您可以:

1. 创建一个自定义视图，其中包含一个圆形形状和一个中间的TextView，然后您将字母放入其中

或

MaterialLetterIcon icon = new MaterialLetterIcon.Builder(context) //
            .shapeColor(getResources().getColor(R.color.circle_color))
            .shapeType(SHAPE.CIRCLE)
            .letter("YOUR FIRST LETTER GOES HERE")
            .letterColor(getResources().getColor(R.color.letter_color))
            .letterSize(26)
            .lettersNumber(1)
            .letterTypeface(yourTypeface)
            .initials(false)
            .initialsNumber(2)
            .create();

或此TextDrawable库

TextDrawable drawable1 = TextDrawable.builder()
                .buildRoundRect("YOUR LETTER GOES HERE", Color.RED, 10); // radius in px

TextDrawable drawable2 = TextDrawable.builder()
                .buildRound("YOUR LETTER GOES HERE", Color.RED);

使用@Skizo-Oziks提议的MaterialLetterIcon:

添加实现:

implementation 'com.github.ivbaranov:materiallettericon:0.2.3'

并在CardView内放置:

<androidx.constraintlayout.widget.ConstraintLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintTop_toTopOf="parent">


    <com.github.ivbaranov.mli.MaterialLetterIcon
        android:id="@+id/materialLetterIcon"
        android:layout_width="50dp"
        android:layout_height="50dp"
        android:layout_margin="5dp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:mli_letter="D"
        app:mli_shape_color="#01579B" />


    <TextView
        android:id="@+id/textView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginStart="24dp"
        android:layout_marginTop="2dp"
        android:text="debaish"
        android:textSize="18sp"
        android:textStyle="bold"
        app:layout_constraintStart_toEndOf="@+id/materialLetterIcon"
        app:layout_constraintTop_toTopOf="@+id/materialLetterIcon" />

    <TextView
        android:id="@+id/textView2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginStart="24dp"
        android:layout_marginBottom="2dp"
        android:text="2 days ago"
        app:layout_constraintBottom_toBottomOf="@+id/materialLetterIcon"
        app:layout_constraintStart_toEndOf="@+id/materialLetterIcon" />

</androidx.constraintlayout.widget.ConstraintLayout>

效果:

您可以使用以下库创建带有联系人首字母的头像。

TangoAgency/头像-查看