Add API demo of a heavy-weight application.

Change-Id: I15e2d1c766af8aa7a62beed3069b8d128338ca11

samples/HeavyWeight/src/com/example/android/heavyweight/HeavyWeight.java

@@ -0,0 +1,45 @@
+/*
+ * Copyright (C) 2010 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.example.android.heavyweight;
+
+import android.app.Activity;
+import android.os.Bundle;
+import android.view.View;
+import android.view.View.OnClickListener;
+import android.widget.Button;
+
+/**
+ * Basic "heavy-weight" application, which will not be killed by Android
+ * while it is in the background.
+ */
+public class HeavyWeight extends Activity {
+    @Override
+    public void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.heavy_weight);
+        
+        Button button = (Button)findViewById(R.id.stop);
+        button.setOnClickListener(mStopListener);
+    }
+    
+    private OnClickListener mStopListener = new OnClickListener() {
+        public void onClick(View v) {
+            finish();
+        }
+    };
+}
+