修复聊天室添加粉丝徽章，bitmap被回收的问题

live/src/main/java/com/yunbao/live/utils/LiveTextRender.java

@@ -322,6 +322,9 @@ public class LiveTextRender {
         tv.setText(bean.getMedalNmae());
         tv.setTypeface(Typeface.DEFAULT_BOLD);
         Bitmap bitmap = convertViewToBitmap(view);
+        if (bitmap == null) {
+            return null;
+        }
         Drawable drawable = new BitmapDrawable(bitmap);
         return drawable;
     }
@@ -330,10 +333,15 @@ public class LiveTextRender {
         view.measure(MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED), MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED));
         view.layout(0, 0, view.getMeasuredWidth(), view.getMeasuredWidth() / 3);
         // 153  72
-        view.buildDrawingCache();
-        Bitmap bitmap = view.getDrawingCache();
+        try {
+            view.buildDrawingCache();
+            Bitmap bitmap = view.getDrawingCache();
 
-        return bitmap;
+            return bitmap;
+        } catch (Exception e) {
+            e.printStackTrace();
+        }
+        return null;
     }
 
     public void render(final Context context, final TextView textView, final LiveChatBean bean) {