获取Android短信草稿箱号码为空的解决办法
通过"content://sms"可以获取用于展现短信的几乎所有的信息，但是草稿箱的号码若通过"address"字段来获取的话，是空的。我目前找到了一种方法可以获取，不一定是最佳的方法。
参考了http://bbs.csdn.net/topics/350089080。不废话了，请将下面代码（manifest里面别忘了加“<uses-permission android:name="android.permission.READ_SMS" />”这句）植入MainActivity的onCreate()里面,然后运行之：
ContentResolver resolver = getContentResolver(); Cursor cursorForThreadId = resolver.query(Uri.parse("content://mms-sms/conversations?simple=true"), null, null, null, null); while (cursorForThreadId.moveToNext()) { long threadId = cursorForThreadId.getLong(cursorForThreadId.getColumnIndex("_id")); Log.e("", "thread_id = " + threadId); Cursor cursorSms = resolver.query(Uri.parse("content://sms"), null, "thread_id=" + threadId, null, null); while (cursorSms.moveToNext()) { String address = null; /** * Draft's "type" is 3. */ if (cursorSms.getInt(cursorSms.getColumnIndex("type")) == 3) { Cursor cursorCanonicalAddress = resolver.query( Uri.parse("content://mms-sms/canonical-address/" + threadId), null, null, null, null); if (cursorCanonicalAddress.moveToFirst()) { address = cursorCanonicalAddress.getString(cursorCanonicalAddress.getColumnIndex("address")); } cursorCanonicalAddress.close(); } else { address = cursorSms.getString(cursorSms.getColumnIndex("address")); } Log.e("", "address = " + address + " body = " + cursorSms.getString(cursorSms.getColumnIndex("body"))); } cursorSms.close(); Log.e("", "------------------------"); } cursorForThreadId.close();