How to Create an Android App With Android Studio

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Introduction: How to Create an Android App With Android Studio

This tutorial will teach you the basics of how to build an Android app using the Android Studio development environment. As Android devices become increasingly more common, demand for new apps will only increase. Android Studio is an easy to use (and free) development environment to learn on. It's best if one has a working knowledge of the Java programming language for this tutorial because it is the language used by Android. There won't be much code used in this tutorial, so I will assume that you know enough Java to understand or are willing to look up what you don't know. This will take roughly 30-60 minutes, depending on how quickly you are able to download and install Android Studio. After using this tutorial to create your first Android app, you'll be well on your way to a fun new hobby or possibly even a promising career in mobile development.

Step 1: Install Android Studio

  1. Go to http://developer.android.com/sdk/index.html to download Android Studio.
  2. Use the installer to install Android Studio following its instructions.

Step 2: Open a New Project

  1. Open Android Studio.
  2. Under the "Quick Start" menu, select "Start a new Android Studio project."
  3. On the "Create New Project" window that opens, name your project "HelloWorld".
  4. If you choose to, set the company name as desired*.
  5. Note where the project file location is and change it if desired.
  6. Click "Next."
  7. Make sure on that "Phone and Tablet" is the only box that is checked.
  8. If you are planning to test the app on your phone, make sure the minimum SDK is below your phone's operating system level.
  9. Click "Next."
  10. Select "Blank Activity."
  11. Click "Next."
  12. Leave all of the Activity name fields as they are.
  13. Click "Finish."

*Note: It is typical naming convention in Android projects to set the company name as some form of "example.name.here.com".

Step 3: Edit the Welcome Message in the Main Activity

  1. Navigate to the activity_main.xml tab if it is not already open.
  2. Make sure that the Design tab is open on the activity_main.xml display.
  3. Click and drag the "Hello, world!" from the upper left corner of the phone display to the center of the screen.
  4. In the project file system on the left side of the window, open the values folder.
  5. In the values folder, double-click the strings.xml file.
  6. In this file, find the line "Hello world!".
  7. After the "Hello world!" message, add "Welcome to my app!"
  8. Navigate back to the activity_main.xml tab.
  9. Make sure that your centered text now reads "Hello world! Welcome to my app!"

Step 4: Add a Button to the Main Activity

  1. Navigate to the Design tab of the activity_main.xml display.
  2. In the Palette menu to the left of the phone display, find Button (under the heading Widgets).
  3. Click and drag Button to be centered underneath your welcome message.
  4. Make sure your button is still selected.
  5. In the Properties menu (on the right side of the window), scroll down to find the field for "text."
  6. Change the text from "New Button" to "Next Page."

Step 5: Create a Second Activity

  1. At the top of the project's file system tree, right click on "app."
  2. Navigate through to New > Activity > Blank Activity.
  3. Change the name of this activity to "SecondActivity".
  4. Click "Finish."
  5. Make sure you are in the Design view of activity_second.xml.
  6. Drag the text box in the upper left of the phone display down to the center as you did on the Main Activity.
  7. With the text box still selected, find the "id" field in the Properties menu on the right, and set it to "text2".
  8. Open strings.xml again.
  9. Add a new line under "Hello world! Welcome to my app!" that reads "Welcome to the second page!".
  10. Navigate back to activity_second.xml.
  11. Select the text box again.
  12. In the Properties pane, set the "text" field to "@string/second_page".
  13. Make sure that the text box now reads "Welcome to the second page!" and is in the center of the screen in the phone display.

Step 6: Write the Button's "onClick" Method

  1. Select the MainActivity.java tab along the top of the work environment.

2. Add the following lines of code at the end of the onCreate method:

Button button = (Button) findViewById(R.id.button);

button.setOnClickListener(new View.onClickListener() {

@Override

public void onClick(View v) {

goToSecondActivity();

}

});

3. Add the following method to the bottom of the MainActivity class:

private void goToSecondActivity() {

Intent intent = new Intent(this, SecondActivity.class);

startActivity(intent);

}

4. Click the + next to import at the third line of MainActivity.java to expand the import statements.

5. Add the following to the end of the import statements if they are not already there:

import android.content.Intent;

import android.view.View;

import android.widget.TextView;

Step 7: Test the Application

  1. Click the green play symbol from the toolbar at the top of the Android Studio window.
  2. When the "Choose Device" dialog apperas (this may take a few moments), select the "Lauch emulator" option.
  3. Click OK.
  4. When the emulator opens (this too could take awhile), the app will automatically launch the app upon the virtual phone being unlocked.
  5. Make sure that all of your text displays correctly and that the button takes you to the next page.

Step 8: Up, Up, and Away!

Congrats! You've now completed your first Android application with some basic functionality. Your finished app should have a page greeting the user and a button that takes the user to a second page.

From here you have the cursory knowledge you need to go on to learn all there is to know about Android application development.

20 People Made This Project!

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163 Discussions

1
jamesjang101
jamesjang101

Question 3 months ago

I don't have a background involved with Java in any form and because of which I've decided to start learning it from now on. But it's still very hard for me to understand the instructions of step 6. Can someone just post the whole code for me :P It would help a lot!

1
imrishiraj
imrishiraj

5 months ago on Step 3

My page is not reading the Welcome to my app in the centre as directed.Kindly guide me further. I am using the 3.6.3 version of the android studio.

0
eliwh2k12
eliwh2k12

Reply 5 months ago

Hi I am new as well and have had the same if not similar issue. You will have to create the string listed above in the strings.xml file. Next, you will need to click attributes on the right side of the screen.From there navigate to Declared Attributes and there will be a toggle titled text, click that and assign it the variable name of the string you created in strings.xml.

0
walexx520
walexx520

Question 5 months ago on Step 1

How can i link ads unit to the app

1
PasceeL
PasceeL

Tip 6 months ago

if you get an error, try capitalizing the second 'o' in this line:
button.setOnClickListener(new View.onClickListener() {


(step 6)

5
shuvoahme
shuvoahme

Tip 7 months ago

How can I create an Android App for Android phones?

0
shuvoahme
shuvoahme

Tip 7 months ago

How can I create an Android App for Android phones?

2
Frits van Zanten
Frits van Zanten

8 months ago on Step 1

Here it is not clear on which device you will be developing your app. Is it an Android device or, for instance, a laptop, or even a PC? The picture shows a laptop, but when you go testing, a few steps further down the road, you apparently are already on a phone or tablet, or is that a virtual environment? Here it is the question where to download to. Does it need to be a phone/tablet?

1
muhammadrahmatali6
muhammadrahmatali6

Question 11 months ago

I Develop a tv app that have online streaming from yotube when i test my app on android 6 it will not run properly but on higher versions it runs properly sooo what can i doo now

0
mominali2115
mominali2115

Answer 9 months ago

By your decription of the application it seem a if, it uses the cast screen or the screen share feature, that higher version of android provides. That might be the reason it doesn't work for lower version androids.

5
Dancun
Dancun

Question 10 months ago on Introduction

How can I create an Android App for Android phones?

0
MakN1
MakN1

Tip 11 months ago

U can't download

2
Wapz
Wapz

1 year ago on Step 2

what is the format of SDK in android

0
MakN1
MakN1

Reply 11 months ago

Did u find the format of sdk

2
MakN1
MakN1

Question 11 months ago

On my phone it not downloading what can I do

0
AmeyaK
AmeyaK

3 years ago

very helpful for beginner...!! Thanks

0
MariamM42
MariamM42

Reply 11 months ago

Create an app already?

0
MariamM42
MariamM42

11 months ago

Can someone send me the program has been prepared?