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How to enable 3G mobile data programmatically in Android?

package com.testing.connection; import android.app.Activity; import android.net.ConnectivityManager; import android.os.Bundle; import android.view.View; import android.view.View.OnClickListener; import android.widget.Button; import android.widget.Toast; public class ConnectionActivity extends Activity implements OnClickListener{ Button press; /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); press = (Button)findViewById(R.id.button1); press.setOnClickListener(this); } public void onClick(View view){ ConnectivityManager mgr = (ConnectivityManager)getSystemService(CONNECTIVITY_SERVICE); boolean is3G = mgr.getNetworkInfo(ConnectivityManager.TYPE_MOBILE).isConnectedOrConnecting(); boolean isWifi = mgr.getNetworkInfo(ConnectivityManager.TYPE_WIFI).isConnectedOrConnecting(); if(isWifi){ Toast.makeText(this, "WiFi connected...", Toast.LENGTH_LONG).show(); sendMail(); } else{ //**Turn on Mobile Data //**Then sendMail() //**Turn off Mobile Data } } public void sendMail() throws MessagingException{ String host = "smtp.gmail.com"; String password = "abc123"; String from = " testing@gmail.com "; String toAddress = enterEmail.getText().toString(); Properties properties = System.getProperties(); properties.put("mail.smtp.host", host); properties.put("mail.smtps.auth", true); properties.put("mail.smtp.starttls.enable", true); Session session = Session.getInstance(properties, null); MimeMessage message = new MimeMessage(session); message.setFrom(new InternetAddress(from)); message.setRecipients(Message.RecipientType.TO, toAddress); message.setSubject("Anti-Theft Attachment"); BodyPart messageBodyPart = new MimeBodyPart(); messageBodyPart.setText("Your email address is saved as backup email in Anti-Theft Application"); Multipart multipart = new MimeMultipart(); multipart.addBodyPart(messageBodyPart); message.setContent(multipart); try{ Transport transport = session.getTransport("smtps"); transport.connect(host, from, password); transport.sendMessage(message, message.getAllRecipients()); System.out.println("Mail Sent Successfully"); transport.close(); } catch (SendFailedException sfe){ System.out.println(sfe); } } }

Hi, I am developing an Android application, and I would like to have the function of automatically turning on mobile data after detecting Wi-Fi that is not connected to the phone, because I would like to make sure that the message can be sent whether Wi-Fi is connected or not ... So, when Wi-Fi is detected not connected, 3G data is turned on and an email is sent, and the data network is disconnected ...

Can I learn how to rotate a 3G network and disconnect a 3G network ??? The Internet source is sparse, and I hope someone can help me solve it ... Thanks ...

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6 answers

Hope this code helps you, In my case it worked.

 ConnectivityManager dataManager; dataManager = (ConnectivityManager)getSystemService(Context.CONNECTIVITY_SERVICE); Method dataMtd = ConnectivityManager.class.getDeclaredMethod("setMobileDataEnabled", boolean.class); dataMtd.setAccessible(true); dataMtd.invoke(dataManager, true); //True - to enable data connectivity .

in manifest

  <uses-permission android:name="android.permission.CHANGE_WIFI_STATE"/> <uses-permission android:name="android.permission.ACCESS_WIFI_STATE"/> <uses-permission android:name="android.permission.INTERNET"/> <uses-permission android:name="android.permission.CHANGE_NETWORK_STATE"/>
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Due to security issues, you are not allowed to program the mobile network programmatically.

The only thing you can do is invite the user to turn on the mobile network, showing the settings.

 Intent intent=new Intent(Settings.ACTION_DATA_ROAMING_SETTINGS); ComponentName cn = new ComponentName("com.android.phone","com.android.phone.Settings"); intent.setComponent(cn); startActivity(intent);
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For Android 2.3 and higher

 private void setMobileDataEnabled(Context context, boolean enabled) { final ConnectivityManager conman = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE); final Class conmanClass = Class.forName(conman.getClass().getName()); final Field iConnectivityManagerField = conmanClass.getDeclaredField("mService"); iConnectivityManagerField.setAccessible(true); final Object iConnectivityManager = iConnectivityManagerField.get(conman); final Class iConnectivityManagerClass = Class.forName(iConnectivityManager.getClass().getName()); final Method setMobileDataEnabledMethod = iConnectivityManagerClass.getDeclaredMethod("setMobileDataEnabled", Boolean.TYPE); setMobileDataEnabledMethod.setAccessible(true); setMobileDataEnabledMethod.invoke(iConnectivityManager, enabled); }

This also requires the following permission.

  <uses-permission android:name="android.permission.CHANGE_NETWORK_STATE"/>

Please refer to this link.

