Check for network connectivity before requesting resources

platform/android/MapboxGLAndroidSDK/src/main/java/com/mapbox/mapboxsdk/MapboxAccountManager.java

@@ -1,7 +1,10 @@
 package com.mapbox.mapboxsdk;
 
 import android.content.Context;
+import android.net.ConnectivityManager;
+import android.net.NetworkInfo;
 import android.text.TextUtils;
+import android.util.Log;
 
 import com.mapbox.mapboxsdk.constants.MapboxConstants;
 import com.mapbox.mapboxsdk.exceptions.InvalidAccessTokenException;
@@ -40,6 +43,7 @@ public static MapboxAccountManager start(Context context, String accessToken) {
         if (mapboxAccountManager == null) {
             mapboxAccountManager = new MapboxAccountManager(context, accessToken);
         }
+
         MapboxEventManager eventManager = MapboxEventManager.getMapboxEventManager();
         eventManager.initialize(mapboxAccountManager.applicationContext, mapboxAccountManager.accessToken);
         return mapboxAccountManager;
@@ -79,4 +83,19 @@ public static void validateAccessToken(String accessToken) throws InvalidAccessT
             throw new InvalidAccessTokenException();
         }
     }
+
+    /**
+     * Determines whether we have an Internet connection available. Please do not rely on this
+     * method in your apps, this method is used internally by the SDK.
+     *
+     * @return true if there is an Internet connection, false otherwise
+     */
+    public boolean isConnected() {
+        ConnectivityManager cm = (ConnectivityManager) applicationContext.getSystemService(Context.CONNECTIVITY_SERVICE);
+        NetworkInfo activeNetwork = cm.getActiveNetworkInfo();
+        boolean result = (activeNetwork != null && activeNetwork.isConnected());
+        Log.v("IOUtils", "isConnected result = " + result);
+        return result;
+    }
+
 }

platform/android/MapboxGLAndroidSDK/src/main/java/com/mapbox/mapboxsdk/http/HTTPRequest.java

@@ -3,10 +3,12 @@
 import android.text.TextUtils;
 import android.util.Log;
 
+import com.mapbox.mapboxsdk.MapboxAccountManager;
 import com.mapbox.mapboxsdk.constants.MapboxConstants;
 
 import java.io.IOException;
 import java.io.InterruptedIOException;
+import java.net.NoRouteToHostException;
 import java.net.ProtocolException;
 import java.net.SocketException;
 import java.net.UnknownHostException;
@@ -47,6 +49,11 @@ private HTTPRequest(long nativePtr, String resourceUrl, String userAgent, String
         mNativePtr = nativePtr;
 
         try {
+            // Don't try a request if we aren't connected
+            if (!MapboxAccountManager.getInstance().isConnected()) {
+                throw new NoRouteToHostException("No Internet connection available.");
+            }
+
             HttpUrl httpUrl = HttpUrl.parse(resourceUrl);
             final String host = httpUrl.host().toLowerCase(MapboxConstants.MAPBOX_LOCALE);
             if (host.equals("mapbox.com") || host.endsWith(".mapbox.com")) {
@@ -73,7 +80,10 @@ private HTTPRequest(long nativePtr, String resourceUrl, String userAgent, String
     }
 
     public void cancel() {
-        mCall.cancel();
+        // mCall can be null if the constructor gets aborted (e.g, under a NoRouteToHostException).
+        if (mCall != null) {
+            mCall.cancel();
+        }
 
         // TODO: We need a lock here because we can try
         // to cancel at the same time the request is getting
@@ -124,7 +134,7 @@ private void onFailure(Exception e) {
         Log.w(LOG_TAG, String.format("[HTTP] Request could not be executed: %s", e.getMessage()));
 
         int type = PERMANENT_ERROR;
-        if ((e instanceof UnknownHostException) || (e instanceof SocketException) || (e instanceof ProtocolException) || (e instanceof SSLException)) {
+        if ((e instanceof NoRouteToHostException) || (e instanceof UnknownHostException) || (e instanceof SocketException) || (e instanceof ProtocolException) || (e instanceof SSLException)) {
             type = CONNECTION_ERROR;
         } else if ((e instanceof InterruptedIOException)) {
             type = TEMPORARY_ERROR;

platform/android/MapboxGLAndroidSDK/src/main/java/com/mapbox/mapboxsdk/telemetry/MapboxEventManager.java

@@ -11,8 +11,6 @@
 import android.content.pm.ServiceInfo;
 import android.content.res.Configuration;
 import android.location.Location;
-import android.net.ConnectivityManager;
-import android.net.NetworkInfo;
 import android.net.wifi.WifiInfo;
 import android.net.wifi.WifiManager;
 import android.os.AsyncTask;
@@ -25,14 +23,18 @@
 import android.util.DisplayMetrics;
 import android.util.Log;
 import android.view.WindowManager;
+
 import com.mapbox.mapboxsdk.BuildConfig;
+import com.mapbox.mapboxsdk.MapboxAccountManager;
 import com.mapbox.mapboxsdk.constants.GeoConstants;
 import com.mapbox.mapboxsdk.constants.MapboxConstants;
 import com.mapbox.mapboxsdk.exceptions.TelemetryServiceNotConfiguredException;
 import com.mapbox.mapboxsdk.location.LocationServices;
 import com.mapbox.mapboxsdk.utils.MathUtils;
+
 import org.json.JSONArray;
 import org.json.JSONObject;
+
 import java.security.MessageDigest;
 import java.security.NoSuchAlgorithmException;
 import java.text.SimpleDateFormat;
@@ -43,6 +45,7 @@
 import java.util.TimerTask;
 import java.util.UUID;
 import java.util.Vector;
+
 import okhttp3.CertificatePinner;
 import okhttp3.MediaType;
 import okhttp3.OkHttpClient;
@@ -629,9 +632,7 @@ protected Void doInBackground(Void... voids) {
             }
 
             // Check for NetworkConnectivity
-            ConnectivityManager cm = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
-            NetworkInfo networkInfo = cm.getActiveNetworkInfo();
-            if (networkInfo == null || !networkInfo.isConnected()) {
+            if (!MapboxAccountManager.getInstance().isConnected()) {
                 Log.w(TAG, "Not connected to network, so empty events cache and return without attempting to send events");
                 // Make sure that events don't pile up when Offline
                 // and thus impact available memory over time.