Android uses broadcast to monitor the USB connection status (change situation)

I won’t say much nonsense, I will just post the code to you. The specific code is as follows:

package ; 
import ; 
import ; 
import ; 
import ; 
import ; 
/** 
 * Created by Administrator on 2017/6/26. 
 */ 
public class UsbConnect { 
  private final static String ACTION = ".USB_STATE"; 
  public void start(Context context) { 
    IntentFilter filter = new IntentFilter(); 
    (ACTION); 
    (usBroadcastReceiver, filter); 
  } 
  BroadcastReceiver usBroadcastReceiver = new BroadcastReceiver() { 
    @Override 
    public void onReceive(Context context, Intent intent) { 
      String action = (); 
      (context, "aciton =" + action, Toast.LENGTH_SHORT).show(); 
      if ((ACTION)) { 
        boolean connected = ().getBoolean("connected"); 
        (context, "aciton =" + connected, Toast.LENGTH_SHORT).show(); 
        if (connected) { 
        } else { 
        } 
      } 
    } 
  }; 
}

The above is what the editor introduced to you. Android uses broadcast to monitor the USB connection status. I hope it will be helpful to you. If you have any questions, please leave me a message and the editor will reply to you in time. Thank you very much for your support for my website!