Android广播接收器，用于扫描每个传入的SMS以查找特定的Contant

Question

我想扫描每条传入的短信以查找特定内容。找到特定内容后，将执行特定任务。假设特定内容字符串是"Hello world"，当服务找到此字符串时，它将触发特定任务，即使用前置摄像头拍照并将该照片放在特定文件夹中。当手机打开时，接收器必须始终运行。

Answer 1

为此

创建一个 SMS 广播接收器，该接收器在收到 SMS 时触发

public class SMSBroadcastReceiver extends BroadcastReceiver {
        private static final String SMS_RECEIVED = "android.provider.Telephony.SMS_RECEIVED";
        private static final String TAG = "SMSBroadcastReceiver";
        @Override
        public void onReceive(Context context, Intent intent) {
             Log.i(TAG, "Intent recieved: " + intent.getAction());
                if (intent.getAction() == SMS_RECEIVED) {
                    Bundle bundle = intent.getExtras();
                    if (bundle != null) {
                        Object[] pdus = (Object[])bundle.get("pdus");
                        final SmsMessage[] messages = new SmsMessage[pdus.length];
                        for (int i = 0; i < pdus.length; i++) {
                            messages[i] = SmsMessage.createFromPdu((byte[])pdus[i]);
                        }
                        if (messages.length > -1) {
                            Log.i(TAG, "Message recieved: " + messages[0].getMessageBody());
                        }
                    }
                }
           }
    }

在接收器内部，您可以检查收到的文本并执行特定操作。

在清单中也声明它，

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

同时声明权限，

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