android ClassNotFoundException: Didn't find class

Question

    02-28 01:49:27.741: E/AndroidRuntime(23024): FATAL EXCEPTION: main
    02-28 01:49:27.741: E/AndroidRuntime(23024): java.lang.RuntimeException: Unable to instantiate         


        

Answer 1

You do have a package mismatch error, it needs to be:

package="com.haber29.android.reader"

Since reader is the next subpackage and this is the subpackage that contains the Activities.

And don't forget, you can specify the fully qualified name for each Activity, to prevent confusion:

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.haber29.android"
    android:versionCode="3"
    android:versionName="1.0" >
    <uses-sdk android:minSdkVersion="7" />
    <uses-permission android:name="android.permission.INTERNET"/>
    <application
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name">
        <activity
            android:name="com.haber29.android.reader.ITCutiesReaderAppActivity"
            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.haber29.android.reader.ItemDescriptionActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
            </intent-filter>
            </activity>
    </application>
</manifest>

Answer 2

I have the same problem today，because my library include the android-support-v4.jar not matching with my demo. I deleted the library's android-support-v4.jar and copied my demo's jar putting it in my library and it started to work.

Answer 3

In my case my antivirus software (Avira for Mac) grabs dex files after every build I make and puts them into quarantine. After I stopped Avira, my project builds and runs.