Apps How to create button Programatically?

[thangaraj]

public class SamActivity extends Activity
{
private Paint mPaint;
private MaskFilter mEmboss;
private MaskFilter mBlur;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);



fg();


}




public class MyView extends ImageView {



private Bitmap mBitmap;
private Canvas mCanvas;
private Path mPath;
private Paint mBitmapPaint;

public MyView(Context c) {
super(c);

mPath = new Path();
mBitmapPaint = new Paint(Paint.DITHER_FLAG);

}

@Override
protected void onSizeChanged(int w, int h, int oldw, int oldh) {
super.onSizeChanged(w, h, oldw, oldh);
mBitmap = Bitmap.createBitmap(w, h, Bitmap.Config.ARGB_8888);
mCanvas = new Canvas(mBitmap);
}

@Override
protected void onDraw(Canvas canvas)
{
mPaint = new Paint();
mPaint.setAntiAlias(true);
mPaint.setDither(true);

mPaint.setStyle(Paint.Style.STROKE);
mPaint.setStrokeJoin(Paint.Join.ROUND);
mPaint.setStrokeCap(Paint.Cap.ROUND);
mPaint.setStrokeWidth(12);
mPaint.setColor(Color.RED);
mEmboss = new EmbossMaskFilter(new float[] { 1, 1, 1 },
0.4f, 6, 3.5f);

mBlur = new BlurMaskFilter(8, BlurMaskFilter.Blur.NORMAL);

Bitmap mBitmap1= BitmapFactory.decodeResource(getResources(), R.drawable.base);

Bitmap bMapScaled = Bitmap.createScaledBitmap(mBitmap1, 10, 10, true);
canvas.drawBitmap(bMapScaled, 0,0, mPaint);
canvas.drawBitmap(mBitmap, 0, 0, mBitmapPaint);
canvas.drawPath(mPath, mPaint);
super.onDraw(canvas);
invalidate();
}

private float mX, mY;
private static final float TOUCH_TOLERANCE = 4;

private void touch_start(float x, float y)
{

mPath.reset();
mPath.moveTo(x, y);
mX = x;
mY = y;
}
private void touch_move(float x, float y) {
float dx = Math.abs(x - mX);
float dy = Math.abs(y - mY);
if (dx >= TOUCH_TOLERANCE || dy >= TOUCH_TOLERANCE) {
mPath.quadTo(mX, mY, (x + mX)/2, (y + mY)/2);
mX = x;
mY = y;
}
}
private void touch_up() {
mPath.lineTo(mX, mY);
// commit the path to our offscreen
mCanvas.drawPath(mPath, mPaint);
// kill this so we don't double draw
mPath.reset();
}

@Override
public boolean onTouchEvent(MotionEvent event)
{


float x = event.getX();
float y = event.getY();

switch (event.getAction()) {
case MotionEvent.ACTION_DOWN:
touch_start(x, y);
invalidate();
break;
case MotionEvent.ACTION_MOVE:
touch_move(x, y);
invalidate();
break;
case MotionEvent.ACTION_UP:
touch_up();
invalidate();
break;
}
return true;
}


}
public void fg()
{

MyView mp = new MyView(this);
setContentView(mp);

}

}
This is my code.In this i draw a line over the image.Now i want to know how to create button programatically?please help me.

 

[lugopaco]

You have to add it to your layout and then declare it and program it in this code. In the layout file just add:

<Button  android:layout_height="wrap_content" 
         android:id="@+id/boton" android:text="fin" 
         android:layout_width="match_parent" ></Button>

and in your program you have to modify:

public class SamActivity extends Activity implements  OnClickListener{
 
 //you have to add:
 private Button boton;
 
 //and in the OnCreate method:
 boton = (Button) findViewById(R.id.boton);
 
 //then you have to add the onclick method:
 
 @Override
                 public void onClick(View v) {
                     // TODO Auto-generated method stub.
                      if(v==boton) {
   // Do what ever you want here
                         
                      }
                      
                      
                      
                 }

Hope I could help =)