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Android studio web service example

Check if foreground service is running android

Having a good integration with an external service is fundamental in mobile development. To have an optimal integration it is necessary to ensure the correct operation through integration tests.

With the appearance of Kotlin multiplatform, a very interesting scenario appears as it is to have a client of a REST API in a multiplatform library and that we can use it both from an Android application and from an iOS application.

In this article we are going to see how we can create a REST API client using Kotlin multiplatform and how to create the necessary integration tests to verify that our integration works correctly.

What infrastructure do we need, we need to have a way to set up a MockEngine where we can simulate a response and pass this MockEgine to our client in the constructor instead of a real one.

As you can see in this class, in the get function, we configure a MockEngine where depending on the encoded path, we are going to return a response with an http status code and a body that is passed to us in the enqueueMockResponse method.

Android serviceconnection

A bound service is the server of a client-server interface. It allows components (such as activities) to bind to the service, send requests, receive responses, and establish inter-process communications (IPC). A bound service is generally only active while serving another application component and does not run in the background indefinitely.

This document describes how to create a bound service, as well as how to establish a binding to the service from other application components. For additional information on services in general (e.g. how to send notifications from a service, how to configure the service to run in the foreground, etc.), please refer to the Services document.

As explained in the Services document, you can create a service that has already been started and bound. That is, the service can be started by calling startService(), which allows the service to run indefinitely, and you can also allow a client to bind to the service by calling bindService().

Tiny web server

In the following Java code example, a signature field named SignatureField1 is added to a PDF document based on a PDF file named Loan.pdf. The PDF document containing the new signature field is saved as a PDF file named LoanSig.pdf. (See Adding signature fields).

The following Java code example modifies a signature field named SignatureField1 by locking all form fields when a signature is applied to the signature field and ensuring that no changes are allowed. Once the signature service returns the PDF document containing the modified signature field, the PDF document is saved as a PDF file named LoanSig.pdf. (This example overwrites the PDF file that is passed to the signature service). (See Modifying signature fields).

The following Java code example digitally signs a PDF document based on a PDF file named LoanSig.pdf. The alias specified for the security credential is secure and the revocation check is performed. Since no CRL or OCSP server information is specified, the server information is obtained from the certificate used to digitally sign the PDF document. The signed document is saved as a PDF file named LoanSigned.pdf. (See Digitally signing PDF documents).

Android send message to service

To use Play app signing, you must be an account owner or a user with the Release to Production permission, exclude devices and use Play app signing, and agree to the Play App Signing Terms of Service.

Note: For apps created before August 2021, you can still upload an APK and manage your own keys instead of using Play’s app signing and publishing with an Android App Bundle. However, if you lose your keystore or it is compromised, you will not be able to update the app without publishing a new one with a different bundle name. For these apps, Play recommends using the Play app signature and opting for app bundles.

You can find the MD5, SHA-1 and SHA-256 fingerprints of the app upload and signing certificates on the Play App Signing page (Version > Settings > App Integrity) of the Play Console. To process other fingerprints, download the original certificate (.der) from the same page.

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