diff --git a/app/src/main/java/com/xypower/mplive/MainActivity.java b/app/src/main/java/com/xypower/mplive/MainActivity.java
index 05ea909..01d9362 100644
--- a/app/src/main/java/com/xypower/mplive/MainActivity.java
+++ b/app/src/main/java/com/xypower/mplive/MainActivity.java
@@ -214,11 +214,14 @@ public class MainActivity extends AppCompatActivity implements RtmpHandler.RtmpL
             @Override
             public void onClick(View v) {
                 if (btnPublish.getText().toString().contentEquals("publish")) {
-                    rtmpUrl = efu.getText().toString();
+                    if (rtmpUrl == null || rtmpUrl.isEmpty()) {
+                        Toast.makeText(getApplicationContext(), "没有正确的推送地址", Toast.LENGTH_SHORT).show();
+                        return;
+                    }
                     SharedPreferences.Editor editor = sp.edit();
                     editor.putString("rtmpUrl", rtmpUrl);
                     editor.apply();
-
+                    efu.setText(rtmpUrl);
                     mPublisher.startPublish(rtmpUrl);
 //                    mPublisher.startCamera();
                     mPublisher.switchCameraFace(cameraId);