From android version 2.3 SIP API is added in Android. you can use either inbuilt SipStack library or third party open source sip stacks.

Refer [Android Developer&#39;s Guide](http://developer.android.com/guide/topics/connectivity/sip.html)

There are different open source sip stack libraries as well as projects are available on internet. You can download the source code of that projects.

Here is the List of some popular open source sip stack libraries which allows to voice call over internet.

1.[Pjsip][1]&lt;br&gt;
2.[Mjsip][2]&lt;br&gt;
3.[doubango][3]&lt;br&gt;
4.[belle-sip][4] 

There are different open source projects which have used these libraries in their projects.like [Sipdroid][5] uses **MjSip**, [Csipsimple][6] uses **PjSip**, [imsdroid][7] uses **doubango** and [Linphone][8] uses **belle-sip**.

You may also like to refer this https://stackoverflow.com/questions/9787556/android-sip-stack-what-to-use


  [1]: http://www.pjsip.org/
  [2]: http://mjsip.org/mjua.html
  [3]: http://www.doubango.org/
  [4]: https://github.com/BelledonneCommunications/belle-sip
  [5]: http://sipdroid.org/
  [6]: http://code.google.com/p/csipsimple/
  [7]: http://code.google.com/p/imsdroid/
  [8]: https://github.com/BelledonneCommunications/linphone-android

Open source SIP stacks :

1. Android SDK&#39;s default implementation (API &gt; 9) :  
Advantages : Documentation available. Easy to understand.  
Disadvantages : not all devices are supported. Can&#39;t change codecs.

2. Third Party

Java :

- JainSIP (license : Public Domain)

Advantages : Oracle (Sun) project ==&gt; Active development. Looks easier than MjSIP (more documentation).   
Disadvantages : Not used in a &quot;famous&quot; app.

- MjSIP (license : GNU GPL)

Advantages : SipDroid is built on it. (source code available) (red5phone is another project)
Disadvantages : Not fully compliant with RFC?. Lack of tutorials (Javadocs available though). SOPHISTICATED. Development almost dead.

- Doubango framework [android-ngn-stack] (license : GNU GPLv3)

Advantages : IMSDroid is built on it. (source code available)  
Disadvantages : Generated apk file size tend to be &quot;heavy&quot; (&gt;15MB as mentioned [here][1])

C/C++ :

- Native SIP Stacks  

Advantages : Various choice (PjSip [CSipSimple], GNU oSIP/eXoSIP [Linphone, which has made their own stack belle-sip]). Full compliance with RFC?. Better performance.  
Disadvantages : Android NDK/JNI for a beginner. 

Sources (old and mainly C/C++):

http://www.cs.columbia.edu/sip/implementations.html  
http://www.pernau.at/kd/voip/bookmarks-sip-stacks.html


  [1]: https://stackoverflow.com/questions/10042534/android-sip-client?lq=1

If you need VoIP but not SIP, check out WebRTC http://www.webrtc.org/

I have a table in a local SQL server database. I want to recreate this table in a hosted database.

What I want to do is to have a script that when run against the hosted database, this table is recreated with all the data, etc.

How do I create this script using SQL Server Management Studio? Thanks.



How to generate scripts to recreate table using SQL Server Management Studio [Schema and data]?

In python there is a `pass` keyword for defining an empty function, condition, loop, ...
Is there something similar for Ruby?

Python Example:

    def some_function():
        # do nothing
        pass

Equivalent of “pass” in Ruby

I need to integrate VoIP service in my Android application.&lt;br&gt;
Is there any free (best open source) library ?

I need that the library at least allows voice call over internet and not necessarily internet to phone (like 2 Skype account).

VoIP library for Android

I need to integrate VoIP service in my Android application. 
Is there any free (best open source) library ?
I need that the library at least allows voice call over internet and not necessarily internet to phone (like 2 Skype account).

I see a list of optional items to install in the packages window, and can&#39;t find any reference to what the **Google Web Driver** and what it actually does?

What is Google Web Driver in the Android SDK Manager?

I am writing some sample apps.  
After I debug these apps, I don&#39;t see an uninstall button in my device&#39;s application management.  
When I do adb uninstall, it always says `Failure without any reason.`  
In DDMS I saw that my apk is stored in `/data/app/com.k2g.leaveDemo-1.apk`.  
I am not sure what am I missing.  
I always have to reset my device to get rid of these apps :(

Do I need to do sign something?  
Do I need to do something in debug mode?  
Or does it depend on the version?

