FAILED EXCEPTION无法启动活动ComponentInfo

Question

我是应用程序开发的新手，我正在使用标签导航应用程序，我的应用程序工作正常，直到我尝试删除模板附带的Foward操作按钮。当我尝试运行我的应用程序并在调试它告诉我主要的FATAL异常后，我立即崩溃。无法启动活动组件信息。如果有人能找到我的错误，我将不胜感激。

我是否应该将我的webview代码放在选项卡1的java类中？我目前在主要活动中有它。我还在调试时添加了错误

  

MainActivity.java

package com.example.edgar.multiversecorpcomics;

import android.support.design.widget.TabLayout;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;

import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;
import android.support.v4.view.ViewPager;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;

import android.webkit.WebView;
import android.widget.TextView;

public class MainActivity extends AppCompatActivity {

    private SectionsPagerAdapter mSectionsPagerAdapter;
    private ViewPager mViewPager;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        String url = "https://www.previewsworld.com/NewReleases?cat=1";
        WebView view = (WebView) this.findViewById(R.id.webview);
        view.getSettings().setJavaScriptEnabled(true);
        view.loadUrl(url);

        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);
        // Create the adapter that will return a fragment for each of the three
        // primary sections of the activity.
        mSectionsPagerAdapter = new SectionsPagerAdapter(getSupportFragmentManager());

        // Set up the ViewPager with the sections adapter.
        mViewPager = (ViewPager) findViewById(R.id.container);
        mViewPager.setAdapter(mSectionsPagerAdapter);

        TabLayout tabLayout = (TabLayout) findViewById(R.id.tabs);
        tabLayout.setupWithViewPager(mViewPager);

    }


    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.menu_main, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();

        //noinspection SimplifiableIfStatement
        if (id == R.id.action_settings) {
            return true;
        }

        return super.onOptionsItemSelected(item);
    }

    public class SectionsPagerAdapter extends FragmentPagerAdapter {

        public SectionsPagerAdapter(FragmentManager fm) {
            super(fm);
        }

        @Override
        public Fragment getItem(int position) {
            //returning the current tabs
            switch (position) {
                case 0:
                    tab1 tab1 = new tab1();
                    return tab1;
                case 1:
                    tab2 tab2 = new tab2();
                    return tab2;
                case 2:
                    tab3 tab3 = new tab3();
                    return tab3;
                default:
                    return null;
            }


        }

        @Override
        public int getCount() {
            // Show 3 total pages.
            return 3;
        }

        @Override
        public CharSequence getPageTitle(int position) {
            switch (position) {
                case 0:

                    return "Weekly";
                case 1:

                    return "Videos";
                case 2:

                    return "Subscribers";
            }
            return null;
        }
    }
}

  

activity_main.xml中

<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout 
    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:id="@+id/main_content"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:fitsSystemWindows="true"
    tools:context="com.example.edgar.multiversecorpcomics.MainActivity">


    <android.support.design.widget.AppBarLayout
        android:id="@+id/appbar"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:paddingTop="@dimen/appbar_padding_top"
        android:theme="@style/AppTheme.AppBarOverlay">

          <android.support.v7.widget.Toolbar
              android:id="@+id/toolbar"
              android:layout_width="match_parent"
              android:layout_height="?attr/actionBarSize"
              android:background="?attr/colorPrimary"
              app:layout_scrollFlags="scroll|enterAlways"
              app:popupTheme="@style/AppTheme.PopupOverlay">

         </android.support.v7.widget.Toolbar>

    </android.support.design.widget.AppBarLayout>

    <android.support.v4.view.ViewPager
        android:id="@+id/container"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        app:layout_behavior=""/>


    <android.support.design.widget.TabLayout
        android:id="@+id/tabs"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />


</android.support.design.widget.CoordinatorLayout>

  

生病包括我的第一个标签，因为我正在努力尝试   当这一切都出错时设置一个webview

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
     xmlns:tools="http://schemas.android.com/tools"
     xmlns:android="http://schemas.android.com/apk/res/android"
     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">

   <android.support.design.widget.CoordinatorLayout
        android:id="@+id/Container"
        android:layout_width="match_parent"
        android:layout_height="match_parent">

   </android.support.design.widget.CoordinatorLayout>

   <WebView
        android:id="@+id/webview"
        android:layout_width="match_parent"
        android:layout_height="match_parent" >

   </WebView>

</RelativeLayout>

调试错误

E/AndroidRuntime: FATAL EXCEPTION: main
              Process: com.example.edgar.multiversecorpcomics, PID: 5460
              android.view.InflateException: Binary XML file line #0: Binary XML file line #0: Error inflating class webview
              Caused by: android.view.InflateException: Binary XML file line #0: Error inflating class webview
              Caused by: java.lang.ClassNotFoundException: Didn't find class "android.view.webview" on path: DexPathList[[zip file "/data/app/com.example.edgar.multiversecorpcomics-oGAyzVox825VJ3WIzvxEsw==/base.apk", zip file "/data/app/com.example.edgar.multiversecorpcomics-oGAyzVox825VJ3WIzvxEsw==/split_lib_dependencies_apk.apk", zip file "/data/app/com.example.edgar.multiversecorpcomics-oGAyzVox825VJ3WIzvxEsw==/split_lib_slice_0_apk.apk", zip file "/data/app/com.example.edgar.multiversecorpcomics-oGAyzVox825VJ3WIzvxEsw==/split_lib_slice_1_apk.apk", zip file "/data/app/com.example.edgar.multiversecorpcomics-oGAyzVox825VJ3WIzvxEsw==/split_lib_slice_2_apk.apk", zip file "/data/app/com.example.edgar.multiversecorpcomics-oGAyzVox825VJ3WIzvxEsw==/split_lib_slice_3_apk.apk", zip file "/data/app/com.example.edgar.multiversecorpcomics-oGAyzVox825VJ3WIzvxEsw==/split_lib_slice_4_apk.apk", zip file "/data/app/com.example.edgar.multiversecorpcomics-oGAyzVox825VJ3WIzvxEsw==/split_lib_slice_5_apk.apk", zip file "/data/app/com.example.edgar.multiversecorpcomics-oGAyzVox825VJ3WIzvxEsw==/split_lib_slice_6_apk.apk", zip file "/data/app/com.example.edgar.multiversecorpcomics-oGAyzVox825VJ3WIzvxEsw==/split_lib_slice_7_apk.apk", zip file "/data/app/com.example.edgar.multiversecorpcomics-oGAyzVox825VJ3WIzvxEsw==/split_lib_slice_8_apk.apk", zip file "/data/app/com.example.edgar.multiversecorpcomics-oGAyzVox825VJ3WIzvxEsw==/split_lib_slice_9_apk.apk"],nativeLibraryDirectories=[/data/app/com.example.edgar.multiversecorpcomics-oGAyzVox825VJ3WIzvxEsw==/lib/arm64, /system/lib64, /vendor/lib64]]
                  at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:125)
                  at java.lang.ClassLoader.loadClass(ClassLoader.java:379)
                  at java.lang.ClassLoader.loadClass(ClassLoader.java:312)
                  at android.view.LayoutInflater.createView(LayoutInflater.java:606)
                  at android.view.LayoutInflater.onCreateView(LayoutInflater.java:703)
                  at com.android.internal.policy.PhoneLayoutInflater.onCreateView(PhoneLayoutInflater.java:68)
                  at android.view.LayoutInflater.onCreateView(LayoutInflater.java:720)
                  at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:788)
                  at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:730)
                  at android.view.LayoutInflater.rInflate(LayoutInflater.java:863)
                  at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:824)
                  at android.view.LayoutInflater.inflate(LayoutInflater.java:515)
                  at android.view.LayoutInflater.inflate(LayoutInflater.java:423)
                  at com.example.edgar.multiversecorpcomics.tab1.onCreateView(tab1.java:19)
                  at android.support.v4.app.Fragment.performCreateView(Fragment.java:2239)
                  at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1332)
                  at android.support.v4.app.FragmentManagerImpl.moveFragmentToExpectedState(FragmentManager.java:1574)
                  at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1641)
                  at android.support.v4.app.BackStackRecord.executeOps(BackStackRecord.java:794)
                  at android.support.v4.app.FragmentManagerImpl.executeOps(FragmentManager.java:2415)
                  at android.support.v4.app.FragmentManagerImpl.executeOpsTogether(FragmentManager.java:2200)
                  at android.support.v4.app.FragmentManagerImpl.optimizeAndExecuteOps(FragmentManager.java:2153)
                  at android.support.v4.app.FragmentManagerImpl.execSingleAction(FragmentManager.java:2034)
                  at android.support.v4.app.BackStackRecord.commitNowAllowingStateLoss(BackStackRecord.java:651)
                  at android.support.v4.app.FragmentPagerAdapter.finishUpdate(FragmentPagerAdapter.java:143)
                  at android.support.v4.view.ViewPager.populate(ViewPager.java:1239)
                  at android.support.v4.view.ViewPager.populate(ViewPager.java:1087)

