How to send the SMS more than 160 character?

Junk characters? method sendMultipartTextMessage only send text message. If you want to send non text message, you should look to method sendDataMessage. Below is the code excerpt from android cts. It has example on how to send long messages.

SmsManager sm = SmsManager.getDefault();
ArrayList<String> parts =sm.divideMessage(LONG_TEXT);
int numParts = parts.size();

ArrayList<PendingIntent> sentIntents = new ArrayList<PendingIntent>();
ArrayList<PendingIntent> deliveryIntents = new ArrayList<PendingIntent>();

for (int i = 0; i < numParts; i++) {
sentIntents.add(PendingIntent.getBroadcast(getContext(), 0, mSendIntent, 0));
deliveryIntents.add(PendingIntent.getBroadcast(getContext(), 0, mDeliveryIntent, 0));
}

sm.sendMultiPartTextMessage(mDestAddr,null, parts, sentIntents, deliveryIntents)

Try below code might help

SmsManager sms = SmsManager.getDefault();
ArrayList<String> parts = sms.divideMessage(message);
sms.sendMultipartTextMessage(phoneNumber, null, parts, null, null);

The emulator send the junk characters in that code during certain problem so use apk in real mobile , and check the code , I am sure that your application will not send junk message..All the best.