MOBILE

Update Your Android Tablet (Part 3)

11/15/2012 9:19:35 AM

Capitalism rules

Capitalism rules

For legal reasons, Google Play and other Google apps can’t be included in custom builds of Android and must be installed separately. If you haven’t already connected to your wireless network, open a browser and go to www.bit.ly/9E29YP. This is the CyanogeMod 9 ICS will be there soon, too.

Reboot disappointment

Reboot disappointment

The Archos system is set to auto-install the Google App zip file you downloaded after a reboot. This instigates a fresh installation sequence and sets up the Market. You may notice that not all the apps you’d expect are available. This is glitch that affects emulators and custom builds, but there is sometimes a way around it.

Market hack

Market hack

To improve the selection of apps, open ‘Settings’ and select ‘Applications > Manage applications > All’. Find the Market, click ‘Force stop’ if available and then ‘Clear cache’, but not ‘Clear data’. Return to the list, now locate ‘Google Services Framework’ and select ‘Clear data’. Reboot, then start the Market for a wider selection.

Upgrade android

Archos! Bless you

Archos! Bless you

Archos tablets go by various names, but most devs refer to them by generational names. So the Archos 5 and 7 IMT are Gen6 devices. The Archos 5 IT is Gen7 and the Archos 101, 80 and 70 are Gen8. Go to www.archos.com and select ‘Support > Downloads and special developer edition firmware.’ Grab the version for your device.

One step beyond

One step beyond

Warning: flashing the SDE invalidates the warranty and removes the ability to play DRM content. To install the SDE, power off the Archos, then turn it on while holding volume down. The Archos screen appears and then the white Recovery mode appears. Use volume buttons to highlight ‘Update firmware’ and power button to select it.

Custom modes

Custom modes

Connect the Archos to your PC via its USB port and make sure it’s powered from the mains adaptor. Copy the downloaded AOS file to the root of the Archos drive. Eject the device from Windows and press the power button to install the SDE. To boot the alternative OS when powering up or rebooting, hold down both volume buttons.

Flash master

Flash master

Go to www.bit.ly/sXWO4S to get the latest version of zlmage and initramfs. Boot the Archos into recovery mode and select ‘Recovery system > Developer edition menu > Flash kernel and initramfs.’ Connect it to your PC and copy both files to the root of the Archos. Unmounts the Archos and let the tablet install and reboot.

Gingerbread device

Gingerbread device

Get the build for your tablet from www.bit.ly/uokKrL. Connect the tablet to the PC and boot into Recovery boot. Select ‘Recovery system > Repair system > Start USB MSC’. Copy the file to the root of the tablet, name it openaos-gingerbread.img.gz and eject the device. Press the power button and pick ‘Reboot.’

Boot me

Boot me

Hold both volume button to select the Development Mode boot. If you named the Gingerbread file correctly, it will be list. Select it with the power button and Android will appear so you can run through the standard setup. Follow the guides adding Android Market and getting the best from CyanogenMod.

Cyanogenmod overclockings

Built-in controls

Built-in controls

CyanogenMod provides a performance section. Select ‘Settings > CyanogenMod settings > Performance > CPU settings’. You’ll find maximum and minimum values for CPU speed; it’s best to keep the minimum at the lowest, but ramp up the max as far as you like. The Archos defaults to 800MHZ, but the CPU is designed to run at 1GHZ.

Alright Governor

Alright Governor

The governor dictates how the tablet controls the CPU speed. Conservative increases the speed slowly and decreases faster, saving power. Performance ramps up quickly and down slowly, using more power. Ondemand is a binary straight to maximum and minimum, while Interactive provides a real-time response to CPU demand.

Custom tools

Custom tools

Google Play and other platforms provide additional overclocking tools, however the range of frequencies they offer is still dictated by the installed OS. Many, including AnTuTu CPU Master, provide Governor-style controls to help you eke out more battery performance or mitigate any impact overclocking has on battery life.

Battery optimization

Learn what the biggest battery drain is and cut back; adjust the screen’s brightness or turn off Wi-Fi

Something all manufacturers need to learn from Apple is that to get the best possible device in terms of battery life, you have to get the OS to play as nicely as possible with the hardware. We’re tried devices with early alpha ports of Android, and due to issues with wireless adaptor drivers, sleep modes, screen drivers and so on, battery life is a couple of hours at best. Compare that with an iPad’s run time of up to 10 hours playing video and a week on standby…

The good news is that these are usually temporary issues, because developers can tweak these problems out. Even so, you may need to disable the wireless to help extend sleep battery life. There are several apps that can help automate these tasks, depending on whether you take the tablet out and about. Juice Defender is a good option. This comes in a number of free and paid-for options with more features, including location-aware toggles. A simpler option is the free Auto WiFi Toggle, which enables you to specify schedules and behavior for when and how the wireless should be used. Simply turning off a tablet’s wireless adaptor can help extend battery life from a day to almost a week.

An ageing Android

The number of Android devices can be bewildering, and the number of versions of the Android OS beyond the standard releases from Google, known as fragmentation, even more so. While it’s often referred to in a negative way, fragmentation is one of Android’s strengths, enabling custom versions and cheaper devices to be released. The low cost comes partly from not bothering to support a device once it’s released. Thanks guys!

The original versions of Android are v1.1, v1.5 Cupcake and v1.6 Donut. Incredibly, v1.6 devices were still around even in 2011. We strongly recommend against these versions. Android 2.0 Éclair is where things get interesting, with v2.2 Froyo being really the lowest version you want, as it offers many advanced features such as Wi-Fi hotspots. Currently, 2.3.7 is the latest release of Android v2.3.x Gingerbread, and it includes a lot of optimizations. Android v3.x Honeycomb was rushed out for the original Android tablets, and the source was never released publicly because Google wanted a single build for all devices. That build is Ice Cream Sandwich, also known as Android 4.0. We expect most current devices to get an official or homebrew upgrade – the base specification is any device with 256MB of memory and a suitable GPU.

Hackable hardware choices

The dual-core HP TouchPad was the best-selling non-Apple tablet when discounted to $148.5 last year

We’ve chosen the Archos 70 Tablet for two reasons: it can be picked up for $150 from Carphone Warehouse and it has an active hacking community. That price gets you a capacitive 7-inch tablet with a 1GHz ARM processor and 256MB of memory, 8GB storage with SD card expansion. This is everything you need from a basic tablet. There are cheaper models, but these tend to have horrible resistive screens, less internal storage and slower processor. More importantly, they may not have an active community behind them.

But what other options are there? To start, consider the Archos 101 internet tablet, it’s a 10.1-inch version of the Archos 70, but specifically enables dual-booting so you can install any suitable OS you like. It can be picked up for around $225 from certain suppliers. If you want something faster, the HP TouchPad is a dual-core system that has an active community working on an Android 4.0 port. As HP no longer make these, it’s harder to pick them up from anywhere other than eBay. Another good dual-core choice is the Advent Vega from PC World. It has a good molding community and can be bought for around $298.5 or less when on offer.

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