android studio intent to pass data between activities

Intent.putExtra('my-computer', computer) Say we have a Computer class, and we have an instance called computer.

Now, let’s see what happens if you try to pass arbitrary objects using the Intents. Okay, so at this point, things are pretty simple. StartActivity(new Intent(this, NextActivity.class) This means you can choose between writing code like the example above or chaining calls, like this: You can do the same with other primitive types, Strings, or arrays of primitives or Strings.Īt this point, you can signal that we intend to start a new Activity that will receive the Intent we just made, as you normally would with:Ī quick digression: In case you didn’t realize this, putExtra returns the calling object.

Intent intent = new Intent(this, NextActivity.class) For example, the following code will store an int variable called intToSend in an Intent, giving the int the key “my-int.” Primitives and Strings can easily be put into Intents. The bundle is one of the mechanisms through which Intents transfer data to other activities, and it is my main focus in this post. It’s the same structure you see every time you override an Activity’s onCreate method. This is a Bundle, storing key value pairs in which keys are Strings. Intent objects all have an extras property. In this post, I’ll discuss a few ways to pass data between Activities using Intents, including passing primitives, Strings, and object types. Often, you will want to pass information to the new Activity. One of the most common uses of Intents is to open a new Activity in your app. Android Intents are objects used to trigger actions from other Android Activities.

Android studio intent to pass data between activities