连接wifi时启动3g

Question

i want to make 3g works when wifi is enabled! Stop for a while wifi and connect through 3g. after that close 3g and work with wifi again! thanks!

Answer 1

Just disabling Wi-Fi? Both processes are automatic: connecting a Wi-Fi network when it is enabled and getting 3G when there isn't a Wi-Fi connection.

Answer 2

I don't think it is possible to switch to mobile data network when WiFi is enabled. Perhaps you should silently disable the WiFi (from code) and wait for the 3G network to establish. Once your required task is done, turn the WiFi on again and your 3G network will be disconnected.

Answer 3

I think the following should work...

WifiManager wm = null;
WifiManager.WifiLock wfl = null;

// To disable wi-fi
wm = (WifiManager) this.getSystemService(Context.WIFI_SERVICE);
if (wm != null) {
    wfl = wm.createWifiLock(WifiManager.WIFI_MODE_SCAN_ONLY, "myWifiLock");
    Boolean result = wm.setWifiEnabled(false);
    Log.d(TAG, "wm.setWifiEnabled(false) result: " + result);
}

// To re-enable wi-fi
if (wfl != null)
    wfl.release();
if (wm != null) {
    Boolean result = wm.setWifiEnabled(true);
    Log.d(TAG, "wm.setWifiEnabled(true) result: " + result);
}

Answer 4

here is a code that can enable and dissable inside your code!

  wifi = (WifiManager) getSystemService(Context.WIFI_SERVICE);                   

              Runnable runnable = new Runnable() {

              // ginetai o kwdikas gia to anoigma kai to klisimo tou wifi   
                  @Override
                  public void run() {


                    //  new LongOperation().execute();
                    for (int i = 0; i <= 150; i++) {

                      try {

                        Thread.sleep(1000);

                        if (i >= 0 && i <18){

                            wifi.setWifiEnabled(true);
                        //  wifi.setWifiEnabled(false);// Disabling WiFi


                          }

                          else if (i>= 18 && i < 40){

                        wifi.setWifiEnabled(true); 
                      //    wifi.setWifiEnabled(false); // Enabling WiFi


                          }

                          else if (i>= 40 && i < 58){

                    //      wifi.setWifiEnabled(true); // Disabling WiFi
                        wifi.setWifiEnabled(false);

                          }

                          else if (i>= 58 && i < 78){

                            wifi.setWifiEnabled(true);
                        //wifi.setWifiEnabled(false); // Enabling WiFi


                          }

                          else{

                        //  wifi.setWifiEnabled(true);
                            wifi.setWifiEnabled(false);// Disabling WiFi


                          }

                      } catch (InterruptedException e) {
                        e.printStackTrace();
                      }


                    }
                  }
                };
                new Thread(runnable).start();