create Button (BB10)

touch draw on Bitmap (android)

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public class MainActivity extends Activity implements OnTouchListener { ImageView imageView; Bitmap bitmap; Canvas canvas; Paint paint; float bx = 0; float by = 0; float dx = 0; float dy = 0; float ex = 0; float ey = 0; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); this.requestWindowFeature(Window.FEATURE_NO_TITLE); this.getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN); Display currentDisplay = getWindowManager().getDefaultDisplay(); float dw = currentDisplay.getWidth(); float dh = currentDisplay.getHeight(); bitmap = Bitmap.createBitmap((int) dw, (int) dh,Bitmap.Config.ARGB_8888); canvas = new Canvas(bitmap); paint = new Paint(); paint.setColor(Color.BLACK); imageView = new ImageView(this); imageView.setImageBitmap(bitmap); imageView.setOnTouchListener(this); setContentView(imageView); } public boolean onTouch(View v, MotionEvent event) { int action = event.getAction(); switch (action) { case MotionEvent.ACTION_DOWN: bx = event.getX(); by = event.getY(); break; case MotionEvent.ACTION_MOVE: canvas.drawLine(bx, by, event.getX(), event.getY(), paint); imageView.invalidate(); bx = event.getX(); by = event.getY(); break; case MotionEvent.ACTION_UP: break; case MotionEvent.ACTION_CANCEL: break; default: break; } return true; } }

touch event in custom view (android)

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public class MainActivity extends Activity { @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); CustomView cv = new CustomView(this); cv.setBackgroundColor(Color.GRAY); setContentView(cv); } } class CustomView extends View { private Paint paint; private int positionX; private int positionY; private String l = ""; public CustomView(Context context) { super(context); paint = new Paint(); paint.setColor(Color.WHITE); paint.setTextSize(18); paint.setAntiAlias(true); } protected void onDraw(Canvas canvas) { // TODO Auto-generated method stub super.onDraw(canvas); canvas.drawText(l, 10, 100, paint); invalidate(); } public boolean onTouchEvent(MotionEvent event) { positionX = (int)event.getRawX(); positionY = (int)event.getRawY(); switch(event.getAction()) { case MotionEvent.ACTION_DOWN: l = "DOWN - " + String.valueOf(positionX) + " " + String.valueOf(positionY); break; case MotionEvent.ACTION_MOVE: l = "MOVE - " + String.valueOf(positionX) + " " + String.valueOf(positionY); break; case MotionEvent.ACTION_UP: l = "UP - " + String.valueOf(positionX) + " " + String.valueOf(positionY); break; } return true; } }

Relative Layout + custom view (android)

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public class MainActivity extends Activity { @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); CustomView v = new CustomView(this); RelativeLayout.LayoutParams lp = new RelativeLayout.LayoutParams(100,100); lp.addRule(RelativeLayout.ALIGN_PARENT_LEFT); //v.setLayoutParams(lp2); v.setBackgroundColor(Color.parseColor("#333333")); CustomView v2 = new CustomView(this); RelativeLayout.LayoutParams lp2 = new RelativeLayout.LayoutParams(100,100); lp2.addRule(RelativeLayout.ALIGN_PARENT_RIGHT); //v.setLayoutParams(lp2); v2.setBackgroundColor(Color.parseColor("#333333")); RelativeLayout relativeLayout = new RelativeLayout(this); RelativeLayout.LayoutParams _lp = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.FILL_PARENT,RelativeLayout.LayoutParams.FILL_PARENT); //relativeLayout.setLayoutParams(lp); relativeLayout.addView(v,lp); relativeLayout.addView(v2,lp2); setContentView(relativeLayout,_lp); } } class CustomView extends View { private Paint paint; public CustomView(Context context) { super(context); paint = new Paint(); paint.setColor(Color.WHITE); paint.setTextSize(18); paint.setAntiAlias(true); } protected void onDraw(Canvas canvas) { // TODO Auto-generated method stub super.onDraw(canvas); canvas.drawText("Hello World", 5, 30, paint); invalidate(); } }

view background color (android)

view.setBackgroundColor(Color.parseColor("#123456"));

Simple Image Processing - Grayscale (C#)

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/* * Created by SharpDevelop. * User: wai * Date: 2/9/2012 * Time: 21:09 * * To change this template use Tools | Options | Coding | Edit Standard Headers. / */ using System; using System.Collections.Generic; using System.Drawing; using System.Windows.Forms; using System.ComponentModel; namespace PictureBox_Test { /// <summary> /// Description of MainForm. /// </summary> public partial class MainForm : Form { PictureBox imageControl; public MainForm() { // // The InitializeComponent() call is required for Windows Forms designer support. // InitializeComponent(); this.Size = new Size(400,300); imageControl = new PictureBox(); imageControl.ImageLocation = "http://blog-imgs-31-origin.fc2.com/h/a/n/hanmans/pachinkotokyo18.jpg"; imageControl.InitialImage = null; imageControl.Width = 400; imageControl.Height = 300; this.Controls.Add(imageControl); imageControl.LoadCompleted += PictureBox1_LoadCompleted; } private void PictureBox1_LoadCompleted(Object sender, AsyncCompletedEventArgs e) { Bitmap image = new Bitmap(imageControl.Image); imageControl.Image = SetGrayscale(image); } public Bitmap SetGrayscale(Bitmap image) { Bitmap bmap = image; Color c; for (int i = 0; i < bmap.Width; i++) { for (int j = 0; j < bmap.Height; j++) { c = bmap.GetPixel(i, j); byte gray = (byte)(.299 * c.R + .587 * c.G + .114 * c.B); bmap.SetPixel(i, j, Color.FromArgb(gray, gray, gray)); } } return bmap; } } }

PictureBox load image from url (C#)

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/* * Created by SharpDevelop. * User: wai * Date: 2/9/2012 * Time: 21:09 * * To change this template use Tools | Options | Coding | Edit Standard Headers. / */ using System; using System.Collections.Generic; using System.Drawing; using System.Windows.Forms; namespace PictureBox_Test { /// <summary> /// Description of MainForm. /// </summary> public partial class MainForm : Form { public MainForm() { // // The InitializeComponent() call is required for Windows Forms designer support. // InitializeComponent(); this.Size = new Size(400,300); PictureBox imageControl = new PictureBox(); imageControl.ImageLocation = "http://blog-imgs-31-origin.fc2.com/h/a/n/hanmans/pachinkotokyo18.jpg"; imageControl.Width = 400; imageControl.Height = 300; this.Controls.Add(imageControl); } } }