修改网络教室白板课件选择预览流程

live_teaching/src/main/java/com/daya/live_teaching/widget/dialog/CourseWareSelectDialog.java

@@ -160,6 +160,10 @@ public class CourseWareSelectDialog extends Dialog implements View.OnClickListen
                 CoursewareListBean.RowsBean selectCourseware = mCoursewareAdapter.getSelectCourseware();
                 if (selectCourseware != null) {
                     if (isShowImagePreview) {
+                        if (TextUtils.isEmpty(selectCourseware.musicImg)) {
+                            ToastUtil.getInstance().showShort("暂无曲谱图片");
+                            return;
+                        }
                         //显示图片预览
                         onEventListener.showCoursewarePreviewDialog(selectCourseware);
                     } else {

live_teaching/src/main/java/com/daya/live_teaching/widget/dialog/CoursewarePreviewDialog.java

@@ -96,7 +96,7 @@ public class CoursewarePreviewDialog extends Dialog implements View.OnClickListe
                 if (currentItem < mAdapter.getData().size()) {
                     String imgUrl = mAdapter.getData().get(currentItem);
                     if (TextUtils.isEmpty(imgUrl)) {
-                        ToastUtil.getInstance().showShort("该课件暂无乐谱哦");
+                        ToastUtil.getInstance().showShort("暂无曲谱图片");
                         return;
                     }
                     View imgContainerView = mAdapter.getViewByPosition(currentItem, R.id.fl_container);