Hello World - Your First Android App

Recently I was looking into the option of porting my vb.net application to android. So here is a tutorial on how to write your very first android applications.

What you need:

Java knowledge
Java SDK v6.0 or above
MotoDev (Based on Eclispe) - http://developer.motorola.com/docstools/motodevstudio/download/
Android SDK (latest) - http://developer.android.com/sdk/index.html

I also recommend reading about how the android system works, the manifest file, gui file(main) ,R.java etc.


To start out instal JDK, Android SDK and update, MotoDev studio.
Set up a AVD.  
In motoDev now create a new Project and give it a appropiate name.


You will notice that the an Android application is based on the Activity class, and always reference to R.java.


Change the code in activity to corospond with the following:
import android.widget.TextView;

public void onCreate(Bundle savedInstanceState) 

{
       super.onCreate(savedInstanceState);
         TextView tv = new TextView(this);
       tv.setText("Hello, Android");
       setContentView(tv);
   }

The enlarged code is the code changed or added.

The onCreate() method is used to start your activity.

In android objects is referred to views. 

TextView will be the equvalint to an Label in .net programming or swing.

Now Run the application.

Dynamic Create Controls on Runtime

Here is my quick guide on how to generate ImageHolder Buttons on runtime. This is perfect and works nice with inventory systems or payroll applications.(ID picture of employee)

First of all create a new vb.net project, drag a panel onto your form.
Double click on your form to open up the Form_Load() method and Return to design view.

Paste Excel Data Into DataGrid in VB.net

How to paste excel clipboard data in datagrid:

Private Sub PasteClipboard()

        Dim s As String

        Try

      

            s = Clipboard.GetText()

            Dim i, ii As Integer

            Dim tArr() As String = s.Split(ControlChars.NewLine)

            Dim arT() As String

            Dim cc, iRow, iCol As Integer

            iRow = DataGridView1.SelectedCells(0).RowIndex

            iCol = DataGridView1.SelectedCells(0).ColumnIndex

            For i = 0 To tArr.Length - 1

                If tArr(i) <> "" Then

                    arT = tArr(i).Split(vbTab)

                    cc = iCol

                    For ii = 0 To arT.Length - 1

                       If cc > DataGridView1.ColumnCount - 1 Then Exit For

                       If iRow > DataGridView1.Rows.Count - 1 Then Exit Sub

                        With DataGridView1.Item(cc, iRow)

                            .Value = arT(ii).TrimStart

                        End With

                        cc = cc + 1

                    Next

                    iRow = iRow + 1

                End If

            Next

        Catch ex As Exception

            MsgBox("Please redo Copy and Click on cell")

        End Try

    End Sub

Just change the value of DataGridView1 to the objectname of your DataGrid. This can paste rows and columns.