Provide a fallback method to load the native library (#10154)

* provide a fallback method to load the native library

* move context call inside loader to avoid changing method signature

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

@@ -1,15 +1,41 @@
 package com.mapbox.mapboxsdk;
 
+import android.content.Context;
+
+import java.io.File;
+
+import timber.log.Timber;
+
 /**
  * Centralises the knowledge about "mapbox-gl" library loading.
  */
 public class LibraryLoader {
 
+ private static final String LIBRARY_NAME = "libmapbox-gl.so";
+
  /**
  * Loads "libmapbox-gl.so" native shared library.
  */
  public static void load() {
- System.loadLibrary("mapbox-gl");
+ try {
+ System.loadLibrary("mapbox-gl");
+ } catch (UnsatisfiedLinkError error) {
+ Context context = Mapbox.getApplicationContext();
+ if (context != null) {
+ Timber.d("Loading %s from internal storage.", LIBRARY_NAME);
+ System.load(getLibraryLocation(context).getAbsolutePath());
+ }
+ }
  }
 
+ /**
+ * Returns a file in the app internal storage that may contain a locally cached copy
+ * of the Mapbox native library.
+ *
+ * @param context The application context
+ * @return a file object
+ */
+ public static File getLibraryLocation(Context context) {
+ return new File(context.getFilesDir(), LIBRARY_NAME);
+ }
 }