I am using Samsung S2.


adb uninstall failed

Just recently I have had a problem with a key store. I know there are plenty of questions about this problem already. I have read them all and Googled furiously.

#Error:


    keytool error: java.io.IOException: Keystore was tampered with, or password was incorrect
    java.io.IOException: Keystore was tampered with, or password was incorrect
    	at sun.security.provider.JavaKeyStore.engineLoad(JavaKeyStore.java:772)
    	at sun.security.provider.JavaKeyStore$JKS.engineLoad(JavaKeyStore.java:55)
    	at java.security.KeyStore.load(KeyStore.java:1214)
    	at sun.security.tools.KeyTool.doCommands(KeyTool.java:885)
    	at sun.security.tools.KeyTool.run(KeyTool.java:340)
    	at sun.security.tools.KeyTool.main(KeyTool.java:333)
    Caused by: java.security.UnrecoverableKeyException: Password verification failed
    	at sun.security.provider.JavaKeyStore.engineLoad(JavaKeyStore.java:770)
    	... 5 more


#Software I am using:


###Java

    java version &quot;1.7.0_21&quot;
    Java(TM) SE Runtime Environment (build 1.7.0_21-b11)
    Java HotSpot(TM) 64-Bit Server VM (build 23.21-b01, mixed mode)

###Eclipse

	Version: 3.8.0
	Build id: I20120502-2000

###Latest ADT Plugin

###Latest Android SDK

#Here is what I know:

- I did not lose the password and it has never changed.
- I cannot retrieve the password(I know the pass).
- I cannot sign an existing application with a different key without releasing a brand new application(So I cannot publish any updates).

#Here is what I have done:

- I have uninstalled and re-installed Eclipse many times.
- I have uninstalled and re-installed the android ADT plugin.
- I have removed and re-downloaded lastest Android SDK many times.
- I have uninstalled and re-installed JDK7.
- I have tried using the backups of my keystore.
- I have checked the MD5 checksums using &quot;md5sum KEYSTORE&quot; and compared with the backups(same MD5 output - not tampered).
- I have tried brute-forcing the key store(I have retrieved the password that I knew).
- I created a test key(with current setup) and tested the password and it seems to worked fine(so something has changed).
- I have tried exporting the android .apk manually and then tried to sign it(Outside of Eclipse).


#Here is how I export a signed application:

- **Through Eclipse:** Exporting of using File &gt; Export &gt; Export Android Application.
- **Before JDK7:** jarsigner -verbose -keystore KEYSTORE FILE ALIAS.
- **With JDK7:** jarsigner -verbose -sigalg MD5withRSA -digestalg SHA1 -keystore KEYSTORE FILE ALIAS.

#What is there left to figure out or try?

- &lt;strike&gt;Some of the references/URLs say to remove the &quot;trusted.certs&quot; file?&lt;/strike&gt;
- &lt;strike&gt;Try deleting the &quot;debug.keystore&quot;?&lt;/strike&gt;
- &lt;strike&gt;Would updating Eclipse or any of the Android development tools affect my keystore?&lt;/strike&gt;
- &lt;strike&gt;Would updating Java from jdk6 to jdk7 create any problems?&lt;/strike&gt;
- &lt;strike&gt;Could this have messed with or change how the jarsigner works in anyway?&lt;/strike&gt;

#User suggestions:

- Try using JDK6, but I was able to recently export an application.
- &lt;strike&gt;Checked key.store.password or key.alias.password in my local.properties&lt;/strike&gt; 
- &lt;strike&gt;Unchecking the build automatically in eclipse and clean your project&lt;/strike&gt;
- &lt;strike&gt;Try to remove .metadata folder in your workspace and clear all temp folders.&lt;/strike&gt; 

#Summary

- Keystores did not change,
- I have the passwords to the keystores,
- I have successfully exported an application recently using:
	- Eclipse 3.8 (and Eclipse 4.0+),
	- Latest Java 7,
	- Latest ADT Plugin.
- My last successful export and build was a few weeks ago using Eclipse 3.8, latest Android tools and Java 7 with the same password.

