Php 有人能帮我解决这个问题吗？不幸的是<；应用程序名称>；停止

1-content_main.xml

<RelativeLayout
            xmlns:android="http://schemas.android.com/apk/res/android"
            xmlns:app="http://schemas.android.com/apk/res-auto"
            xmlns:tools="http://schemas.android.com/tools"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:paddingBottom="@dimen/activity_vertical_margin"
            android:paddingLeft="@dimen/activity_horizontal_margin"
            android:paddingRight="@dimen/activity_horizontal_margin"
            android:paddingTop="@dimen/activity_vertical_margin"
            app:layout_behavior="@string/appbar_scrolling_view_behavior"
            tools:context="mx.newmx.MainActivity"
            tools:showIn="@layout/activity_main">   
            <WebView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:id="@+id/activity_main_webview" /> 
 </RelativeLayout>

4-我的日志请检查一下

03-04 14:48:25.448 7418-7418/mx.newmx W/AwContents: onDetachedFromWindow called when already detached. Ignoring
03-04 14:48:25.468 7418-7418/mx.newmx D/AndroidRuntime: Shutting down VM
03-04 14:48:25.469 7418-7418/mx.newmx E/AndroidRuntime: FATAL EXCEPTION: main
Process: mx.newmx, PID: 7418
java.lang.RuntimeException: Unable to start activity ComponentInfo{mx.newmx/mx.newmx.MainActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'android.view.View android.webkit.WebView.findViewById(int)' on a null object reference
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2416)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2476)
at android.app.ActivityThread.-wrap11(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1344)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:5417)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'android.view.View android.webkit.WebView.findViewById(int)' on a null object reference
at mx.newmx.MainActivity.onCreate(MainActivity.java:30)
at android.app.Activity.performCreate(Activity.java:6237)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1107)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2369)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2476) 
at android.app.ActivityThread.-wrap11(ActivityThread.java) 
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1344) 
at android.os.Handler.dispatchMessage(Handler.java:102) 
at android.os.Looper.loop(Looper.java:148) 
at android.app.ActivityThread.main(ActivityThread.java:5417) 
at java.lang.reflect.Method.invoke(Native Method) 
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726) 

这是我如何创建我的第一个网络视图，但这给出了错误不幸的是，应用程序名称已停止，请任何人检查问题在哪里与代码，以便我可以继续

myWebView = (WebView) myWebView.findViewById(R.id.activity_main_webview);

这是我如何创建我的第一个网络视图，但这给出了错误不幸的是，应用程序名称已停止，请任何人检查问题在哪里与代码，以便我可以继续

myWebView = (WebView) myWebView.findViewById(R.id.activity_main_webview);

删除myWebView仅使用findViewById，如下所示

 myWebView = (WebView) findViewById(R.id.activity_main_webview);

---

你正在膨胀不同的布局。请查收

setContentView(R.layout.activity_main);

---

检查stackoverflow上的

java.lang.NullPointerException:

是什么。你遇到了这个异常。你能帮我解决问题吗？

myWebView=（WebView）findViewById（R.id.activity\u main\u WebView）你能解释一下吗？我想你在不包含webview的活动中夸大了不同的布局。。请检查还是一样，我有改变这也没有运气
setContentView(R.layout.activity_main);