我要开发一个
Android应用程序,它的一个活动是:
>检测新的MMS消息
>获取发件人编号,以检查我是否希望在我的申请中收到该编号
>从MMS获取(txt图像)
>在ListView中显示(Txt图像)数据
好吧,我找到了一个可能帮助我完成第二和第三项任务的代码
但我试过它,并在我的手机上测试它,它是工作但它没有检索任何只是黑色的界面!
也许是我不理解这部分代码的问题,
我在每个声明上面写了我的评论我无法理解它请在代码中回答我的评论并帮助我理解我所缺少的
希望尽早得到你的答复.请清楚.
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;
}
}
注意:everyTime我搜索发送或接收彩信我得到了这个链接,但直到现在我还没有得到它
我应该使用repo和Git吗?
什么是回购和Git?
我为什么要在彩信中使用?
我应该在发送和接收彩信时使用它吗?如果是的话为什么?
我可以使用此代码吗?
content://mms-sms/conversations
而不是回购和git?
最佳答案 您的大部分问题与作业的MMS部分无关.大多数是标准的java和/或Android,您需要在执行此类任务之前了解它.
除此之外,短信和彩信不是直接支持的,而且大部分都是无人值守的,因此很难使用.
我一直在玩sms和mms,发现这些链接非常有用:
How to Read MMS Data in Android?
http://groups.google.com/group/android-developers/browse_thread/thread/d0c15ec17c12af0e?fwc=1&pli=1
而现在,我就是这样,我不妨回答一些比较简单的问题:
“ViewGroup和ListView”
ViewGroup是大多数视图的超类,可以包含其他视图(LinearLayout,RelativeLayout …),其中ListView是“创建可滚动项列表的ViewGorup”.
“为什么他这样声明我的意思是为什么它没有声明像这个findViewById(R.)等”
如果您有xml布局文件,并且想要引用该布局中的View,则使用findViewById.在这种情况下,他在运行时创建一个TextView(而不是在xml文件中定义它)并将其添加到ListView.