#Update (6/29/14)
- I have used: *keytool -list -keystore KEYSTORE* to successfully prove and show that 3 out of my 4 keys work.
- I bruteforced the last key and obtained the password from the keystore(The pass I already knew), but the password does not work when I enter for signing. I have used: *java -jar* AndroidKeystoreBrute_v1.02.jar *-m 3 -k KEYSTORE -d WORDLIST*.
- Strangely enough, sometimes when I type my password into eclipse very quickly, my alias will show up and I can successfully export my application. (I know this is crazy).
- Updated Java version.

If I type in the password very quickly it works, sometimes.

It seems that opening up Eclipse and entering the password the first time lets me use the keystore.

Obviously, if all else fails, I will have to create a new key store. I really would like to get this resolved, I am just not sure what to do now besides republish with a new key.

If the key cannot be recovered properly, I might open source it on Github.


---

#Solution (6/29/14):

A special thanks to user Erhannis!

Here is what I did:

The command would error out on me each time: 

    keytool -importkeystore -srckeystore old.keystore -destkeystore new.keystore -v

Since you told me we could extract private keys from the Java Keystore(.jks), I dug deeper and ended up using a variation of the command. I followed the links you posted [here](https://security.stackexchange.com/a/3795) and [here](http://www.tbs-certificates.co.uk/FAQ/en/626.html):

    keytool -importkeystore -srckeystore old.keystore -destkeystore new.keystore -deststoretype pkcs12

After extracting the private key and storing as PKCS12, I think extracted my private key and put it back into a brand new Java Keystore:

    keytool -importkeystore -srckeystore new.keystore -srcstoretype pkcs12 -destkeystore final.keystore -deststoretype jks

---

##References:

http://developer.android.com/tools/publishing/app-signing.html#signapp

http://code.google.com/p/android-keystore-password-recover/


##List of StackOverflow URLs I have read:

https://stackoverflow.com/questions/6089813/please-advice-needed-lost-keystore-password

https://stackoverflow.com/questions/6035970/invalid-keystore-problem

https://stackoverflow.com/questions/4459719/android-i-lost-my-android-key-store-what-should-i-do

https://stackoverflow.com/questions/4322367/i-lost-my-keystore-file

https://stackoverflow.com/questions/6149530/forgot-keystore-password-thinking-of-brute-force-detection-will-it-corrupt-the

https://stackoverflow.com/questions/8877354/i-have-lost-the-password-for-android-keystore-file

https://stackoverflow.com/questions/4280507/problem-running-my-signed-release-keystore-in-eclipse

https://stackoverflow.com/questions/8894987/android-forgot-keystore-password-can-i-decrypt-keystore-file

https://stackoverflow.com/questions/9309975/android-release-keystore-issue-keystore-was-tampered-with-or-password-was-inc

Android keystore stopped working

I have developed one android project. In this project the text font defaults to android:sans.

Now I want to replace the default text font to roboto font for my entire project.

How can I do this?

How to use Roboto font in android Project

Is there any way in Android to draw a filled rectangle with say a black border. My problem is that the canvas.draw() takes one paint object, and to my knowledge the paint object can&#39;t have a different color for the fill and the stroke. Is there a way around this?

Drawing a filled rectangle with a border in android

Since I first saw a `dist/` directory in many open source projects, usually on GitHub, I&#39;ve been wondering what it means.

With `dist`, `vendor`, `lib`, `src`, and many other folder names that we see quite often, I sometimes wonder how I should name my own folders.

Correct me if I&#39;m wrong!

* src: Contains the **sources**. Sometimes only the pure sources, sometimes with the minified version, depends on the project.
* vendor: Contains other dependencies, like other open source projects.
* lib: Good question, it&#39;s really close to `vendor` actually, depending on the project we can see one or another or both...
* dist: From what I saw, it contains the &quot;production&quot; files, the one we should use if we want to use the *library*.

Why is open source so confusing? Isn&#39;t it possible to do things clearer? At least per language because some languages use specific names.

What is the meaning of the /dist directory in open source projects?

... or the shoemaker&#39;s children go barefoot?

I would like to fix some styling &amp; have an idea for the feature (and a lot of free time) but I cannot find any github.com page on github.com.

Is Github.com source code open source?

I am new to using React for development.

Can someone list the advantages and disadvantages in using ReactJS.
Are there any performance issues with using this library for large projects.

Advantages and Disadvantages of using ReactJS

We implemented `Sinch` in an `angular 2` web application.

Everything works fine, except when I try to call a user using the `sinch` phone demo.

When the app is running in the foreground it will ring and the connection is made.

