How to search for a word in a string and highlight word in a text view in android?

for each word, you can use:

TextView textView = (TextView)findViewById(R.id.mytextview01);
//use a loop to change text color
Spannable WordtoSpan = new SpannableString("partial colored text");        
WordtoSpan.setSpan(new ForegroundColorSpan(Color.BLUE), 2, 4, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
textView.setText(WordtoSpan);

If I can understand you have the list of words and you want to find this words in text and highlight them so in this answer you have three input parameter:

1. full text.
2. yourList

3. yourTextview to show the result text

   String text = "full of your text";
   Spannable textSpannable = new SpannableString(text);
   
   for (int j =0 ; j<yourList.size() ; j++) {
       //word of your list
       String word = String.valueOf(yourList.get(j));
       //find index of words
       for (int i = -1; (i = text.indexOf(word, i + 1)) != -1; i++) {
           //find the length of word for set color
           int last = i + word.length();
           //set text color with spannable
           textSpannable.setSpan(new BackgroundColorSpan(Color.parseColor("#0cab8f")),
                   i, last, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
       }
   }
   yourTextView.setText(textSpannable);