add app shortcut for favorites view

fixes #152

app/src/main/AndroidManifest.xml

@@ -256,6 +256,10 @@
                 <category android:name="android.intent.category.DEFAULT" />
                 <category android:name="android.intent.category.BROWSABLE" />
             </intent-filter>
+
+            <meta-data
+                android:name="android.app.shortcuts"
+                android:resource="@xml/shortcuts" />
         </activity>
 
         <!-- Override services of the com.mapzen.android.lost library with exported:false

app/src/main/java/net/vonforst/evmap/MapsActivity.kt

@@ -40,6 +40,7 @@ const val REQUEST_LOCATION_PERMISSION = 1
 const val EXTRA_CHARGER_ID = "chargerId"
 const val EXTRA_LAT = "lat"
 const val EXTRA_LON = "lon"
+const val EXTRA_FAVORITES = "favorites"
 
 class MapsActivity : AppCompatActivity(),
     PreferenceFragmentCompat.OnPreferenceStartFragmentCallback {
@@ -115,6 +116,8 @@ class MapsActivity : AppCompatActivity(),
             navController.graph = navGraph
             return
         } else {
+            navGraph.setStartDestination(R.id.map)
+            navController.setGraph(navGraph, MapFragmentArgs(appStart = true).toBundle())
             var deepLink: PendingIntent? = null
 
             if (intent?.scheme == "geo") {
@@ -158,15 +161,13 @@ class MapsActivity : AppCompatActivity(),
                         ).toBundle()
                     )
                     .createPendingIntent()
+            } else if (intent.hasExtra(EXTRA_FAVORITES)) {
+                deepLink = navController.createDeepLink()
+                    .setDestination(R.id.favs)
+                    .createPendingIntent()
             }
 
-            navGraph.setStartDestination(R.id.map)
-            if (deepLink != null) {
-                navController.graph = navGraph
-                deepLink.send()
-            } else {
-                navController.setGraph(navGraph, MapFragmentArgs(appStart = true).toBundle())
-            }
+            deepLink?.send()
         }
     }
 

app/src/main/res/drawable/ic_shortcut_fav.xml

@@ -0,0 +1,9 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="24"
+    android:viewportHeight="24">
+    <path
+        android:fillColor="@color/colorSecondary"
+        android:pathData="M12,21.35l-1.45,-1.32C5.4,15.36 2,12.28 2,8.5 2,5.42 4.42,3 7.5,3c1.74,0 3.41,0.81 4.5,2.09C13.09,3.81 14.76,3 16.5,3 19.58,3 22,5.42 22,8.5c0,3.78 -3.4,6.86 -8.55,11.54L12,21.35z" />
+</vector>

app/src/main/res/xml/shortcuts.xml

@@ -0,0 +1,24 @@
+<?xml version="1.0" encoding="utf-8"?>
+<shortcuts xmlns:android="http://schemas.android.com/apk/res/android">
+    <shortcut
+        android:shortcutId="favs"
+        android:icon="@drawable/ic_shortcut_fav"
+        android:shortcutShortLabel="@string/menu_favs">
+        <!-- Note: the targetPackage is hardcoded here, because templates or string resources don't
+             work. This means that the shortcut will not work if the package name changes
+             (e.g. in the debug version). -->
+        <intent
+            android:action="android.intent.action.VIEW"
+            android:targetPackage="net.vonforst.evmap"
+            android:targetClass="net.vonforst.evmap.MapsActivity">
+            <extra
+                android:name="favorites"
+                android:value="true" />
+        </intent>
+        <capability-binding android:key="actions.intent.OPEN_APP_FEATURE">
+            <parameter-binding
+                android:value="@string/menu_favs"
+                android:key="feature" />
+        </capability-binding>
+    </shortcut>
+</shortcuts>