update
Zhengyu Peng
2 years ago
parent
756fee013c
commit
eda367239a
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package com.rookiedev.hexapod
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import android.annotation.SuppressLint
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import android.app.Activity
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import android.bluetooth.BluetoothAdapter
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import android.bluetooth.BluetoothDevice
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import android.bluetooth.BluetoothManager
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import android.content.BroadcastReceiver
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import android.content.Context
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import android.content.Intent
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import android.content.IntentFilter
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import android.os.Bundle
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import android.view.View
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import android.view.Window
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import android.widget.AdapterView.OnItemClickListener
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import android.widget.ArrayAdapter
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import android.widget.Button
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import android.widget.ListView
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import android.widget.TextView
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/**
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* This Activity appears as a dialog. It lists any paired devices and
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* devices detected in the area after discovery. When a device is chosen
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* by the user, the MAC address of the device is sent back to the parent
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* Activity in the result Intent.
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*/
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class DeviceListActivity : Activity() {
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/**
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* Member fields
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*/
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private var mBtAdapter: BluetoothAdapter? = null
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private var mContext: Context? = null
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private var bluetoothManager: BluetoothManager? = null
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/**
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* Newly discovered devices
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*/
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private var mNewDevicesArrayAdapter: ArrayAdapter<String>? = null
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@SuppressLint("MissingPermission")
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override fun onCreate(savedInstanceState: Bundle?) {
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super.onCreate(savedInstanceState)
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// Setup the window
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// requestWindowFeature(Window.FEATURE_INDETERMINATE_PROGRESS)
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setContentView(R.layout.activity_device_list)
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mContext = applicationContext
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// Set result CANCELED in case the user backs out
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setResult(RESULT_CANCELED)
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// Initialize array adapters. One for already paired devices and
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// one for newly discovered devices
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val pairedDevicesArrayAdapter = ArrayAdapter<String>(this, R.layout.device_name)
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mNewDevicesArrayAdapter = ArrayAdapter(this, R.layout.device_name)
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// Find and set up the ListView for paired devices
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val pairedListView: ListView = findViewById<ListView>(R.id.paired_devices)
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pairedListView.adapter = pairedDevicesArrayAdapter
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pairedListView.onItemClickListener = mDeviceClickListener
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// Find and set up the ListView for newly discovered devices
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// val newDevicesListView: ListView = findViewById(R.id.new_devices)
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// newDevicesListView.adapter = mNewDevicesArrayAdapter
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// newDevicesListView.onItemClickListener = mDeviceClickListener
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// Register for broadcasts when a device is discovered
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// var filter = IntentFilter(BluetoothDevice.ACTION_FOUND)
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// this.registerReceiver(mReceiver, filter)
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// Register for broadcasts when discovery has finished
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// filter = IntentFilter(BluetoothAdapter.ACTION_DISCOVERY_FINISHED)
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// this.registerReceiver(mReceiver, filter)
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// Get the local Bluetooth adapter
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bluetoothManager =
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mContext!!.getSystemService(Context.BLUETOOTH_SERVICE) as BluetoothManager
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bluetoothManager!!.adapter
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// Get a set of currently paired devices
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val pairedDevices: Set<BluetoothDevice> = bluetoothManager!!.adapter.bondedDevices
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// If there are paired devices, add each one to the ArrayAdapter
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if (pairedDevices.isNotEmpty()) {
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findViewById<View>(R.id.title_paired_devices).visibility = View.VISIBLE
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for (device in pairedDevices) {
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pairedDevicesArrayAdapter.add(
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"""
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${device.name}
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${device.address}
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""".trimIndent()
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)
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}
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} else {
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val noDevices = "No device"
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pairedDevicesArrayAdapter.add(noDevices)
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}
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}
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@SuppressLint("MissingPermission")
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override fun onDestroy() {
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super.onDestroy()
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// Make sure we're not doing discovery anymore
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// if (mBtAdapter != null) {
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// mBtAdapter!!.cancelDiscovery()
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// }
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// bluetoothManager!!.adapter.cancelDiscovery()
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// Unregister broadcast listeners
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// unregisterReceiver(mReceiver)
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}
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/**
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* The on-click listener for all devices in the ListViews
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*/
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@SuppressLint("MissingPermission")
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private val mDeviceClickListener =
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OnItemClickListener { av, v, arg2, arg3 -> // Cancel discovery because it's costly and we're about to connect
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// bluetoothManager!!.adapter.cancelDiscovery()
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// Get the device MAC address, which is the last 17 chars in the View
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val info = (v as TextView).text.toString()
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val address = info.substring(info.length - 17)
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// Create the result Intent and include the MAC address
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val intent = Intent()
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intent.putExtra(EXTRA_DEVICE_ADDRESS, address)
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// Set result and finish this Activity
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setResult(RESULT_OK, intent)
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finish()
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}
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/**
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* The BroadcastReceiver that listens for discovered devices and changes the title when
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* discovery is finished
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*/
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private val mReceiver: BroadcastReceiver = object : BroadcastReceiver() {
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@SuppressLint("MissingPermission")
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override fun onReceive(context: Context?, intent: Intent) {
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val action = intent.action
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// When discovery finds a device
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if (BluetoothDevice.ACTION_FOUND == action) {
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// Get the BluetoothDevice object from the Intent
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val device =
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intent.getParcelableExtra<BluetoothDevice>(BluetoothDevice.EXTRA_DEVICE)
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// If it's already paired, skip it, because it's been listed already
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if (device != null && device.bondState != BluetoothDevice.BOND_BONDED) {
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mNewDevicesArrayAdapter!!.add(
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"""
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${device.name}
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${device.address}
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""".trimIndent()
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)
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}
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// When discovery is finished, change the Activity title
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// } else if (BluetoothAdapter.ACTION_DISCOVERY_FINISHED == action) {
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// setProgressBarIndeterminateVisibility(false)
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// setTitle(R.string.select_device)
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// if (mNewDevicesArrayAdapter!!.count == 0) {
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// val noDevices = resources.getText(R.string.none_found).toString()
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// mNewDevicesArrayAdapter!!.add(noDevices)
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// }
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}
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}
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}
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companion object {
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/**
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* Tag for Log
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*/
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private const val TAG = "DeviceListActivity"
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/**
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* Return Intent extra
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*/
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var EXTRA_DEVICE_ADDRESS = "device_address"
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}
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}
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@ -0,0 +1,42 @@
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<?xml version="1.0" encoding="utf-8"?>
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<!-- Copyright (C) 2014 The Android Open Source Project
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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-->
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<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
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android:layout_width="match_parent"
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android:layout_height="match_parent"
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android:orientation="vertical"
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>
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<TextView
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android:id="@+id/title_paired_devices"
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android:layout_width="match_parent"
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android:layout_height="wrap_content"
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android:padding="24dp"
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android:textAppearance="?attr/textAppearanceHeadline6"
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android:text="Select Device"
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android:visibility="visible"
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/>
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<View
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android:id="@+id/divider"
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android:layout_width="match_parent"
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android:layout_height="1dp"
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android:background="?android:attr/listDivider" />
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<ListView
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android:id="@+id/paired_devices"
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android:layout_width="match_parent"
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android:layout_height="wrap_content"
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android:stackFromBottom="false"
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/>
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</LinearLayout>
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