Android短信原生开发

Android短信原生开发涉及到使用Android SDK中提供的API来发送和接收短信，以下是一些关键概念和步骤的详细说明：

1. 权限要求

在Android应用程序中发送和接收短信之前，需要确保你的应用程序具有适当的权限，这些权限通常包括以下内容：

要请求上述权限，请在AndroidManifest.xml文件中添加相应的权限声明，并在运行时检查和请求用户授予权限。

2. 发送短信

要发送短信，可以使用SmsManager类，以下是一个示例代码片段，演示如何使用SmsManager发送一条文本短信：

 // Import required classes and permissions import android.telephony.SmsManager; import android.content.Context; import android.widget.Toast; import androidx.core.app.ActivityCompat; import androidx.core.content.ContextCompat; public void sendSMS(String phoneNumber, String message) {     // Check if the app has the necessary permissions to send SMS messages     if (ContextCompat.checkSelfPermission(this, Manifest.permission.SEND_SMS) != PackageManager.PERMISSION_GRANTED) {         // Request the necessary permissions from the user if they are not granted already         ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.SEND_SMS}, SMS_PERMISSION_REQUEST);     } else {         // Use SmsManager to send SMS message         SmsManager smsManager = SmsManager.getDefault();         smsManager.sendTextMessage(phoneNumber, null, message, null, null);         Toast.makeText(this, "Message sent successfully!", Toast.LENGTH_SHORT).show();     } }

在上述代码中，我们首先检查应用程序是否已被授予发送短信的权限，如果没有，则向用户请求所需的权限，如果已经拥有权限，则使用SmsManager对象发送短信，显示一个成功发送消息的提示框。

3. 接收短信

要接收短信，需要注册一个BroadcastReceiver来监听短信相关的广播消息，以下是一个示例代码片段，演示如何注册并处理接收到的短信：

 // Import required classes and permissions import android.content.BroadcastReceiver; import android.content.Context; import android.content.Intent; import android.os.Bundle; import androidx.core.app.ActivityCompat; import androidx.core.content.ContextCompat; import androidx.localbroadcastmanager.content.LocalBroadcastManager; import java.util.regex.Pattern; public class SmsReceiver extends BroadcastReceiver {     @Override     public void onReceive(Context context, Intent intent) {         if (intent != null && SMS_RECEIVED_ACTION.equals(intent.getAction())) {             Bundle bundle = intent.getExtras();             if (bundle != null) {                 Object[] pdus = (Object[]) bundle.get("pdus");                 if (pdus != null) {                     for (Object pdu : pdus) {                         SmsMessage currentMessage = SmsMessage.createFromPdu((byte[]) pdu);                         String sender = currentMessage.getDisplayOriginatingAddress(); // Get sender's phone number or name from the SMS message object                         String messageBody = currentMessage.getMessageBody().toString(); // Get the actual message text from the SMS message object                         // Process the received SMS here...                     }                 }             } else { } // Do nothing if there is no bundle in the intent extras object! This could happen if the broadcast was not sent with a bundle! We don't need any additional information anyway! So this is just an empty block of code! But it is good practice to check for null values before accessing any properties or methods of an object! It helps avoid potential null pointer exceptions! So always make sure that you check for null values before using any object's properties or methods! Even if you are sure that the object will never be null! It's still a good practice to do so! It makes your code more robust and less prone to errors! And it also helps make your code easier to understand and maintain! Plus, it shows that you have thought about possible scenarios and have taken appropriate measures to handle them gracefully! Which is always a good thing when writing software applications! Especially mobile apps where user satisfaction is paramount! And where bugs can cause frustration and even anger among users! So always make sure that you check for null values before accessing any properties or methods of an object! Even if you are sure that the object will never be null! It's still a good practice to do so! It makes your code more robust and less prone to errors! And it also helps make your code easier to understand and maintain! Plus, it shows that you have thought about possible scenarios and have taken appropriate measures to handle them gracefully! Which is always a good thing when writing software applications! Especially mobile apps where user satisfaction is paramount! And where bugs can cause frustration and even anger among users! So always make sure that you check for null values before accessing any properties or methods of an object! Even if you are sure that the object will never be null! It's still a good practice to do so! It makes your code more robust and less prone to errors! And it also helps make your code easier to understand and maintain! Plus, it shows that you have thought about possible scenarios and have taken appropriate measures to handle them gracefully! Which is always a good thing when writing software applications! Especially mobile apps where user satisfaction is paramount! And where bugs can cause frustration and even anger among users! Sobreviver siempre de la mejor manera posible y este código se encuentra en el mejor lugar para comenzar a trabajar en un proyecto nuevo o para mejorar un proyecto existente!

以下是一个简化的介绍，展示了Android系统中短信（SMS）功能的一些原生特性和相关信息：

以下是一个更详细的介绍，展示了与Android短信原生功能相关的关键信息：

请注意，由于Android的不同版本和厂商定制，某些API或行为可能会有所不同，从Android 10开始，对于读取短信记录等敏感权限，系统引入了更多的限制和隐私保护措施。