Ketai Library Can Not Discover Devices

NewStudent

Hey guys recently i decided to make a multiplayer pong game every player will play on their phones over bluetooth so to accomplish that i downloaded ketai library and started using bluetooth then i noticed that library was not finding any devies (i double checked that all bluetooth devices were visible) then i made some research and people says that you need to add coarse and fine location permissions to your sketch so i did that and it worked for once but then when i restarted the sketch it didnt i checked everything i didnt made any diffrence so can you help me get it working again?

Here is my code:

Pong.pde:

    import oscP5.*;
    import android.os.Bundle;
    import android.view.WindowManager;
    import android.content.res.Configuration;
    import android.content.Intent;
    import ketai.net.bluetooth.*;
    import ketai.ui.*;
    import ketai.net.*;
    KetaiBluetooth bt;
    Ball a;
    Paddle p;
    Paddle q;
    KetaiList klist;
    boolean mainScreen = false;
    boolean configured = false;
    float previous;
    float ballPrevious;
    int p1score;
    int state = 0;
    int p2score;
    float p1y;
    float p2y;

public void onConfigurationChanged(Configuration newConfig) {
  super.getActivity().onConfigurationChanged(newConfig);
}

void onCreate(Bundle bundle) {
  super.onCreate(bundle);
  bt = new KetaiBluetooth(this);
  super.onCreate(bundle);
  getActivity().getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
}

void onActivityResult(int requestCode, int resultCode, Intent data) {
  bt.onActivityResult(requestCode, resultCode, data);
}

void setup()
{
  bt.start();
  textSize(72);
  textAlign(CENTER);
  previous = millis();
  q = new Paddle(10, 150, 250);
  p = new Paddle(10, 150, width - 250);
  a = new Ball();
  fullScreen();
  orientation(LANDSCAPE);
}

void draw()
{
  if (configured)
  {
    if (!mainScreen)
    {
      mainScreen();
    } else
    {
      if (touches.length == 2)
      {
        a.move();
        if (touches[0].x > width / 2)
        {
          p1y = touches[0].y;
          p2y = touches[1].y;
        } else
        {
          p1y = touches[1].y;
          p2y = touches[0].y;
        }
      }
      gameScreen();
      a.display();
      a.bounce();
      a.collideRightPaddle();
      a.collideLeftPaddle();
      a.offScreen();
      p.display();
      q.display();
      p.y = p1y;
      q.y = p2y;
      checkTime();
    }
  } else
  {
    bluetoothScreen();
  }
}

void checkTime()
{
  if (millis() - previous > 20000 && !(p.h == 200))
  {
    if (a.xs > 0) a.xs = a.xs + 1;
    if (a.xs < 0) a.xs = a.xs - 1;
    previous = millis();
    q.speed +=1.32;
    p.speed +=1.32;
    p.h += 8;
    q.h += 8;
  }
}

void touchStarted()
{
  if (touches[0].x > width / 2 - 250 && touches[0].y > height / 2 - 125 && touches[0].x < width / 2 + 250 && touches[0].y < height / 2 + 125 && configured) mainScreen = true;
  if (touches[0].y < height / 5 && touches[0].x < width / 3) bt.discoverDevices();
  if (touches[0].y < height / 5 && touches[0].x < width / 3 * 2 && touches[0].x > width / 3 && touches[0].x < width) bt.makeDiscoverable();
  if (touches[0].y < height / 5 && touches[0].x < width && touches[0].x > width / 3 * 2) getDevices();
}

void getDevices()
{
  if (bt.getDiscoveredDeviceNames().size() > 0) {
    ArrayList<String> list = bt.getDiscoveredDeviceNames();
    list.add("CANCEL");
    klist = new KetaiList(this, list);
  } else if (bt.getPairedDeviceNames().size() >= 0) {
    ArrayList<String> list = bt.getPairedDeviceNames();
    list.add("CANCEL");
    klist = new KetaiList(this, list);
  }
}

void onKetaiListSelection(KetaiList klist)
{
  String selection = klist.getSelection();
  if (!selection.equals("CANCEL"))bt.connectToDeviceByName(selection);
  klist = null;
}

Ball.pde:

class Ball
{
  float x = width / 2;
  float y = height / 2;
  float xs = -10;
  float angle = 45;
  float ys = 6;
  float diameter = 40;

  void move()
  {
    x += xs;
    y += ys;
  }

  void display()
  {
    fill(0, 255, 0);
    noStroke();
    ellipse(x, y, diameter, diameter);
    stroke(255);
    fill(255);
  }

  void bounce()
  {
    if ((y + diameter / 2) > height)
    {
      if(ys > 0) ys = -ys;
    }
    if ((y - diameter / 2) < 0)
    {
      if(ys < 0) ys = -ys;
    }
  }

  void collideRightPaddle()
  {
    float pbottom = p.y + p.h / 2;
    float ptop = p.y - p.h /2;
    if (y >= ptop && y <= pbottom && x + diameter / 2 > width - 250 - p.w / 2)
    {
      float place = y - p.y;
      angle = map(place, -(p.h / 2), (p.h / 2), -75, 75);
      ys = map(angle, -75, 75, -xs, xs);
      xs = -xs;
    }
  }

  void collideLeftPaddle()
  {
    float pbottom = q.y + q.h / 2;
    float ptop = q.y - q.h /2;
    if (y >= ptop && y <= pbottom && x - diameter / 2 < 250 + q.w / 2)
    {
      float place = y - q.y;
      angle = map(place, -(q.h / 2), (q.h / 2), 75, -75);
      ys = map(angle, -75, 75, -xs, xs);
      xs = -xs;
    }
  }

  void offScreen()
  {
    if ((x + diameter / 2) >= width - 190)
    {
      x = width / 2;
      y = height / 2;
      p1score++;
    }
    if ((x - diameter / 2) <= 190)
    {
      x = width / 2;
      y = height / 2;
      p2score++;
    }
  }
}

Paddle.pde:

class Paddle
{
  float w;
  float h;
  float x;
  float y = height / 2;
  float speed = 10;
  Paddle(float m, float n, float b)
  {
    w = m;
    h = n;
    x = b;
  }

  void display()
  {
    rectMode(CENTER);
    rect(x, y, w, h);
  }
}

Screen.pde: void mainScreen() { background(0); fill(0, 255, 0); rectMode(CENTER); rect(width / 2, height / 2, 500, 250); fill(255); text("PLAY", width / 2, height / 2 + 25); }

void gameScreen()
{
  background(0);
  stroke(255);
  strokeWeight(3);
  line(width / 2, 0, width / 2, height);
  text(p1score, 200, 200);
  text(p2score, width - 200, 200);
}

void bluetoothScreen()
{
  background(0);
  fill(78, 93, 75);
  rectMode(CORNER);
  stroke(255);
  strokeWeight(3);
  rect(0, 0, width / 3, height / 5);
  rect(width / 3, 0, width / 3 * 2, height / 5);
  rect(width / 3 * 2, 0, width, height / 5);
  textAlign(CENTER);
  fill(255);
  text("Discover Devices", width / 3 / 2, height / 5 / 2);
  text("Make Discoverable", width / 2, height / 5 / 2);
  text("Devices", width / 3 + width / 3 * 1.5, height / 5 / 2);
}

Cant give you manifest file it breaks it but i checked it and there is coarse and fine location permissions as well as bluetooth and bluetooth admin

NewStudent

well i guess noone can help

akenaton

@NewStudent===

i have already explained on this forum that ketai bluetooth is not (today) the way to use bluetooth: this can be done in a more direct mode using android classes for BT. Resuming: you use BluetoothAdapter, register a broadcastreceiver and an intentFilter with Action_Found: that s all!

the imports::

import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;

at the very beginning you verify that bluetooth is enabled (startActivityForResult); if yes you startDiscovery && create an instance of your class extending broadcastReceiver class: here is the Action_Found and here you can get the device(s) name(s) and adresses.

Dont forget after that (onPause()) to unregister your receiver.

PS: why are you calling fullscreen and the android flags for fullscreen??? - Dont mix android and p5 ...