修改接收广播动作

app/src/main/java/com/example/chaoran/DjActivity.java

@@ -2455,7 +2455,7 @@ public class DjActivity extends TabActivity implements OnInitListener, DecodeInf
         public void start() {
             mScanManager.startDecode();
             IntentFilter filter = new IntentFilter();
-            filter.addAction(""); //添加action
+            filter.addAction("android.intent.ACTION_DECODE_DATA"); //添加action
             registerReceiver(this, filter);
         }