Bài 13: How to work with broadcast receivers

Giải thích một số vấn đề về BroadcastReceiver:
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I. Xây dựng ứng dụng nhận tin nhắn SMS gởi đến.
1. Tệp tin AndroidManifest.xml:
    Thêm dòng:

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

<application   
    <activity        ....
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />
            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>
    <receiver android:name="broad.hkh.com.broadcastreciversms.IncomingSms">
        <intent-filter>
            <action android:name="android.provider.Telephony.SMS_RECEIVED"/>
        </intent-filter>
    </receiver>
</application> 

2. Mã nguồn IncomingSms.java:

package broad.hkh.com.broadcastreciversms; import android.content.BroadcastReceiver; import android.content.Context; import android.content.Intent; import android.os.Bundle; import android.telephony.SmsManager; import android.telephony.SmsMessage; import android.util.Log; import android.widget.Toast; /**  * Created by hieu.truongvan on 20/1/2016.  */ public class IncomingSms extends BroadcastReceiver {     SmsManager sms = SmsManager.getDefault();     @Override     public void onReceive(Context context, Intent intent) {         Bundle bundle = intent.getExtras();         String smsReceiver = "";         try {             if (bundle != null) {              Object[] pdusObj = (Object[]) bundle.get("pdus");                 for(int i = 0; i < pdusObj.length; i++) {                     SmsMessage smsMessage = SmsMessage.createFromPdu((byte[])pdusObj[i]);                     String senderNumber = smsMessage.getDisplayOriginatingAddress();                     String smsBody = smsMessage.getDisplayMessageBody();                     Log.i("SMS Receiver", "sender:" +senderNumber + ", content:" + smsBody);                     smsReceiver += senderNumber + smsBody;                 }                 Toast.makeText(context,"Tin nhắn:" + smsReceiver, Toast.LENGTH_LONG).show();             }         } catch (Exception e) {             Log.i("Error SmsReceiver", "Error " + e);         }     } }

Kết quả demo:

Download mã nguồn dự án:
https://drive.google.com/file/d/0B8tAQ0_sJKCSQkdIOF95WW9lSFE/view?usp=sharing

II. Xây dựng ứng dụng đọc tất cả nội dung tin nhắn trong điện thoại (có thể dùng xử lý tin nhắn bầu chọn):


Link download ví dụ này:
https://drive.google.com/file/d/0B8tAQ0_sJKCSbExxZWs2NVg2Zmc/view?usp=sharing