android - 在编辑文本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();
    }
}

我也有一个拨号盘。当我在拨号盘中单击特定号码时，我需要将该号码添加到当前光标位置。另外，当我按下删除键时，我需要从当前光标位置删除数字。

拨号盘图片

Answer 1

试试下面的代码

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

这是从 EditText 中删除选定文本的代码

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