Android线性布局对齐中心和右侧

    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="按钮"
    android:layout_gravity="center_vertical|right" />

Button button = new Button(context);
button.setText("按钮");
LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams(
    LinearLayout.LayoutParams.WRAP_CONTENT,
    LinearLayout.LayoutParams.WRAP_CONTENT
);
layoutParams.gravity = Gravity.CENTER_VERTICAL | Gravity.RIGHT;
button.setLayoutParams(layoutParams);

    android:id="@+id/button"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="按钮"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintTop_toTopOf="parent"
    app:layout_constraintBottom_toBottomOf="parent" />