E / AndroidRuntime：在android.support.v4.view.ViewPager.onMeasure（ViewPager.java:1613）                       在android.view.View.measure（View.java:22071）                       在android.view.ViewGroup.measureChildWithMargins（ViewGroup.java:6602）                       在android.support.design.widget.CoordinatorLayout.onMeasureChild（CoordinatorLayout.java:713）                       在android.support.design.widget.HeaderScrollingViewBehavior.onMeasureChild（HeaderScrollingViewBehavior.java:90）                       在android.support.design.widget.AppBarLayout $ ScrollingViewBehavior.onMeasureChild（AppBarLayout.java:1389）                       在android.support.design.widget.CoordinatorLayout.onMeasure（CoordinatorLayout.java:783）                       在android.view.View.measure（View.java:22071）                       在android.view.ViewGroup.measureChildWithMargins（ViewGroup.java:6602）                       在android.widget.FrameLayout.onMeasure（FrameLayout.java:185）                       在android.support.v7.widget.ContentFrameLayout.onMeasure（ContentFrameLayout.java:139）                       在android.view.View.measure（View.java:22071）                       在android.view.ViewGroup.measureChildWithMargins（ViewGroup.java:6602）                       在android.widget.LinearLayout.measureChildBeforeLayout（LinearLayout.java:1514）                       在android.widget.LinearLayout.measureVertical（LinearLayout.java:806）                       在android.widget.LinearLayout.onMeasure（LinearLayout.java:685）                       在android.view.View.measure（View.java:22071）                       在android.view.ViewGroup.measureChildWithMargins（ViewGroup.java:6602）                       在android.widget.FrameLayout.onMeasure（FrameLayout.java:185）                       在android.view.View.measure（View.java:22071）                       在android.view.ViewGroup.measureChildWithMargins（ViewGroup.java:6602）                       在android.widget.LinearLayout.measureChildBeforeLayout（LinearLayout.java:1514）                       在android.widget.LinearLayout.measureVertical（LinearLayout.java:806）                       在android.widget.LinearLayout.onMeasure（LinearLayout.java:685）                       在android.view.View.measure（View.java:22071）                       在android.view.ViewGroup.measureChildWithMargins（ViewGroup.java:6602）                       在android.widget.FrameLayout.onMeasure（FrameLayout.java:185）                       在com.android.internal.policy.DecorView.onMeasure（DecorView.java:724）                       在android.view.View.measure（View.java:22071）                       在android.view.ViewRootImpl.performMeasure（ViewRootImpl.java:2422）                       在android.view.ViewRootImpl.measureHierarchy（ViewRootImpl.java:1504）                       在android.view.ViewRootImpl.performTraversals（ViewRootImpl.java:1761）                       在android.view.ViewRootImpl.doTraversal（ViewRootImpl.java:1392）                       在android.view.ViewRootImpl $ TraversalRunnable.run（ViewRootImpl.java:6752）                       在android.view.Choreographer $ CallbackRecord.run（Choreographer.java:911）                       在android.view.Choreographer.doCallbacks（Choreographer.java:723）                       在android.view.Choreographer.doFrame（Choreographer.java:658）                       在android.view.Choreographer $ FrameDisplayEventReceiver.run（Choreographer.java:897）                       在android.os.Handler.handleCallback（Handler.java:790）                       在android.os.Handler.dispatchMessage（Handler.java:99）                       在android.os.Looper.loop（Looper.java:164）                       在android.app.ActivityThread.main（ActivityThread.java:6494）                       at java.lang.reflect.Method.invoke（Native Method）                       在com.android.internal.os.RuntimeInit $ MethodAndArgsCaller.run（RuntimeInit.java:438）                       在com.android.internal.os.ZygoteInit.main（ZygoteInit.java:807） 断开与目标VM的连接，地址：＆＃39; localhost：8600＆＃39;，transport：＆＃39; socket＆＃39;