Material button center icon only - Lập Trình Kotlin

Material button center icon only - Lập Trình Kotlin

Lập Trình Kotlin là một ngôn ngữ lập trình kiểu tĩnh chạy trên máy ảo Java và có thể được biên dịch sang mã nguồn Java hay sử dụng cơ sở hạ tầng trình biên dịch LLVM. Nó được tài trợ và phát triển bởi bởi JetBrains.

Step 1: MainActivity.kt

class MainActivity : AppCompatActivity() {

    override fun onCreate(savedInstanceState: Bundle?) {

        super.onCreate(savedInstanceState)

        setContentView(R.layout.activity_main)

        // programmatically make button icon only and center of button

        button5.setOnClickListener {

            (it as MaterialButton).apply {

                minimumWidth = 0

                minWidth = 0

                setPadding(

                    5.toDp(context),

                    5.toDp(context),

                    5.toDp(context),

                    5.toDp(context)

                )

                text = ""

                icon = getDrawable(R.drawable.ic_delete_forever)

                iconGravity = MaterialButton.ICON_GRAVITY_TEXT_START

                iconPadding = 0

            }

        }

    }

}

// extension method to convert pixels to dp

fun Int.toDp(context: Context):Int = TypedValue.applyDimension(

    TypedValue.COMPLEX_UNIT_DIP,this.toFloat(),context.resources.displayMetrics

).toInt()

Step 2: activity_main.xml

<?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"

    xmlns:tools="http://schemas.android.com/tools"

    android:id="@+id/constraintLayout"

    android:layout_width="match_parent"

    android:layout_height="match_parent"

    tools:context=".MainActivity">

    <com.google.android.material.button.MaterialButton

        android:id="@+id/button"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_marginTop="24dp"

        android:insetLeft="0dp"

        android:insetTop="0dp"

        android:insetRight="0dp"

        android:insetBottom="0dp"

        android:minWidth="0dp"

        android:text=""

        app:icon="@drawable/ic_delete_forever"

        app:iconGravity="textStart"

        app:iconPadding="0dp"

        app:layout_constraintEnd_toEndOf="parent"

        app:layout_constraintStart_toStartOf="parent"

        app:layout_constraintTop_toTopOf="parent" />

    <com.google.android.material.button.MaterialButton

        android:id="@+id/button2"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_marginTop="24dp"

        android:minWidth="0dp"

        android:minHeight="0dp"

        android:padding="5dp"

        app:icon="@drawable/ic_delete_forever"

        app:iconGravity="textStart"

        app:iconPadding="0dp"

        app:iconTint="#3D2B1F"

        app:iconTintMode="src_atop"

        app:layout_constraintEnd_toEndOf="parent"

        app:layout_constraintStart_toStartOf="parent"

        app:layout_constraintTop_toBottomOf="@+id/button" />

    <com.google.android.material.button.MaterialButton

        android:id="@+id/button3"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_marginTop="24dp"

        android:minWidth="0dp"

        android:minHeight="0dp"

        android:padding="0dp"

        app:icon="@drawable/ic_delete_forever"

        app:iconGravity="textStart"

        app:iconPadding="0dp"

        app:iconTint="#3D2B1F"

        app:iconTintMode="src_atop"

        app:layout_constraintEnd_toEndOf="parent"

        app:layout_constraintStart_toStartOf="parent"

        app:layout_constraintTop_toBottomOf="@+id/button2" />

    <com.google.android.material.button.MaterialButton

        android:id="@+id/button4"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_marginTop="24dp"

        android:minWidth="0dp"

        android:paddingStart="5dp"

        android:paddingEnd="5dp"

        app:icon="@drawable/ic_delete_forever"

        app:iconGravity="textEnd"

        app:iconPadding="0dp"

        app:iconSize="48dp"

        app:layout_constraintEnd_toEndOf="parent"

        app:layout_constraintStart_toStartOf="parent"

        app:layout_constraintTop_toBottomOf="@+id/button3" />

    <com.google.android.material.button.MaterialButton

        android:id="@+id/button5"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_marginTop="32dp"

        android:text="Click Me"

        app:layout_constraintEnd_toEndOf="parent"

        app:layout_constraintStart_toStartOf="parent"

        app:layout_constraintTop_toBottomOf="@+id/button4" />

    <com.google.android.material.button.MaterialButton

        android:id="@+id/button6"

        android:layout_width="32dp"

        android:layout_height="32dp"

        android:layout_marginTop="32dp"

        android:insetLeft="0dp"

        android:insetTop="0dp"

        android:insetRight="0dp"

        android:insetBottom="0dp"

        android:minWidth="0dp"

        android:text=""

        app:icon="@drawable/ic_delete_forever"

        app:iconGravity="textStart"

        app:iconPadding="0dp"

        app:layout_constraintEnd_toEndOf="parent"

        app:layout_constraintStart_toStartOf="parent"

        app:layout_constraintTop_toBottomOf="@+id/button5" />

</androidx.constraintlayout.widget.ConstraintLayout>

Kết quả: