Android - (Advanced ?) Usage of my smartphone

Start modes

Hotkeys

• the Samsung Gallery application
• running on Android 13

• my phone stores not only photos I took / received, but also some music
• all my music is stored in a Music/ directory, apart from pictures
• music albums have album art (mostly named cover.jpg)
• the Gallery app displays those pictures mixed with my photos

• I tried the .nomedia hack which is frequently suggested, but depending on I-don't-know-what, it works in some directories and fails in others
• Renaming album art into cover.jpg (with leading capital / full capitals / different name / ) makes no difference

1. start the Gallery application
2. click the bottom-right hamburger icon | Settings
3. disable the Select albums to display option. This actually controls which option will appear hereafter :
   • when enabled : you'll get Select albums to display
   • when disabled : you'll get Select albums to hide
4. leave the Settings page
5. click the Albums bottom tab
6. open the top-right menu | Hide albums
7. select the albums you want to hide

1. return to your Home screen / App screen (the screen having the Gallery icon)
2. long press the Gallery icon until a context menu appears
3. in this context menu, click the top-right ⓘ
4. on this new Application information page, click on Storage
5. click Purge cache
6. enjoy

Don't be stupid : wiping data or using "factory reset" as offered by the recovery menus will just make things harder after you'll have finally fixed the real issue : it would be like tampering with /home while trying to fix Grub. These have no effect on the current problem, leave YOUR data as-is

There are several ways to handle this :

• Restore an existing system backup... if you have one (not tried, google "nandroid")
• Enter recovery mode and reinstall everything (and lose everything). This implies :
  • either having a ROM image on the phone
  • or having a ROM image on an external SD card (?) and reinstall from there (not tried, but could save your life)
  • or reinstalling via ADB sideload (reinstall while streaming the ROM from your computer)
  • or copying the ROM image from the computer to the internal storage (ADB push), then reinstall from this local image
• Gain root shell access to the phone to try to fix things using the Android tools (what I did, read below)

Install Android tools on Debian :

Here starts the fun : time to fix things...

RANDOM NOTES FOR FURTHER REFERENCE :

adb sideload cm-10.1.3-i9100.zip
	error: closed

==> not much success 

adb usb
adb push cm-10.1.3-i9100.zip /sdcard/
adb kill-server;adb start-server

==> not much success 
=================================
adb kill-server;adb start-server
adb shell

if "error: device not found", unplug/replug USB
on phone, from recovery console, mount /system
once in "adb shell", restore backup of /system/build.prop, reboot

==> WORKED 

The following list is from the CyanogenMod forum, and is there "for future use". I've not investigated these parameters so far.

There are many ro.ril parameters which I found from /system/lib/libhtc_ril.so:
ro.ril.a52.%s (gprs encryption algorithm)
ro.ril.a53.%s (gprs encryption algorithm)
ro.ril.ecc.%s (emergency call codes)
ro.ril.def.agps.mode.%s (network assisted gps)
ro.ril.def.agps.feature.%s (network assisted gps)
ro.ril.def.agps.mode (network assisted gps)
ro.ril.def.agps.feature (network assisted gps)
ro.ril.oem.ecclist (emergency call codes)
ro.ril.oem.nosim.ecclist (emergency call codes)


ro.ril.enable.nitz (network informed time zone)
ro.ril.enable.network_identify


qos (quality of service)

ro.ril.qos.maxpdps
ro.ril.qos.traffic.class
ro.ril.qos.max.ul
ro.ril.qos.max.dl
ro.ril.qos.guarantee.ul
ro.ril.qos.guarantee.dl
ro.ril.qos.delivery.order
ro.ril.qos.max.sdu
ro.ril.qos.delivery.err.sdu
ro.ril.qos.transfer.delay
ro.ril.qos.traffic.priority


ro.ril.always.laccid
ro.ril.fast.dormancy.rule
ro.ril.fd.scron.timeout
ro.ril.fd.scroff.timeout
ro.ril.fast.dormancy.plmn
ro.ril.enable.3g.prefix (=1 shows "3g" on lock screen next to network name, =0 does not)
ro.ril.3g.long.name
ro.ril.htcmaskw1.bitmask
ro.ril.htcmaskw1
ro.ril.enable.homezone
ro.ril.enable.vt
ro.ril.enable.regucid
ro.ril.enable.hsdpaind (perhaps ind stands for indicator?)
ro.ril.enable.a52
ro.ril.enable.a53
ro.ril.enable.dcm.feature
ro.ril.enhance.htcdis
ro.ril.enable.tim.feature
ro.ril.enable.korea.stk (Korean Sim Tool Kit)
ro.ril.enable.hsupaind (perhaps ind stands for indicator?)
ro.ril.enable.gea3 (gsm security algorithm)
ro.ril.enable.managed.roaming
ro.ril.enable.enhance.search
ro.ril.disable.mcc.filter
ro.ril.search.first.pnn
ro.ril.enable.ncell.ind (neighboring cell)
ro.ril.enable.enhance.nws
ro.ril.radio.svn
ro.ril.wp.feature
ro.ril.emc.mode
ro.ril.ucsq.mode
ro.ril.disable.power.collapse (said to be an ultra-low power state when phone is in idle, saving battery)
	1 : "yes, please disable the power collapse mode"
	0 : "oh, please leave power collapse mode on"

ro.ril.enable.cnap (Caller Name Presentation)

