Implementing SMS verification code function in Android development.

In Android development, the SMS verification code feature can be implemented by following these steps:

1. Add permission: Add the following permissions in the AndroidManifest.xml file.

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

1. Create a BroadcastReceiver: Create a class that extends BroadcastReceiver to receive SMS verification codes. Override the onReceive() method in the class, which will be triggered when a SMS is received.

public class SMSReceiver extends BroadcastReceiver{

    @Override
    public void onReceive(Context context, Intent intent) {
        Bundle bundle = intent.getExtras();
        if (bundle != null) {
            Object[] pdus = (Object[]) bundle.get("pdus");
            if (pdus != null) {
                for (Object pdu : pdus) {
                    SmsMessage smsMessage = SmsMessage.createFromPdu((byte[]) pdu);
                    String messageBody = smsMessage.getMessageBody();
                    // 在这里处理短信验证码
                    // 可以将短信验证码发送给UI界面显示，或者自动填充到相应的输入框中
                }
            }
        }
    }
}

1. Register a BroadcastReceiver: In the Activity where you need to receive the SMS verification code, register a BroadcastReceiver. You can register it in the onResume() method and unregister it in the onPause() method.

private SMSReceiver smsReceiver;

@Override
protected void onResume() {
    super.onResume();
    // 创建IntentFilter对象，并设置接收短信的action
    IntentFilter intentFilter = new IntentFilter();
    intentFilter.addAction("android.provider.Telephony.SMS_RECEIVED");
    // 创建BroadcastReceiver对象
    smsReceiver = new SMSReceiver();
    // 注册receiver
    registerReceiver(smsReceiver, intentFilter);
}

@Override
protected void onPause() {
    super.onPause();
    // 取消注册receiver
    unregisterReceiver(smsReceiver);
}

By following the steps above, you can implement SMS verification functionality in an Android application. When receiving a SMS, the BroadcastReceiver will trigger the onReceive() method, allowing you to handle the SMS verification. For example, you can display the verification code on the UI interface, or automatically fill it in the relevant input field.