Improve support for Andrioid M

Checks for and requests runtime location permissions (fixes #2110)
Improved the styling of the location FAB
Removed redudant drawables
Fixed various Java and Android warnings and deprecated functions
A few other tweaks

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

@@ -23,4 +23,6 @@
     </application>
 
     <uses-permission android:name="android.permission.INTERNET" />
+    <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>
+    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
 </manifest>

android/java/MapboxGLAndroidSDKTestApp/src/main/java/com/mapbox/mapboxgl/testapp/MainActivity.java

@@ -1,11 +1,15 @@
 package com.mapbox.mapboxgl.testapp;
 
+import android.Manifest;
+import android.content.pm.PackageManager;
 import android.graphics.Color;
 import android.graphics.PointF;
 import android.location.Location;
 import android.os.Bundle;
 import android.support.design.widget.FloatingActionButton;
 import android.support.design.widget.NavigationView;
+import android.support.v4.app.ActivityCompat;
+import android.support.v4.content.ContextCompat;
 import android.support.v4.view.GravityCompat;
 import android.support.v4.widget.DrawerLayout;
 import android.support.v7.app.ActionBar;
@@ -16,13 +20,10 @@ import android.view.GestureDetector;
 import android.view.MenuItem;
 import android.view.MotionEvent;
 import android.view.View;
-import android.widget.AdapterView;
 import android.widget.TextView;
 import com.crashlytics.android.Crashlytics;
 import com.mapbox.mapboxgl.annotations.MarkerOptions;
-import com.mapbox.mapboxgl.annotations.Polygon;
 import com.mapbox.mapboxgl.annotations.PolygonOptions;
-import com.mapbox.mapboxgl.annotations.Polyline;
 import com.mapbox.mapboxgl.annotations.PolylineOptions;
 import com.mapbox.mapboxgl.geometry.LatLng;
 import com.mapbox.mapboxgl.views.MapView;
@@ -44,6 +45,9 @@ public class MainActivity extends AppCompatActivity {
     private static final String STATE_IS_ANNOTATIONS_ON = "isAnnotationsOn";
     private static final String STATE_SELECTED_STYLE = "selectedStyle";
 
+    // Used for permissions requests
+    private static final int PERMISSIONS_LOCATION = 0;
+
     //
     // Instance members
     //
@@ -78,8 +82,10 @@ public class MainActivity extends AppCompatActivity {
         setSupportActionBar(toolbar);
 
         final ActionBar ab = getSupportActionBar();
-        ab.setHomeAsUpIndicator(R.drawable.ic_menu);
-        ab.setDisplayHomeAsUpEnabled(true);
+        if (ab != null) {
+            ab.setHomeAsUpIndicator(R.drawable.ic_menu);
+            ab.setDisplayHomeAsUpEnabled(true);
+        }
 
         mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
 
@@ -229,6 +235,17 @@ public class MainActivity extends AppCompatActivity {
         }
     }
 
+    @Override
+    public void onRequestPermissionsResult(int requestCode, String permissions[], int[] grantResults) {
+        switch (requestCode) {
+            case PERMISSIONS_LOCATION: {
+                if (grantResults[0] == PackageManager.PERMISSION_GRANTED) {
+                    enableGps();
+                }
+            }
+        }
+    }
+
     private void setupDrawerContent(NavigationView navigationView) {
         navigationView.setNavigationItemSelectedListener(
                 new NavigationView.OnNavigationItemSelectedListener() {
@@ -331,14 +348,24 @@ public class MainActivity extends AppCompatActivity {
      */
     private void toggleGps(boolean enableGps) {
         if (enableGps) {
-            mMapView.setMyLocationEnabled(enableGps);
-            mLocationFAB.setColorFilter(getResources().getColor(R.color.primary));
+            if ((ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) ||
+                    (ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED))
+            {
+                ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.ACCESS_COARSE_LOCATION, Manifest.permission.ACCESS_FINE_LOCATION}, PERMISSIONS_LOCATION);
+            } else {
+                enableGps();
+            }
         } else {
-            mMapView.setMyLocationEnabled(enableGps);
+            mMapView.setMyLocationEnabled(false);
             mLocationFAB.setColorFilter(Color.TRANSPARENT);
         }
     }
 
+    private void enableGps() {
+        mMapView.setMyLocationEnabled(true);
+        mLocationFAB.setColorFilter(ContextCompat.getColor(this, R.color.primary));
+    }
+
     /**
      * Enable / Disable Annotations.
      *
@@ -364,7 +391,6 @@ public class MainActivity extends AppCompatActivity {
 
     private void addMarkers() {
         LatLng backLot = new LatLng(38.649441, -121.369064);
-        MapView map = mMapView;
         mMapView.addMarker(new MarkerOptions()
             .position(backLot)
             .title("Back Lot")
@@ -383,7 +409,7 @@ public class MainActivity extends AppCompatActivity {
             String geojsonStr = Util.loadStringFromAssets(this, "small_line.geojson");
             LatLng[] latLngs = Util.parseGeoJSONCoordinates(geojsonStr);
             MapView map = mMapView;
-            Polyline line = map.addPolyline(new PolylineOptions()
+            map.addPolyline(new PolylineOptions()
                     .add(latLngs)
                     .width(2)
                     .color(Color.RED));
@@ -394,17 +420,16 @@ public class MainActivity extends AppCompatActivity {
     }
 
