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我想绘制android.But线，但我不满足，因为它不绘制完整线，它绘制一条虚线，当我快速移动对象，并绘制完整的线时我谨对象slowly.Plaese帮我为什么这个happenes.I只想完整产品线不虚line.My代码是在这里： 上的观点触摸事件：使用drawPoint（）的绘制线
public boolean onTouch(View view, MotionEvent event) {
// TODO Auto-generated method stub
final int X = (int) event.getRawX();
final int Y = (int) event.getRawY();
switch (event.getAction() & MotionEvent.ACTION_MASK) {
case MotionEvent.ACTION_DOWN:
RelativeLayout.LayoutParams lParams = (RelativeLayout.LayoutParams) view
.getLayoutParams();
_xDelta = X - lParams.leftMargin;
Log.e("ACTION DOWN X", "" + Y + "---" + lParams.leftMargin);
_yDelta = Y - lParams.topMargin;
Log.e("ACTION DOWN Y", "" + Y + "---" + lParams.leftMargin);
break;
case MotionEvent.ACTION_UP:
break;
case MotionEvent.ACTION_POINTER_DOWN:
break;
case MotionEvent.ACTION_POINTER_UP:
break;
case MotionEvent.ACTION_MOVE:
RelativeLayout.LayoutParams layoutParams = (RelativeLayout.LayoutParams) view
.getLayoutParams();
layoutParams.leftMargin = X - _xDelta;
Log.e("ACTION Move left margin", "" + (X - _xDelta));
layoutParams.topMargin = Y - _yDelta;
Log.e("ACTION Move top margin", "" + (Y - _yDelta));
layoutParams.rightMargin = -250;
layoutParams.bottomMargin = -250;
view.setBackgroundColor(random.nextInt());
view.setLayoutParams(layoutParams);
draw = new DrawLine(MainActivity.this, X - _xDelta, Y - _yDelta);
root.addView(draw);
break;
}
root.invalidate();
return true;
}
而我的画法是这样的：
@Override
protected void onDraw(final Canvas canvas) {
// TODO Auto-generated method stub
super.onDraw(canvas);
// paint.setColor(random.nextInt());
paint.setStyle(Style.STROKE);
paint.setStrokeWidth(4);
canvas.drawPoint(startX, startY, paint);
}
而且我也想知道如何清除所有绘图。
请帮我解决这个问题。 谢谢。