Android EditText獲取光標位置並插入字符刪除字符

1.獲取光標位置

int index = editText.getSelectionStart();

2.在光標處插入字符

int index = editText.getSelectionStart();
Editable editable = editText.getText();
editable.insert(index, "aaaa");

3.刪除光標前字符

int index = editText.getSelectionStart();
Editable editable = editText.getText();
editable.delete(index-1, index);