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    <p>You need to use <code>Intents</code> to "switch windows". A "window" is called an <code>Activity</code> in Android and you set the visual content of an <code>Activity</code> using the <code>setContentView()</code> method in the <code>onCreate()</code> call of the <code>Activity</code>.</p> <p>To launch another <code>Activity</code> from your current <code>Activity</code>, simply create an <code>Intent</code> with a few parameters and call <code>startActivity()</code> with that <code>Intent</code>. Here's an example:</p> <pre><code>Intent i = new Intent(this, TheNextActivity.class); startActivity(i); </code></pre> <p>Don't forget to include your second <code>Activity</code> in the Android manifest file. All <code>Activities</code> in your application must be included in that file.</p> <p>Other things to note is that you don't really use <code>System.exit()</code> in Android. Just call <code>finish()</code>. It's advised to let Android manage applications and its resources rather than doing it yourself, but if you want to make sure that your application really is shut down, feel free to use <code>System.exit()</code> anyway. There's also no need for overriding <code>onBackPressed()</code> if you're only calling <code>finish()</code>. That's standard behaviour in Android when you hit the back button.</p> <p>Also, you don't call <code>setContentView()</code> more than once per <code>Activity</code>. You start a new <code>Activity</code> when you need to change the visuals (or use one of the specialized Widgets to switch between layouts.</p> <p>This also explains why you're experiencing your "problem". You may have changed the layout of the <code>Activity</code> using <code>setContentView()</code>, but there's still only one <code>Activity</code> running - when you call <code>finish()</code>, that <code>Activity</code> gets closed. If you had started a second <code>Activity</code> with a different layout, like you're supposed to do, Android would have closed that second <code>Activity</code> and would have returned you to the first.</p>
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    1. COThanks! I'm getting `The constructor Intent(new View.OnClickListener(){}, Class<About>) is undefined` though when I have changed `TheNextActivity` to `About` and added About.java in com.weather.right.now > src > weather.right. I don't know why but do you know why?
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    2. COIt should be `Intent(NameOfTheCurrentActivity.this, NameOfTheSecondActivity.class)`.
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    3. COMany thanks! I'm getting an new error though - `Abstract methods do not specify a body?` on `public void onCreate(Bundle savedInstanceState) {` in the About.java file. See my edit in the first post for more information. Why am I getting this error?
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