OnTrimMemory callback added

Author: chris-carneiro

app/src/main/java/net/opencurlybraces/android/projects/androidpractices/MainActivity.java

@@ -1,5 +1,6 @@
 package net.opencurlybraces.android.projects.androidpractices;
 
+import android.content.ComponentCallbacks2;
 import android.support.v7.app.ActionBarActivity;
 import android.os.Bundle;
 import android.view.Menu;
@@ -36,4 +37,15 @@ public boolean onOptionsItemSelected(MenuItem item) {
 
         return super.onOptionsItemSelected(item);
     }
+
+    @Override
+    public void onTrimMemory(int level) {
+        super.onTrimMemory(level);
+
+        // release your UI resources when you receive onTrimMemory(TRIM_MEMORY_UI_HIDDEN).
+
+        if (level == ComponentCallbacks2.TRIM_MEMORY_UI_HIDDEN) {
+            //release UI Resources here
+        }
+    }
 }