Add API demo for Activity.finishAffinity().

Also fix text on some of the existing demos to use the nice
larger font.

Change-Id: I90d3815cd47cda08217cfc6307d64942f6750ae2

samples/ApiDemos/src/com/example/android/apis/app/ActivityRecreate.java

@@ -17,12 +17,9 @@
 package com.example.android.apis.app;
 
 import com.example.android.apis.R;
-import com.example.android.apis.app.LocalServiceActivities.Controller;
 
 import android.app.Activity;
-import android.content.Intent;
 import android.os.Bundle;
-import android.util.Log;
 import android.view.View;
 import android.view.View.OnClickListener;
 import android.widget.Button;

samples/ApiDemos/src/com/example/android/apis/app/FinishAffinity.java

@@ -0,0 +1,62 @@
+/*
+ * Copyright (C) 2012 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.apis.app;
+
+import com.example.android.apis.R;
+
+import android.app.Activity;
+import android.content.ComponentName;
+import android.content.Intent;
+import android.os.Bundle;
+import android.view.View;
+import android.view.View.OnClickListener;
+import android.widget.Button;
+import android.widget.TextView;
+
+public class FinishAffinity extends Activity {
+    int mNesting;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+
+        setContentView(R.layout.activity_finish_affinity);
+
+        mNesting = getIntent().getIntExtra("nesting", 1);
+        ((TextView)findViewById(R.id.seq)).setText("Current nesting: " + mNesting);
+
+        // Watch for button clicks.
+        Button button = (Button)findViewById(R.id.nest);
+        button.setOnClickListener(mNestListener);
+        button = (Button)findViewById(R.id.finish);
+        button.setOnClickListener(mFinishListener);
+    }
+
+    private OnClickListener mNestListener = new OnClickListener() {
+        public void onClick(View v) {
+            Intent intent = new Intent(FinishAffinity.this, FinishAffinity.class);
+            intent.putExtra("nesting", mNesting+1);
+            startActivity(intent);
+        }
+    };
+
+    private OnClickListener mFinishListener = new OnClickListener() {
+        public void onClick(View v) {
+            finishAffinity();
+        }
+    };
+}