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ClearableAutoCompleteTextView Kotlin
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| class ClearableAutoCompleteTextView @JvmOverloads constructor(context: Context, attrs: AttributeSet? = null, | |
| defStyleAttr: Int = android.R.attr.editTextStyle) | |
| : AutoCompleteTextView(context, attrs, defStyleAttr) { | |
| private val clearDrawable: Drawable? = ContextCompat.getDrawable(context, R.drawable.ic_clear) | |
| init { | |
| clearDrawable?.setBounds(0, 0, clearDrawable.intrinsicWidth, clearDrawable.intrinsicHeight) | |
| setOnTouchListener { _, event -> | |
| if (isClearDrawableVisible() && event.action == MotionEvent.ACTION_UP) { | |
| val clearDrawableClicked = event.x > width - paddingRight - (clearDrawable?.intrinsicWidth ?: 0) | |
| if (clearDrawableClicked) { | |
| setText("") | |
| return@setOnTouchListener true | |
| } | |
| } | |
| return@setOnTouchListener false | |
| } | |
| textWatcher { onTextChanged { text, _, _, _ -> setClearDrawableVisibility(!text.isNullOrEmpty()) } } | |
| } | |
| private fun isClearDrawableVisible(): Boolean { | |
| return compoundDrawables[2] != null | |
| } | |
| private fun setClearDrawableVisibility(visible: Boolean) { | |
| setCompoundDrawables(compoundDrawables[0], compoundDrawables[1], if (visible) clearDrawable else null, | |
| compoundDrawables[3]) | |
| } | |
| } |
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See also https://gist.github.com/hector6872/58d64be39128edf41527ed79a75e7108