Question

我正在使用自定义surfaceview。但绘制不出现，视图是全黑的：

public class SV extends SurfaceView {

    Context context;

    public SV (Context a_context)
    {
        super(a_context);
        context = a_context;
    }

    @Override
    public void draw (Canvas c)
    {
        c.drawColor(0xFFFF0000);
        Paint p = new Paint();
        p.setColor(0xFFFFFFFF);
        c.drawCircle(c.getWidth()/2, c.getHeight()/2, 150, p);
    }

    @Override
    public void onDraw (Canvas c)
    {
        c.drawColor(0xFF0088FF);
    }

}

并在onCreate活动中：

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

    SV sv = new SV (this);
    setContentView(sv);
}

Answer 1

将setWillNotDraw(false)语句添加到来自surfaceCreated()的{{1}}方法中。因此，您需要在SurfaceHolder.Callback。

中添加以下代码

Activity

自定义SurfaceView：不显示绘制

1 个答案: