connect to hardware agent via Bluetooth.

Author: xei

controller-application/Police/app/src/main/java/io/github/xei/police/joystick/JoystickContract.kt

@@ -18,7 +18,9 @@ interface JoystickContract {
 
         @Throws(BluetoothNotSupportException::class)
         fun isBluetoothEnabled(): Boolean
+        fun startBluetoothSettingActivity()
         fun startEnableBluetoothActivityForResult()
+        fun connectToHardwareAgent()
     }
 
     interface Presenter : BasePresenter {

controller-application/Police/app/src/main/java/io/github/xei/police/joystick/JoystickFragment.kt

@@ -3,6 +3,7 @@ package io.github.xei.police.joystick
 
 import android.app.Activity
 import android.bluetooth.BluetoothAdapter
+import android.bluetooth.BluetoothSocket
 import android.content.ActivityNotFoundException
 import android.content.Intent
 import android.os.Bundle
@@ -16,6 +17,11 @@ import android.widget.Toast
 
 import io.github.xei.police.R
 import io.github.xei.police.exception.BluetoothNotSupportException
+import java.io.InputStream
+import java.io.OutputStream
+import java.util.*
+import android.content.ComponentName
+import java.io.IOException
 
 
 /**
@@ -29,6 +35,10 @@ class JoystickFragment : Fragment(), JoystickContract.View, View.OnClickListener
         private const val REQUEST_CODE_ENABLE_BLUETOOTH = 100
         private const val REQUEST_CODE_SPEECH_RECOGNIZE = 200
 
+        private const val BLUETOOTH_NAME_HARDWARE_AGENT = "HC-06"
+        // Standard SerialPortService ID
+        private const val SPP_UUID_SERIAL_BOARD = "00001101-0000-1000-8000-00805f9b34fb"
+
         fun newInstance() = JoystickFragment()
     }
 
@@ -39,6 +49,11 @@ class JoystickFragment : Fragment(), JoystickContract.View, View.OnClickListener
     private lateinit var mUpArrowKeyImageButton: ImageButton
     private lateinit var mVoiceCommandImageButton: ImageButton
 
+    private var mBluetoothSocket: BluetoothSocket? = null
+    private var mInputStream: InputStream? = null
+    private var mOutputStream: OutputStream? = null
+    private var mBuffer: String = ""
+
 
     override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?,
                               savedInstanceState: Bundle?): View? {
@@ -75,11 +90,46 @@ class JoystickFragment : Fragment(), JoystickContract.View, View.OnClickListener
         }
     }
 
+    override fun startBluetoothSettingActivity() {
+        val intent = Intent(Intent.ACTION_MAIN, null)
+        intent.addCategory(Intent.CATEGORY_LAUNCHER)
+        intent.component = ComponentName("com.android.settings",
+                "com.android.settings.bluetooth.BluetoothSettings")
+        intent.flags = Intent.FLAG_ACTIVITY_NEW_TASK
+        startActivity(intent)
+    }
+
     override fun startEnableBluetoothActivityForResult() {
         val intent = Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE)
         startActivityForResult(intent, REQUEST_CODE_ENABLE_BLUETOOTH)
     }
 
+    override fun connectToHardwareAgent() {
+        val hardwareAgent = BluetoothAdapter.getDefaultAdapter().bondedDevices.firstOrNull {it.name == BLUETOOTH_NAME_HARDWARE_AGENT}
+        try {
+            mBluetoothSocket = hardwareAgent!!.createRfcommSocketToServiceRecord(UUID.fromString(SPP_UUID_SERIAL_BOARD))
+            mBluetoothSocket?.connect()
+            mInputStream = mBluetoothSocket?.inputStream
+            mOutputStream = mBluetoothSocket?.outputStream
+
+            showToast("Device connected to hardware agent.")
+
+        } catch (ioe: IOException) {
+            showToast("Connection to hardware agent failed.")
+
+            // TODO: handle refresh logic
+            activity?.finish()
+        } catch (npe: NullPointerException) {
+            // The device Bluetooth is not paired with the hardware agent.
+            showToast("Please pair your device bluetooth with the hardware agent: $BLUETOOTH_NAME_HARDWARE_AGENT")
+            startBluetoothSettingActivity()
+
+            // TODO: handle refresh logic
+            activity?.finish()
+        }
+
+    }
+
     private fun startVoiceRecognitionActivityForResult() {
         val intent = Intent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH)
         intent.putExtra(RecognizerIntent.EXTRA_CALLING_PACKAGE, javaClass.`package`.name)
@@ -108,8 +158,8 @@ class JoystickFragment : Fragment(), JoystickContract.View, View.OnClickListener
         when (requestCode) {
 
             REQUEST_CODE_ENABLE_BLUETOOTH -> if (resultCode == Activity.RESULT_OK) {
-                // TODO: connect to device
-                // TODO: change LED to green
+                connectToHardwareAgent()
+                // TODO: change status LED color to green
             }
 
             REQUEST_CODE_SPEECH_RECOGNIZE -> if (resultCode == Activity.RESULT_OK && data != null) {

controller-application/Police/app/src/main/java/io/github/xei/police/joystick/JoystickPresenter.kt

@@ -16,7 +16,7 @@ class JoystickPresenter(private val model: JoystickContract.Model, private val v
         if (view.isActive) {
             try {
                 if (view.isBluetoothEnabled()) {
-                    // TODO: connect to device
+                    view.connectToHardwareAgent()
                 } else {
                     view.startEnableBluetoothActivityForResult()
                 }