正则表达式完成号码验证，
^以某开头，[] 字符集（匹配中括号里面的任意字符），\d是任意一个数字，{n}表示出现了多少次，$结尾
手机号的正则 ^1[34568]\d{9}$，以1开头，第二个数字是34568，剩下九个都是数字，数字结尾
调用String对象的match()方法，参数：正则（里面的斜杠\需要转义）
if (phone.matches("^1[34568]\\d{9}$")) {
SQLiteDatabase db = SQLiteDatabase.openDatabase(path, null,
SQLiteDatabase.OPEN_READONLY);
Cursor cursor = db
.rawQuery(
"select location from data2 where id=(select outkey from data1 where id=?)",
new String[] { phone.substring(0, 7) });
while (cursor.moveToNext()) {
String address = cursor.getString(0);
return address;
}
cursor.close();
}
文本输入直接查询
调用EditText对象的addTextChangedListener()方法，添加监听器，参数：TextWatcher对象
匿名内部类实现TextWatcher接口，重写onTextChanged方法，传递进来CharSequence对象
查询数据库，并展示出结果
//自动完成
et_phone.addTextChangedListener(new TextWatcher() { @Override
public void onTextChanged(CharSequence s, int arg1, int arg2, int arg3) {
phone = et_phone.getText().toString().trim();
String result = NumberQueryAddressUtil.queryAddress(phone);
tv_address.setText(result);
} @Override
public void beforeTextChanged(CharSequence arg0, int arg1, int arg2,
int arg3) {
// TODO Auto-generated method stub } @Override
public void afterTextChanged(Editable arg0) {
// TODO Auto-generated method stub }
});