Initial version of track search. (still lots of TODOs, but works)

2011-11-20 22:50:59 -02:00
commit bb3a14aac0
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+/*
+ * 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;
+
+import com.google.android.apps.mytracks.util.ApiFeatures;
+import com.google.android.maps.mytracks.R;
+
+import android.app.Activity;
+import android.app.AlertDialog;
+import android.content.Context;
+import android.content.DialogInterface;
+import android.content.SharedPreferences;
+
+/**
+ * Checks with the user if he prefers the metric units or the imperial units.
+ *
+ * @author Sandor Dornbush
+ */
+class CheckUnits {
+  private static final String CHECK_UNITS_PREFERENCE_FILE = "checkunits";
+  private static final String CHECK_UNITS_PREFERENCE_KEY = "checkunits.checked";
+  private static boolean metric = true;
+
+  public static void check(final Context context) {
+    final SharedPreferences checkUnitsSharedPreferences = context.getSharedPreferences(
+        CHECK_UNITS_PREFERENCE_FILE, Activity.MODE_PRIVATE);
+    if (checkUnitsSharedPreferences.getBoolean(CHECK_UNITS_PREFERENCE_KEY, false)) {
+      return;
+    }
+
+    AlertDialog.Builder builder = new AlertDialog.Builder(context);
+    builder.setTitle(context.getString(R.string.preferred_units_title));
+    CharSequence[] items = { context.getString(R.string.preferred_units_metric),
+        context.getString(R.string.preferred_units_imperial) };
+    builder.setSingleChoiceItems(items, 0, new DialogInterface.OnClickListener() {
+      @Override
+      public void onClick(DialogInterface dialog, int which) {
+        if (which == 0) {
+          metric = true;
+        } else {
+          metric = false;
+        }
+      }
+    });
+    builder.setCancelable(true);
+    builder.setPositiveButton(R.string.generic_ok, new DialogInterface.OnClickListener() {
+      public void onClick(DialogInterface dialog, int which) {
+        recordCheckPerformed(checkUnitsSharedPreferences);
+        SharedPreferences useMetricPreferences = context.getSharedPreferences(
+            Constants.SETTINGS_NAME, Activity.MODE_PRIVATE);
+        SharedPreferences.Editor editor = useMetricPreferences.edit();
+        String key = context.getString(R.string.metric_units_key);
+        ApiFeatures.getInstance().getApiAdapter().applyPreferenceChanges(
+            editor.putBoolean(key, metric));
+      }
+    });
+    builder.setOnCancelListener(new DialogInterface.OnCancelListener() {
+      public void onCancel(DialogInterface dialog) {
+        recordCheckPerformed(checkUnitsSharedPreferences);
+      }
+    });
+    builder.show();
+  }
+
+  private static void recordCheckPerformed(SharedPreferences preferences) {
+    ApiFeatures.getInstance().getApiAdapter().applyPreferenceChanges(
+        preferences.edit().putBoolean(CHECK_UNITS_PREFERENCE_KEY, true));
+  }
+
+  private CheckUnits() {}
+}