3.12 Add map intent from new menu item

Author: Lyla

app/src/main/java/com/example/android/sunshine/app/MainActivity.java

@@ -16,13 +16,19 @@
 package com.example.android.sunshine.app;
 
 import android.content.Intent;
+import android.content.SharedPreferences;
+import android.net.Uri;
 import android.os.Bundle;
+import android.preference.PreferenceManager;
 import android.support.v7.app.ActionBarActivity;
+import android.util.Log;
 import android.view.Menu;
 import android.view.MenuItem;
 
 public class MainActivity extends ActionBarActivity {
 
+    private final String LOG_TAG = MainActivity.class.getSimpleName();
+
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
@@ -54,6 +60,34 @@ public boolean onOptionsItemSelected(MenuItem item) {
             return true;
         }
 
+        if (id == R.id.action_map) {
+            openPreferredLocationInMap();
+            return true;
+        }
         return super.onOptionsItemSelected(item);
     }
+
+    private void openPreferredLocationInMap() {
+        SharedPreferences sharedPrefs =
+                PreferenceManager.getDefaultSharedPreferences(this);
+        String location = sharedPrefs.getString(
+                getString(R.string.pref_location_key),
+                getString(R.string.pref_location_default));
+
+        // Using the URI scheme for showing a location found on a map.  This super-handy
+        // intent can is detailed in the "Common Intents" page of Android's developer site:
+        // http://developer.android.com/guide/components/intents-common.html#Maps
+        Uri geoLocation = Uri.parse("geo:0,0?").buildUpon()
+                .appendQueryParameter("q", location)
+                .build();
+
+        Intent intent = new Intent(Intent.ACTION_VIEW);
+        intent.setData(geoLocation);
+
+        if (intent.resolveActivity(getPackageManager()) != null) {
+            startActivity(intent);
+        } else {
+            Log.d(LOG_TAG, "Couldn't call " + location + ", no receiving apps installed!");
+        }
+    }
 }

app/src/main/res/menu/detail.xml

@@ -1,7 +1,9 @@
 <menu xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto"
     xmlns:tools="http://schemas.android.com/tools"
-    tools:context="com.example.android.sunshine.app.DetailActivity">
-    <item android:id="@+id/action_settings" android:title="@string/action_settings"
-        android:orderInCategory="100" app:showAsAction="never" />
+    tools:context="com.example.android.sunshine.app.DetailActivity" >
+    <item android:id="@+id/action_settings"
+        android:title="@string/action_settings"
+        android:orderInCategory="100"
+        app:showAsAction="never" />
 </menu>

app/src/main/res/menu/main.xml

@@ -1,6 +1,11 @@
 <menu xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto"
     xmlns:tools="http://schemas.android.com/tools" tools:context=".MainActivity">
-    <item android:id="@+id/action_settings" android:title="@string/action_settings"
-        android:orderInCategory="100" app:showAsAction="never" />
+    <item android:id="@+id/action_settings"
+        android:title="@string/action_settings"
+        android:orderInCategory="100"
+        app:showAsAction="never" />
+    <item android:id="@+id/action_map"
+        android:title="@string/action_map"
+        app:showAsAction="never" />
 </menu>

app/src/main/res/values/strings.xml

@@ -13,6 +13,7 @@
          typically from the action bar.  The ActionBar is limited real estate, so shorter is better.
     -->
     <string name="action_settings">Settings</string>
+    <string name="action_map">Map Location</string>
 
     <!-- Menu label to fetch updated weather info from the server -->
     <string name="action_refresh" translatable="false">Refresh</string>