First of all, thanks in advance for any help you can provide. This has been driving me nuts and google's been no friend of mine for this.
I've created a DrawView so the user can paint something in the app. What I'd like to do is place that DrawView within a layout XML file, so I can place a TextView title on the top and two buttons on the bottom, one of which will save what the user painted as an image file. So far, all I've been able to do is create an area for the user to paint in. Is there any way to place this DrawView view into an XML file? If not, what alternative solutions do I have?
Also, this is an optional question as I'm sure I'll find the solution by googling, at some point, but is there a better way to smoothly draw along the user's finger movement, other than the canvas.drawLine() method I am currently using?
public class Draw extends Activity {
DrawView drawView;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// Set full screen view
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
WindowManager.LayoutParams.FLAG_FULLSCREEN);
requestWindowFeature(Window.FEATURE_NO_TITLE);
drawView = new DrawView(this);
setContentView(drawView);
drawView.requestFocus();
}
}
public class DrawView extends View implements OnTouchListener {
private static final String TAG = "DrawView";
ArrayList <Float> nikpointx = new ArrayList<Float>();
ArrayList <Float> nikpointy = new ArrayList<Float>();
Bitmap nikbmp;
Paint paint = new Paint();
public DrawView(Context context) {
super(context);
setFocusable(true);
setFocusableInTouchMode(true);
this.setOnTouchListener(this);
paint.setColor(Color.WHITE);
paint.setAntiAlias(true);
paint.setStrokeWidth(4);
}
@Override
public void onDraw(Canvas canvas) {
//I'm doing this, because the drawCircle method places circles at different points
//in the screen, rather than drawing smooth lines. I haven't found a more elegant
//solution yet :-(
canvas.drawLine(nikpointx.get(i-1), nikpointy.get(i-1), nikpointx.get(i), nikpointy.get(i), paint);
canvas.setBitmap(nikbmp);
}
}
public boolean onTouch(View view, MotionEvent event) {
// if(event.getAction() != MotionEvent.ACTION_DOWN)
// return super.onTouchEvent(event);
Point point = new Point();
point.x = event.getX();
point.y = event.getY();
points.add(point);
invalidate();
Log.d(TAG, "point: " + point);
nikpointx.add(event.getX());
nikpointy.add(event.getY());
return true;
}
}
