在片段/活动中更改EditText的颜色

<EditText
    android:id="@+id/editText"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:textColor="@color/default_text_color" />

EditText editText = findViewById(R.id.editText);
editText.setTextColor(getResources().getColor(R.color.new_text_color));

<resources>
    <color name="default_text_color">#000000</color>
    <color name="new_text_color">#FF0000</color>
</resources>

editText.setOnFocusChangeListener(new View.OnFocusChangeListener() {
    @Override
    public void onFocusChange(View v, boolean hasFocus) {
        if (hasFocus) {
            editText.setTextColor(getResources().getColor(R.color.new_text_color));
        } else {
            editText.setTextColor(getResources().getColor(R.color.default_text_color));
        }
    }
});