Fix clipData may be null bug

Fix length = 0 divide
Fix link_item size

app/src/main/java/fr/mobdev/goblim/activity/UploadActivity.java

@@ -221,7 +221,8 @@ public class UploadActivity extends AppCompatActivity {
                     public void run() {
                         if(progressDialog != null) {
                             progressDialog.setMessage(getString(R.string.uploading_files)+" "+fileNo+"/"+nbFiles);
-                            progressDialog.setProgress(progress * 100 / length);
+                            if(length != 0)
+                                progressDialog.setProgress(progress * 100 / length);
                         }
                     }
                 });
@@ -531,7 +532,7 @@ public class UploadActivity extends AppCompatActivity {
                 adapter.addUri(this,imageUri);
             } else {
                 ClipData clip = returnIntent.getClipData();
-                for(int i = 0; i < clip.getItemCount(); i++) {
+                for(int i = 0; clip != null && i < clip.getItemCount(); i++) {
                     Uri imageUri = clip.getItemAt(i).getUri();
                     uris.add(imageUri);
                     updateSpanCount();

app/src/main/res/layout/link_item.xml

@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
-    android:layout_height="match_parent"
+    android:layout_height="200dp"
     android:layout_margin="5dp"
     >