简析短信收发，拦截问题

最新推荐文章于 2021-05-31 18:08:04 发布

小鬼头1111

最新推荐文章于 2021-05-31 18:08:04 发布

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分类专栏： android

本文链接：https://blog.youkuaiyun.com/oZuiJiaoWeiYang/article/details/51672542

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我就叨叨

看书的过程查了点资料，短信还有好多内容啊，先来个最基本的，后面补充吧。
短信接收流程：http://www.cnblogs.com/not-code/archive/2011/11/27/2265287.html
还是要看看啊，不然怎么得到的pdus?format?

权限

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

接收短信

监控短信的两种方法：http://www.blogjava.net/anymobile/articles/328396.html
当手机收到一条短信时，系统会发出一条值为 android.provider.Telephony.SMS_RECEIVED 的广播，这条广播里
携带着与短信相关的所有数据。每个应用程序都可以在广播接收器里对它进行监听，收到广
播时再从中解析出短信的内容即可。

class SMSBroadcastReceiver extends BroadcastReceiver {
        @Override
        public void onReceive(Context context, Intent intent) {
            if(intent.getAction().equals("android.provider.Telephony.SMS_RECEIVED")){
                abortBroadcast();
                Bundle bundle = intent.getExtras();
                //String format = intent.getStringExtra("format");
                Object msg[]  = (Object[]) bundle.get("pdus");

                SmsMessage smsMessage[] = new SmsMessage[msg.length];

                String fullMsg = "";
                for(int i = 0; i < msg.length; i++){
                    //smsMessage[i] = SmsMessage.createFromPdu((byte[]) msg[i], format);
                    smsMessage[i] = SmsMessage.createFromPdu((byte[]) msg[i]);

                    fullMsg = fullMsg + smsMessage[i].getMessageBody();

                }

从 Intent参数中取出了一个 Bundle 对象，然后使用 pdu密钥来提取一个 SMS pdus 数组，其中每一个 pdu 都表示一条短信消息。接着使用 SmsMessage 的createFromPdu()方法将每一个 pdu 字节数组转换为 SmsMessage 对象，调用这个对象的getOriginatingAddress()方法就可以获取到短信的发送方号码，调用 getMessageBody()方法就
可以获取到短信的内容，然后将每一个 SmsMessage 对象中的短信内容拼接起来，就组成了一条完整的短信。

注意：createFromPdu(byte[])已经过时了，从 API level 23 以后应该用createFromPdu(byte[], String)
参考：https://www.zhihu.com/question/37080814

第二个参数应该是短信的类型, 大概是GSM与CDMA短信的解码方式不同,所以应该传入这个参数,

Object[] messages = (Object[]) intent.getSerializableExtra("pdus");
String format = intent.getStringExtra("format");

拦截短信

4.4以后不管我设置优先级多高，都没拦截成功，abortBroadcast()也没起作用。
原因：4.4升级了对安全类软件的控制，无法再通过abort或者删除短信数据库的方式实现短信拦截；
具体参考：http://blog.youkuaiyun.com/l173864930/article/details/17112227
http://blog.youkuaiyun.com/l173864930/article/details/17019615

发送短信

sendBtn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                SmsManager smsManager = SmsManager.getDefault();
                Intent intent = new Intent("SENT_SMS_ACTION");
                PendingIntent pi = PendingIntent.getBroadcast(SMSActivity.this, 0, intent, 0);
                smsManager.sendTextMessage(toEdit.getText().toString().trim(), null, sendEdit.getText().toString(),
                        pi, null);
            }
        });


class SendStatusReceiver extends BroadcastReceiver{
        @Override
        public void onReceive(Context context, Intent intent) {
            if(getResultCode() == RESULT_OK){
                Toast.makeText(SMSActivity.this, "send success", Toast.LENGTH_LONG).show();
            }else{
                Toast.makeText(SMSActivity.this, "send fail", Toast.LENGTH_LONG).show();
            }
        }
    }

在 Send按钮的点击事件里面我们调用了 PendingIntent 的 getBroadcast()方法获取到了一个 PendingIntent 对象，并将它作为第四个参数传递到 sendTextMessage()方法中。然后又注册了一个新的广播接收器 SendStatusReceiver，这个广播接收器就是专门用于监听短信发送状态的，当 getResultCode()的值等于 RESULT_OK就会提示发送成功，否则提示发送失败。

完整代码

public class SMSActivity extends AppCompatActivity {
    private TextView senderText;
    private TextView contentText;
    private EditText toEdit;
    private EditText sendEdit;
    private Button sendBtn;

    private SMSBroadcastReceiver receiver;
    private SendStatusReceiver sendStatusReceiver;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_sms);

        initView();
        registerSMSReceiver();
        registerSendReceiver();
    }

    private void initView(){
        senderText = (TextView)findViewById(R.id.sender);
        contentText = (TextView)findViewById(R.id.content);
        toEdit = (EditText)findViewById(R.id.to);
        sendEdit = (EditText)findViewById(R.id.msg_input);

        sendBtn = (Button)findViewById(R.id.send);
        sendBtn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                SmsManager smsManager = SmsManager.getDefault();
                Intent intent = new Intent("SENT_SMS_ACTION");
                PendingIntent pi = PendingIntent.getBroadcast(SMSActivity.this, 0, intent, 0);
                smsManager.sendTextMessage(toEdit.getText().toString().trim(), null, sendEdit.getText().toString(),
                        pi, null);
            }
        });
    }

    private void registerSMSReceiver(){
        receiver = new SMSBroadcastReceiver();
        IntentFilter intentFilter = new IntentFilter("android.provider.Telephony.SMS_RECEIVED");
        intentFilter.setPriority(1000);
        registerReceiver(receiver, intentFilter);
    }

    private void registerSendReceiver(){
        sendStatusReceiver = new SendStatusReceiver();
        IntentFilter filter = new IntentFilter("SENT_SMS_ACTION");
        registerReceiver(sendStatusReceiver, filter);
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        unregisterReceiver(receiver);
        unregisterReceiver(sendStatusReceiver);
    }

    class SMSBroadcastReceiver extends BroadcastReceiver {
        @Override
        public void onReceive(Context context, Intent intent) {
            if(intent.getAction().equals("android.provider.Telephony.SMS_RECEIVED")){
                abortBroadcast();
                Bundle bundle = intent.getExtras();
                //String format = intent.getStringExtra("format");
                Object msg[]  = (Object[]) bundle.get("pdus");

                SmsMessage smsMessage[] = new SmsMessage[msg.length];

                String fullMsg = "";
                for(int i = 0; i < msg.length; i++){
                    //smsMessage[i] = SmsMessage.createFromPdu((byte[]) msg[i], format);
                    smsMessage[i] = SmsMessage.createFromPdu((byte[]) msg[i]);

                    fullMsg = fullMsg + smsMessage[i].getMessageBody();

                }

                String address = smsMessage[0].getOriginatingAddress();
                senderText.setText(address);
                contentText.setText(fullMsg);
            }
        }
    }

    class SendStatusReceiver extends BroadcastReceiver{
        @Override
        public void onReceive(Context context, Intent intent) {
            if(getResultCode() == RESULT_OK){
                Toast.makeText(SMSActivity.this, "send success", Toast.LENGTH_LONG).show();
            }else{
                Toast.makeText(SMSActivity.this, "send fail", Toast.LENGTH_LONG).show();
            }
        }
    }
}