Fixing periodic task restarting.

2010-11-21 20:45:25 -08:00
commit e7479c8a93
267 changed files with 39485 additions and 0 deletions
@@ -0,0 +1,119 @@
+/*
+ * 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 com.google.android.apps.mytracks.MyTracksConstants;
+
+import android.os.Build;
+import android.util.Log;
+
+/**
+ * Utility class for determining if newer-API features are available on the
+ * current device.
+ *
+ * @author Rodrigo Damazio
+ */
+public class ApiFeatures {
+
+  /**
+   * The API level of the Android version we're being run under.
+   */
+  public static final int ANDROID_API_LEVEL = Integer.parseInt(
+      Build.VERSION.SDK);
+  
+  private static ApiFeatures instance;
+  
+  /**
+   * The API platform adapter supported by this system.
+   */
+  private ApiPlatformAdapter apiPlatformAdapter;
+
+  /**
+   * Returns the singleton instance of this class.
+   */
+  public static ApiFeatures getInstance() {
+    if (instance == null) {
+      instance = new ApiFeatures();
+    }
+    return instance;
+  }
+
+  /**
+   * Injects a specific singleton instance, to be used for unit tests.
+   */
+  public static void injectInstance(ApiFeatures instance) {
+    ApiFeatures.instance = instance;
+  }
+
+  /**
+   * Allow subclasses for mocking, but no direct instantiation.
+   */
+  protected ApiFeatures() {
+    if (getApiLevel() >= 5) {
+      try {
+        Class<?> clazz = Class.forName(
+            "com.google.android.apps.mytracks.util.EclairPlatformAdapter");
+        apiPlatformAdapter = (ApiPlatformAdapter) clazz.newInstance();
+      } catch (Exception e) {
+        Log.i(MyTracksConstants.TAG, "ApiFeatures: Unable to instantiate Eclair"
+            + " platform adapter", e);
+      }
+    }
+    if (apiPlatformAdapter == null) {
+      Log.i(MyTracksConstants.TAG,
+          "ApiFeatures: Using default platform adapter");
+      // Cupcake adapter is always supported, so it's safe to do static linkage.
+      apiPlatformAdapter = new CupcakePlatformAdapter();
+    }
+  }
+  
+  public ApiPlatformAdapter getApiPlatformAdapter() {
+    return apiPlatformAdapter;
+  }
+
+  /**
+   * Returns whether cloud backup (a.k.a. Froyo backup) is available.
+   */
+  public boolean hasBackup() {
+    return getApiLevel() >= 8;
+  }
+
+  /**
+   * Returns whether text-to-speech is available.
+   */
+  public boolean hasTextToSpeech() {
+    if (getApiLevel() < 4) return false;
+
+    try {
+      Class.forName("android.speech.tts.TextToSpeech");
+    } catch (ClassNotFoundException ex) {
+      return false;
+    } catch (LinkageError er) {
+      return false;
+    }
+
+    return true;
+  }
+
+  public boolean hasModernSignalStrength() {
+    return getApiLevel() >= 7;
+  }
+  
+  // Visible for testing.
+  protected int getApiLevel() {
+    return ANDROID_API_LEVEL;
+  }
+}