OTP（令牌）应自动从消息中读取

我正在开发一个 Android 应用程序，其中服务器发送 OTP，用户需要在应用程序中输入此 OTP，才能注册我的应用程序。我想要的是，我的应用程序应该能够自动读取服务器发送的 OTP。我怎样才能实现这个目标？在这方面的任何帮助或指导将不胜感激。

我建议您不要使用任何第三方库从 SMS 收件箱自动获取 OTP。 如果您对广播接收器及其工作原理有基本的了解，那么这可以轻松完成。 只需尝试以下方法：

1. 创建单一接口，即 SmsListner

package com.wnrcorp.reba;
public interface SmsListener {
    public void messageReceived(String messageText);
}

2. 创建单个广播接收器，即 SmsReceiver

package com.wnrcorp.reba;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.telephony.SmsMessage;

public class SmsReceiver extends BroadcastReceiver {
    private static SmsListener mListener;
    Boolean b;
    String abcd, xyz;
    @Override
    public void onReceive(Context context, Intent intent) {
        Bundle data = intent.getExtras();
        Object[] pdus = (Object[]) data.get("pdus");
        for (int i = 0; i < pdus.length; i++) {
            SmsMessage smsMessage = SmsMessage.createFromPdu((byte[]) pdus[i]);
            String sender = smsMessage.getDisplayOriginatingAddress();
            // b=sender.endsWith("WNRCRP");  //Just to fetch otp sent from WNRCRP
            String messageBody = smsMessage.getMessageBody();
            abcd = messageBody.replaceAll("[^0-9]", ""); // here abcd contains otp 
            which is in number format
            //Pass on the text to our listener.
            if (b == true) {
                mListener.messageReceived(abcd); // attach value to interface 
                object
            } else {}
        }
    }
    public static void bindListener(SmsListener listener) {
        mListener = listener;
    }
}

3. 在 android 清单文件中添加监听器，即广播接收器

<receiver android:name=".SmsReceiver">
    <intent-filter>
        <action android:name="android.provider.Telephony.SMS_RECEIVED"/>
    </intent-filter>
</receiver>

并添加权限

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

4. 当收件箱中收到 otp 时，您将自动获取 otp 的活动。就我而言，我正在获取 otp 并在 edittext 字段上进行设置。

public class OtpVerificationActivity extends AppCompatActivity {
    EditText ed;
    TextView tv;
    String otp_generated, contactNo, id1;
    GlobalData gd = new GlobalData();
    @Override
    protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_otp_verification);
            ed = (EditText) findViewById(R.id.otp);
            tv = (TextView) findViewById(R.id.verify_otp);
            /*This is important because this will be called every time you receive 
             any sms */
            SmsReceiver.bindListener(new SmsListener() {
                @Override
                public void messageReceived(String messageText) {
                    ed.setText(messageText);
                }
            });
            tv.setOnClickListener(new View.OnClickListener() {
                    @Override
                    public void onClick(View v) {
                        try {
                            InputMethodManager imm =
                                (InputMethodManager) getSystemService(INPUT_METHOD_SERVICE);
                            imm.hideSoftInputFromWindow(getCurrentFocus().getWindowToken(), 0);
                        } catch (Exception e) {}
                        if (ed.getText().toString().equals(otp_generated)) {
                            Toast.makeText(OtpVerificationActivity.this, "OTP Verified 
                                Successfully!", Toast.LENGTH_SHORT).show();           
                            }
                        });
                }
            }
}

OTP 验证活动的布局文件

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/activity_otp_verification"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="com.wnrcorp.reba.OtpVerificationActivity">
    <android.support.v7.widget.CardView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/firstcard"
        xmlns:card_view="http://schemas.android.com/apk/res-auto"
        card_view:cardCornerRadius="10dp"
        >
        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="vertical"
            android:background="@android:color/white">
            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="OTP Confirmation"
                android:textSize="18sp"
                android:textStyle="bold"
                android:id="@+id/dialogTitle"
                android:layout_margin="5dp"
                android:layout_gravity="center"
                />
            <EditText
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:id="@+id/otp"
                android:layout_margin="5dp"
                android:hint="OTP Here"
                />
            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="Verify"
                android:textSize="18sp"
                android:id="@+id/verify_otp"
                android:gravity="center"
                android:padding="10dp"
                android:layout_gravity="center"
                android:visibility="visible"
                android:layout_margin="5dp"
                android:background="@color/colorPrimary"
                android:textColor="#ffffff"
                />
        </LinearLayout>
    </android.support.v7.widget.CardView>
</RelativeLayout>

Screenshots for OTP Verification Activity where you fetch OTP as soons as messages received