遇到一个空指针问题：findViewById(int)' on a null object reference

[xyz-fly]

Caused by java.lang.NullPointerException: Attempt to invoke virtual method 'android.view.View android.app.Activity.findViewById(int)' on a null object reference
at cn.dreamtobe.kpswitch.util.KeyboardUtil.attach(SourceFile:166)
at cn.com.app.evolution.main.message.widget.MessageEditInputPanel.onAttachedToWindow(SourceFile:120)
at android.view.View.dispatchAttachedToWindow(View.java:17381)
at android.view.ViewGroup.dispatchAttachedToWindow(ViewGroup.java:3319)
at android.view.ViewGroup.dispatchAttachedToWindow(ViewGroup.java:3326)
at android.view.ViewGroup.dispatchAttachedToWindow(ViewGroup.java:3326)
at android.view.ViewGroup.addViewInner(ViewGroup.java:4955)
at android.view.ViewGroup.addView(ViewGroup.java:4746)
at android.view.ViewGroup.addView(ViewGroup.java:4718)
at android.view.LayoutInflater.inflate(LayoutInflater.java:524)
at android.view.LayoutInflater.inflate(LayoutInflater.java:423)
at android.view.LayoutInflater.inflate(LayoutInflater.java:374)
at android.support.v7.app.AppCompatDelegateImplV9.setContentView(SourceFile:287)
at android.support.v7.app.AppCompatActivity.setContentView(SourceFile:139)
at cn.com.app.evolution.main.message.ChatMessageP2PActivity.onCreate(SourceFile:201)
at android.app.Activity.performCreate(Activity.java:6975)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1214)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2775)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2897)
at android.app.ActivityThread.handleRelaunchActivity(ActivityThread.java:4769)
at android.app.ActivityThread.-wrap18(Unknown Source)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1604)
at android.os.Handler.dispatchMessage(Handler.java:105)
at android.os.Looper.loop(Looper.java:251)
at android.app.ActivityThread.main(ActivityThread.java:6563)
at java.lang.reflect.Method.invoke(Method.java)
at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:240)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:767)

其他信息：
Caused by android.view.InflateException: Binary XML file line #2: Attempt to invoke virtual method 'android.view.View android.app.Activity.findViewById(int)' on a null object reference

出现的机型：华为和sony 系统版本为8