Android App Development in Studio

Page 47

CHAPTER 4. JAVA BASICS

programming language. After learning Java, we‟ll use Android SDK libraries with Java and develop Android apps. We can use standalone Java compilers or Java-specific IDEs for learning Java. However it is also possible to try Java code in Android Studio with a simple trick. Since we already set up Android Studio, we will use it for Java coding here.

4.2. Using Android Studio for Java Coding First of all, we need to launch Android Studio and create an Android project as we did in the previous chapter. We can name the project as we want and select any Android version and any screen layout for now. When the project loads, the project files and folders will be like the following in the left pane of Android Studio:

Figure 4.1. Default file structure of a new Android Studio project We‟ll create a new Java file in order to try Java codes. For this, right click on one of the java folders such as com.example.atomic.javabasics1 in the above figure (or another Java folder in the project you created, your folder names will be different because your project name is different) and then select New  Java Class as shown in Figure 4.2.

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10.4. Building and Running the App

1min
pages 198-200

10.2. Designing the User Interface

1min
pages 186-189

10.3. Developing the Main Code

5min
pages 190-197

Emulator

1min
pages 182-184

9.2. Creating and Adding an Api Key

1min
pages 161-163

8.4. Building and Running the App

0
page 158

8.3. Writing the Main Code of the App

7min
pages 148-157

8.2. Designing the GUI of the App

0
pages 146-147

7.4. Building and Running the App

1min
pages 140-142

6.5. Developing the Main Code of the App

5min
pages 119-124

6.4. Adding and Positioning the Button

0
page 118

6.7. Final Notes

2min
pages 127-130

6.3. Adding the EditText Widgets

1min
pages 115-117

6.2. Adding and Positioning TextViews

2min
pages 112-114

5.4. Building and Running the App

1min
pages 107-110

5.2. Developing the User Interface

5min
pages 90-97

5.3. Writing the Main Code of the App

8min
pages 98-106

4.5. Loops in Java

5min
pages 69-73

4.6. Methods in Java

4min
pages 74-78

4.7. Classes, Objects and Inheritance in Java

6min
pages 79-86

4.4. Logical Decision Making Statements in Java

3min
pages 65-68

4.3. Variables in Java

12min
pages 53-64

4.2. Using Android Studio for Java Coding

6min
pages 47-52

1.2. How do Android Apps Work?

2min
pages 11-13

3.5. Building the User Interface

2min
pages 31-34

3.2. Creating a New Android Studio Project

3min
pages 24-27

3.6. Building the Project and Running on an Emulator

4min
pages 35-40

3.3. Main Sections of the IDE

0
page 28

2.2. Installation of Emulators

2min
pages 18-22

3.4. Folder and File Structure of an Android Studio Project

2min
pages 29-30

1.3. Programming Languages Used For Developing Android Apps

1min
page 14
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