Dalvik VM Internals

Dan Bornstein (Google)

Dalvik — the virtual machine with the unusual name — runs your code on Android. Join us to learn about the motivation for its design and get
some details about how it works. You’ll also walk away with a few tips for how to write code that works well with the platform. Be prepared
for a deep dive into technical details. Questions encouraged!

Presentation Slides

android vpn

Published on Sep 15, 2012

Aplicaciones usadas en este tuto
OpenVPN Installer
OpenVPN Settings
Android Terminal Emulator
(estas 3 son gratuitas en la playstore)

“su” (sin comillas) y presionamos enter
despues ponemos “insmod sdcard/tun.ko” y presionamos enter


Link dl Kebrum + tun.ko
4shared: www.4shared.com/zip/egh8cmxK/Internet_gr­atis.html?
mediafire: www.mediafire.com/?8i3gsc6rd5wky33

Hotspot Shield VPN for Android

rooting android

Kingo Android ROOT

Con root podemos tener acceso a aplicaciones que de otra manera no podríamos ejecutar y realizar cosas como crear copias de seguridad de ciertas partes del sistema, cambiar la frecuencia de la CPU para que vaya más rápido ó lento dependiendo si queremos rendimiento o ahorrar batería, hacer capturas de pantalla, usar de ciertos programas de PC, usar nuestro teléfono como router Wi-Fi, pero considero que lo más importante es la posibilidad de instalar ROMs costumizadas.
aki el archivo root: http://www.mediafire.com/?0o3qxdphs4m…

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Samsung Galaxy Ace (GT-S5830)

El Samsung Galaxy Ace se encuentra por debajo de la línea de rango del Galaxy S en la gama de smartphones de Samsung con Android, y tiene una terminación muy bonita, con un aspecto de primera calidad, gracias a su acabado de alto brillo y por la tira metálica que tiene en los bordes. El Samsung Galaxy Ace funciona con Android 2.2, que es lo habitual en los teléfonos Android actuales, aunque la versión 2.3 (Gingerbread) habría sido la fresa del pastel. Como de costumbre, Samsung ha cubierto Android con su propia interfaz de usuario, TouchWiz 3.0, para hacer la experiencia más amigable para el usuario. TouchWiz añade varias mejoras a la cruda experiencia de Android, incluyendo una integración más estrecha con los contactos de tus redes sociales.

La pantalla LCD en el Ace tiene un buen tamaño de 3,5 pulgadas, que es apropiado para este nivel de precio, aunque en este rango de precio, el HTC Desire tiene una pantalla algo mayor, de 3,7 pulgadas. La resolución de pantalla es de 320 x 480 píxeles.

El resto del hardware en el Samsung Galaxy Ace es decididamente de gama media también. El procesador de 800 MHz no se queda atrás, pero la memoria interna de 158MB limita el número de aplicaciones que se pueden almacenar. La memoria se puede ampliar hasta 32 GB con una tarjeta de memoria, pero aún así sería bueno tener más memoria integrada en el propio dispositivo. La batería de 1350mAh es suficiente, pero los teléfonos Android realmente gastan mucha pila y hubiera sido bueno haber visto a una batería más potente en el Ace.

Sin embargo, este Samsung es un teléfono de gran alcance con muchas características, incluyendo un reproductor de música, radio FM con RDS, GPS asistido con Google Maps, además de acceso a la gama completa de aplicaciones desde el Android Market. La conectividad cumple todos los requisitos, con Wi-Fi, Bluetooth, USB y un conector para auriculares de 3,5 mm. Hay un acceso rápido a Internet HSDPA también en una red 3G. Navegar por la Web es una experiencia bastante buena, con la combinación de un procesador rápido, acceso rápido de datos y una pantalla de buen tamaño. Aquí una vez más, sin embargo, la resolución de pantalla es algo limitada y los textos pueden ser algo difíciles de leer, como en muchos teléfonos Android.

Continue reading “Samsung Galaxy Ace (GT-S5830)”

Google Nexus

Google Nexus is a line of mobile devices using the Android operating system produced by Google in conjunction with an original equipment manufacturer (OEM) partner. Devices in the Nexus series[1] do not have manufacturer or wireless carrier modifications to Android (such as custom graphical user interfaces), and have an unlockable bootloader[2] to allow further development and end-user modification.[3] Nexus devices are the first Android devices to receive updates to the operating system.[4][5][6] The Galaxy Nexus is one of the few smartphones recommended by the Android Open Source Project for Android software development.[7] As of November 2012[update], the latest devices in the series are the Nexus 4 phone by Google and LG, and the Nexus 7 and Nexus 10 tablet computers by Google with Asus and Samsung respectively.


