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TextView extension functions to easily implement reactivity.
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import android.widget.TextView | |
import androidx.core.widget.doAfterTextChanged | |
// Source: https://stackoverflow.com/questions/9385081/how-can-i-change-the-edittext-text-without-triggering-the-text-watcher | |
/** | |
* Whenever the user makes a change to the text | |
* the action parameter will be triggered. | |
* | |
* This function is meant to be used with [setTextIfDistinct] | |
* to avoid triggering the action if the text hasn't changed from user input. | |
*/ | |
inline fun TextView.onTextChanged( | |
crossinline action: (String) -> Unit, | |
) { | |
doAfterTextChanged { | |
if (hasFocus()) { | |
action(it.toString()) | |
} | |
} | |
} | |
/** | |
* Sets the text only if is distinct. | |
* | |
* This is useful to avoid triggering the action if the text hasn't changed from user input. | |
* | |
* This extension function is meant to be used with [onTextChanged]. | |
*/ | |
fun TextView.setTextIfDistinct(text: String?) { | |
val hasFocus = hasFocus() | |
if (hasFocus) { | |
clearFocus() | |
} | |
if (this.text.toString() != text) { | |
this.text = text | |
} | |
if (hasFocus) { | |
requestFocus() | |
} | |
} |
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