Android Studio – using SensorEventListener.

13/04/2018 by admin · Leave a comment

This tutorial is about programming android hardware sensors service: TYPE_ACCELEROMETER.
You can start by using last version of Android Studio version 3.1.1 with the default project Empty Activity.
Is very simple to use accelerometer with Android Studio by read the values and show us into the text view area.
The SensorEventListener is used to read this values.
The MainActivity will need work with: … implements SensorEventListener.
This example can be used also like a good way to learn about this issues.
Note:

  • the implements is a keyword specific to interfaces, whereas extends is used to inherit classes;
  •  a class must implement all methods of an interface, unless the class is declared as abstract.

You need to change the default text Hello World from activity_main.xml file with this:

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<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">
 
    <TextView
        android:id="@+id/acceleration"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="X: Y: Z:"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toTopOf="parent" />
 
</android.support.constraint.ConstraintLayout>

Make changes into MainActivity.java file
The functions: onSensorChanged and onAccuracyChanged is not created by I.D.E. and can be created by code inspections when you write the source code.

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package org.ft.catafest.accsensordata;
 
import android.hardware.Sensor;
import android.hardware.SensorEvent;
import android.hardware.SensorEventListener;
import android.hardware.SensorManager;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.TextView;
 
public class MainActivity extends AppCompatActivity implements SensorEventListener{
    Sensor accelerometer;
    SensorManager sensor_manager;
    TextView acceleration;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        sensor_manager=(SensorManager)getSystemService(SENSOR_SERVICE);
        accelerometer = sensor_manager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER);
        sensor_manager.registerListener(this,accelerometer,SensorManager.SENSOR_DELAY_NORMAL);
        acceleration = (TextView)findViewById(R.id.acceleration);
    }
 
    @Override
    public void onSensorChanged(SensorEvent event) {
        acceleration.setText("X: "+event.values[0]+
                "\nY: "+event.values[1]+
                "\nZ: "+event.values[2]);
    }
 
    @Override
    public void onAccuracyChanged(Sensor sensor, int accuracy) {
 
    }
}

The result is a text with the values of accelerometer of your hardware.

Posted in All, Android, Programming. Tagged with , , , , .

PowerShell tips – part 009.

09/04/2018 by admin · Leave a comment

Today I come with this simple tutorial about how to show logs from the last day.
The command is very simple and can be used with powershell and administrator command shell like this:

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Get-EventLog Application -After (Get-Date).AddDays(-1)

This command is build from Get-EventLog and parse by Get-Date, see options:

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Get-EventLog
   [-LogName] <String>
   [-ComputerName <String[]>]
   [-Newest <Int32>]
   [-After <DateTime>]
   [-Before <DateTime>]
   [-UserName <String[]>]
   [[-InstanceId] <Int64[]>]
   [-Index <Int32[]>]
   [-EntryType <String[]>]
   [-Source <String[]>]
   [-Message <String>]
   [-AsBaseObject]
   [<CommonParameters>]
Get-Date
   [[-Date] <DateTime>]
   [-Year <Int32>]
   [-Month <Int32>]
   [-Day <Int32>]
   [-Hour <Int32>]
   [-Minute <Int32>]
   [-Second <Int32>]
   [-Millisecond <Int32>]
   [-DisplayHint <DisplayHintType>]
   [-UFormat <String>]
   [<CommonParameters>]

About AddDays is not only option you can use it.
You can get all of this options using this command:

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PS C:\WINDOWS\system32> [DateTime]::Now  |Get-Member -MemberType Method
 
   TypeName: System.DateTime
 
Name                 MemberType Definition
----                 ---------- ----------
Add                  Method     datetime Add(timespan value)
AddDays              Method     datetime AddDays(double value)
AddHours             Method     datetime AddHours(double value)
AddMilliseconds      Method     datetime AddMilliseconds(double value)
AddMinutes           Method     datetime AddMinutes(double value)
AddMonths            Method     datetime AddMonths(int months)
AddSeconds           Method     datetime AddSeconds(double value)
AddTicks             Method     datetime AddTicks(long value)
AddYears             Method     datetime AddYears(int value)
CompareTo            Method     int CompareTo(System.Object value), int Comp...
Equals               Method     bool Equals(System.Object value), bool Equal...
GetDateTimeFormats   Method     string[] GetDateTimeFormats(), string[] GetD...
GetHashCode          Method     int GetHashCode()
GetObjectData        Method     void ISerializable.GetObjectData(System.Runt...
GetType              Method     type GetType()
GetTypeCode          Method     System.TypeCode GetTypeCode(), System.TypeCo...
IsDaylightSavingTime Method     bool IsDaylightSavingTime()
Subtract             Method     timespan Subtract(datetime value), datetime ...
ToBinary             Method     long ToBinary()
ToBoolean            Method     bool IConvertible.ToBoolean(System.IFormatPr...
ToByte               Method     byte IConvertible.ToByte(System.IFormatProvi...
ToChar               Method     char IConvertible.ToChar(System.IFormatProvi...
ToDateTime           Method     datetime IConvertible.ToDateTime(System.IFor...
ToDecimal            Method     decimal IConvertible.ToDecimal(System.IForma...
ToDouble             Method     double IConvertible.ToDouble(System.IFormatP...
ToFileTime           Method     long ToFileTime()
ToFileTimeUtc        Method     long ToFileTimeUtc()
ToInt16              Method     int16 IConvertible.ToInt16(System.IFormatPro...
ToInt32              Method     int IConvertible.ToInt32(System.IFormatProvi...
ToInt64              Method     long IConvertible.ToInt64(System.IFormatProv...
ToLocalTime          Method     datetime ToLocalTime()
ToLongDateString     Method     string ToLongDateString()
ToLongTimeString     Method     string ToLongTimeString()
ToOADate             Method     double ToOADate()
ToSByte              Method     sbyte IConvertible.ToSByte(System.IFormatPro...
ToShortDateString    Method     string ToShortDateString()
ToShortTimeString    Method     string ToShortTimeString()
ToSingle             Method     float IConvertible.ToSingle(System.IFormatPr...
ToString             Method     string ToString(), string ToString(string fo...
ToType               Method     System.Object IConvertible.ToType(type conve...
ToUInt16             Method     uint16 IConvertible.ToUInt16(System.IFormatP...
ToUInt32             Method     uint32 IConvertible.ToUInt32(System.IFormatP...
ToUInt64             Method     uint64 IConvertible.ToUInt64(System.IFormatP...
ToUniversalTime      Method     datetime ToUniversalTime()

