflateException: Binary XML file line #26: Error inflating class android.support.design.widget.CollapsingToolbarLayout
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2282)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2340)
at android.app.ActivityThread.access$800(ActivityThread.java:157)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1247)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:157)
at android.app.ActivityThread.main(ActivityThread.java:5293)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1265)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1081)
at dalvik.system.NativeStart.main(Native Method)
Caused by: android.view.InflateException: Binary XML file line #26: Error inflating class android.support.design.widget.CollapsingToolbarLayout
at android.view.LayoutInflater.createView(LayoutInflater.java:626)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:702)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:761)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:769)
at android.view.LayoutInflater.parseInclude(LayoutInflater.java:855)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:751)
at android.view.LayoutInflater.inflate(LayoutInflater.java:498)
at android.view.LayoutInflater.inflate(LayoutInflater.java:398)
at android.view.LayoutInflater.inflate(LayoutInflater.java:354)
at android.support.v7.app.AppCompatDelegateImplV7.setContentView(AppCompatDelegateImplV7.java:280)
at android.support.v7.app.AppCompatActivity.setContentView(AppCompatActivity.java:140)
at android.databinding.DataBindingUtil.setContentView(DataBindingUtil.java:276)
at android.databinding.DataBindingUtil.setContentView(DataBindingUtil.java:261)
at com.kelin.mvvmlight.zhihu.MainActivity.onCreate(MainActivity.java:34)
at android.app.Activity.performCreate(Activity.java:5389)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1105)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2246)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2340)
at android.app.ActivityThread.access$800(ActivityThread.java:157)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1247)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:157)
at android.app.ActivityThread.main(ActivityThread.java:5293)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1265)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1081)
at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.reflect.InvocationTargetException
at java.lang.reflect.Constructor.constructNative(Native Method)
at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
at android.view.LayoutInflater.createView(LayoutInflater.java:600)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:702)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:761)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:769)
at android.view.LayoutInflater.parseInclude(LayoutInflater.java:855)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:751)
at android.view.LayoutInflater.inflate(LayoutInflater.java:498)
at android.view.LayoutInflater.inflate(LayoutInflater.java:398)
at android.view.LayoutInflater.inflate(LayoutInflater.java:354)
at android.support.v7.app.AppCompatDelegateImplV7.setContentView(AppCompatDelegateImplV7.java:280)
at android.support.v7.app.AppCompatActivity.setContentView(AppCompatActivity.java:140)
at android.databinding.DataBindingUtil.setContentView(DataBindingUtil.java:276)
at android.databinding.DataBindingUtil.setContentView(DataBindingUtil.java:261)
at com.kelin.mvvmlight.zhihu.MainActivity.onCreate(MainActivity.java:34)
at android.app.Activity.performCreate(Activity.java:5389)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1105)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2246)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2340)
at android.app.ActivityThread.access$800(ActivityThread.java:157)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1247)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:157)
at android.app.ActivityThread.main(ActivityThread.java:5293)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1265)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1081)
at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.NoSuchMethodError: android.support.v4.graphics.drawable.DrawableCompat.setLayoutDirection
at android.support.design.widget.CollapsingToolbarLayout.setStatusBarScrim(CollapsingToolbarLayout.java:663)
at android.support.design.widget.CollapsingToolbarLayout.(CollapsingToolbarLayout.java:197)
at android.support.design.widget.CollapsingToolbarLayout.(CollapsingToolbarLayout.java:132)
at java.lang.reflect.Constructor.constructNative(Native Method)
at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
at android.view.LayoutInflater.createView(LayoutInflater.java:600)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:702)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:761)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:769)
at android.view.LayoutInflater.parseInclude(LayoutInflater.java:855)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:751)
at android.view.LayoutInflater.inflate(LayoutInflater.java:498)
at android.view.LayoutInflater.inflate(LayoutInflater.java:398)
at android.view.LayoutInflater.inflate(LayoutInflater.java:354)
at android.support.v7.app.AppCompatDelegateImplV7.setContentView(AppCompatDelegateImplV7.java:280)
at android.support.v7.app.AppCompatActivity.setContentView(AppCompatActivity.java:140)
at android.databinding.DataBindingUtil.setContentView(DataBindingUtil.java:276)
at android.databinding.DataBindingUtil.setContentView(DataBindingUtil.java:261)
at com.kelin.mvvmlight.zhihu.MainActivity.onCreate(MainActivity.java:34)
at android.app.Activity.performCreate(Activity.java:5389)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1105)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2246)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2340)
at android.app.ActivityThread.access$800(ActivityThread.java:157)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1247)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:157)
at android.app.ActivityThread.main(ActivityThread.java:5293)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1265)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1081)
at dalvik.system.NativeStart.main(Native Method)
