6402 update offline metadata android (#6456)

* [android] - update offline metadata jni integration

* extract offline utils for reuse

* add test activity for update metadata

* fix requested signature changes

1 files changed, 36 insertions, 0 deletions

diff --git a/platform/android/MapboxGLAndroidSDKTestApp/src/main/java/com/mapbox/mapboxsdk/testapp/utils/OfflineUtils.java b/platform/android/MapboxGLAndroidSDKTestApp/src/main/java/com/mapbox/mapboxsdk/testapp/utils/OfflineUtils.java
new file mode 100644
index 0000000000..ee4ae039ee
--- /dev/null
+++ b/platform/android/MapboxGLAndroidSDKTestApp/src/main/java/com/mapbox/mapboxsdk/testapp/utils/OfflineUtils.java
@@ -0,0 +1,36 @@
+package com.mapbox.mapboxsdk.testapp.utils;
+
+import android.support.annotation.NonNull;
+import android.util.Log;
+
+import org.json.JSONObject;
+
+import static com.mapbox.mapboxsdk.testapp.activity.offline.OfflineActivity.JSON_CHARSET;
+import static com.mapbox.mapboxsdk.testapp.activity.offline.OfflineActivity.JSON_FIELD_REGION_NAME;
+
+public class OfflineUtils {
+
+    public static String convertRegionName(@NonNull  byte[] metadata) {
+        try {
+            String json = new String(metadata, JSON_CHARSET);
+            JSONObject jsonObject = new JSONObject(json);
+            return jsonObject.getString(JSON_FIELD_REGION_NAME);
+        } catch (Exception exception) {
+            return null;
+        }
+    }
+
+    public static byte[] convertRegionName(String regionName) {
+        byte[] metadata = null;
+        try {
+            JSONObject jsonObject = new JSONObject();
+            jsonObject.put(JSON_FIELD_REGION_NAME, regionName);
+            String json = jsonObject.toString();
+            metadata = json.getBytes(JSON_CHARSET);
+        } catch (Exception exception) {
+            Log.e("OfflineUtils", "Failed to encode metadata: " + exception.getMessage());
+        }
+        return metadata;
+    }
+    
+}