对话框getWidth和getHeight不管什么都不返回整数

我已经实现了我可以在StackOverflow上找到的所有内容。这是我的代码：

主要活动：

        statusDialog.getWindow().setAttributes(lp);
        statusDialog.show();
        final LinearLayout drawbar = (LinearLayout) statusDialog.findViewById(R.id.drawbar);
        int barWidth = drawbar.getWidth();
        int barHeight = drawbar.getHeight();
        DrawBar(drawbar);
}   

public void DrawBar(View v){
        LinearLayout statusDialog = (LinearLayout) v;
        Paint paint = new Paint();
        paint.setColor(Color.parseColor("#CD5C5C"));
        Bitmap bg = Bitmap.createBitmap(480, 800, Bitmap.Config.ARGB_8888);
        Canvas canvas = new Canvas(bg);
        View bar = statusDialog.findViewById(R.id.drawbar);
        LinearLayout test = (LinearLayout) statusDialog.findViewById(R.id.drawbar);
        int barWidth2 = statusDialog.getLayoutParams().width;
        int barHeight2 = statusDialog.getLayoutParams().height;
        int barWidth3 = v.getLayoutParams().width;
        int barHeight3 = v.getLayoutParams().height;
        int barWidth4 = bar.getLayoutParams().width;
        int barHeight4 = bar.getLayoutParams().height;
        int barWidth5 = v.getMeasuredWidth();
        int barHeight5 = v.getMeasuredHeight();
        int barWidth6 = statusDialog.getWidth();
        int barHeight6 = statusDialog.getHeight();
        test.measure(
                View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED),
                View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED))
        int barheight7 = test.getMeasuredHeight();
        int barwidth7 = test.getMeasuredWidth();
        canvas.drawRect(0, 0, 50, 50, paint);
        //canvas.drawRect(0, 0, barWidth, barHeight, paint);
        statusDialog.setBackgroundDrawable(new BitmapDrawable(this.getResources(), bg));
    }

drawbar.xml：

<LinearLayout
    android:id="@+id/drawbar"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical">
</LinearLayout>

statusDialog.show函数可以正常工作，并显示应显示的对话框。我正在尝试在屏幕上绘制一条条，以在将布局绘制到屏幕后在此处指定的布局中水平填充内容。如果我将布局高度硬编码为[N] dp，我将获得一个像素计数，但是否则其他所有内容只会返回-1，而我无法使用来动态填充最后注释的行canvas.drawRect(0, 0, barWidth, barHeight, paint);。

我不知道我在做什么错。帮忙。