Use Integer value directly for formatted string

a

app/src/main/java/us/shandian/giga/ui/adapter/MissionAdapter.java

@@ -580,7 +580,7 @@ public class MissionAdapter extends Adapter<ViewHolder> implements Handler.Callb
             }
             applyChanges();
 
-            String msg = String.format(mContext.getString(R.string.deleted_downloads), String.valueOf(mHidden.size()));
+            String msg = String.format(mContext.getString(R.string.deleted_downloads), mHidden.size());
             mSnackbar = Snackbar.make(mView, msg, Snackbar.LENGTH_INDEFINITE);
             mSnackbar.setAction(R.string.undo, s -> {
                 Iterator<Mission> i = mHidden.iterator();

app/src/main/res/values/strings.xml

@@ -572,7 +572,7 @@
     <string name="clear_download_history">Clear download history</string>
     <string name="confirm_prompt">Do you want to clear your download history or delete all downloaded files?</string>
     <string name="delete_downloaded_files">Delete downloaded files</string>
-    <string name="deleted_downloads">Deleted %s downloads</string>
+    <string name="deleted_downloads">Deleted %1$s downloads</string>
     <string name="stop">Stop</string>
     <string name="max_retry_msg">Maximum retries</string>
     <string name="max_retry_desc">Maximum number of attempts before canceling the download</string>