In this article, we will be building a Spin the Bottle Game Project using Java and XML in Android. The application is based on a multiplayer game. One player spins the bottle and the direction in which the bottle spins will determine the player who gets selected for a task or any other stuff. There will be a single activity in this application. A sample GIF is given below to get an idea about what we are going to do in this article.
Step by Step Implementation
Step 1: Create a New Project
To create a new project in Android Studio please refer to How to Create/Start a New Project in Android Studio. Note that select Java as the programming language.
Step 2: Before going to the coding section first you have to do some pre-task
- Add Bottle Image: Go to app -> res -> drawable and add this bottle image.
- Modify the colors.xml file:
Step 3: Working with the activity_main.xml file
The XML codes are used to build the structure of the activity as well as its styling part. It contains a TextView at the very top of the activity to show the title. Then it contains an ImageView of the bottle in the center of the activity. Below is the code for the activity_main.xml file.
Step 4: Working with the MainActivity.java file
We will create a function inside the Java file that will be called when the bottle’s image is clicked. Inside this function, we will generate a random number from 1-1800 that will be the direction of the image’s rotation. For this, we will be using the Random() function. We will create a method of RotateAnimation function that will have four parameters. The parameters are the initial direction, final direction, the pivot of rotation in the X direction, and the pivot of rotation in the Y direction. Since we want the image to rotate from the center we will make the center the pivot. Therefore:
- initial direction = 0,
- final direction = random generated number from 0 – 1800,
- pivotX = half of image width,
- pivotY = half of image height.
- After every spin initial direction = final direction.
Below is the code for the MainActivity.java file. Comments are added inside the code to understand the code in more detail.
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