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Getting ActivityNotFoundException even though it should exist
<uses-sdk android:minSdkVersion="7" />

<application
    android:icon="@drawable/ic_launcher"
    android:label="@string/app_name" >
    <activity
        android:name=".ListsActivity"
        android:label="@string/app_name"
        android:theme="@android:style/Theme.NoTitleBar">
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>

    <activity android:name=".ListActivity" ></activity>
</application>

package org.softnux.android.lists;

import android.app.Activity;
import android.app.ListActivity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;


public class ListsActivity extends Activity
{
    @Override
    public void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.lists);

        Button intentTestButton = (Button) findViewById(R.id.intentTestButton);

        intentTestButton.setOnClickListener(new Button.OnClickListener()
        {

            public void onClick(View v)
            {
                Intent showListViewIntent = new Intent(ListsActivity.this,
                        ListActivity.class);
                startActivity(showListViewIntent);
            }

        });
    }
}

package org.softnux.android.lists;

import android.app.Activity;
import android.os.Bundle;

public class ListActivity extends Activity
{
    @Override
    public void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.list);
    }

}

Intent showListViewIntent = new Intent(ListsActivity.this, ListActivity.class);
startActivity(showListViewIntent);

import android.app.ListActivity;