When the app is running in the background nothing happens.

In an angular application the `onCallProgressing` eventlistener is not getting triggered, the page just waits until it spits out this error message:

[![enter image description here][1]][1]&lt;br&gt;&lt;br&gt;

It seems like the problem lies in the missing `jquery` functions since I rewrote the project to angular.

I like to know what I can do to fix this issue with the sinch API.

Full stack trace of the error is as follows:

    Error: Error executing listener: onCallEnded
    at SinchError (http://cdn.sinch.com/latest/sinch.min.js:4:4093) [&lt;root&gt;]
    at g.&lt;anonymous&gt; (http://cdn.sinch.com/latest/sinch.min.js:4:18715) [&lt;root&gt;]
    at Array.forEach (native) [&lt;root&gt;]
    at g.execListener (http://cdn.sinch.com/latest/sinch.min.js:4:18650) [&lt;root&gt;]
    at g.mxpHangup (http://cdn.sinch.com/latest/sinch.min.js:4:30318) [&lt;root&gt;]
    at g.hangup (http://cdn.sinch.com/latest/sinch.min.js:5:12013) [&lt;root&gt;]
    at g.&lt;anonymous&gt; (http://cdn.sinch.com/latest/sinch.min.js:5:4195) [&lt;root&gt;]
    at Zone.runTask (http://localhost:4200/polyfills.bundle.js:6135:47) [&lt;root&gt; =&gt; &lt;root&gt;]
    at ZoneTask.invoke (http://localhost:4200/polyfills.bundle.js:6329:33) [&lt;root&gt;]
    at data.args.(anonymous function) (http://localhost:4200/polyfills.bundle.js:7360:25) [&lt;root&gt;]

This is the angular component that manages the calling using *sinch*:

    import {Component, AfterViewInit, ViewChild, OnInit, OnDestroy} from &#39;@angular/core&#39;;
    import {Router, ActivatedRoute} from &quot;@angular/router&quot;;
    import {HttpService} from &quot;../http.service&quot;;
    import &#39;rxjs/add/operator/map&#39;;
    import {Response} from &quot;@angular/http&quot;;
    import {Employee} from &quot;../employee&quot;;
    import {Subscription} from &quot;rxjs/Rx&quot;;
    import {TimeOutService} from &quot;../../time-out.service&quot;;
    
    declare var SinchClient: any;
    
    @Component({
      selector: &#39;mp-callpage&#39;,
      templateUrl: &#39;./callpage.component.html&#39;,
      styleUrls: [&#39;./callpage.component.scss&#39;]
    })
    export class CallpageComponent implements OnInit, OnDestroy {
      public contact: Employee;
      public _video;
      public _audio;
      public volume: number = 0.2;
      public vol: number = 20;
      public volumechange: boolean = false;
      private volumefade = [];
      id: number;
      private sub: Subscription;
    
      sinchClient: any;
      public callUserName = &quot;&quot;;
      public incomingVideoSource = &quot;&quot;;
      private callClient;
      private call;
    
      constructor(private router: Router, private route: ActivatedRoute, private http: HttpService, private timeOutService: TimeOutService) {
      }
    
      ngOnInit() {
    
        this.sub = this.route.params.subscribe(params =&gt; {
          this.id = +params[&#39;id&#39;];
          if (this.id != 0) {
            //noinspection TypeScriptValidateTypes
            this.http.getData(&#39;employees&#39;, &#39;orderBy=&quot;id&quot;&amp;equalTo=&#39; + this.id)
              .map((response:Response) =&gt; response.json())
              .subscribe(
                (data:Employee) =&gt; {
                  for (var property in data) {
                    if (data.hasOwnProperty(property)) {
                      this.contact = data[property];
                    }
                  }
                }
              );
          } else {
            this.contact = new Employee({
              name: &quot;the reception&quot;,
              id: 0
            }, &quot;the receptionist&quot;, &quot;the receptionist&quot;, 0, false, &quot;0000&quot;)
          }
        });
    
    
        var _self = this;
    
        this.sinchClient = new SinchClient({
          applicationKey: &#39;xxx&#39;,
          capabilities: {calling: true, video: true}
        });
    
        /*** Name of session, can be anything. ***/
        var sessionName = &#39;sinchSessionVIDEO-&#39; + this.sinchClient.applicationKey;
    