Is the allure of being a superuser tempting you? Android rooting opens up a world of possibility, but it can also void your warranty, or even leave you with a bricked device. The important thing is to be careful. Read up about what you are going to do before you begin. Make sure that you backup your data. Follow the instructions to the letter. Manufacturers and carriers have a vested interest in dissuading you from rooting. If you’re careful, the risk is minimal, and the potential benefits are impressive. Let’s take a closer look.

Around since the early days of the T-Mobile G1 (HTC Dream), rooting can add functionality to a phone and often extend the life of the device. The T-Mobile G1, for instance, was officially supported through Android 1.6 Donut, but if you rooted the phone, you could load an alternative developer-made version of the OS that offered most of Android 2.2 Froyo’s features.

I’m going to share some of rooting’s benefits and risks, where to find some great replacements for the default Android OS, and a few other tips. If you have any of your own that I haven’t covered here, please add them to the comments below.

What is rooting?

Rooting, in a nutshell, is the process that provides users with full administrator control and access to an Android smartphone or tablet. Similar to “jailbreaking” an iOS device, this is often done in order to bypass carrier or handset maker limitations or restrictions. Once you achieve “root access,” you can replace or alter applications and system settings, run specialized apps, and more.

One of the more common reasons to root a phone is to replace the operating system with a ROM, another developer’s version of the OS that also gives you more control over details. In rooting culture, we’d call that “flashing a custom ROM.”

The process of rooting an Android phone varies for each device, but seems to have been streamlined over time. Google’s Nexus line of phones, such as the LG-made Nexus 4, appeals to developers and techie types and are among the most often rooted models. With that in mind, you’ll also find that popular devices like the Samsung Galaxy S3 and HTC One X+ have plenty of custom ROMs to choose from.

Note that rooting will void the device warranty; however, flashing a stock ROM can revert things back to their original state.

Why root?

There are multiple reasons for you to consider rooting your Android handset, some more obvious than others. Chief among the benefits is the ability to remove any unwanted apps and games that your carrier or phone maker installs before you ever unwrap your phone. Rather than simply disabling these bloatware titles, which is often the best you can do within Android, rooting can grant you a full uninstallation. Deleting apps you’ll never use can also free up some additional storage capacity.

Another main benefit of rooting is to enable faster platform updates. From the time it takes for Google to announce a new version of Android to the time your carrier pushes it to your device can be on the order of weeks, months, or even longer. Once rooted, you can often get some of the new platform features through custom ROMs in short order. This could, for some users, add years of life to an Android handset — rather than buy a new phone, flash a new ROM.

Other reasons to root a phone include being able to perform complete device backups, integrate tethering and mobile hot-spot features, and extend the device’s battery life through newfound settings and controls.

How to root your Android

What are the risks?

As I mentioned above, rooting your device can void your warranty. This is perhaps the biggest risk associated with playing around with your phone. If you run into big trouble and you’ve added a custom ROM build, your manufacturer and carrier likely won’t help you out.

In most cases, you’ll be able to overturn any ROM you flash, returning to the phone’s stock Android OS with as much ease as you installed the new ROM in the first place. However, a word of caution. If you’re not careful, or don’t follow the steps properly, you could end up with a glorified paperweight. Yes, I’m talking about “bricking” your device. It’s vitally important that you exercise caution when attempting to root your phone and pay close attention to what you’re doing.

Stick to the more reputable sources for help and feedback, and look for the most recent news about ROMs and your particular Android device. Along those lines, you’ll also want to ensure that you read through everything you can before starting down this road. If you’re in a forum thread, skim the replies to see if there are issues or problems with your particular handset.

Helping hands

For help with rooting, I would first recommend XDA developers, AndroidCentral forums, Androidforums, and Rootzwiki. I also suggest checking Google+ as a good source for rooting and modding news and feedback. The rooting scene is not some secret underground Fight Club; you’ll find plenty of documented help for rooting your phone. Filter your results by date, read through the details, and understand what it is you are about to do.

CyanogenMod is one of the oldest and feature-rich ROMs available.(Credit: CyanogenMod)

More about ROMs

For all practical purposes, (custom) ROMs are replacement firmware for Android devices that provide features or options not found in the stock OS experience. Often built from the official files of Android or kernel source code, there are more than a few notable ROMs to consider. Among the more popular custom ROMs are CyanogenMod, Paranoid Android, MIUI, and AOKP (Android Open Kang Project). There are, of course, countless others to check out, with more arriving almost daily.

In terms of sheer support and development, CyanogenMod is the clear leader in this field. The number of supported devices is unparalleled and the community has long rallied around this ROM. This is not meant to say that it’s necessarily the “best” ROM; beauty is in the eye of the beholder.

