添加部分提示

student/src/main/java/com/cooleshow/student/ui/web/AccompanyActivity.java

@@ -244,6 +244,14 @@ public class AccompanyActivity extends BaseMVPActivity<ActivityAccompanyBinding,
             @Override
             public void onDownloadAccompaniment(String accompanyUrl) {
                 AccompanyActivity.this.accompanimentUrl = accompanyUrl;
+                if (TextUtils.isEmpty(accompanimentUrl)) {
+                    runOnUiThread(new Runnable() {
+                        @Override
+                        public void run() {
+                            ToastUtil.getInstance().showShort("当前曲目无mp3伴奏");
+                        }
+                    });
+                }
             }
 
             /**

teacher/src/main/java/com/cooleshow/teacher/ui/web/AccompanyActivity.java

@@ -246,6 +246,14 @@ public class AccompanyActivity extends BaseMVPActivity<ActivityAccompanyBinding,
             @Override
             public void onDownloadAccompaniment(String accompanyUrl) {
                 AccompanyActivity.this.accompanimentUrl = accompanyUrl;
+                if (TextUtils.isEmpty(accompanimentUrl)) {
+                    runOnUiThread(new Runnable() {
+                        @Override
+                        public void run() {
+                            ToastUtil.getInstance().showShort("当前曲目无mp3伴奏");
+                        }
+                    });
+                }
             }
 
             /**