Android自动读取短信验证码 Android自动读取短信验证码

实现自动获取手机的短信验证码，原理通过监听短信数据库的变化来解析短信，获取验证码。

直接附上代码：

1.建立一个监听数据库的类

import java.util.regex.Matcher;
import java.util.regex.Pattern;

import android.app.Activity;
import android.database.ContentObserver;
import android.database.Cursor;
import android.net.Uri;
import android.os.Handler;
import android.widget.EditText;

/**
 * 监听短信数据库，自动获取短信验证码
 * 
 * @author 贾亚光
 * @date 2015-3-25
 *
 */
public class AutoGetCode extends ContentObserver {
    private Cursor cursor = null;
    private Activity activity;

    private String smsContent = "";
    private EditText editText = null;

    public AutoGetCode(Activity activity, Handler handler, EditText edittext) {
        super(handler);
        this.activity = activity;
        this.editText = edittext;
    }

    @Override
    public void onChange(boolean selfChange) {
        super.onChange(selfChange);
        // 读取收件箱中指定号码的短信
        cursor = activity.managedQuery(Uri.parse("content://sms/inbox"),
                new String[] { "_id", "address", "read", "body" }, "address=? and read=?",
                new String[] {"你要截获的电话号码", "0" }, "_id desc");
        // 按短信id排序，如果按date排序的话，修改手机时间后，读取的短信就不准了
        if (cursor != null && cursor.getCount() > 0) {
            cursor.moveToFirst();
            if (cursor.moveToFirst()) {
                String smsbody = cursor
                        .getString(cursor.getColumnIndex("body"));
                String regEx = "(?<![0-9])([0-9]{" + 6 + "})(?![0-9])";
                Pattern p = Pattern.compile(regEx);
                Matcher m = p.matcher(smsbody.toString());
                while (m.find()) {
                    smsContent = m.group();
                    editText.setText(smsContent);
                }
            }
        }
    }

/**
* 从短信字符窜提取验证码
* @param body 短信内容
* @param YZMLENGTH 验证码的长度 一般6位或者4位
* @return 接取出来的验证码
*/
public static String getyzm(String body, int YZMLENGTH) {
// 首先([a-zA-Z0-9]{YZMLENGTH})是得到一个连续的六位数字字母组合
// (?<![a-zA-Z0-9])负向断言([0-9]{YZMLENGTH})前面不能有数字
// (?![a-zA-Z0-9])断言([0-9]{YZMLENGTH})后面不能有数字出现
Pattern p = Pattern
.compile("(?<![a-zA-Z0-9])([a-zA-Z0-9]{" + YZMLENGTH + "})(?![a-zA-Z0-9])");
Matcher m = p.matcher(body);
if (m.find()) {
System.out.println(m.group());
return m.group(0);
}
return null;
}

}

2.在使用的时候在activity中注册

AutoGetCode autoGetCode = new AutoGetCode(RegistCode.this, new Handler(),
                regist_code);//regist_code 要显示验证码的EditText
        // 注册短信变化监听
        this.getContentResolver().registerContentObserver(
                Uri.parse("content://sms/"), true, autoGetCode);

3.在合适的地方取消注册

@Override
    protected void onDestroy() {
        // TODO Auto-generated method stub
        super.onDestroy();
        this.getContentResolver().unregisterContentObserver(autoGetCode);
    }

4.最后别忘记了添加权限

 <!-- 读写短信的权限 -->
    <uses-permission android:name="android.permission.RECEIVE_SMS" />
    <uses-permission android:name="android.permission.READ_SMS" />
    <uses-permission android:name="android.permission.SEND_SMS" />
    <uses-permission android:name="android.permission.WRITE_SMS" />

这样就可以了。

参考资料：

http://blog.sina.com.cn/s/blog_87dc03ea0101dvus.html

http://www.it165.net/pro/html/201406/15300.html