Android Tutorial

Software Setup and Configuration

Android Studio

File Structure

Components

Core Topics

Layout

View

Button

Intent and Intent Filters

Toast

RecyclerView

Fragments

Adapters

Other UI Component

Image Loading Libraries

Date and Time

Material Design

Bars

Working with Google Maps

Chart

Animation

Database

Advance Android

Jetpack

Architecture

App Publish

App Monetization

Autosizing TextView in Android

Introduced in Android 8.0 (API level 26), autosizing TextView allows developers to make text dynamically adjust its size based on the boundaries of its layout. Instead of fixing the text size, you can specify how the text size should adjust to fit its dimensions.

Implementing Autosizing TextView

  1. XML Implementation:

    You can specify the autosizing directly in the XML:

    <TextView
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:autoSizeTextType="uniform"
    android:autoSizeMinTextSize="12sp"
    android:autoSizeMaxTextSize="100sp"
    android:autoSizeStepGranularity="2sp"
    android:text="This is an autosizing TextView example." />

    Key attributes:

    • autoSizeTextType: Specifies the type of autosizing. uniform means it will resize uniformly across multiple lines.
    • autoSizeMinTextSize: The minimum text size.
    • autoSizeMaxTextSize: The maximum text size.
    • autoSizeStepGranularity: The interval to jump between sizes during autosizing. For example, 2sp means it will try 12sp, 14sp, 16sp, and so on.

  2. Preset Sizes:

    Instead of providing a range (min, max) and granularity, you can also specify specific text sizes that the TextView should use:

    <TextView
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:autoSizeTextType="uniform"
    android:autoSizePresetSizes="@array/presetSizes"
    android:text="This is another autosizing TextView example." />

    In res/values/arrays.xml:

    <resources>
    <array name="presetSizes">
        <item>12sp</item>
        <item>20sp</item>
        <item>40sp</item>
    </array>
</resources>

  3. Programmatic Implementation:

    You can also control autosizing programmatically:

    val textView: TextView = findViewById(R.id.textView)
textView.setAutoSizeTextTypeWithDefaults(TextView.AUTO_SIZE_TEXT_TYPE_UNIFORM)

    For more control, such as when specifying a range:

    textView.setAutoSizeTextTypeUniformWithConfiguration(
    12, // Minimum size
    100, // Maximum size
    2, // Step granularity
    TypedValue.COMPLEX_UNIT_SP // Unit
)

    Or when using preset sizes:

    val sizes = intArrayOf(12, 20, 40)
textView.setAutoSizeTextTypeUniformWithPresetSizes(sizes, TypedValue.COMPLEX_UNIT_SP)

Benefits:

Autosizing TextView is particularly useful when you're unsure of the amount of content that will be in a TextView or when you're dealing with dynamic content sizes and want to ensure text remains legible and fits within its bounds.

Remember, while autosizing can be a powerful feature, you should always check and test the final appearance on various devices and screen sizes to ensure legibility and a consistent design.

  1. How to use autosizing TextView in Android:

    • Description: Autosizing TextView in Android allows dynamic adjustment of text size to fit within a TextView without manual intervention.
    • Code (Kotlin):
      val textView = findViewById<TextView>(R.id.myTextView)
TextViewCompat.setAutoSizeTextTypeWithDefaults(textView, TextViewCompat.AUTO_SIZE_TEXT_TYPE_UNIFORM)
TextViewCompat.setAutoSizeTextTypeUniformWithConfiguration(
    textView, 8, 24, 2, TypedValue.COMPLEX_UNIT_SP
)

  2. Autosizing TextView with example in Kotlin:

    • Description: A simple example demonstrating autosizing TextView in Kotlin.
    • Code (Kotlin):
      val textView = findViewById<TextView>(R.id.myTextView)
TextViewCompat.setAutoSizeTextTypeWithDefaults(textView, TextViewCompat.AUTO_SIZE_TEXT_TYPE_UNIFORM)

  3. Dynamic text size in Android TextView:

    • Description: Achieve dynamic text sizing by allowing the TextView to adjust its text size based on content and layout constraints.
    • Code (Kotlin):
      val textView = findViewById<TextView>(R.id.myTextView)
textView.text = "Dynamic Text Example"
textView.setAutoSizeTextTypeWithDefaults(TextView.AUTO_SIZE_TEXT_TYPE_UNIFORM)

  4. Programmatically set autosizing TextView in Android:

    • Description: Set autosizing properties programmatically for a TextView.
    • Code (Kotlin):
      val textView = findViewById<TextView>(R.id.myTextView)
textView.setAutoSizeTextTypeWithDefaults(TextView.AUTO_SIZE_TEXT_TYPE_UNIFORM)
textView.setAutoSizeTextTypeUniformWithConfiguration(8, 24, 2, TypedValue.COMPLEX_UNIT_SP)

  5. Using autosizeTextType attribute in TextView:

    • Description: Utilize the autosizeTextType attribute in XML to define the autosizing behavior.
    • Code (XML):
      <TextView
    android:id="@+id/myTextView"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    app:autosizeTextType="uniform"
    app:autoSizeMinTextSize="8sp"
    app:autoSizeMaxTextSize="24sp"
    app:autoSizeStepGranularity="2sp"/>

  6. Autosizing TextView with XML attributes in Android:

    • Description: Define autosizing properties directly in the XML layout file.
    • Code (XML):
      <TextView
    android:id="@+id/myTextView"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    app:autosizeTextType="uniform"
    app:autoSizeMinTextSize="8sp"
    app:autoSizeMaxTextSize="24sp"
    app:autoSizeStepGranularity="2sp"/>

  7. TextView auto-sizing with support library:

    • Description: Use the support library to ensure compatibility with older Android versions.
    • Code (Kotlin):
      val textView = findViewById<TextView>(R.id.myTextView)
TextViewCompat.setAutoSizeTextTypeWithDefaults(textView, TextViewCompat.AUTO_SIZE_TEXT_TYPE_UNIFORM)

  8. Customizing autosizing behavior in Android:

    • Description: Customize autosizing behavior based on specific requirements.
    • Code (Kotlin):
      val textView = findViewById<TextView>(R.id.myTextView)
textView.setAutoSizeTextTypeWithDefaults(TextView.AUTO_SIZE_TEXT_TYPE_UNIFORM)
textView.setAutoSizeTextTypeUniformWithConfiguration(8, 24, 2, TypedValue.COMPLEX_UNIT_SP)
Copyright © devanddep.com | All Rights Reserved