Inter-app interaction is the communication that allows your Android app to interact with other programs. This kind of interaction usually takes into account the protection of intents and the app parts.

1- Securing Outgoing Intents

In Android purposes, in some cases we launch intents to other apps in the device. These intents can be explicit or implicit—the express ones are managed by using your code, but the implicit kinds are handled by other applications. And for that, the outgoing intents have to be secured in some method.

The difficulty here is that the consumer might set an app as the default for some steps, which can trigger a issue when these actions involve delicate user information and facts. In these scenarios, the consumer is no for a longer period specified an solution to pick out a dependable app with this delicate information and facts.

To clear up this, we’ll use some thing identified as an app chooser, which essentially begins any time you want to start an implicit intent. An app chooser dialog pops up even if the person has earlier set a default app. Right here is a code sample:

2- Securing Incoming Intents

Say you really do not want to expose your activity or your material company (or any ingredient) to other purposes, and you want to enable only the applications you control or own.

For that, you can use signature-based authorization that lets only your applications that are signed with the exact signing essential share details amongst them. The great point is that this sort of permission doesn’t involve user affirmation and are granted at install time.

The way to do that is to define permission in the manifest file:

android:protectionLevel=”signature” />

And then utilize this permission to the component you want to make non-public to the applications you very own:


3- Securing factors

At last, if you want to protect against access from any other software to your elements, you can use the mechanism supplied by the Android OS.

We usually use it to avert obtain to the written content service provider that holds sensitive application knowledge (you can also implement it to activities and other elements).

You basically specify android:exported="untrue" in the manifest inside the element you want to disallow obtain to. Bear in mind that the android:exported tag is established to legitimate by default.

Here is an implementation sample:


The formal Android documentation supplies a great deal of policies and finest methods that can assist strengthen your application. Right here are the greatest practices you will need to comply with.

You can just take a look at this checklist that features a set of standards that be certain the safety of person info.

For far more data about the certificate pinning verify out this write-up.

And lastly, here’s the documentation for the Network Security Configuration, which covers all the available functions and rules.

I hope you savored this appear at different approaches and solutions for securing your Android apps. Android supplies a protection layer by default that you can build on best of in order to attain far more protection and ensure user basic safety. Whether or not you are creating an Android application for billions of buyers, or for a choose few, the security of your buyers should really be your to start with precedence in order to prevent the loss or exposure of delicate consumer information.