com.tuenti.smsradar.SmsObserver Maven / Gradle / Ivy
/*
* Copyright (c) Tuenti Technologies S.L. All rights reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.tuenti.smsradar;
import android.content.ContentResolver;
import android.database.ContentObserver;
import android.database.Cursor;
import android.net.Uri;
import android.os.Handler;
/**
* ContentObserver created to handle the sms content provider changes. This entity will be called each time the
* system changes the sms content provider state.
*
* SmsObserver analyzes the change and studies if the protocol used is null or not to identify if the sms is incoming
* or outgoing.
*
* SmsObserver will analyze the sms inbox and sent content providers to get the sms information and will notify
* SmsListener.
*
* The content observer will be called each time the sms content provider be updated. This means that all
* the sms state changes will be notified. For example, when the sms state change from SENDING to SENT state.
*
* @author Pedro Vcente Gómez Sánchez
* @author Manuel Peinado
*/
class SmsObserver extends ContentObserver {
private static final Uri SMS_URI = Uri.parse("content://sms/");
private static final Uri SMS_SENT_URI = Uri.parse("content://sms/sent");
private static final Uri SMS_INBOX_URI = Uri.parse("content://sms/inbox");
private static final String PROTOCOL_COLUM_NAME = "protocol";
private static final String SMS_ORDER = "date DESC";
private ContentResolver contentResolver;
private SmsCursorParser smsCursorParser;
SmsObserver(ContentResolver contentResolver, Handler handler, SmsCursorParser smsCursorParser) {
super(handler);
this.contentResolver = contentResolver;
this.smsCursorParser = smsCursorParser;
}
@Override
public boolean deliverSelfNotifications() {
return true;
}
@Override
public void onChange(boolean selfChange) {
super.onChange(selfChange);
Cursor cursor = null;
try {
cursor = getSmsContentObserverCursor();
if (cursor != null && cursor.moveToFirst()) {
processSms(cursor);
}
} finally {
close(cursor);
}
}
private void processSms(Cursor cursor) {
Cursor smsCursor = null;
try {
String protocol = cursor.getString(cursor.getColumnIndex(PROTOCOL_COLUM_NAME));
smsCursor = getSmsCursor(protocol);
Sms sms = parseSms(smsCursor);
notifySmsListener(sms);
} finally {
close(smsCursor);
}
}
private void notifySmsListener(Sms sms) {
if (sms != null && SmsRadar.smsListener != null) {
if (SmsType.SENT == sms.getType()) {
SmsRadar.smsListener.onSmsSent(sms);
} else {
SmsRadar.smsListener.onSmsReceived(sms);
}
}
}
private Cursor getSmsCursor(String protocol) {
return getSmsDetailsCursor(protocol);
}
private Cursor getSmsDetailsCursor(String protocol) {
Cursor smsCursor;
if (isProtocolForOutgoingSms(protocol)) {
//SMS Sent
smsCursor = getSmsDetailsCursor(SmsContext.SMS_SENT.getUri());
} else {
//SMSReceived
smsCursor = getSmsDetailsCursor(SmsContext.SMS_RECEIVED.getUri());
}
return smsCursor;
}
private Cursor getSmsContentObserverCursor() {
String[] projection = null;
String selection = null;
String[] selectionArgs = null;
String sortOrder = null;
return contentResolver.query(SMS_URI, projection, selection, selectionArgs, sortOrder);
}
private boolean isProtocolForOutgoingSms(String protocol) {
return protocol == null;
}
private Cursor getSmsDetailsCursor(Uri smsUri) {
return smsUri != null ? this.contentResolver.query(smsUri, null, null, null, SMS_ORDER) : null;
}
private Sms parseSms(Cursor cursor) {
return smsCursorParser.parse(cursor);
}
private void close(Cursor cursor) {
if (cursor != null) {
cursor.close();
}
}
/**
* Represents the SMS origin.
*/
private enum SmsContext {
SMS_SENT {
@Override
Uri getUri() {
return SMS_SENT_URI;
}
}, SMS_RECEIVED {
@Override
Uri getUri() {
return SMS_INBOX_URI;
}
};
abstract Uri getUri();
}
}