使用自动完成时TextInputLayout背景颜色更改

<com.google.android.material.textfield.TextInputLayout
    android:id="@+id/textInputLayout"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:background="@color/your_color">

    <EditText
        android:id="@+id/editText"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:hint="Enter text" />

</com.google.android.material.textfield.TextInputLayout>

TextInputLayout textInputLayout = findViewById(R.id.textInputLayout);
textInputLayout.setBackgroundTintList(ColorStateList.valueOf(getResources().getColor(R.color.your_color)));