Install Flutter in android studio 3.3.1

Install Flutter in android studio 3.3.1

1. Open SDK Manager
2. Click "Plugins"
3. In search box type "Flutter" then click "Search in repositories"
4. Select Flutter Language and install
5. Read all requirement and accept it. It will install Dart as requirement.
6. Restart your android studio

android studio 3.3.1 and google admob change

change/update google service library:

• com.google.android.gms:play-services-ads:16.0.0 -> com.google.android.gms:play-services-ads:17.1.2
• com.google.android.gms:play-services-auth:16.0.0 -> com.google.android.gms:play-services-auth:16.0.1

To import and use google admob (service-ads), you must add this into application manifest:
<manifest>
<application
...
>
<meta-data
android:name="com.google.android.gms.ads.APPLICATION_ID"
android:value="ca-app-pub-################~##########"/>
...
</application>

Windows: Track which application establish connectiion using cmd

To find out establish connection and its id process use netstat -no and find
D:\>netstat -no | find "EST"
  TCP    127.0.0.1:61319        127.0.0.1:61320        ESTABLISHED     2636
  TCP    127.0.0.1:61320        127.0.0.1:61319        ESTABLISHED     2636
  TCP    127.0.0.1:61321        127.0.0.1:61322        ESTABLISHED     11224
  TCP    127.0.0.1:61322        127.0.0.1:61321        ESTABLISHED     11224
  TCP    127.0.0.1:61324        127.0.0.1:61325        ESTABLISHED     5016
  TCP    127.0.0.1:61325        127.0.0.1:61324        ESTABLISHED     5016
  TCP    127.0.0.1:61329        127.0.0.1:61330        ESTABLISHED     5920
  TCP    127.0.0.1:61330        127.0.0.1:61329        ESTABLISHED     5920
  TCP    127.0.0.1:61343        127.0.0.1:61344        ESTABLISHED     4524
  TCP    127.0.0.1:61344        127.0.0.1:61343        ESTABLISHED     4524
  TCP    192.168.0.108:60442    52.230.84.0:443        ESTABLISHED     3140
  TCP    192.168.0.108:61323    139.193.253.91:80      ESTABLISHED     2636
  TCP    192.168.0.108:61331    216.239.38.120:443     ESTABLISHED     2636
  TCP    192.168.0.108:61341    172.217.194.95:443     ESTABLISHED     2636
  TCP    192.168.0.108:61355    74.125.200.101:443     ESTABLISHED     2636
  TCP    192.168.0.108:61356    172.217.194.17:443     ESTABLISHED     2636
  TCP    192.168.0.108:61357    172.217.194.84:443     ESTABLISHED     2636
  TCP    192.168.0.108:61360    172.217.194.132:443    ESTABLISHED     2636
  TCP    192.168.0.108:61365    74.125.200.139:80      ESTABLISHED     2636
  TCP    192.168.0.108:61372    74.125.68.94:443       ESTABLISHED     2636
  TCP    192.168.0.108:61375    74.125.130.113:443     ESTABLISHED     2636
  TCP    192.168.0.108:61385    74.125.24.94:443       ESTABLISHED     2636
  TCP    192.168.0.108:61386    74.125.24.17:443       ESTABLISHED     2636
  TCP    192.168.0.108:61387    172.217.194.94:443     ESTABLISHED     2636
To find out which application for parcular id use tasklist -v and find
D:\>tasklist /v | find "2636"
firefox.exe                   2636 Console                   17    258,080 K Running         [pc]\[username]                                       0:00:34 Articles: New - Garasiku - Administration - Mozilla Firefox
Firefox accessing internet using local port 2636.

Windows 10: Disable Windows Defender Real-time Protection

Sometimes, we need to turn off Windows Defender Real-time protection. In my experience, this software may cause some error to run Android Emulator such as BigNox. To disable Windows Defender Real-time protection do these steps:

1. Run Windows PowerShell as administrator
2. execute set-mppreference -DisableRealtimeMonitoring 1

Windows PowerShell
Copyright (C) Microsoft Corporation. All rights reserved.
PS C:\WINDOWS\system32> set-mppreference -DisableRealtimeMonitoring 1
PS C:\WINDOWS\system32>
In Windows registry it will create
Computer\HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows Defender\Real-Time Protection -> DisableRealtimeMonitoring REG_DWORD 1
To disable permanently you can use regedit as steps below:

1. Create key Real-Time Protection under HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender\
2. Create Dword DisableRealtimeMonitoring 1 under HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender\Real-Time Protection\

It will locked option in Real-time Protection "This setting is managed by your administrator".
Tested on Windows 10 Version 10.0.17134 Build 17134
References:
https://www.tenforums.com/tutorials/3569-turn-off-windows-defender-real-time-protection-windows-10-a.html

Debian Stretch: Scanner and Sane

For old scanner like my Umax 3450, it is impossible to get windows x64 driver. Its driver only available for windows 32. Manufacture refuse to build windows x64 driver.
But it does not matter in Linux in my case Debian. It will available in both Debian x64 and x32.

To list your scanner detected by Debian

# lsusb
Bus 001 Device 003: ID 0408:0f21 Quanta Computer, Inc.
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 003 Device 002: ID 18e8:6260 Qcom
Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 002 Device 004: ID 1606:0060 Umax Astra 3400/3450
Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub

Use Sane to detect your scanner

# sane-find-scanner

  # sane-find-scanner will now attempt to detect your scanner. If the
  # result is different from what you expected, first make sure your
  # scanner is powered up and properly connected to your computer.

  # No SCSI scanners found. If you expected something different, make sure that
  # you have loaded a kernel SCSI driver for your SCSI adapter.

found USB scanner (vendor=0x1606 [UMAX], product=0x0060 [USB SCANNER], chip=LM9832/3) at libusb:002:004
  # Your USB scanner was (probably) detected. It may or may not be supported by
  # SANE. Try scanimage -L and read the backend's manpage.

  # Not checking for parallel port scanners.

  # Most Scanners connected to the parallel port or other proprietary ports
  # can't be detected by this program.

To list available scanner to use

# scanimage -L
device `plustek:libusb:002:004' is a UMAX 3450 flatbed scanner

To use your default scanner to scan image

# scanimage >image.pnm

or use XSane to use your scanner

References:

• https://wiki.debian.org/Scanner