先來效果圖：

設置手機格式化操作只需要設置EditText的addTextChangedListener的監聽，下面看代碼

 /*editText輸入監聽*/
        et_activity_up_login_phone.addTextChangedListener(new TextWatcher() {
            @Override
            public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2) {

            }

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

                if (s == null || s.length() == 0) return;
                StringBuilder sb = new StringBuilder();
                for (int i = 0; i < s.length(); i++) {
                    if (i != 3 && i != 8 && s.charAt(i) == ‘-‘) {
                        
 
continue;
                    } else {
                        sb.append(s.charAt(i));
                        if ((sb.length() == 4 || sb.length() == 9) && sb.charAt(sb.length() - 1) != ‘-‘) {
                            sb.insert(sb.length() - 1, ‘-‘);
                        }
                    }
                }
                
 
if (!sb.toString().equals(s.toString())) {
                    int index = start + 1;
                    if (sb.charAt(start) == ‘-‘) {
                        if (before == 0) {
                            index++;
                        } else {
                            index--;
                        }
                    } else {
                        if (before == 1) {
                            index--;
                        }
                    }
                    et_activity_up_login_phone.setText(sb.toString());
                    et_activity_up_login_phone.setSelection(index);
                }
            }

            @Override
            public void afterTextChanged(Editable editable) {
                //獲取沒有-的手機號
                endPhone = et_activity_up_login_phone.getText().toString().replace("-", "");

                if (endPhone.length() == 11) {//如果最後的 號碼為11位
                    //判斷手機號是否正確
                    if (!Tool.isPhoneNum(endPhone)) {
                        Toast.makeText(UpLoginActivity.this, "請輸入正確的手機號：" + endPhone, Toast.LENGTH_SHORT).show();
                    } else {
                        //改變獲取驗證碼字體顏色
                        tv_activity_up_login_djs.setTextColor(Color.parseColor("#64aaff"));//高亮，可以點擊
                        djsType = true;//設置驗證碼為可點擊狀態
                        tv_activity_up_login_djs.setClickable(true);
                    }
                }
            }
        });
    }

Android EditText手機號格式化輸入XXX-XXXX-XXXX