应自动从消息中读取OTP (令牌

Question

我在一个安卓应用程序上工作，其中服务器发送一个动态口令，用户需要在应用程序中输入这个动态口令，我的应用程序的SignUp。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动态口令。我如何才能做到这一点？在这方面的任何帮助或指导都将受到高度赞赏。

Answer 1

我建议你不要使用任何第三方库从短信收件箱自动获取动态口令。如果你对广播接收器和它的工作原理有基本的了解，这是很容易做到的。只需尝试以下方法：

1. 创建单一界面，即SmsListner

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

1. 创建单一广播接收器，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;
    }
}

1. 在android清单文件

中添加侦听器，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"/>

1. 当收件箱中收到动态口令时，您将在其中自动获取动态口令的活动。在我的示例中，我正在获取动态口令并设置为edittext字段。

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();           
                            }
                        });
                }
            }
}

OtpVerificationActivity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>

OTP验证活动的屏幕截图，在该活动中，您可以在收到消息后立即获取OTP

​

Answer 2

您可以尝试使用简单的库like

通过gradle安装并添加权限后，使用类似onCreate activity的方法启动SmsVerifyCatcher：

    smsVerifyCatcher = new SmsVerifyCatcher(this, new OnSmsCatchListener<String>() {
    @Override
    public void onSmsCatch(String message) {
        String code = parseCode(message);//Parse verification code
        etCode.setText(code);//set code in edit text
        //then you can send verification code to server
    }
});

另外，覆盖活动生命周期方法：

  @Override
protected void onStart() {
    super.onStart();
    smsVerifyCatcher.onStart();
}

@Override
protected void onStop() {
    super.onStop();
    smsVerifyCatcher.onStop();
}

/**
 * need for Android 6 real time permissions
 */
@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
    super.onRequestPermissionsResult(requestCode, permissions, grantResults);
    smsVerifyCatcher.onRequestPermissionsResult(requestCode, permissions, grantResults);
}


public String parseCode(String message) {
    Pattern p = Pattern.compile("\\b\\d{4}\\b");
    Matcher m = p.matcher(message);
    String code = "";
    while (m.find()) {
        code = m.group(0);
    }
    return code;
}

Answer 3

因为谷歌已经限制了READ_SMS权限的使用，这里是没有READ_SMS权限的解决方案。

​

SMS Retriever API

​

基本功能是避免使用Android critical permission READ_SMS，使用该方法完成任务。吹气是你需要的步骤。

向用户号码发送动态口令后，检查短信检索器接口是否能收到消息或不是

SmsRetrieverClient client = SmsRetriever.getClient(SignupSetResetPasswordActivity.this);
Task<Void> task = client.startSmsRetriever();
task.addOnSuccessListener(new OnSuccessListener<Void>() {
    @Override
    public void onSuccess(Void aVoid) {
        // Android will provide message once receive. Start your broadcast receiver.
        IntentFilter filter = new IntentFilter();
        filter.addAction(SmsRetriever.SMS_RETRIEVED_ACTION);
        registerReceiver(new SmsReceiver(), filter);
    }
});
task.addOnFailureListener(new OnFailureListener() {
    @Override
    public void onFailure(@NonNull Exception e) {
        // Failed to start retriever, inspect Exception for more details
    }
});

广播接收器代码

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.Bundle;

import com.google.android.gms.auth.api.phone.SmsRetriever;
import com.google.android.gms.common.api.CommonStatusCodes;
import com.google.android.gms.common.api.Status;

public class SmsReceiver extends BroadcastReceiver {

    @Override
    public void onReceive(Context context, Intent intent) {
        if (SmsRetriever.SMS_RETRIEVED_ACTION.equals(intent.getAction())) {
            Bundle extras = intent.getExtras();
            Status status = (Status) extras.get(SmsRetriever.EXTRA_STATUS);

            switch (status.getStatusCode()) {
                case CommonStatusCodes.SUCCESS:
                    // Get SMS message contents
                    String otp;
                    String msgs = (String) extras.get(SmsRetriever.EXTRA_SMS_MESSAGE);

                    // Extract one-time code from the message and complete verification
                    break;
                case CommonStatusCodes.TIMEOUT:
                    // Waiting for SMS timed out (5 minutes)
                    // Handle the error ...
                    break;
            }
        }
    }
}

最后一步。将此接收器注册到您的清单

<receiver android:name=".service.SmsReceiver" android:exported="true">
    <intent-filter>
        <action android:name="com.google.android.gms.auth.api.phone.SMS_RETRIEVED"/>
    </intent-filter>
</receiver>

你的短信必须如下所示。

<#> Your OTP code is: 6789
QWsa8754qw2 

这里的QWsa8754qw2是你自己的应用程序的11个字符的哈希码。遵循此link

• 不得超过140字节
• 以前缀<#>
• 开头，以标识应用程序

的11个字符的哈希字符串结尾

要导入com.google.android.gms.auth.api.phone.SmsRetriever，请不要忘记在您的应用程序build.gradle中添加以下行：

implementation "com.google.android.gms:play-services-auth-api-phone:16.0.0"