Closely resembling the stock Android experience, CyanogenMod has been known to introduce features that later end up in official builds of Android. As of today there are more than 4.2 million active installations of CyanogenMod releases, with v10.1 (based on Android 4.2 Jelly Bean) being the latest.

Paranoid Android is one of the more popular custom ROMs for Android.(Credit: Paranoid Android)

Where to look for ROMs

Forums are going to be a great place to keep yourself plugged in, but the larger ROM developers will provide their own Web sites. Aside from the aforementioned custom ROMs, others that have gained a strong following include SynergyROM, Slim Bean, LiquidSmooth, RevoltROM, and Xylon. Be warned: talking about ROMs can often result in heated debate as to which is better or offers more options.

Noteworthy apps

Aside from installing custom ROMs, rooting your phone opens the door to installing new apps and gaining extended device management and security functionality beyond what comes with the usual Android OS experience.

Should you decide to not load a new ROM interface, you can still install apps that add new levels of functionality to your rooted Android phone. Today’s more popular titles include ROM Toolbox Pro, Titanium Backup, Touch Control, Cerberus anti-theft, and SetCPU. The appeal of each will vary depending upon on how much you want to tweak your Android experience.

For those of you who plan to flash ROMs on a regular basis, I recommend starting with ROM Manager. This utility lets users manage backups and recoveries, install ROMs, and other handy functions. While it is available as a free app, the premium client has ROM update notifications, nightly ROM downloads, set automatic backups, and other features.

ROM Toolbox Pro is a handy utility for rooted users.(Credit: JRummy Apps)

Backup plans

When it comes to rooting your phone, it is always a good idea to have backup plans in place. After all, you’ll need something to fall back on should you run into an issue with an untested or experimental ROM. While Titanium Backup seems to be the most popular, Carbon has gained quite a fan base of late. Regardless of which route you take, it’s important to create a backup and test it before you apply a custom ROM.

Become familiar with the process and make sure that you’ll be able to restore things in the event of a catastrophe. It might take some practice and you could spend more time than you’d like creating this backup, but it could be all that stands between you and expensive phone repair.

Indeed, there is plenty to consider when it comes to rooting your Android phone. Rest assured, though, that no matter how daunting the task might seem, there’s a large community of users out there who will have your back. And while the actual rooting process varies with each handset model, on the whole, it isn’t as difficult as it may sound.

If you’ve read through this post and still don’t know if rooting is for you, my suggestion is to give it more time and mull it over. Replacing the default Android OS certainly isn’t for everyone and there’s quite a bit more on the topic besides. For many people, myself included, the rewards of tweaking your Android phone to have it exactly the way you want it are worth the risk.

What is rooting?

If you’re an Administrator on a Windows machine, you have access to the entire operating system and you can do whatever you like. That’s essentially what happens if you root your Android device. With root access, you can get around any restrictions that your manufacturer or carrier may have applied. You can run more apps; you can customize your device to a greater degree; and you can potentially speed it up in a variety of ways.

The process involves backing up your current software and then flashing (installing) a new custom ROM (modified version of Android).

Why would you root?

One of the most obvious incentives to root your Android device is to rid yourself of the bloatware that’s impossible to uninstall. You’ll be able to set up wireless tethering, even if it has been disabled by default. You can also access your entire file system, install special apps that require a root, and flash custom ROMs, which can add extra features and streamline your phone or tablet’s performance. A lot of people are tempted by the ability to completely customize the look of their phones. You can also manually accept or deny app permissions.

You won’t find a lot of amazing must-have apps when you root, but there are enough to make it worthwhile. For example, some apps allow you to automatically backup all of your apps and all of their data, completely block advertisements, create secure tunnels to the Internet, overclock your processor, or make your device a wireless hotspot.

Why wouldn’t you root?

There are essentially three potential cons to rooting your Android.

  • Voiding your warranty: Some manufacturers or carriers will use rooting as an excuse to void your warranty. It’s worth keeping in mind that you can always unroot. If you need to send the device back for repair, simply flash the original backup ROM you made and no one will ever know that it was rooted.
  • Bricking your phone: Whenever you tamper too much, you run at least a small risk of bricking your device. This is the big fear everyone has. The obvious way to avoid it happening is to follow instructions carefully. Make sure that the guide you are following works for your device and that any custom ROM you flash is designed specifically for it. If you do your research and pay attention to feedback from others, bricking should never occur.
  • Security risks: Rooting may introduce some security risks. Depending on what services or apps you use on your device, rooting could create a security vulnerability. For example, Google refuses to support the Google Wallet service for rooted devices.

