优化版本格式检查逻辑，spinner看不清增加背景色

main/java/com/hty/browser/FavoriteActivity.java

@@ -10,6 +10,7 @@ import android.content.DialogInterface;
 import android.content.Intent;
 import android.database.Cursor;
 import android.database.sqlite.SQLiteDatabase;
+import android.graphics.Color;
 import android.net.Uri;
 import android.os.Bundle;
 import android.text.Editable;
@@ -293,6 +294,7 @@ public class FavoriteActivity extends Activity {
                 editText_url.setText(url);
                 layout.addView(editText_url);
                 final Spinner spinner = new Spinner(this);
+                spinner.setBackgroundColor(Color.GRAY);
                 ArrayList<String> list = new ArrayList<>();
                 DBHelper helper = new DBHelper(this);
                 Cursor cursor = helper.category();