Add gps button

android/java/app/src/main/AndroidManifest.xml

@@ -1,19 +1,21 @@
 <?xml version="1.0" encoding="utf-8"?>
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
-    package="com.mapbox.mapboxgl.app" >
+    package="com.mapbox.mapboxgl.app">
+
+    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
+    <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
 
     <application
         android:allowBackup="false"
         android:icon="@drawable/icon_burned"
         android:label="@string/app_name"
-        android:theme="@style/AppTheme" >
+        android:theme="@style/AppTheme">
         <activity
             android:name="com.mapbox.mapboxgl.app.MainActivity"
             android:label="@string/app_name"
-            android:configChanges="keyboard|keyboardHidden|orientation|screenSize|smallestScreenSize" >
+            android:configChanges="keyboard|keyboardHidden|orientation|screenSize|smallestScreenSize">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
-
                 <category android:name="android.intent.category.LAUNCHER" />
             </intent-filter>
         </activity>

android/java/app/src/main/java/com/mapbox/mapboxgl/app/MainActivity.java

@@ -1,16 +1,22 @@
 package com.mapbox.mapboxgl.app;
 
+import android.location.Criteria;
+import android.location.Location;
+import android.location.LocationListener;
+import android.location.LocationManager;
 import android.os.Bundle;
-import android.support.v7.app.ActionBar;
 import android.support.v7.app.ActionBarActivity;
 import android.support.v7.widget.Toolbar;
 import android.util.Log;
+import android.view.Menu;
+import android.view.MenuInflater;
+import android.view.MenuItem;
 import android.view.View;
 import android.widget.AdapterView;
 import android.widget.ArrayAdapter;
 import android.widget.Spinner;
 
-import com.mapbox.mapboxgl.lib.MapView;
+import com.mapbox.mapboxgl.lib.LonLatZoom;
 
 public class MainActivity extends ActionBarActivity {
 
@@ -42,18 +48,70 @@ public class MainActivity extends ActionBarActivity {
         setContentView(R.layout.activity_main);
         mMapFragment = (MapFragment)getSupportFragmentManager().findFragmentById(R.id.fragment_map);
 
-        // TODO move to layout file and save state
-        // Add the spinner to select map styles
-        Spinner styleSpinner = (Spinner)findViewById(R.id.spinner_style);
-        ArrayAdapter styleAdapter = ArrayAdapter.createFromResource(this,
-                R.array.style_list, android.R.layout.simple_spinner_dropdown_item);
-        styleSpinner.setAdapter(styleAdapter);
-        styleSpinner.setOnItemSelectedListener(new StyleSpinnerListener());
-
         // Add a toolbar as the action bar
         Toolbar mainToolbar = (Toolbar)findViewById(R.id.toolbar_main);
         setSupportActionBar(mainToolbar);
         getSupportActionBar().setDisplayShowTitleEnabled(false);
+
+        // TODO move to layout file and save state
+        // Add the spinner to select map styles
+        Spinner styleSpinner = (Spinner)findViewById(R.id.spinner_style);
+        ArrayAdapter styleAdapter = ArrayAdapter.createFromResource(getSupportActionBar().getThemedContext(),
+                R.array.style_list, android.R.layout.simple_spinner_dropdown_item);
+        styleSpinner.setAdapter(styleAdapter);
+        styleSpinner.setOnItemSelectedListener(new StyleSpinnerListener());
+    }
+
+    // Adds items to the action bar menu
+    @Override
+    public boolean onCreateOptionsMenu(Menu menu) {
+        MenuInflater inflater = getMenuInflater();
+        inflater.inflate(R.menu.menu_main, menu);
+        return super.onCreateOptionsMenu(menu);
+    }
+
+    @Override
+    public boolean onOptionsItemSelected(MenuItem item) {
+        // Handle presses on the action bar items
+        switch (item.getItemId()) {
+            case R.id.action_gps:
+                // Get a GPS position
+                LocationManager locationManager = (LocationManager)getSystemService(getApplicationContext().LOCATION_SERVICE);
+                String provider = locationManager.getBestProvider(new Criteria(), true);
+                Location location = locationManager.getLastKnownLocation(provider);
+                LonLatZoom coordinate = new LonLatZoom(location.getLongitude(), location.getLatitude(), 15);
+                mMapFragment.getMap().setCenterCoordinate(coordinate, true);
+                locationManager.requestSingleUpdate(provider, new MyLocationListener(), null);
+                return true;
+
+            default:
+                return super.onOptionsItemSelected(item);
+        }
+    }
+
+    // This class handles location events
+    private class MyLocationListener implements LocationListener {
+
+        @Override
+        public void onLocationChanged(Location location) {
+            LonLatZoom coordinate = new LonLatZoom(location.getLongitude(), location.getLatitude(), 15);
+            mMapFragment.getMap().setCenterCoordinate(coordinate, true);
+        }
+
+        @Override
+        public void onStatusChanged(String provider, int status, Bundle extras) {
+            // Do nothing
+        }
+
+        @Override
+        public void onProviderEnabled(String provider) {
+            // Do nothing
+        }
+
+        @Override
+        public void onProviderDisabled(String provider) {
+            // Do nothing
+        }
     }
 
     // This class handles navigation events

android/java/app/src/main/res/layout/activity_main.xml

@@ -1,22 +1,22 @@
 <?xml version="1.0" encoding="utf-8"?>
-<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     android:orientation="vertical">
 
     <android.support.v7.widget.Toolbar
         android:id="@+id/toolbar_main"
-        android:layout_height="?attr/actionBarSize"
+        android:layout_height="wrap_content"
         android:layout_width="match_parent"
+        android:minHeight="?attr/actionBarSize"
         android:background="?attr/colorPrimary">
-
         <Spinner
             android:id="@+id/spinner_style"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content" />
     </android.support.v7.widget.Toolbar>
 
-    <fragment xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools"
+    <fragment
         tools:context="${packageName}.${activityClass}"
         android:name="com.mapbox.mapboxgl.app.MapFragment"
         android:id="@+id/fragment_map"

android/java/app/src/main/res/menu/menu_main.xml

@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="utf-8"?>
+<menu xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto">
+    <item android:id="@+id/action_gps"
+        android:icon="@drawable/ic_action_location_found"
+        android:title="@string/action_gps"
+        app:showAsAction="ifRoom" />
+</menu>

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

@@ -3,6 +3,8 @@
 
     <string name="app_name">Mapbox GL</string>
 
+    <string name="action_gps">Go to GPS location</string>
+
     <string-array name="style_list">
         <item>Bright</item>
         <item>Basic</item>