我想我遇到了一个讨厌的错误。问题是几乎水平的线
带有轻微的渐变并使用 StrokeWidth = 1 的 Paint 则不是
绘制,例如:
public class MyControl extends View {
public MyControl(Context context) {
super(context);
// TODO Auto-generated constructor stub
}
@Override
protected void onDraw(Canvas canvas)
{
super.onDraw(canvas);
Paint pen = new Paint();
pen.setColor(Color.RED);
pen.setStrokeWidth(1);
pen.setStyle(Paint.Style.STROKE);
canvas.drawLine(100, 100, 200, 90, pen); //not painted
canvas.drawLine(100, 100, 200, 100, pen);
canvas.drawLine(100, 100, 200, 110, pen); //not painted
canvas.drawLine(100, 100, 200, 120, pen); //not painted
canvas.drawLine(100, 100, 200, 130, pen);
pen.Color = Color.MAGENTA;
pen.setStrokeWidth(2);
canvas.drawLine(100, 200, 200, 190, pen);
canvas.drawLine(100, 200, 200, 200, pen);
canvas.drawLine(100, 200, 200, 210, pen);
canvas.drawLine(100, 200, 200, 220, pen);
canvas.drawLine(100, 200, 200, 230, pen);
}
}
并以这种方式使用 MyControl 类:
public class prova extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
MyControl ctrl = new MyControl(this);
setContentView(ctrl);
}
}
将 StrokeWidth 设置为 0 或 > 1 将绘制所有线条。
任何人都可以对此有所了解吗?或者我应该将此问题作为安卓问题 http://code.google.com/p/android/issues/list?
提前致谢!