    
        /*** Check for valid session. NOTE: Deactivated by default to allow multiple browser-tabs with different users. ***/
        var sessionObj = JSON.parse(localStorage[sessionName] || &#39;{}&#39;);
        console.log(sessionObj);
        if(sessionObj.userId) {
          this.sinchClient.start(sessionObj)
            .then(function() {
              localStorage[sessionName] = JSON.stringify(_self.sinchClient.getSession());
              console.log(&quot;a valid session was found&quot;)
            }).fail(function(response) {
            console.log(response);
          });
        }else {
          console.log(&quot;no user id&quot;);
        }
    
    
        /*** Set up callClient and define how to handle incoming calls ***/
        this.callClient = this.sinchClient.getCallClient();
        this.callClient.initStream().then(function() { // Directly init streams, in order to force user to accept use of media sources at a time we choose
          // $(&#39;div.frame&#39;).not(&#39;#chromeFileWarning&#39;).show();
        });
    
      }
    
      /*** Define listener for managing calls ***/
      private callListeners = {
        onCallProgressing: (call) =&gt; {
          this._audio.play();
        },
        onCallEstablished: (call) =&gt; {
          this._video.src = call.incomingStreamURL;
          this._audio.pause();
          this._audio.currentTime=0;
        },
        onCallEnded: (call) =&gt; {
          this._video.src = &#39;&#39;;
          this.onCallEnd(&#39;/&#39;);
          if(call.error) {
            console.log(&quot;there was an error&quot; + call.error.message);
          }
        }
      };
    
      /*** Make a new data call ***/
      onCall() {
        this.call = this.callClient.callUser(this.callUserName);
    
        this.timeOutService.inCall = true;
        this.timeOutService.interacted();
    
        this.call.addEventListener(this.callListeners);
      }
    
      @ViewChild(&#39;video&#39;) video:any;
      @ViewChild(&#39;ringback&#39;) audio:any;
    
      ngAfterViewInit () {
        this._audio = this.audio.nativeElement;
        this._video = this.video.nativeElement;
        if(navigator.mediaDevices &amp;&amp; navigator.mediaDevices.getUserMedia) {
          navigator.mediaDevices.getUserMedia({ video: true, audio: true })
            .then(stream =&gt; {
              this._video.src = &#39;&#39;;
              this._video.play();
              this._video.volume = 0.2;
            })
        }
    
      }
      onVolumeChange(direction: string) {
        for (var i = 0; i &lt; this.volumefade.length; i++) {
          clearTimeout(this.volumefade[i]);
        }
        this.volumefade = [];
        this.volumechange = true;
        if (direction == &#39;down&#39; &amp;&amp; this._video.volume &gt; 0.15) {
          this._video.volume -= 0.1;
          this.volume -= 0.1;
        }else if (direction == &#39;up&#39; &amp;&amp; this._video.volume &lt;= 0.9) {
          this._video.volume += 0.1;
          this.volume += 0.1;
        }
        this.volume = Math.round( this.volume * 10 ) / 10;
        this.vol = this.volume * 100;
        this.volumefade.push(setTimeout(() =&gt; { this.volumechange = false; }, 2000));
      }
    
      /*** Hang up a call ***/
      onCallEnd(btn) {
        if(this.call.getEndCause() != &#39;HUNG_UP&#39;){
          this.call &amp;&amp; this.call.hangup();
        }
        this.navHome(btn);
      }
    
      navHome(url) {
        setTimeout(() =&gt; { this.router.navigate([url]); }, 0);
      }
    
      ngOnDestroy() {
        this.sub.unsubscribe();
        this.timeOutService.inCall = false;
        this.timeOutService.resetTimer.push(setTimeout(() =&gt; { this.router.navigate([&#39;/&#39;]); window.location.reload() }, 100));
      }
    
    }

  [1]: https://i.stack.imgur.com/WoXWw.png


Content Type	Original Author	Original Content on Stackoverflow
Question	enfix	View Question on Stackoverflow
Solution 1 - Android	Juned	View Answer on Stackoverflow
Solution 2 - Android	JohnTube	View Answer on Stackoverflow
Solution 3 - Android	Hank Karl	View Answer on Stackoverflow

VoIP library for Android

Android Problem Overview

Android Solutions

Solution 1 - Android

Solution 2 - Android

Solution 3 - Android

Equivalent of “pass” in Ruby

How to generate scripts to recreate table using SQL Server Management Studio [Schema and data]?

Attributions