High memory usage on Android Application
<p>I have a little application, this application has seven activities, basically 6 are layouts with images and one is a MapActivity, among of 5 layouts one has a ArrayList of a internal class and each time that I use my application the memory grows to 50mb, 70mb, 111mb... I tried to call Garbage Collector but I didn't receive the expected result.</p>

<pre><code>public class GC 
{    
    public static final Runtime runtime = Runtime.getRuntime();

    public static void Free()
    {
        runtime.gc();
    }
}
</code></pre>
