Why is my Android app crashing with 'Error inflating class fragment'?

Question

So I added a <WebView> to the standard navigation drawer template and added some code to the java file. However, now the app keeps on crashing. The error it throws in the console is Error inflating class fragment It does compile though. So how can I fix this? Should I add the <WebView> somewhere else?

activity_login.xml

<android.support.v4.widget.DrawerLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/drawer_layout"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".login">

    <WebView  xmlns:android="http://schemas.android.com/apk/res/android"
        android:id="@+id/main_webview"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />

    <fragment android:id="@+id/navigation_drawer"
        android:layout_width="@dimen/navigation_drawer_width"
        android:layout_height="match_parent"
        android:layout_gravity="start"
        android:name="test.vwebviewdrawer.NavigationDrawerFragment"
        tools:layout="@layout/fragment_navigation_drawer" />

</android.support.v4.widget.DrawerLayout>

main.java

package test.webviewdrawer;

import android.support.v4.app.FragmentActivity;
import android.support.v7.app.ActionBarActivity;
import android.support.v7.app.ActionBar;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.widget.DrawerLayout;
import android.view.View.OnClickListener;
//...


public class login extends ActionBarActivity
    implements NavigationDrawerFragment.NavigationDrawerCallbacks {


private NavigationDrawerFragment mNavigationDrawerFragment;
private CharSequence mTitle;

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

    mNavigationDrawerFragment = (NavigationDrawerFragment)
            getSupportFragmentManager().findFragmentById(R.id.navigation_drawer);
    mTitle = getTitle();

    // Set up the drawer.
    mNavigationDrawerFragment.setUp(
            R.id.navigation_drawer,
            (DrawerLayout) findViewById(R.id.drawer_layout));
}

@Override
public void onNavigationDrawerItemSelected(int position) {
    WebView myWebView = (WebView) findViewById(R.id.main_webview);
    String pageUrl = "http://www.google.com";
    myWebView.loadUrl(pageUrl);

}

public void onSectionAttached(int number) {
    switch (number) {
        case 1:
            mTitle = getString(R.string.title_section1);
            break;
        case 2:
            mTitle = getString(R.string.title_section2);
            break;
        case 3:
            mTitle = getString(R.string.title_section3);
            break;
        case 4:
            mTitle = getString(R.string.title_section4);
            break;
    }
}

public void restoreActionBar() {
    ActionBar actionBar = getSupportActionBar();
    actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_STANDARD);
    actionBar.setDisplayShowTitleEnabled(true);
    actionBar.setTitle(mTitle);
}


@Override
public boolean onCreateOptionsMenu(Menu menu) {
    if (!mNavigationDrawerFragment.isDrawerOpen()) {
        getMenuInflater().inflate(R.menu.login, menu);
        restoreActionBar();
        return true;
    }
    return super.onCreateOptionsMenu(menu);
}

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    int id = item.getItemId();
    if (id == R.id.action_settings) {
        return true;
    }
    return super.onOptionsItemSelected(item);
}

public static class PlaceholderFragment extends Fragment {
    private static final String ARG_SECTION_NUMBER = "section_number";

    public static PlaceholderFragment newInstance(int sectionNumber) {
        PlaceholderFragment fragment = new PlaceholderFragment();
        Bundle args = new Bundle();
        args.putInt(ARG_SECTION_NUMBER, sectionNumber);
        fragment.setArguments(args);
        return fragment;
    }

    public PlaceholderFragment() {
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
            Bundle savedInstanceState) {
        View rootView = inflater.inflate(R.layout.fragment_login, container, false);
        return rootView;
    }

    @Override
    public void onAttach(Activity activity) {
        super.onAttach(activity);
        ((login) activity).onSectionAttached(
                getArguments().getInt(ARG_SECTION_NUMBER));
    }
}

}

UPDATE: I added the error message as requested in the comment section.

    06-21 19:42:52.109  17625-17625/test.webviewdrawer E/AndroidRuntime﹕ FATAL EXCEPTION: main
Process: test.webviewdrawer, PID: 17625
java.lang.RuntimeException: Unable to start activity ComponentInfo{test.webviewdrawer/test.webviewdrawer.login}: android.view.InflateException: Binary XML file line #28: Error inflating class fragment
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2596)
        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2653)
        at android.app.ActivityThread.access$800(ActivityThread.java:156)
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1355)
        at android.os.Handler.dispatchMessage(Handler.java:102)
        at android.os.Looper.loop(Looper.java:157)
        at android.app.ActivityThread.main(ActivityThread.java:5872)
        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:852)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:668)
        at dalvik.system.NativeStart.main(Native Method)
 Caused by: android.view.InflateException: Binary XML file line #28: Error inflating class fragment
        at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:713)
        at android.view.LayoutInflater.rInflate(LayoutInflater.java:755)
        at android.view.LayoutInflater.inflate(LayoutInflater.java:492)
        at android.view.LayoutInflater.inflate(LayoutInflater.java:397)
        at android.view.LayoutInflater.inflate(LayoutInflater.java:353)
        at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:375)
        at android.app.Activity.setContentView(Activity.java:1997)
        at android.support.v7.app.ActionBarActivity.superSetContentView(ActionBarActivity.java:216)
        at android.support.v7.app.ActionBarActivityDelegateICS.setContentView(ActionBarActivityDelegateICS.java:110)
        at android.support.v7.app.ActionBarActivity.setContentView(ActionBarActivity.java:76)
        at test.webviewdrawer.login.onCreate(login.java:46)
        at android.app.Activity.performCreate(Activity.java:5312)
        at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1111)
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2552)

Post your stack trace, including the actual error message. Then tell us which line in your code the compiler complains about. — MarsAtomic, Jun 21 '14 at 18:38
This may be a duplicate of: http://stackoverflow.com/questions/23653778/nullpointerexception-accessing-views-in-oncreate — indivisible, Jun 21 '14 at 19:00
Might be, but I'm not good enough to see whether it is and if it is, how I can fix that... — user3740505, Jun 21 '14 at 19:15

score 2 · Answer 1 · answered Jun 21 '14 at 21:45

2

There's a typo in your XML layout, at this line:

android:name="test.vwebviewdrawer.NavigationDrawerFragment"

It should be:

android:name="test.webviewdrawer.NavigationDrawerFragment"

instead :-)

answered Jun 21 '14 at 21:45

Darwind

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Why is my Android app crashing with 'Error inflating class fragment'?

1 Answers1