android - 如何在 EditText 中以不同颜色标记值？

Question

我正在 EditText 中写一些文本，当我写 "#data" 时，它的颜色应该改变，但不会改变我该怎么做。请检查下面我用过的EditText

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

Answer 1

希望这个解决方案会有所帮助..!

我用过这个解决方案，它非常有用!比如在 editText 上添加 textWatcher 接口(interface)并监听 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，但可以忽略不计，请在此处查看这个简单的缺陷。

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);
}