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  • "android.permission.ACCESS_NETWORK_STATE"
  • "android.permission.ACCESS_WIFI_STATE"
  • "android.permission.CHANGE_WIFI_STATE"
  • "android.permission.CHANGE_NETWORK_STATE"

  • Here whatToDo is a boolean, "true" to enable gprs and "false" to disable gprs.

     public class TurnDataOn { public static boolean isWifiOn(Context context) { WifiManager wifiManager = (WifiManager) context.getSystemService(context.WIFI_SERVICE); boolean wifiEnabled = wifiManager.isWifiEnabled(); Log.e("isWifiOn", String.valueOf(wifiEnabled)); return wifiEnabled; } public static boolean isWifiConnected(Context context) { ConnectivityManager connectivityManager = (ConnectivityManager) context.getSystemService(context.CONNECTIVITY_SERVICE); NetworkInfo wifiInfo = connectivityManager.getNetworkInfo(ConnectivityManager.TYPE_WIFI); boolean wifiConnected = wifiInfo.getState() == NetworkInfo.State.CONNECTED; Log.e("isWIFIConnected", String.valueOf(wifiConnected)); return wifiConnected; } public static boolean isGprsConnected(Context context) { ConnectivityManager connectivityManager = (ConnectivityManager) context.getSystemService(context.CONNECTIVITY_SERVICE); NetworkInfo mobileInfo = connectivityManager.getNetworkInfo(ConnectivityManager.TYPE_MOBILE); boolean mobileConnected = mobileInfo.getState() == NetworkInfo.State.CONNECTED; Log.e("ISGPRSConnected", String.valueOf(mobileConnected)); return mobileConnected; } public static void toggleGprs(Context context, boolean whatToDo) { ConnectivityManager conman = (ConnectivityManager) context.getApplicationContext().getSystemService(Context.CONNECTIVITY_SERVICE); @SuppressWarnings("rawtypes") Class conmanClass = null; try { conmanClass = Class.forName(conman.getClass().getName()); } catch (ClassNotFoundException e) { e.printStackTrace(); } Field iConnectivityManagerField = null; try { iConnectivityManagerField = conmanClass.getDeclaredField("mService"); } catch (NoSuchFieldException e) { e.printStackTrace(); } iConnectivityManagerField.setAccessible(true); Object iConnectivityManager = null; try { iConnectivityManager = iConnectivityManagerField.get(conman); } catch (IllegalAccessException e) { e.printStackTrace(); } @SuppressWarnings("rawtypes") Class iConnectivityManagerClass = null; try { iConnectivityManagerClass = Class.forName(iConnectivityManager.getClass().getName()); } catch (ClassNotFoundException e) { e.printStackTrace(); } @SuppressWarnings("unchecked") Method setMobileDataEnabledMethod = null; try { setMobileDataEnabledMethod = iConnectivityManagerClass.getDeclaredMethod("setMobileDataEnabled", Boolean.TYPE); } catch (NoSuchMethodException e) { e.printStackTrace(); } setMobileDataEnabledMethod.setAccessible(true); try { setMobileDataEnabledMethod.invoke(iConnectivityManager, whatToDo); } catch (IllegalAccessException e) { e.printStackTrace(); } catch (InvocationTargetException e) { e.printStackTrace(); } } }
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To turn off

 final ConnectivityManager conman = (ConnectivityManager)this.getSystemService(Context.CONNECTIVITY_SERVICE); Method dataMtd = ConnectivityManager.class.getDeclaredMethod("setMobileDataEnabled", boolean.class); dataMtd.setAccessible(false); dataMtd.invoke(conman, false);

To enable

 final ConnectivityManager conman = (ConnectivityManager)this.getSystemService(Context.CONNECTIVITY_SERVICE); Method dataMtd = ConnectivityManager.class.getDeclaredMethod("setMobileDataEnabled", boolean.class); dataMtd.setAccessible(true); dataMtd.invoke(conman, true);
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  public void onToggleClicked(View view) throws NoSuchMethodException, InvocationTargetException, IllegalAccessException { // Is the toggle on? boolean on = ((ToggleButton) view).isChecked(); if (on) { // Enable data ConnectivityManager dataManager; dataManager = (ConnectivityManager)getSystemService(Context.CONNECTIVITY_SERVICE); Method dataMtd = ConnectivityManager.class.getDeclaredMethod("setMobileDataEnabled", boolean.class); dataMtd.setAccessible(true); dataMtd.invoke(dataManager, true); //True - to enable data connectivity . } else { // Disable data ConnectivityManager dataManager; dataManager = (ConnectivityManager)getSystemService(Context.CONNECTIVITY_SERVICE); Method dataMtd = ConnectivityManager.class.getDeclaredMethod("setMobileDataEnabled", boolean.class); dataMtd.setAccessible(true); dataMtd.invoke(dataManager, false); //True - to enable data connectivity . } }

This worked for me on 4.4.3 bros Use switches or switches

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Source: https://habr.com/ru/post/1443368/

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