     private void addPolygon() {
-        String geojsonStr = null;
         try {
-            geojsonStr = Util.loadStringFromAssets(this, "small_poly.geojson");
+            String geojsonStr = Util.loadStringFromAssets(this, "small_poly.geojson");
             LatLng[] latLngs = Util.parseGeoJSONCoordinates(geojsonStr);
             MapView map = mMapView;
-            ArrayList<PolygonOptions> opts = new ArrayList<PolygonOptions>();
+            ArrayList<PolygonOptions> opts = new ArrayList<>();
             opts.add(new PolygonOptions()
                         .add(latLngs)
                         .strokeColor(Color.MAGENTA)
                         .fillColor(Color.BLUE));
-            Polygon polygon = map.addPolygons(opts).get(0);
+            map.addPolygons(opts).get(0);
         } catch (Exception e) {
             Log.e(TAG, "Error adding Polygon: "+ e);
             e.printStackTrace();
@@ -415,76 +440,6 @@ public class MainActivity extends AppCompatActivity {
         mMapView.removeAnnotations();
     }
 
-    // This class handles outdoor class change events
-    private class OutdoorClassSpinnerListener implements AdapterView.OnItemSelectedListener {
-
-        @Override
-        public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
-            ArrayList<String> styleClasses = new ArrayList<>(1);
-
-            switch (position) {
-                // Day
-                case 0:
-                    styleClasses.add("day");
-                    mMapView.setStyleClasses(styleClasses);
-                    break;
-
-                // Night
-                case 1:
-                    styleClasses.add("night");
-                    mMapView.setStyleClasses(styleClasses);
-                    break;
-
-                default:
-                    onNothingSelected(parent);
-                    break;
-            }
-        }
-
-        @Override
-        public void onNothingSelected(AdapterView<?> parent) {
-            mMapView.removeAllStyleClasses();
-        }
-    }
-
-    // This class handles satellite class change events
-    private class SatelliteClassSpinnerListener implements AdapterView.OnItemSelectedListener {
-
-        @Override
-        public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
-            ArrayList<String> styleClasses = new ArrayList<>(2);
-
-            switch (position) {
-                // Labels + Contours
-                case 0:
-                    styleClasses.add("labels");
-                    styleClasses.add("contours");
-                    mMapView.setStyleClasses(styleClasses);
-                    break;
-
-                // Labels Only
-                case 1:
-                    styleClasses.add("labels");
-                    mMapView.setStyleClasses(styleClasses);
-                    break;
-
-                // No Labels
-                case 2:
-                    mMapView.setStyleClasses(styleClasses);
-                    break;
-
-                default:
-                    onNothingSelected(parent);
-                    break;
-            }
-        }
-
-        @Override
-        public void onNothingSelected(AdapterView<?> parent) {
-            mMapView.removeAllStyleClasses();
-        }
-    }
-
     // Called when FPS changes
     private class MyOnFpsChangedListener implements MapView.OnFpsChangedListener {
 

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

@@ -47,13 +47,13 @@
 
                 <android.support.design.widget.FloatingActionButton
                     android:id="@+id/locationFAB"
-                    android:src="@drawable/ic_my_location_white_24dp"
+                    android:src="@drawable/ic_my_location_black_24dp"
                     android:layout_width="wrap_content"
                     android:layout_height="wrap_content"
                     android:layout_gravity="end|bottom"
                     android:layout_margin="@dimen/fab_margin"
+                    app:backgroundTint="@color/white"
                     app:borderWidth="0dp"
-                    app:elevation="0dp"
                     />
                 </android.support.design.widget.CoordinatorLayout>
 

android/java/MapboxGLAndroidSDKTestApp/src/main/res/menu/menu_drawer.xml

@@ -3,7 +3,7 @@
 
     <item
         android:id="@+id/action_debug"
-        android:icon="@drawable/ic_action_about"
+        android:icon="@android:drawable/ic_menu_info_details"
         android:title="@string/action_debug"
         android:checkable="true"
         />
@@ -14,7 +14,7 @@
         android:checkable="true"
         />
     <item android:id="@+id/action_compass"
-          android:icon="@drawable/ic_explore_white_24dp"
+          android:icon="@android:drawable/ic_menu_compass"
           android:title="@string/action_compass"
           android:checkable="true"
           />

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

@@ -4,10 +4,10 @@
     <string name="app_name">Mapbox GL</string>
 
     <string name="action_gps">Toggle GPS location</string>
-    <string name="action_location_none">Toggle Location Bearing Tracking</string>
-    <string name="action_location_follow">Follow</string>
-    <string name="action_location_bearing">Bearing</string>
-    <string name="action_compass">Toggle Compass</string>
+    <string name="action_location_none">Disable tracking</string>
+    <string name="action_location_follow">Use follow tracking mode</string>
+    <string name="action_location_bearing">Use bearing tracking mode tracking</string>
+    <string name="action_compass">Toggle compass</string>
     <string name="action_debug">Toggle debug mode</string>
     <string name="action_point_annotations">Toggle point annotations</string>
 

android/java/MapboxGLAndroidSDKTestApp/src/main/res/values/styles.xml

@@ -7,7 +7,6 @@
         <item name="colorPrimary">@color/primary</item>
         <item name="colorPrimaryDark">@color/primaryDark</item>
         <item name="colorAccent">@color/accent</item>
-        <item name="android:windowBackground">@color/white</item>
     </style>
 
 </resources>