In Android, Button represents a push button. A Push buttons can be clicked, or pressed by the user to perform an action. There are different types of buttons used in android such as CompoundButton, ToggleButton, RadioButton.
Button Tutorial With Examples In Android Studio
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Button is a subclass of TextView class and compound button is the subclass of Button class. On a button we can perform different actions or events like click event, pressed event, touch event etc.
Android buttons are GUI components which are sensible to taps (clicks) by the user. When the user taps/clicks on button in an Android app, the app can respond to the click/tap. These buttons can be divided into two categories: the first is Buttons with text on, and second is buttons with an image on. A button with images on can contain both an image and a text. Android buttons with images on are also called ImageButton.
Button code in XML:
The below code will create Button and write “Abhi Android” text on it.
Table Of Contents
Attributes of Button in Android:
Now let’s we discuss some important attributes that helps us to configure a Button in your xml file (layout).
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1. id: id is an attribute used to uniquely identify a text Button. Below is the example code in which we set the id of a Button.
2. gravity: The gravity attribute is an optional attribute which is used to control the alignment of the text like left, right, center, top, bottom, center_vertical, center_horizontal etc.
Below is the example code with explanation included in which we set the right and center vertical gravity for text of a Button.
3. text: text attribute is used to set the text in a Button. We can set the text in xml as well as in the java class.
Below is the example code with explanation included in which we set the text “Learning Android @ AbhiAndroid” in a Button.
Setting Text Using Java class:
Below is the example code in which we set the text on Button programmatically means in java class. The output will be same as the above.
4.textColor: textColor attribute is used to set the text color of a Button. Color value is in the form of “#argb”, “#rgb”, “#rrggbb”, or “#aarrggbb”.
Below is the example code with explanation included in which we set the red color for the displayed text of a Button.
Setting Text Color On Button Inside Java class:
Below is the example code in which we set the text color of a Button programmatically means in java class.
5. textSize: textSize attribute is used to set the size of the text on Button. We can set the text size in sp(scale independent pixel) or dp(density pixel).
Below is the example code in which we set the 25sp size for the text of a Button.
Setting textSize In Java class:
Below is the example code in which we set the text size of a Button programmatically means in java class.
6. textStyle: textStyle attribute is used to set the text style of a Button. The possible text styles are bold, italic and normal. If we need to use two or more styles for a Button then “|” operator is used for that.
Below is the example code with explanation included, in which we set the bold and italic text styles for text of a button.
7. background: background attribute is used to set the background of a Button. We can set a color or a drawable in the background of a Button.
Below is the example code in which we set the gren color for the background, Black color for the displayed text and set 15dp padding from all the side’s for Button.
Setting background in Button In Java class:
Below is the example code in which we set the background color of a Button programmatically means in java class.
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8. padding: padding attribute is used to set the padding from left, right, top or bottom. In above example code of background we also set the 10dp padding from all the side’s of button.
9. drawableBottom: drawableBottom is the drawable to be drawn to the below of the text.
Free game for android. Below is the example code in which we set the icon to the below of the text.
Make sure you have image saved in your drawable folder name ic_launcher.
10. drawableTop, drawableRight And drawableLeft: Just like the above attribute we can draw drawable to the left, right or top of text.
In the Below example we set the icon to the right of the text. In the same way you can do for other two attribute by your own:
Download Text Styler For Android App![]() Button Example In Android Studio:
Below is the example of button in which we display two buttons with different background and whenever a user click on the button the text of the button will be displayed in a toast.
Step 1:Create a new project in Android Studio and name it ButtonExample.
Step 2: Now open res -> layout -> xml (or) activity_main.xml and add following code. Here we are designing the UI of two button in Relative Layout.
Step 3: Now Open app -> package -> MainActivity.java and the following code. Here using setOnClickListener() method on button and using Toast we will display which button is clicked by user.
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Output:
Now start the AVD in Emulator and run the App. You will see two button. Click on any button and you will see the message on screen which button is clicked.
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