无法更改EditText中部分文本的颜色

Question

I want to change the color of some part of text in EditText. I am trying following code, but it is not working.

SpannableStringBuilder ssb=new SpannableStringBuilder(expression);
ForegroundColorSpan fcs=new ForegroundColorSpan(Color.rgb(181,1,1));
ssb.setSpan(fcs,startIndex,endIndex,SpannableStringBuilder.SPAN_INCLUSIVE_INCLUSIVE);
expressionEditText.setText(ssb);
expressionTextView.setText(ssb);

startIndex and endIndex are the indices in the expression for which the color needs to be changed.

This code works fine for the 'expressionTextView' but not for 'expressionEditText'.

xml part:

<EditText
android:id="@+id/expression_edit_text"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginRight="16dp"
android:layout_above="@id/expression_text_view"
android:gravity="bottom|end"
android:includeFontPadding="false"
android:textSize="45sp"
android:background="@android:color/transparent"
android:inputType="text"/>

<TextView
android:id="@+id/expression_text_view"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginRight="16dp"
android:gravity="right"
android:textSize="50sp"/>

example:

expression="I want color to be changed";
startIndex=2;
endIndex=5;

In expressionTextView "wan" color will be the specified color. In expressionEditText there will not be any color change.

Answer 1

This is very simple.

As i answered before in this question .

You can achieve this by the following code, which i use always. I tried to make this method as simple as i could. You have to pass just your Editext and TextToHighLight in below method.

If you require clickable span you can go to my answer . Feel free to ask in comment if you need TextWatcher too.

public void setHighLightedText(EditText editText, String textToHighlight) {
    String tvt = editText.getText().toString();
    int ofe = tvt.indexOf(textToHighlight, 0);
    Spannable WordtoSpan = new SpannableString(editText.getText());

    for (int ofs = 0; ofs < tvt.length() && ofe != -1; ofs = ofe + 1) {


        ofe = tvt.indexOf(textToHighlight, ofs);
        if (ofe == -1)
            break;
        else {
            WordtoSpan.setSpan(new BackgroundColorSpan(0xFFFFFF00), ofe, ofe + textToHighlight.length(), Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
            editText.setText(WordtoSpan, TextView.BufferType.SPANNABLE);
        }
    }
}