How to root your Android

Before you actually try to root your device, make sure that you do some reading. The best place to find discussions about rooting, guides, and custom ROMs is definitely the XDA Developers Forum. Look for a thread on your specific device and you’re sure to find a method that has worked for other people. It’s worth spending some time researching the right method for your device.

Preparation for root

You’ll want to ensure that your device is fully charged before you begin. You’ll also need to turn USB debugging on. On the Galaxy S3 you’ll find it in Menu > Settings > Developer options and then check the box next to USB debugging. You will likely be plugging your device into your computer in order to root it.

Most Android rooting methods require you to install some software on your computer. It’s likely you’ll need to install the Android SDK. You may find other software is required. Make sure you follow the instructions and install all of it before proceeding.

One-click rooting

One of the easiest methods of rooting, which also supports a long list of devices, is SuperOneClick. You’ll find clear instructions, including a video, on how to use it at this XDA Developers SuperOneClick thread.

You will need to install some software to prepare, but the actual rooting process is one click. It will only take a few minutes to complete and then you’ll need to restart your Android device.

There is software out there that claims to provide one click rooting with no extra installs, but you should not have to pay to root your device and it’s very important to be wary about the method you choose. If in doubt, do more research. The XDA Developers forum is the most trustworthy source for rooting guides.

Your specific device

The reason rooting isn’t more straightforward is that all Android devices are not created equal. There are significant differences between Android smartphones, between manufacturers, and even between carrier specific versions of the same phone model. Make sure that any rooting guide or custom ROM you intend to use does support your specific device or you are asking for trouble.

Once you have found the right guide for your phone or tablet, it’s simply a case of working through the listed steps methodically. It can be a complicated procedure and it can take a while. Here’s an example guide for rooting the Samsung Galaxy S3. It can appear intimidating at first glance, but provided you follow it step-by-step, it should be a pain-free process. You can post questions in the XDA Developers forum if you run into trouble.

To root or not to root

Gaining full root access to your Android device can be thrilling, especially if you want to tinker with settings and customize your device. How much it changes your experience depends largely on the device you have. If you have a shuttered device, like a Kindle Fire tablet, then it’s a great way to get the full Android experience.

The potential benefits for all Android users include improved battery life, root-only apps, custom ROMs, overclocking, an end to bloatware, improved performance, and the ability to upgrade your phone when you want. If you aren’t excited at the prospect of any of these things, rooting probably isn’t for you.

Read more: http://www.digitaltrends.com/mobile/how-to-root-android/#ixzz2VG0X985Z
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Continue reading “rooting”

titanium backup cloud upload fails

I’m able to backup to Google Drive and Dropbox, but it’s a bit fragile. TB coding for the syncs/backups is really not very robust. The notifications are pretty nondescript and there is no real logging. It seems to me that any glitch in the data transfers cause the syncs to exit, rather than execute any retries.
I’m having some troubles too im on TBP 5.6 and whenever i sync to either drop or drive i get “upload to google drive failed network error”. However i dont need to resume, i can continue. Im not sure if those backups are viable since it was disconnected so many times. The backups work, but the code seems to me to be not very robust. You need to watch your notifications to make sure the backup was successful, and if not, run another one manually.

It’s annoying, and I don’t think it’s going to change.

Google Drive and Dropbox give network errors when trying to upload. I bought Titanium Backup Pro specifically for cloud sync. The first time, it synced about 300 MB to my Google Drive account, but then the backup stopped. Now it doesn’t even sync that much anymore; it just fails – BOTH on Google Drive and on Box. For Google Drive it tells me there was a “Network error”, for Box it tells me: “Internal error com.android.providers.settings.apk.lzop”

Try Foldersync.

Had some issues originally syncing to the cloud where it always failed and it turned out to be Google music related. Specifically I think it was the amount of offline files it couldn’t sync or maybe it was a database, I don’t recall but basically I setup a new job to sync very little and slowly increased it until I figured out what the issue was.

Delete the backup for the apk listed in the error message, then back the app up again. That’s fixed Dropbox sync issues for me on multiple occasions.

install Apps in memory card in galaxy fame

galaxy fame S6812.

All applications are installed into device memory by default and I could not move the installed apps into memory card. And there is no option “Move to SDCard” in device application manager. I have tried with some tools (like App to Sd card) but failed.

If rooted “Folder Mount” may help and the description on google play gives quite a good explanation.

Android 4 and upwards does not really expect there to be SD cards and does not include the ability to install apps on SD (Samsung thankfully continue to provide the facility of an SDcard for data – although Nexus phones don’t)

Many apps have settings which allow data to be saved to SD card rather than “internal storage” Normally on samsungs, the internal storage is a folder called /storage/sdcard0 and the real removeable SD card is something like /storage/ExtSdCard (name from Note2)