After Installing as mentioned on Ionic 3, Angular 4 this backbutton is not invoking on android devices

[chaityashah]

I have Cordova Ionic application with Ionic3 and Angular 4, where I installed this plugin and configured the same way it is mentioned, however still I am not getting into the onbackbutton function on any page when pressing Hardware back button on android device. Tested on samsung galaxy s8 and s8 plus devices.

[rabamus]

Hi @chaityashah,

Could you possibly post an example of how you've used it?

Thanks,
Rob

[chaityashah]

So due to policy, I cannot share complete code, however I will post the file name where and how I have used this : possibly that might help you, and if anything further needed let me know.

so in my Ionic App,

1. app.module.ts

import { HardwareButtons } from '@scaffold-digital/ionic-hardware-buttons';
providers: [ HardwareButtons
  ]

2. Package.json
   "@scaffold-digital/ionic-hardware-buttons": "^1.1.0",

3. app.component.ts

import { HardwareButtons } from '@scaffold-digital/ionic-hardware-buttons';
constructor(
    public hardwareButtons: HardwareButtons
  ) {
    this.platform.ready().then(() => {
      hardwareButtons.init();
      if ( this.platform.getQueryParam("platform") !== undefined ){
        // pluginsLoader.load(this.platform.getQueryParam("platform"),this.platform.getQueryParam("version")).then(()=>{
    
        pluginsLoader.load(this.platform.getQueryParam("platform"),this.platform.getQueryParam("version"));
          document.addEventListener("deviceready", function(){
            curr.onDeviceReady(curr,true);
          }, false);
        
      }else{
        this.onDeviceReady(this,false);
      }
    });
  }

4. home.ts // This is my home page of the Application

import { BackButton } from '@scaffold-digital/ionic-hardware-buttons';
 @BackButton()
    public onBackButton() {
        alert('Back button pressed');
        return false;
    }

[chaityashah]

Is there any update ?

[omsysdesign]

I Found this error.

ERROR in node_modules/@scaffold-digital/ionic-hardware-buttons/dist/providers/hardware-buttons.d.ts(1,47): error TS2307:
Cannot find module 'ionic-angular'.
[ng]

Please any body help me

[jiaqi-xiao]

I Found this error.

ERROR in node_modules/@scaffold-digital/ionic-hardware-buttons/dist/providers/hardware-buttons.d.ts(1,47): error TS2307:
Cannot find module 'ionic-angular'.
[ng]

Please any body help me

You can use '@ionic/angular' instead of 'ionic-angular' but there's no 'App' and 'ViewController' in '@ionic/angular'. All in all, the version of this plugin is out of date.

[untilbit]

Could you upgrade this plugin for Ionic 4.

[abgrano]

Please update this plugin for ionic 4.

[rabamus]

Hi folks,

Am currently up to my eyes with various other things but I'll try and get this updated asap. In the mean time if anyone feels like taking a stab at it I'm happy to accept PRs 😃

Cheers,
Rob

[untilbit]

Hope you can update it soon.

[akildemir]

I am using Samsung S8 for testing and the decorator actually works. I mean I enter the inside the function but when I say this.navCtrl.pop() I get error that says navCtrl is not defined although it is defined in the constructor. Is the decorator tries to run before the constructor? Why can this happen?

[08Thug]

Dood are you gonna show interest in this isssue? @rabamus