Android采取ContentObserver方式自动获取验证码

/** * Created by weifeiyang on 2016/7/29 0029. */import android.app.Activity;import android.content.SharedPreferences;import android.database.ContentObserver;import android.database.Cursor;import android.net.Uri;import android.os.Handler;import android.text.TextUtils;import android.widget.EditText;import java.util.regex.Matcher;import java.util.regex.Pattern;/** * 读取短信验证码，并设置验证码 * Created by cool on 2016/1/4. */public class ReadSmsContent extends ContentObserver { private Cursor cursor = null; private Activity mActivity; private EditText mEditText; public ReadSmsContent(Handler handler, Activity activity, EditText editText) {  super(handler);  this.mActivity = activity;  this.mEditText = editText; } @Override public void onChange(boolean selfChange, Uri uri) { /*  第一次回调 不是我们想要的 直接返回  目前发现每次收到新短信都会走好几次onChange(),  可以通过这个方法来使得onChange中的方法只走一次 */  if (uri.toString().equals("content://sms/raw")) {   return;  }  /*   读取收件箱中的短信   address 发件人手机号码:   body 信息内容:   read 是否查看:   date 发送时间:   */  cursor = mActivity.getContentResolver().query(Uri.parse("content://sms/inbox"),    new String[]{"_id", "address", "body", "read"}, null, null, "_id desc");//按降序排列//  指定号码//  mActivity.managedQuery(Uri.parse("content://sms/inbox"),//    new String[]{"_id", "address", "body", "read"}, "address=? and read=?", new String[]{"10086", "0"}, "_id desc");  if (null != cursor && cursor.getCount() > 0) {   cursor.moveToNext();//指向首位   int smsbodyColumn = cursor.getColumnIndex("body");//body位置   String smsBody = cursor.getString(smsbodyColumn);//获取内容   String verifyCode = getDynamicPassword(smsBody);   if (TextUtils.isEmpty(verifyCode)) {    return;   }   if (mEditText == null) {    throw new RuntimeException("你传的EditText为空");   }   if (verifyCode.contains("你从服务器上获取到的验证码"))) {    mEditText.setText(verifyCode);    //EditText获取焦点，3个属性必须同时设置    mEditText.setFocusable(true);    mEditText.setFocusableInTouchMode(true);    mEditText.requestFocus();    mEditText.setSelection(verifyCode.length());//设置光标位置   }  }  if (!cursor.isClosed()) {   cursor.close();  } } /**  * 从字符串中截取连续4位数字  * 用于从短信中获取动态密码  *  * @param str 短信内容  * @return 截取得到的4位动态密码  */ public static String getDynamicPassword(String str) {  Pattern continuousNumberPattern = Pattern.compile("[0-9//.]+");  Matcher m = continuousNumberPattern.matcher(str);  String dynamicPassword = "";  while (m.find()) {   if (m.group().length() == 4) {    dynamicPassword = m.group();   }  }  return dynamicPassword; }}

 /**  * 初始化短信监听数据库  */ private void initSmSContentObserver() {  readSmsContent = new ReadSmsContent(new Handler(), this, seCodeEditText);  //注册短信内容监听  this.getContentResolver().registerContentObserver(Uri.parse("content://sms/"), true, readSmsContent); }