MediaPicker: Back button while using mediapicker (camera/file browser) closes app

Question

Hello everybody

We are creating an Xamarin Forms app, currently only for Android devices. In this app we're using the MediaPicker plugin to take a picture (MediaPicker.CapturePhotoAsync) and to load a picture from the phone's library (PickPhotoAsync). Our main view has two buttons on it. Each button uses one of the following MediaPicker methods: CapturePhotoAsync and PickPhotoAsync.

The button-clicked event looks like this:

This works. You can click the button and then pick a photo or take a new photo. However, when you are in the camera or file browser app, and you press the back button on the bottom of your screen, the app gets closed. I want the app to return to the main view, where the buttons are located. I don't see any options in the documentation that could help with this.

How can I return the my app, instead of closing it, when the back button is clicked while the camera app or photo picker app is open?

We navigate to the mainpage app from our login page using the following code:

We currently use Xamarin.Essentials version 1.6.1, Xamarin Forms version 4.8.0.1821 and we deploy to an Android 9.0 (API 28).

Any help with this would be much appreciated.

Thanks in advance and kind regards

Ruben

Answer 1

Hello,

Welcome to Microsoft Q&A!

However, when you are in the camera or file browser app, and you press the back button on the bottom of your screen, the app gets closed.

Are you referring to the hardware back button ?

Test with

• Xamarin.Forms 5.0.0.2012/ 4.8.0.1821
• Xamarin.Essentials 1.6.1
• Android 9.0 (API 28) simulator

Everything works as expected.

when I click on the button , it returns the app(where the buttons locates) .

Do you override the hardware back button clicking event in your project ?

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