如何在 EditText 中以不同颜色标记值?-移动开发问题

How to hashtag value in different colour in EditText?(如何在 EditText 中以不同颜色标记值?)

本文介绍了如何在 EditText 中以不同颜色标记值?的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

当我写 "#data" 时，我在 EditText 中写了一些文本，它的颜色应该改变但不会改变我该怎么做.请检查以下我使用过的EditText

I am writing some text in EditText when i write "#data" its colour should be changed but doesn't change how can i do. Please check the below EditText which i have used

<EditText
         android:id="@+id/et_simple"
         android:layout_height="wrap_content"
         android:layout_width="match_parent">
</EditText>

推荐答案

希望这个解决方案会有所帮助..！

Hope this solution will help..!

我使用了这个解决方案，非常有用！就像在你的 editText 上添加 textWatcher 接口并收听 textChange 并找出单词是否以 hashTag 开头然后调用该单词的 Change The color 方法！它有一些缺陷，但这些都是可以忽略不计的，请看这个简单的.

I used this solution it is very useful! like adding the textWatcher interface over your editText and listening to textChange and finding out if the word starts with a hashTag then call the Change The color method on that word! it has some flaws but those are ignorable see this simple one here.

Spannable mspanable;
int hashTagIsComing = 0;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);



    final EditText edtTxtMine = (EditText) findViewById(R.id.editText1);

    mspanable = edtTxtMine.getText();

    edtTxtMine.addTextChangedListener(new TextWatcher() {

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

            String startChar = null;

            try{
                startChar = Character.toString(s.charAt(start));
                Log.i(getClass().getSimpleName(), "CHARACTER OF NEW WORD: " + startChar);
            }
            catch(Exception ex){
                startChar = "";
            }

                if (startChar.equals("#")) {
                     changeTheColor(s.toString().substring(start), start, start + count);
                     hashTagIsComing++;
                }

                if(startChar.equals(" ")){
                    hashTagIsComing = 0;
                }

                if(hashTagIsComing != 0) {
                    changeTheColor(s.toString().substring(start), start, start + count);
                    hashTagIsComing++;
                }
        }

        @Override
        public void beforeTextChanged(CharSequence s, int start, int count,
                int after) {
            // TODO Auto-generated method stub

        }

        @Override
        public void afterTextChanged(Editable s) {
            // TODO Auto-generated method stub

        }
    });



}


private void changeTheColor(String s, int start, int end) {
    mspanable.setSpan(new ForegroundColorSpan(getResources().getColor(R.color.color)), start, end, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
}

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