glureau

/**
 * Method to adjust (auto-size) the text size AND the images height.
 * This approach is based on width and lines instead of height, so you can use layout_heigt="wrap_content"
 * and the TextView height will adapt to the best font size (instead of hardcoded heights).
 * Idea of improvements: use layout_height value if hardcoded, and use current behaviour for match_parent or wrap_content.
 *
 * /!\  WARNING  /!\
 * You can define the min/max/granularity of autoSize with the standard appCompat definitions BUT you have to define the type to uniform.
 *         app:autoSizeTextType="uniform"
 *         app:autoSizeMaxTextSize="500sp"

glureau

interface DrawableHeightComputeMode {
    fun computeHeight(textPaint: TextPaint, text: CharSequence): Int
}

fun TextView.alignImageToText(textPaint: TextPaint, drawableHeightComputer: DrawableHeightComputeMode) {
    (text as? SpannedString)?.getSpans(0, text.length, DynamicDrawableSpan::class.java)?.forEach {
        val drawable = it.drawable
        val ratio = drawable.intrinsicWidth.toFloat() / drawable.intrinsicHeight
        val fontHeight = drawableHeightComputer.computeHeight(textPaint, text)
        val drawableWidth = truncate(fontHeight * ratio).toInt()

glureau

    private boolean suggestedSizeFitsInSpace(int suggestedSizeInPx, RectF availableSpace) {
        CharSequence text = mTextView.getText();
        TransformationMethod transformationMethod = mTextView.getTransformationMethod();
        if (transformationMethod != null) {
            CharSequence transformedText = transformationMethod.getTransformation(text, mTextView);
            if (transformedText != null) {
                text = transformedText;
            }
        }

glureau

/**********************************************************************************************************************
 * Remapping auto-size functionalities from AppCompatTextViewAutoSizeHelper.
 **********************************************************************************************************************/
fun AppCompatTextView.autoSizeTextAvailableSizes(): IntArray =
    invokeAndReturnWithDefault(this, "getAutoSizeTextAvailableSizes", IntArray(0))


/**********************************************************************************************************************
 * Copied from AppCompatTextViewAutoSizeHelper but adapted to AppCompatTextView.

glureau

class MediumActivity : AppCompatActivity() {

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_medium)

        tv3.text = "FOR <picto> DEVS"
        val drawable = ContextCompat.getDrawable(this, R.drawable.medium_logo_lowres)!!.apply {
            setBounds(0, 0, intrinsicWidth, intrinsicHeight)
        }

glureau

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
                                                   xmlns:app="http://schemas.android.com/apk/res-auto"
                                                   android:orientation="vertical"
                                                   android:layout_width="match_parent"
                                                   android:layout_height="match_parent">

    <ImageView
            android:layout_width="match_parent"
            android:layout_height="wrap_content"