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Android

Posted by Eugene Luebker
Eugene Luebker
1,959 Points

Unable to open WebView after rewriting AndroidManifest.xml

I accidentally deleted my android manifest code! I tried to rewrite it, but now my app crashes when I try to display the WebView by clicking on a link in the ListView. Am I missing something in AndroidManifest.xml? Here it is:

<?xml version="1.0" encoding="UTF-8"?>
<manifest android:versionName="1.0" 
android:versionCode="1" 
package="com.eugene.blogreader" 
xmlns:android="http://schemas.android.com/apk/res/android">
<uses-sdk android:targetSdkVersion="17" android:minSdkVersion="8"/>
<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
-<application android:theme="@style/AppTheme" 
android:label="@string/title_activity_web_view" 
android:icon="@drawable/ic_launcher" 
android:allowBackup="true">
-<activity android:name="com.eugene.blogreader.MainListActivity" 
                android:label="@string/app_name">
        -<intent-filter>
            <action android:name="android.intent.action.MAIN"/>
            <category android:name="android.intent.category.LAUNCHER"/>
        </intent-filter>
    </activity>
    -<activity android:name="com.eugene.blogreader.WebViewActivity"
                android:label="@string/title_activity_web_view"
    </activity>
</application>
</manifest>

This is what LogCat displays:

06-26 20:20:17.712: E/AndroidRuntime(684): FATAL EXCEPTION: main

06-26 20:20:17.712: E/AndroidRuntime(684): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.eugene.blogreader/com.eugene.blogreader.WebViewActivity}: java.lang.NullPointerException

06-26 20:20:17.712: E/AndroidRuntime(684): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2059)

1 Answer

Ernest Grzybowski
Ernest Grzybowski
Treehouse Project Reviewer

First, did your application run before you deleted the manifest?

Second, use this code for your manifest

<?xml version="1.0" encoding="UTF-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.eugene.blogreader"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="17" />

    <uses-permission android:name="android.permission.INTERNET" />
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/title_activity_web_view"
        android:theme="@style/AppTheme" >
        <activity
            android:name="com.eugene.blogreader.MainListActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <activity
            android:name="com.eugene.blogreader.WebViewActivity"
            android:label="@string/title_activity_web_view" >
        </activity>
    </application>

</manifest>

Let me know. Thanks!

Eugene Luebker
Eugene Luebker
1,959 Points

I think so. I guess there was something wrong with the way the WebView activity was being referenced, because I made a new activity with the exact same code and it works just fine. Thanks for your help and speedy reply!