the log is: Process: com.kelin.mvvmlight.zhihu, PID: 4824 java.lang.RuntimeException: Unable to start activity ComponentInfo{com.kelin.mvvmlight.zhihu/com.kelin.mvvmlight.zhihu.MainActivity}: android.view.InflateException: Binary XML file line #26: Error inflating class android.support.design.widget.CollapsingToolbarLayout at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2282) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2340) at android.app.ActivityThread.access$800(ActivityThread.java:157) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1247) at android.os.Handler.dispatchMessage(Handler.java:102) at android.os.Looper.loop(Looper.java:157) at android.app.ActivityThread.main(ActivityThread.java:5293) at java.lang.reflect.Method.invokeNative(Native Method) at java.lang.reflect.Method.invoke(Method.java:515) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1265) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1081) at dalvik.system.NativeStart.main(Native Method) Caused by: android.view.InflateException: Binary XML file line #26: Error inflating class android.support.design.widget.CollapsingToolbarLayout at android.view.LayoutInflater.createView(LayoutInflater.java:626) at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:702) at android.view.LayoutInflater.rInflate(LayoutInflater.java:761) at android.view.LayoutInflater.rInflate(LayoutInflater.java:769) at android.view.LayoutInflater.parseInclude(LayoutInflater.java:855) at android.view.LayoutInflater.rInflate(LayoutInflater.java:751) at android.view.LayoutInflater.inflate(LayoutInflater.java:498) at android.view.LayoutInflater.inflate(LayoutInflater.java:398) at android.view.LayoutInflater.inflate(LayoutInflater.java:354) at android.support.v7.app.AppCompatDelegateImplV7.setContentView(AppCompatDelegateImplV7.java:280) at android.support.v7.app.AppCompatActivity.setContentView(AppCompatActivity.java:140) at android.databinding.DataBindingUtil.setContentView(DataBindingUtil.java:276) at android.databinding.DataBindingUtil.setContentView(DataBindingUtil.java:261) at com.kelin.mvvmlight.zhihu.MainActivity.onCreate(MainActivity.java:34) at android.app.Activity.performCreate(Activity.java:5389) at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1105) at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2246) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2340) at android.app.ActivityThread.access$800(ActivityThread.java:157) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1247) at android.os.Handler.dispatchMessage(Handler.java:102) at android.os.Looper.loop(Looper.java:157) at android.app.ActivityThread.main(ActivityThread.java:5293) at java.lang.reflect.Method.invokeNative(Native Method) at java.lang.reflect.Method.invoke(Method.java:515) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1265) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1081) at dalvik.system.NativeStart.main(Native Method) Caused by: java.lang.reflect.InvocationTargetException at java.lang.reflect.Constructor.constructNative(Native Method) at java.lang.reflect.Constructor.newInstance(Constructor.java:423) at android.view.LayoutInflater.createView(LayoutInflater.java:600) at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:702) at android.view.LayoutInflater.rInflate(LayoutInflater.java:761) at android.view.LayoutInflater.rInflate(LayoutInflater.java:769) at android.view.LayoutInflater.parseInclude(LayoutInflater.java:855) at android.view.LayoutInflater.rInflate(LayoutInflater.java:751) at android.view.LayoutInflater.inflate(LayoutInflater.java:498) at android.view.LayoutInflater.inflate(LayoutInflater.java:398) at android.view.LayoutInflater.inflate(LayoutInflater.java:354) at android.support.v7.app.AppCompatDelegateImplV7.setContentView(AppCompatDelegateImplV7.java:280) at android.support.v7.app.AppCompatActivity.setContentView(AppCompatActivity.java:140) at android.databinding.DataBindingUtil.setContentView(DataBindingUtil.java:276) at android.databinding.DataBindingUtil.setContentView(DataBindingUtil.java:261) at com.kelin.mvvmlight.zhihu.MainActivity.onCreate(MainActivity.java:34) at android.app.Activity.performCreate(Activity.java:5389) at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1105) at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2246) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2340) at android.app.ActivityThread.access$800(ActivityThread.java:157) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1247) at android.os.Handler.dispatchMessage(Handler.java:102) at android.os.Looper.loop(Looper.java:157) at android.app.ActivityThread.main(ActivityThread.java:5293) at java.lang.reflect.Method.invokeNative(Native Method) at java.lang.reflect.Method.invoke(Method.java:515) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1265) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1081) at dalvik.system.NativeStart.main(Native Method) Caused by: java.lang.NoSuchMethodError: android.support.v4.graphics.drawable.DrawableCompat.setLayoutDirection at android.support.design.widget.CollapsingToolbarLayout.setStatusBarScrim(CollapsingToolbarLayout.java:663) at android.support.design.widget.CollapsingToolbarLayout.(CollapsingToolbarLayout.java:197)
at android.support.design.widget.CollapsingToolbarLayout.(CollapsingToolbarLayout.java:132)
at java.lang.reflect.Constructor.constructNative(Native Method)
at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
at android.view.LayoutInflater.createView(LayoutInflater.java:600)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:702)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:761)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:769)
at android.view.LayoutInflater.parseInclude(LayoutInflater.java:855)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:751)
at android.view.LayoutInflater.inflate(LayoutInflater.java:498)
at android.view.LayoutInflater.inflate(LayoutInflater.java:398)
at android.view.LayoutInflater.inflate(LayoutInflater.java:354)
at android.support.v7.app.AppCompatDelegateImplV7.setContentView(AppCompatDelegateImplV7.java:280)
at android.support.v7.app.AppCompatActivity.setContentView(AppCompatActivity.java:140)
at android.databinding.DataBindingUtil.setContentView(DataBindingUtil.java:276)
at android.databinding.DataBindingUtil.setContentView(DataBindingUtil.java:261)
at com.kelin.mvvmlight.zhihu.MainActivity.onCreate(MainActivity.java:34)
at android.app.Activity.performCreate(Activity.java:5389)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1105)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2246)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2340)
at android.app.ActivityThread.access$800(ActivityThread.java:157)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1247)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:157)
at android.app.ActivityThread.main(ActivityThread.java:5293)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1265)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1081)
at dalvik.system.NativeStart.main(Native Method)