Question

我怎么能够拿到我在我的主谈中写的果园? 我想对这一数字进行核对,因为当我写了更多字时,我想使用警示。我如何能够简单地这样做?

Answer 1

使用TextWatcher,将EditText的果园计为:

private CharSequence temp;
    mEditText = (EditText)findViewById(R.id.ET);
        mEditText.addTextChangedListener(mTextWatcher);

        TextWatcher mTextWatcher = new TextWatcher() {
                @Override
                public void beforeTextChanged(CharSequence s, int arg1, int arg2,
                        int arg3) {
                    temp = s;
                }

                @Override
                public void onTextChanged(CharSequence s, int arg1, int arg2,
                        int arg3) {

                }

                @Override
                public void afterTextChanged(Editable s) {
                   // check here length of text in EditText after change
           if (temp.length() > 3) {
                // your alertdialog
        }
                }
            };

Answer 2

你们需要为此利用文本Watcher。

    yourEditText.addTextChangedListener(new TextWatcher() {

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

        }

        @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

        }
    });

采用任何方法跟踪数量,并在适用的情况下显示警惕

友情链接