editText多个电话号码每隔11位添加空格

editText多个电话号码每隔11位添加空格，代码很简单，如下

package com.tabbar.demo.activity;

import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.text.Editable;
import android.text.TextUtils;
import android.text.TextWatcher;
import android.widget.EditText;
import android.widget.Toast;

import com.tabbar.demo.R;
import com.tabbar.demo.util.ToolLog;

public class TestEditTextActivity extends AppCompatActivity {

    private EditText editText;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_edit_text_text);
        initView();
    }

    private void initView() {
        editText = (EditText) findViewById(R.id.editText);
        editText.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) {
                ToolLog.w("edit", "s:" + s + "\tstart:" + start + "\t before:" + before + "\tcount:" + count);
                if (s == null || s.length() == 0) return;
                StringBuilder sb = new StringBuilder();
                for (int i = 0; i < s.length(); i++) {
                    if (sb.length() % 12 != 0 && s.charAt(i) == ' ') {
                        continue;
                    } else {
                        sb.append(s.charAt(i));
                        if ((sb.length() % 12 == 0) && sb.charAt(sb.length() - 1) != ' ') {
                            sb.insert(sb.length() - 1, ' ');
                        }
                    }
                }
                if (!sb.toString().equals(s.toString())) {
                    int index = start;
                    //判断是输入还是删除，count>0，添加，count==0删除字符串
                    if (count != 0) {
                        index = start + 1;
                        if (sb.charAt(start) == ' ') {
                            if (before == 0) {
                                index++;
                            } else {
                                index--;
                            }
                        } else {
                            if (before == 1) {
                                index--;
                            }
                        }
                    } else {
                        //删除到空格时使用
                        index = sb.length();
                    }
                    editText.setText(sb.toString());
                    editText.setSelection(index);
                }
            }


            @Override
            public void afterTextChanged(Editable s) {

            }
        });
    }

    private void submit() {
        // validate
        String editTextString = editText.getText().toString().trim();
        if (TextUtils.isEmpty(editTextString)) {
            Toast.makeText(this, "editTextString不能为空", Toast.LENGTH_SHORT).show();
            return;
        }

        // TODO validate success, do something


    }
}