检查EditText是否为空kotlin android

import android.os.Bundle
import android.widget.Button
import android.widget.EditText
import android.widget.Toast
import androidx.appcompat.app.AppCompatActivity

class MainActivity : AppCompatActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)

        val editText = findViewById<EditText>(R.id.editText)
        val button = findViewById<Button>(R.id.button)

        button.setOnClickListener {
            if (editText.text.toString().isNotEmpty()) {
                Toast.makeText(this, "EditText is not empty", Toast.LENGTH_SHORT).show()
            } else {
                Toast.makeText(this, "EditText is empty", Toast.LENGTH_SHORT).show()
            }
        }
    }
}

if (editText.text.toString().trim().isNotEmpty()) {
    // EditText is not empty
} else {
    // EditText is empty
}

fun EditText.isInputEmpty(): Boolean {
    return this.text.toString().trim().isEmpty()
}

// 使用示例
if (editText.isInputEmpty()) {
    Toast.makeText(this, "EditText is empty", Toast.LENGTH_SHORT).show()
} else {
    Toast.makeText(this, "EditText is not empty", Toast.LENGTH_SHORT).show()
}