Create Bluetooth ON/OFF Switch


To create a Bluetooth ON/OFF switch in Sketchware android project follow the steps given below.

1. In VIEW area of your sketchware android project, insert a LinearH and inside it insert a Switch switch1.
For switch1 write text as 'Bluetooth', set width as match_parent, and set gravity as left.

2. Add a BluetoothConnect component bt.

3. Add onResume event and here use blocks to set the checked state of switch1 as per the state of bluetooth.
4. Create a more block setBluetooth<enable> and define it by putting following code in an add source directly block.

android.bluetooth.BluetoothAdapter bluetoothAdapter = android.bluetooth.BluetoothAdapter.getDefaultAdapter();
boolean isEnabled = bluetoothAdapter.isEnabled();
if (_enable && !isEnabled) {
bluetoothAdapter.enable();
} else if(!_enable && isEnabled) {
bluetoothAdapter.disable();
}

 5. In switch1 onCheckChanged use block the setBluetooth Block to set the bluetooth on or off according to the checked state of switch1.

6. Save and run the project. Now on clicking the Switch, we can switch on or switch off the bluetooth in our device. Watch the videos below.


Comments

  1. DeveloperShustolJanuary 4, 2019 at 9:20 AM

    can you translate all these blocks into java code ?I went back to the old version. sketchware without.bluetooth, because my compiler started to produce non-existent errors in my old project , a large one , which I am working on .I will not adapt it to the new version , because I do not understand what he wants from me .

    ReplyDelete
    Replies
    1. sanjeevJanuary 4, 2019 at 8:46 PM

      The new class is:

      public void _setBluetooth(boolean _enable){
      android.bluetooth.BluetoothAdapter bluetoothAdapter = android.bluetooth.BluetoothAdapter.getDefaultAdapter();
      boolean isEnabled = bluetoothAdapter.isEnabled();
      if (_enable && !isEnabled) {
      bluetoothAdapter.enable();
      } else if(!_enable && isEnabled) {
      bluetoothAdapter.disable();
      }
      }


      It is used in switch on check changed listner as:

      switch1.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
      public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
      _setBluetooth(isChecked);
      }
      });

      Delete
    2. McAtom.blogspot.comJanuary 27, 2019 at 6:48 AM

      New class have a error, this error is
      ..........................
      syntax error on token"void_setBluetooth",=expected after this token
      ...........................

      Delete
    3. McAtom.blogspot.comJanuary 27, 2019 at 6:49 AM

      How to I get?

      Delete
    4. sanjeevJanuary 27, 2019 at 7:42 AM

      There should be space between void and _setBluetooth.

      Delete
    5. McAtom.blogspot.comJanuary 27, 2019 at 8:16 AM

      Now I space,but new have error.this error is
      ..................................
      syntax error on token "void", invalid AssignmentOperator
      ..................................

      Delete
    6. McAtom.blogspot.comJanuary 27, 2019 at 8:30 AM

      Please sir, Explain me.

      Delete
    7. Asien shalomSeptember 1, 2020 at 1:00 PM

      This comment has been removed by the author.

      Delete
  2. UnknownJanuary 6, 2019 at 6:22 AM

    How to make a online earning app.
    Please find this

    ReplyDelete
  3. DeveloperShustolJanuary 6, 2019 at 11:07 PM

    This comment has been removed by the author.

    ReplyDelete
  4. DeveloperShustolJanuary 7, 2019 at 1:02 AM

    А можете подсказать , как кнопкой включить/отключить WiFi & включить/отключить GPS?

    ReplyDelete
  5. Make Bluetooth send filesJanuary 14, 2019 at 12:53 PM

    Please make send files using Bluetooth in SkeSketchw

    ReplyDelete
  6. UnknownJanuary 20, 2019 at 2:08 AM

    How to send 2bits number using blBluetoo ?

    ReplyDelete
  7. McAtom.blogspot.comJanuary 26, 2019 at 10:39 AM

    Error have a code.

    ReplyDelete
  8. azrtutorialFebruary 19, 2019 at 8:44 AM

    Hello Developer, I need a tutorial, How to Make an Arduino Remote Control App via Bluetooth n Wifi with Skethware, I like to see Tutorials on YouTube and learn what you upload, I just want to learn. Thank you, Dev ...

    ReplyDelete
  9. AnonymousMarch 11, 2019 at 1:30 PM

    Hey develeode plz make a tutorial on Arduino control Like light on off,ultra Sonic sensor , wherever which can conttil the all tyoe arduArd sensors

    ReplyDelete
  10. DelalexApril 1, 2019 at 8:59 AM

    Please make a tutorial how to send data through Bluetooth

    ReplyDelete
  11. HelenaFebruary 20, 2020 at 9:10 AM

    What does mean the message "read failed, socket might closed or timeout, read ret: - 1". How to fix it?

    ReplyDelete
    Replies
    1. sanjeevFebruary 20, 2020 at 9:23 AM

      That is some problem with uuid.
      * Create a String variable UUID.
      * Then use these codes on ListView item click or Bluetooth address click:

      final android.bluetooth.BluetoothDevice device = mBluetoothAdapter.getRemoteDevice(listmap.get((int)_position).get("address").toString());
      final ParcelUuid[] uids;

      if (android.os.Build.VERSION.SDK_INT >= 15){
      uids = device.getUuids();
      UUID = uids[0].toString();
      }
      else {
      try {
      Class cl = Class.forName("android.bluetooth.BluetoothDevice");
      Class[] params = {};
      java.lang.reflect.Method method = cl.getMethod("getUuids", params); Object[] args = {};
      uids = (ParcelUuid[])method.invoke(device, args);
      UUID = uids[0].toString();
      } catch (Exception e) {
      showMessage("Activation of getUuids() failed: " + e); }

      }

      Then use block
      BluetoothConnect start connection with uuid UUID and address ..... with tag ...

      Delete
  12. Bne62September 1, 2020 at 5:17 AM

    mBluetoothAdapter cannot be resolved this message is coming

    ReplyDelete
    Replies
    1. sanjeevSeptember 1, 2020 at 6:37 PM

      The name of bluetooth adapter I used in codes is bluetoothAdapter. So change 'mBluetoothAdapter' to 'bluetoothAdapter' or vice versa.

      Delete
    2. sanjeevSeptember 1, 2020 at 6:41 PM

      android.bluetooth.BluetoothAdapter mBluetoothAdapter = android.bluetooth.BluetoothAdapter.getDefaultAdapter();

      You can add this line.

      Delete
    3. Bne62September 2, 2020 at 5:05 AM

      This comment has been removed by the author.

      Delete
    4. Bne62September 2, 2020 at 5:07 AM

      Actually the error comes is
      "read failed, socket might closed or timeout, read ret: - 1"
      Then i put the above code given by you containing UUID. But it gives error message saying mBluetoothAdapter cannot be resolved.

      Delete
    5. sanjeevSeptember 2, 2020 at 5:11 AM

      Add this before the code

      android.bluetooth.BluetoothAdapter mBluetoothAdapter = android.bluetooth.BluetoothAdapter.getDefaultAdapter();

      Delete
    6. Bne62September 2, 2020 at 5:17 AM

      This comment has been removed by the author.

      Delete
    7. Bne62September 2, 2020 at 6:12 AM

      After writing your above code now again this message comes
      read failed, socket might closed or timeout, read ret: - 1

      Delete
    8. Bne62September 6, 2020 at 8:55 PM

      Sir plz help

      Delete
  13. BenoullyOctober 2, 2020 at 6:47 AM

    1. ERROR in /storage/emulated/0/.sketchware/mysc/609/app/src/main/
    java/com/my/newproject/MainActivity.java (at line 123)
    if (_enable && !isEnabled) {
    AnAnnnn
    enable cannot be resolved to a variable
    2, ERROR in /storage/emulated/0/.sketchware/mysc/60%/app/sre/main/
    java/com/my/newproject/MainActivity. java (at line 125)
    else if(!_enable && isEnabled) {
    Annnnnn
    enable cannot be resolved to a variable
    2 problems (2 errors)

    ReplyDelete
  14. UnknownOctober 12, 2020 at 1:18 AM

    Hello sir can you make frequency analyzer app

    ReplyDelete

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