问题
I've to develop an android application and one of its activity is:
- Detecting New MMS messages
- Get Sender number to check if it is the number i want to receive from it in my application
- Getting (txt + image) from MMS
- Showing (Txt + Image) data in ListView
well, I found a code that might help me in the 2nd and 3rd tasks but i tried it and test it on my mobile and it is work but it did not retrieve anything just black interface!!!
Maybe the problem that i didn't understand some part of this code,
I wrote my comment above each statement that I couldn't understand it please answer my comments that inside the code and help me to understand what i am missing hope to get ur responses early. and please be clear.
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's different between ViewGroup and ListView
ViewGroup listview = (ViewGroup) findViewById(R.id.mmsdetaillist);
// What's 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's the different between if it's 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 on sending or receiving MMS i got this link , But until now i do not get it
Should i use repo and Git? and what is repo and Git? why should i use in MMS?
should i use it when send and receive MMS? if yes for why? can i use this code
content://mms-sms/conversations
instead of repo and git?
repo and Git
回答1:
Most of your questions have nothing to do with the MMS part of your assignment. Most of it is standard java and/or Android, that you need to understand before taking on such a task.
Besides that, SMS and MMS are not directly supported and is mostly undocumentet, so it is very hard to work with.
I have been playing around with sms and mms and found these links very useful:
How to Read MMS Data in Android?
http://groups.google.com/group/android-developers/browse_thread/thread/d0c15ec17c12af0e?fwc=1&pli=1
And now that i'm at it, i might as well answer some of the more simple questions you have:
"ViewGroup and ListView"
A ViewGroup is a superclass for most views that can contain other views (LinearLayout, RelativeLayout ...), where a ListView is "a ViewGorup that creates a list of scrollable items."
"Why he declared it like this i mean why it didn't declare like this 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 he creates a TextView at runtime (Instead of defining it in an xml file) and adds it to the ListView.
来源：https://stackoverflow.com/questions/10087972/receiving-mms-in-android-application