Android fixes

base/sources/backends/android_http_request.c

@@ -17,6 +17,13 @@ void android_http_request(const char *url, const char *path, const char *data, i
 
     jstring jstr = (*env)->NewStringUTF(env, url);
     jbyteArray bytes_array = (jbyteArray)((*env)->CallStaticObjectMethod(env, activityClass, (*env)->GetStaticMethodID(env, activityClass, "androidHttpRequest", "(Ljava/lang/String;)[B"), jstr));
+
+    if (bytes_array == NULL) {
+        callback(0, 200, NULL, callbackdata);
+        (*vm)->DetachCurrentThread(vm);
+        return;
+    }
+
     jsize num_bytes = (*env)->GetArrayLength(env, bytes_array);
     jbyte *elements = (*env)->GetByteArrayElements(env, bytes_array, NULL);
     if (elements != NULL) {

base/sources/backends/data/android_java/org/armory3d/AndroidHttpRequest.java

@@ -9,21 +9,25 @@ import java.net.URL;
 class AndroidHttpRequest {
 
 	public static byte[] androidHttpRequest(String address) throws Exception {
-		// https://developer.android.com/reference/java/net/HttpURLConnection.html
-		URL url = new URL(address);
-		HttpURLConnection urlConnection = (HttpURLConnection)url.openConnection();
-		InputStream in = new BufferedInputStream(urlConnection.getInputStream());
+		try {
+			// https://developer.android.com/reference/java/net/HttpURLConnection.html
+			URL url = new URL(address);
+			HttpURLConnection urlConnection = (HttpURLConnection)url.openConnection();
+			InputStream in = new BufferedInputStream(urlConnection.getInputStream());
 
-		ByteArrayOutputStream buffer = new ByteArrayOutputStream();
-		int i;
-		byte[] data = new byte[4];
-		while ((i = in.read(data, 0, data.length)) != -1) {
-			buffer.write(data, 0, i);
+			ByteArrayOutputStream buffer = new ByteArrayOutputStream();
+			int i;
+			byte[] data = new byte[4];
+			while ((i = in.read(data, 0, data.length)) != -1) {
+				buffer.write(data, 0, i);
+			}
+			buffer.flush();
+			byte[] result = buffer.toByteArray();
+
+			urlConnection.disconnect();
+			return result;
+		} catch (Exception e) {
+			return null;
 		}
-		buffer.flush();
-		byte[] result = buffer.toByteArray();
-
-		urlConnection.disconnect();
-		return result;
 	}
 }