自动获取短信验证码（详细注释）

效果图

步骤一：

自定义监听类

/** * Created by pengkv on 15/10/12. * 短信监听器，用于自动填充验证码 */
public class SMSContentObserver extends ContentObserver {
    public final String SMS_URI_INBOX = "content://sms/inbox";//收信箱
    private Activity activity = null;
    private String smsContent = "";//验证码
    private EditText verifyText = null;//验证码编辑框
    private String SMS_ADDRESS_PRNUMBER = "10690329013589";//短息发送提供商
    private String smsID = "";//短信观察者 收到一条短信时 onchange方法会执行两次，所以比较短信id，如果一致则不处理

    public SMSContentObserver(Activity activity, Handler handler, EditText verifyText) {
        super(handler);
        this.activity = activity;
        this.verifyText = verifyText;
    }

    @Override
    public void onChange(boolean selfChange) {
        super.onChange(selfChange);


        Cursor cursor = null;// 光标
        // 读取收件箱中指定号码的短信
        cursor = activity.getContentResolver().query(Uri.parse(SMS_URI_INBOX),
                new String[]{"_id", "address", "body", "read"}, //要读取的属性
                "address=? and read=?", //查询条件是什么
                new String[]{SMS_ADDRESS_PRNUMBER, "0"},//查询条件赋值
                "date desc");//排序
        if (cursor != null) {
            cursor.moveToFirst();
            if (cursor.moveToFirst()) {
                //比较和上次接收到短信的ID是否相等
                if (!smsID.equals(cursor.getString(cursor.getColumnIndex("_id")))) {

                    String smsbody = cursor.getString(cursor.getColumnIndex("body"));

                    //用正则表达式匹配验证码
                    Pattern pattern = Pattern.compile("[0-9]{6}");
                    Matcher matcher = pattern.matcher(smsbody);

                    if (matcher.find()) {//匹配到6位的验证码
                        smsContent = matcher.group();
                        if (verifyText != null && null != smsContent && !"".equals(smsContent)) {
                            verifyText.requestFocus();//获取焦点
                            verifyText.setText(smsContent);//设置文本
                            verifyText.setSelection(smsContent.length());//设置光标位置
                        }
                    }

                    smsID = cursor.getString(cursor.getColumnIndex("_id"));
                }

            }
        }


    }
}

步骤二：

在登录页面事件化监听类

//实例化短信监听器
SMSContentObserver mObserver = new SMSContentObserver(getActivity(), new Handler(), mEt_auth_code);
// 注册短信变化监听
mContext.getContentResolver().registerContentObserver(Uri.parse("content://sms/"), true, mObserver);

步骤三：

声明读取短信权限

<uses-permission android:name="android.permission.RECEIVE_SMS" />
<uses-permission android:name="android.permission.READ_SMS" />
<uses-permission android:name="android.permission.WRITE_SMS" />

步骤四：

为了防止内存泄漏，记得注销监听

@Override
public void onDestroy() {
    super.onDestroy();
    //注销短信监听 
    mContext.getContentResolver().unregisterContentObserver(mObserver);
}

小结：

去短信库获取短信比较不容易被拦截