Clean up SendDialog.java

mytracks_send_to_google.xml
- remove unused ids.
- rename id variables.
- set textSize to 18dip to fit "Google Fusion Tables".
- set margin in ScrollView because its height is 0dip
  and settings margins in its children have no effect.

SendDialog.java
- use ApiFeature.applyPreferenceChanges to commit preference changes.
- set myMapsGroup View to GONE when 'Google My Maps' is not checked.
- use Context.MODE_PRIVATE.
- onStop, call super.onStop first.

MyTracksTest/src/com/google/android/apps/mytracks/util/ApiFeaturesTest.java

@@ -0,0 +1,62 @@
+/*
+ * Copyright 2010 Google Inc.
+ *
+ * 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.google.android.apps.mytracks.util;
+
+import junit.framework.TestCase;
+
+/**
+ * Tests the API feature detection code in {@link ApiFeatures}.
+ * This test requires Froyo+ to run.
+ *
+ * @author Rodrigo Damazio
+ */
+public class ApiFeaturesTest extends TestCase {
+
+  private TestableApiFeatures features;
+
+  private class TestableApiFeatures extends ApiFeatures {
+    private int apiLevel;
+
+    public void setApiLevel(int apiLevel) {
+      this.apiLevel = apiLevel;
+    }
+
+    @Override
+    protected int getApiLevel() {
+      return apiLevel;
+    }
+  }
+  
+  @Override
+  protected void setUp() throws Exception {
+    super.setUp();
+
+    features = new TestableApiFeatures();
+  }
+
+  public void testHasTextToSpeech() {
+    features.setApiLevel(3);
+    assertFalse(features.hasTextToSpeech());
+    for (int i = 4; i <= 8; i++) {
+      features.setApiLevel(i);
+      assertTrue(features.hasTextToSpeech());
+    }
+  }
+
+  public void testGetApiAdapter() {
+    assertNotNull(features.getApiAdapter());
+  }
+}