如何在Android中实现虚线EditText，虚线的颜色随输入而改变

<shape xmlns:android="http://schemas.android.com/apk/res/android">
    <stroke
        android:width="1dp"
        android:color="#000000"
        android:dashWidth="4dp"
        android:dashGap="4dp" />
</shape>

<EditText
    android:id="@+id/editText"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:background="@drawable/dashed_line" />

EditText editText = findViewById(R.id.editText);
editText.addTextChangedListener(new TextWatcher() {
    @Override
    public void beforeTextChanged(CharSequence s, int start, int count, int after) {
    }

    @Override
    public void onTextChanged(CharSequence s, int start, int before, int count) {
    }

    @Override
    public void afterTextChanged(Editable s) {
        // 获取输入的文本内容
        String inputText = s.toString();

        // 根据输入的文本内容来动态改变虚线的颜色
        if (inputText.isEmpty()) {
            editText.getBackground().setColorFilter(Color.RED, PorterDuff.Mode.SRC_IN);
        } else {
            editText.getBackground().setColorFilter(Color.GREEN, PorterDuff.Mode.SRC_IN);
        }
    }
});