在编辑文本中的光标位置之间插入字符

Question

我的代码是：

EditText edt

    edt.addTextChangedListener(new TextWatcher() {

            @Override
            public void afterTextChanged(Editable arg0) {

            final String number = edt.getText().toString();

            int count = arg0.length();
            edt.setSelection(count);

        }

                    }

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

            }

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

            final String number = edt.getText().toString();

                    }

我也有拨号盘。当我点击拨号盘中的特定号码时，我需要将该号码添加到当前光标位置。此外，当我按删除时，我需要从当前光标位置删除该数字。

拨号盘图片

Answer 1

尝试以下代码

int start =editText.getSelectionStart(); //this is to get the the cursor position
String s = "Some string";
editText.getText().insert(start, s); //this will get the text and insert the String s into   the current position

以下是从EditText中删除所选文本的代码

int start = t1.getSelectionStart();  //getting cursor starting position
int end = t1.getSelectionEnd();      //getting cursor ending position
String selectedStr = t1.getText().toString().substring(start, end);    //getting the selected Text
t1.setText(t1.getText().toString().replace(selectedStr, ""));    //replacing the selected text with empty String and setting it to EditText

Answer 2

您需要为按钮实施OnClickListener。在那里你需要更新编辑器的文本。例如，对于'5'按钮：

public void onClick(View v) {

    String currentText = edt.getText();
    edt.setText(currentText + "5");
}

Answer 3

要插入：

    String dialled_nos = dialpad_text.getText().toString();
    String number = view.getTag().toString(); // 1,2....9,0
    int start = dialpad_text.getSelectionStart(); 
    dialled_nos = new StringBuilder(dialled_nos).insert(start, number).toString();
    dialpad_text.setText(dialled_nos);
    dialpad_text.setSelection(start+1); // cursor will move to new position

删除：

    String dialled_nos = dialpad_text.getText().toString();
    int remove_index_position = dialpad_text.getSelectionStart()-1; 
    StringBuilder dialled_nos_builder = new StringBuilder(dialled_nos);
    if(remove_index_position>=0) {
        dialled_nos_builder.deleteCharAt(remove_index_position);
        dialpad_text.setText(dialled_nos_builder.toString()); 
        dialpad_text.setSelection(remove_index_position);
    }

Answer 4

etPnr.addTextChangedListener(new TextWatcher() {
        @Override
        public void beforeTextChanged(CharSequence s, int start, int count, int after) {
        }

        @Override
        public void onTextChanged(CharSequence s, int start, int before, int count) {
            etPnr.removeTextChangedListener(this);

            // TODO: If you want to do on the text, apply here

            if (start + count > etPnr.length())
                etPnr.setSelection(etPnr.length());
            else
                etPnr.setSelection(start + count);

            etPnr.addTextChangedListener(this);
        }

        @Override
        public void afterTextChanged(Editable s) {
        }
    });

你可以尝试一下

Answer 5

editText.getText().insert(editText.getSelectionStart(), text);

text是您要插入的实际字符串。

Answer 6

我目前使用此解决方案：

h function_name