Hello Readers! In this post, we are going to learn about how to use android imageButton widget in any android application. We will also go through different attributes of imageButton widget that can be used to customise it.
Output
Getting Started
Android ImageButton widget can be defined as below –
ImageButton is subclass of imageView that displays a button with an image that can be clicked or pressed by the user.
By default, imageButton looks like a simple button that changes states during different button states. You can use android:src attribute to set image on this imageButton view.
Attributes of Android ImageButton Widget
Some of the popular attributes of android imageButton widget inherited from ImageView are –
Sr. | XML Attributes | Description |
---|---|---|
1 | android:adjustViewBounds | This is responsible for auto adjust of view’s boundary to maintain the aspect ratio of it’s drawable. |
2 | android:baseline | It sets the offset of the baseline within this view. |
3 | android:baselineAlignBottom | If true, it sets the baseline aligned with it’s bottom edge. |
4 | android:cropToPadding | If true, image will be cropped to fit within it’s padding. |
5 | android:maxHeight | Sets maximum height of the view. |
6 | android:maxWidth | Sets maximum width of the view. |
7 | android:scaleType | It defines the way image will be resized or moved to match the size of the imageView |
8 | android:src | Sets a drawable of the imageView |
9 | android:tint | It tints the color of the image. |
10 | android:tintMode | Sets blending mode used to apply the image tint |
Some of the popular attributes of ImageButton inherited from View are –
Sr. | XML Attributes | Description |
---|---|---|
1 | android:alpha | Sets alpha of the view |
2 | android:autofillHints | Sets the data to be shown to auto fill in the view |
3 | android:background | Sets background of the view |
4 | android:backgroundTint | Sets tint to apply to the background |
5 | android:backgroundTintMode | Blending mode used to apply the background tint |
6 | android:clickable | Sets whether this view is clickable or not |
7 | android:elevation | Sets elevation to the view |
8 | android:fitsSystemWindows | It is used to adjust view layout based on system windows |
9 | android:focusable | Controls whether this view can take focus |
10 | android:id | Sets unique id to the view |
11 | android:onClick | Sets what to do when this view is clicked |
12 | android:padding | Sets padding to the view |
13 | android:tag | Sets tag to the view |
14 | android:tooltipText | Sets tooltip text to be shown when hovered on the view |
15 | android:visibility | Sets visibility of the view |
Example of Android ImageButton Widget
At first, we will create android application. Then, we will use imageButton widget in this application.
1. Creating New Project
Follow steps below to create new project. Please ignore the steps if you have already created a new application.
Step | Description |
---|---|
1. | Open Android Studio. |
2. | Go to File => New => New Project. Write application name as ImageButton. Then, click next button. |
3. | Select minimum SDK you need. However, we have selected 17 as minimum SDK. Then, click next button |
4. | Then, select Empty Activity => click next => click finish. |
5. | If you have followed above process correctly, you will get a newly created project successfully. However, you can also visit post to create a new project to know steps in detail. |
Now, we will modify xml and java file to use ImageButton widget in the application.
2. Modify Values folder
Open res/values/strings.xml file. Then, add below code into it.
<resources> <string name="app_name">ImageButton</string> <string name="this_is_imagebutton">This is imageButton</string> <string name="image_button_clicked">You clicked imageButton</string> </resources>
No other values folders have been modified. So, we are not going to mention them here.
3. Use ImageButton Widget in xml file
Open res/layout/activity_main.xml file. Then, add below code into it.
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" android:layout_width="match_parent" android:layout_height="match_parent" android:gravity="center"> <ImageButton android:id="@+id/imageButton" android:layout_width="wrap_content" android:layout_height="wrap_content" android:contentDescription="@string/this_is_imagebutton" app:srcCompat="@mipmap/ic_launcher"/> </LinearLayout>
In activity_main.xml file, we have used imageButton widget. Attribute app:srcCompat=”” is being used to set image to the imageButton widget. Now, we will access this widget in java file to perform some action on it.
4. Access imageButton Widget in java file
Open src/main/java/com.tutorialwing.imagebutton/MainActivity.java file. Then, add below code into it.
package com.tutorialwing.imagebutton; import android.os.Bundle; import android.support.v7.app.AppCompatActivity; import android.view.View; import android.widget.ImageButton; import android.widget.Toast; public class MainActivity extends AppCompatActivity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); ImageButton imageButton = findViewById(R.id.imageButton); if (imageButton != null) { imageButton.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { Toast.makeText(MainActivity.this, R.string.image_button_clicked, Toast.LENGTH_SHORT).show(); } }); } } }
Since AndroidManifest.xml file is very important in any android application, we are also going to see the content inside this file.
AndroidManifest.xml
Code inside src/main/AndroidManifest.xml file is as below –
<?xml version="1.0" encoding="utf-8"?> <manifest package="com.tutorialwing.imagebutton" xmlns:android="http://schemas.android.com/apk/res/android"> <application android:allowBackup="true" android:icon="@mipmap/ic_launcher" android:label="@string/app_name" android:roundIcon="@mipmap/ic_launcher_round" android:supportsRtl="true" android:theme="@style/AppTheme"> <activity android:name=".MainActivity"> <intent-filter> <action android:name="android.intent.action.MAIN"/> <category android:name="android.intent.category.LAUNCHER"/> </intent-filter> </activity> </application> </manifest>
When we run the program, we will get output as shown above.
That’s end of tutorial on Android ImageButton widget.
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