To do so, we'll append a set of new/improved settings into the /system/build.prop file :

ro.ril.gprsclass=12
ro.ril.hsdpa.category=14
ro.ril.hsupa.category=6
ro.ril.hsxpa=5

1. [on the phone] open a shell with root permissions (via SSH connection, or with Terminal Emulator + su + allow)
2. [on the phone] remount /system in read/write mode : mount -o rw,remount /system
3. [on the phone] make a backup copy of /system/build.prop :
   cp /system/build.prop{,_BITI}
4. [on the phone] chmod 777 /system/build.prop
5. [on the phone] start SSH server
6. [on the computer] scp -P port root@localIpAddress:/system/build.prop .
7. [on the computer] edit locally
8. [on the computer] scp -P port build.prop root@localIpAddress:/system
9. [on the phone] chmod 600 /system/build.prop
10. [on the phone] reboot, enjoy !

Be VERY careful while editing the file : during my tests, to go quicker than copying the file back and forth via SSH, I edited it with Nano directly on the phone (Vim is also available). These editors use key combinations to work, which are not convenient at all on a smartphone : if you make a typo, you may screw your phone up

Flush the whole call log :

Remove only some specific entries from the call log :

This information applies to CyanogenMod 10.1.3 and Android 4.2.2. Things could be different on other versions.

1. on your phone, open the Play Store application
2. select My Applications, then All
3. you'll get the full list of any application you ever installed
4. for each (uninstalled) application you wish to remove from the list, click on the X in the upper-right corner
5. repeat until the list is clean

1. Browse the menus until the parameters of the Clavier Android (AOSP) (See related procedure)
2. in CORRECTION DU TEXTE section : Dictionnaires complémentaires
3. Select and install the required dictionaries

1. Paramètres
2. in PERSONNEL section : Langues et saisie
3. in CLAVIER ET MODES DE SAISIE section, in front of Clavier Android (AOSP) : Parameters
4. Langues de saisie
5. in CLAVIER ANDROID (AOSP) section : Untick Utiliser la langue du système
6. in MODES DE SAISIE ACTIFS section : select the required language(s)

Forgot the "factory reset" / "Wipe cache data" / ... ???

1. Power off the phone
2. Press and hold + and Home
3. Press and hold Power
4. Wait for (factory default) Galaxy S GT-I9000 boot display to show up
5. Release Power before the second boot display with CyanogenMod shows up. Keep holding + and Home.
6. Wait for recovery mode to start. After you see the recovery menu, you can release + and Home.

Key combinations :

How to disable the keyboard haptic feedback system-wide ?

random unsorted notes :

ENABLE DEVELOPER MODE :
http://root.suumitsu.eu/links/?ogMsXw
- Paramètres
- À propos du téléphone
- (descendre tout en bas: "numéro de build")
- appuyer 7 fois sur "numéro de build" : un message indiquera que le mode développeur est activé

GET GOOGLE APPS
http://wiki.cyanogenmod.org/w/Google_Apps
Download package matching CM version (10.1.3 here)
Copy it to SGS2 via USB
Enable developer mode
Enable "Advanced reboot"
Reboot in "Recovery mode"
Install from internal SDCard
Reboot


GET A NEW ROM
	https://download.cyanogenmod.org/?device=i9100
	http://www.clockworkmod.com/rommanager/developers/galaxys2?name=Samsung%20Galaxy%20S2


FLASH A NEW ROM
http://androidforums.com/metropcs-cdma-galaxy-s3-all-things-root/681867-stuck-cyanogenmod-animation.html#post_message_5478896

Stay calm. Something similar happened to me.

List of things you will need:
1. Rooted Phone
2. Clockwork Mod (http://www.clockworkmod.com/rommanager) or other custom recovery tool.
3. A computer
4. A USB cable
5. CyanogenMod ROM or alternatively community ROM.

Step 1: Boot into recovery by pressing the power button, volume UP and home button at the same time.
Step 2: Go to "Mounts and Storage". Select either "mount /sdcard" or "mount /external_sd".
Step 3: Connect your phone to your computer and copy your ROM to the internal or external storage.
Step 4: Wipe cache/data and factory reset.
Step 5: Flash your custom ROM by pressing Apply sdcard update.zip. Alternatively you can select the directory the ROM is located in.
Step 6: ????
Step 7: Reboot
Step 8: PROFIT!!


Easter egg :
Paramètres | A propos du téléphone | Version CyanogenMod (appuyer plusieurs fois) | SURPRISE !