我想要做的是,从按钮边缘到屏幕上的一点画一条线……
我正在使用一个对话框片段…我尝试的所有函数总是返回0点…
我试过以下：
@Override
protected Dialog createDialog(Bundle savedInstanceState, FragmentActivity activity)
{
Dialog d = builder.create();
View v = LayoutInflater.from(activity).inflate(R.layout.dialog, null);
builder.setView(v);
// custom view by my which draws simple lines between points...
LineDrawView ldv = new LineDrawView(getActivity());
ldv.setLayoutParams(new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT));
((RelativeLayout)v).addView(ldv);
Dialog d = builder.create();
button = ((Button) v.findViewById(R.id.button));
int[] pos = new int[2];
button.getLocationInWindow(pos);
// tried following ways, all always return p(0, 0)
// button.getLocationInWindow(pos);
// Debugger.d("x: " + pos[0] + ", y: " + pos[1], "POS");
// button.getLocationOnScreen(pos);
// Debugger.d("x: " + pos[0] + ", y: " + pos[1], "POS");
// float x = button.getLeft();
// float y = button.getTop();
// Debugger.d("x: " + x + ", y: " + y, "POS");
ldv.addLine(new Point(pos[0], pos[1]), new Point(pos[0] + 30, pos[1]), Color.RED);
ldv.invalidate();
return d;
}
并且它总是从p(0,0)到p(0,30)绘制一条线……
如何获得屏幕上按钮的位置或相对于父视图的优先级？我认为,他们的布局尚未完成,所以我必须稍后在某处画出我的线条,但是时间和地点？
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