Question

我正在尝试构建一个简单的蓝牙串行应用程序来连接到我的arduino。我现在正在使用ionic2来制作android app.right，我所要做的就是列出所有可用的蓝牙设备。以下是我的代码：

import { Component } from '@angular/core';
import { BluetoothSerial } from 'ionic-native';
import { NavController } from 'ionic-angular';

@Component({
  selector: 'page-home',
  templateUrl: 'home.html'
})
export class HomePage {

public working:string;
public var2: string ;

bluetoothSerial.isEnabled(
    function() {
        this.working= "Bluetooth is enabled";
    },
    function() {
        this.working="Bluetooth is *not* enabled";
    }
);

public lists = [];

bluetoothSerial.discoverUnpaired(function(devices) {
    this.lists.push(devices);
}, function(){  this.var2 = 'could not find any bluetooth device';});

  constructor() {  }

}

每当我做离子服务时，我都会犯很多错误，主要是因为无法识别蓝牙（缺少功能实现）。它也不允许我构建应用程序。

请帮忙。

非常感谢

Answer 1

查看文档

isEnabled()

平台：Android iOS Windows Phone

报告蓝牙是否已启用

返回：Promise返回一个承诺

一些事情。你不能这样称呼你的方法。你应该把你的BluetoothSerial大写你应该把它放在一个函数

中

import { Component } from '@angular/core';
import { BluetoothSerial } from 'ionic-native';
import { NavController } from 'ionic-angular';

@Component({
  selector: 'page-home',
  templateUrl: 'home.html'
})
export class HomePage {

public working:string;
public var2: string ;
public lists = [];

constructor(){
   this.getAlBluetoothDevices();
}

// put BluetoothSerial inside a function, can't be called different
getAllBluetoothDevices(){
    // async so keep everything in this method
    BluetoothSerial.isEnabled().then((data)=> {
        // not sure of returning value, probably a boolean
        console.log("dont know what it returns"+data);

        // returns all the available devices, not just the unpaired ones
        BluetoothSerial.list().then((allDevices) => {
            // set the list to returned value
            this.lists = allDevices;
            if(!this.lists.length > 0){
               this.var2 = "could not find any bluetooth devices";
            }
        });
    });
   }
}

}

Answer 2

以下代码用于扫描蓝牙设备

    startScanning(){
        this.isScanning =true;
          this.bluetoothSerial.isEnabled().then(()=>{
            this.bluetoothSerial.discoverUnpaired().then((allDevices)=>{
                this.devices=allDevices;
                this.isScanning =false;
            });
        });

此代码用于连接设备

onDeviceReady(){
  let device = this.navParams.get('device');


        this.bluetoothSerial.connect(device.id).subscribe((data)=>{
            let alert = this.alertCtrl.create({
                title: 'Bluetooth',
                subTitle: data,
                buttons: ['ok']
                });
                alert.present();
        },error=>{
            let alert = this.alertCtrl.create({
                title: 'Bluetooth',
                subTitle: error,
                buttons: ['ok']
                });
                alert.present();
        });

  }

注意：这对我有用

蓝牙串行离子2

2 个答案: