Receiving MMS in android application

I need to develop an android app and one of its actions:

  • Detecting new MMS messages
  • Get the sender number to check if this is the number I want to get from him in my application.
  • Receiving (txt + image) from MMS
  • Displaying (Txt + Image) Data in ListView

well i found some code that could help me in 2nd and 3rd tasks but i tried this and tested it on my mobile and it works but it didn't get anything but black interface!

Perhaps the problem is that I did not understand some part of this code,

I wrote my comment above each statement that I could not understand it, please respond to my comments what is inside the code and help me understand what I am not seeing Hopefully the answers are early. and clear up.

   import java.io.BufferedReader;
   import java.io.IOException;
   import java.io.InputStream;
   import java.io.InputStreamReader;
   import java.text.MessageFormat;

   import android.app.Activity;
   import android.content.ContentResolver;
   import android.content.ContentValues;
   import android.content.Context;
   import android.database.Cursor;
   import android.graphics.Bitmap;
   import android.graphics.BitmapFactory;
   import android.net.Uri;
   import android.os.Bundle;
   import android.telephony.SmsMessage;
   import android.view.LayoutInflater;
   import android.view.View;
   import android.view.ViewGroup;
   import android.widget.ImageView;
   import android.widget.ListView;
   import android.widget.TextView;
     import android.app.Activity;
     import android.os.Bundle;

   public class MMSReceiverActivity extends Activity {

  private final Uri CONTENT_URI_PART = Uri.parse("content://mms/part");
   private static final String MSG_ID_STR = "mid=%1$s"; // I don't understand it

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);

    // Start Copying Code
    // I don't know how can I retrieve mms id
    long msg_id = this.getIntent().getLongExtra("msg_id", 0);
    // What different between ViewGroup and ListView
    ViewGroup listview = (ViewGroup) findViewById(R.id.mmsdetaillist);
    // What different between "content://mms/part" and "content://mms/"
    Cursor cursor = getContentResolver().query(CONTENT_URI_PART, null,
            String.format(MSG_ID_STR, msg_id), null, null);

    if (cursor.moveToFirst()) {
        do {
            // Why he puts partID
            String partId = cursor.getString(cursor.getColumnIndex("_id"));
            String type = cursor.getString(cursor.getColumnIndex("ct"));

            if ("text/plain".equals(type)) {
                String data = cursor.getString(cursor
                        .getColumnIndex("_data"));
                String body;
                // What the different between if it null or not all of
                // them will return (text)
                if (data != null) {
                    // implementation of this method below
                    body = getMmsText(partId);
                } else {
                    body = cursor.getString(cursor.getColumnIndex("text"));
                }

                // Why he declared it like this i mean why it didn't declare
                // like this findViewById (R.) etc
                TextView t = new TextView(this);
                t.setText(body);
                listview.addView(t);

                // Why here else ?? it should be only if because if MMS
                // contains Text + img : so it'll ignore the (else = img)
                // part !

            } else if ("image/jpeg".equals(type)
                    || "image/bmp".equals(type) || "image/gif".equals(type)
                    || "image/jpg".equals(type) || "image/png".equals(type)) {
                Bitmap bitmap = getMmsImage(partId);
                ImageView iv = new ImageView(this);
                iv.setImageBitmap(bitmap);
                listview.addView(iv);
            }
        } while (cursor.moveToNext());
    }
    cursor.close();

}

public String getMmsText(String id) {
    Uri partURI = Uri.parse("content://mms/part/" + id);
    InputStream is = null;
    StringBuilder sb = new StringBuilder();
    try {
        is = getContentResolver().openInputStream(partURI);
        if (is != null) {
            InputStreamReader isr = new InputStreamReader(is, "UTF-8");
            BufferedReader reader = new BufferedReader(isr);
            String temp = reader.readLine();
            while (temp != null) {
                sb.append(temp);
                temp = reader.readLine();
            }
        }
    } catch (IOException e) {
    } finally {
        if (is != null) {
            try {
                is.close();
            } catch (IOException e) {
            }
        }
    }
    return sb.toString();
}

public Bitmap getMmsImage(String _id) {
    Uri partURI = Uri.parse("content://mms/part/" + _id);
    InputStream is = null;
    Bitmap bitmap = null;
    try {
        is = getContentResolver().openInputStream(partURI);
        bitmap = BitmapFactory.decodeStream(is);
    } catch (IOException e) {
    } finally {
        if (is != null) {
            try {
                is.close();
            } catch (IOException e) {
            }
        }
    }
    return bitmap;
}
 }

      

Note: everyTime I search when sending or receiving MMS, I got this link but still I don't understand it

Should I be using repo and Git? and what is repo and git? why should i use MMS?

Should I use it when sending and receiving MMS? if yes for what? can i use this code

 content://mms-sms/conversations

      

instead of repo and git?

repo and git

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1 answer


Most of your questions have nothing to do with the MMS part of your assignment. Most of them are standard java and / or Android, which you need to understand before accepting such a task.

Also, SMS and MMS are not directly supported and are mostly undocumented, making them very difficult to work with.

I played around with sms and mms and found these links very helpful:

How to read MMS data on Android?

http://groups.google.com/group/android-developers/browse_thread/thread/d0c15ec17c12af0e?fwc=1&pli=1



And now that I am, I could answer some of the simpler questions you have:

"ViewGroup and ListView"

ViewGroup is the superclass for most views that can contain other views (LinearLayout, RelativeLayout ...), where the ListView is a "ViewGorup that creates a list of scrollable items".

"Why did he declare it like that, I mean why didn't he declare it findViewById (R.), etc."

findViewById is used when you have an xml layout file and want to reference a view in that layout. In this case, it creates the TextView at runtime (instead of defining it in the XML file) and adds it to the ListView.

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