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Android Switching Between Activities – Example

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If you are a beginner in Android development, the first thing you wish to do is to create two screens and try to switch from one screen to another. In this tutorial, you will learn how to create a basic Android application and move from one screen to another.

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Some of you make have known that the basic component of an Android application is Activity. And it can be considered as the screen visible to the user. Now let’s create two activities and switch from one activity to another when a button is pressed. The graphic which depicts the process is given below.


In Android Studio select File -> New -> New Project.

In the following screen enter a name for your App and a package name.

App Name: Activities

Domain: panayiotisgeorgiou.net

In the following screens select your minimum API level and then Empty Activity.

empty-activity api-level

Then enter the Activity Class name and a name for the XML layout.

Overall I have Created a new project with package name net.panayiotisgeorgiou.activities, Activity name MainActivity, and layout name activity_main.

Finally select finish, Gradle will build your project.

Now you have activity_main.xml in your layouts resource directory. Let’s add a button to that layout.


Creating Profile Activity

To the left of Android Studio, you will find Project Explorer. Right Click on the app from the project explorer and select,

New -> Activity -> Empty Activity

Enter a name for Activity and layout and select finish. Here I have entered ProfileActivity and activity_profile.

Let’s add some text to identify it as another Activity. We have added a TextView which displays the text “Hello User”. Also, we added a Button which helps to go back to our Main Activity.


Launching Profile Activity

Open MainActivity.java file and create a method which launches the Activity. Here I have created a method launchActivity() which has Intent defined and startActivity() method is called to launch Activity.

Now we need to call this launchActivity() method when the button is pressed, For that we need to attach an OnClickListener to that Button. It can be done by using the setOnClickListener() method. In this, we call the launchActivity() method.

Going back to Main Activity

Now you want to Go back to Main Activity. Let’s do this. Similarly, attach an OnClickListener to the Go Back button. Call the finish() method. The finish() is an Activity method which destroys the Profile Activity and we will be back in Main Activity.

Defining Activity in Manifest

As we created new Activity using the wizard, it should be automatically defined in Android Manifest file. If not add the Activity.

Consider Activities as a Stack. Initially, Main Activity is present which is at the top of the stack. When we launch Profile Activity the Main Activity goes to the bottom of the stack and Profile Activity comes to the top. When we call finish() the Activity is popped out of the stack and Main Activity comes back to its original position. The graphic given below depicts the Stack.

[alert type=white ]Happy coding! 🙂 Check out the source code on my github account[/alert]

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  1. […] Android Switching Between Activities – Example […]

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