我正在尝试在这里制作绘画笔应用程序我能够通过触摸手指绘制..但我想要的是用户可以选择不同的颜色并绘制它。可以任何人帮我这个吗?
public class MyTouchEventView extends View {
private Paint paint = new Paint();
private Path path = new Path();
private Paint circlePaint = new Paint();
private Path circlePath = new Path();
public Button btnReset;
public LayoutParams params;
private Spinner sp;
public MyTouchEventView(Context context) {
super(context);
paint.setAntiAlias(true);
paint.setColor(Color.GREEN);
paint.setStyle(Paint.Style.STROKE);
paint.setStrokeJoin(Paint.Join.ROUND);
paint.setStrokeWidth(15f);
circlePaint.setAntiAlias(true);
circlePaint.setColor(Color.BLUE);
circlePaint.setStyle(Paint.Style.STROKE);
circlePaint.setStrokeJoin(Paint.Join.MITER);
circlePaint.setStrokeWidth(4f);
sp=new Spinner(context);
btnReset = new Button(context);
btnReset.setText("Clear Screen");
params = new LayoutParams(LayoutParams.MATCH_PARENT,
LayoutParams.WRAP_CONTENT);
btnReset.setLayoutParams(params);
btnReset.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
// TODO Auto-generated method stub
// resets the screen
path.reset();
// Calls the onDraw() method
postInvalidate();
}
});
}
@Override
protected void onDraw(Canvas canvas) {
canvas.drawPath(path, paint);
canvas.drawPath(circlePath, circlePaint);
}
@Override
public boolean onTouchEvent(MotionEvent event) {
float pointX = event.getX();
float pointY = event.getY();
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN:
path.moveTo(pointX, pointY);
return true;
case MotionEvent.ACTION_MOVE:
path.lineTo(pointX, pointY);
circlePath.reset();
circlePath.addCircle(pointX, pointY, 30, Path.Direction.CW);
break;
case MotionEvent.ACTION_UP:
circlePath.reset();
break;
default:
return false;
}
// Schedules a repaint.
// Force a view to draw.
postInvalidate();
return true;
}
}
DrawingBrush.java
public class DrawingBrush extends Activity {
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
MyTouchEventView tv = new MyTouchEventView(this);
setContentView(tv);
addContentView(tv.btnReset, tv.params);
}
@Override
protected void onPause() {
// TODO Auto-generated method stub
super.onPause();
finish();
}
}