Posted in All, Commands, PowerShell, Windows 8. Tagged with , , , , .

C# – First steps with C# and .NET – part 003 .

05/04/2018 by admin · Leave a comment

This tutorial show you how to deal with a C# and forms using Visual Studio Community 2017.
You need to start your project with C# – Windows Form Apps (.NET Framework).
On this default form window project you can change title and some settings like size, colors .
After that , you need to add editbox and label for each area from country , city street and number to window form.
In my example I used text_country for the name of editbox and I let default label1 for the label. The text from label1 I changed to Country to see it on form.
Make this changes for each editbox and label.
You need to have one button named search map point and one webbrowser area to show the location on map.
Next, press on button and make the changes into source code to work with webbrowser area.
The source code is simple – see bellow sorce code and the application screenshot.
The application can be found here:

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using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
 
namespace GoogleMaps
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
 
 
        private void search_Click(object sender, EventArgs e)
        {
            string country = text_country.Text;
            string city = text_city.Text;
            string street = text_street.Text;
            string nr = text_nr.Text;
            try {
                StringBuilder querryadress = new StringBuilder();
                querryadress.Append("https://www.google.ro/maps/place/");
                if(country != string.Empty){
                    querryadress.Append(country+"+");
                }
                if (city != string.Empty)
                {
                    querryadress.Append(city + "+");
                }
                if (nr != string.Empty)
                {
                    querryadress.Append(nr + "," + "+");
                }
                webBrowser1.Navigate(querryadress.ToString());
            }
            catch (Exception ex){
                MessageBox.Show(ex.Message.ToString(),"Error search location...!");
            }
        }
    }
}

Posted in All, C#, Programming, Windows 10, Windows 8. Tagged with , , , , , , .

Go – about errors .

05/04/2018 by admin · Leave a comment

The golang come with a fair amount of functions end up returning errors like values.
The golang errors functions looking like this:

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func (ex *StructExample) Function() (string, error)
bytes, err := StructExample.Function()
if err != nil {
  // this process the error of StructExample
}

You can use the errors package and that implements functions to manipulate errors.
The official golang example:

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package main
 
import (
"errors"
"fmt"
)
 
func main() {
err := errors.New("emit macho dwarf: elf header corrupted")
if err != nil {
fmt.Print(err)
}
}

You can see how is created the new custom errors using the New function:

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errors.New("You got a error !")

The fmt package formats an error value by calling its Errorf() string method, see example:

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package main
 
import "fmt"
 
func main() {
    err := fmt.Errorf("ordinary error")
    fmt.Printf("%#v\n", err)
}

You can add more information about the error using struct type and fields.
The error type is an interface type and can be used into this way.

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type error interface {
    Error() string
}

And an error variable represents any value that can describe itself as a string, see example:

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type manyError struct {  
    err    string
    initials string
}

Posted in All, Go, Programming. Tagged with , , , , .

News: Snort tool version 2.9.11.1 for Windows .

29/03/2018 by admin · Leave a comment

This is a news and a simple fix tutorial about this tool.
The Snort tool version 2.9.11.1 for Windows is easy to install and use it.
You can download it from here.
First you need to create an account to the official website to download the rules and also to use the winpcap tool.
You need make all settings for snort.conf file into etc folder.
Because I used then I fix this:

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webroot no
#    webroot no \
#    decompress_swf { deflate lzma } \
#    decompress_pdf { deflate }

Don’t worry for some warnings about ERROR: null(0) Failed to parse the IP address:
Then you can use the administrator command shell to run it:

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c:\snort\bin&gt;snort -dev -l c:\snort\log -h 192.168.1.66 -c c:\snort\etc\snort.conf

The result of this command is this output:

Posted in news. Tagged with , , , , .
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