如果其他所有因素都失败,则按预期使用<条码>的宽度和高度。

http://www.ohchr.org。

仅凭本人的尝试,加上这一法典,使之发挥作用。

    // -2 means WRAP_CONTENT THIS TRIGGERS THE PROBLEM
    popup = new PopupWindow(getPopupContent(), 200, 100);
    popup.setWindowLayoutMode(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT);
    // When you specify the dimensions everything goes fine
    //popup = new PopupWindow(getPopupContent(), 200, 100);

    LinearLayout layout = new LinearLayout(this);
    layout.setOrientation(LinearLayout.VERTICAL);

我离开了那里原来的评论,以便你能够看到一切应该到哪里去。

Edit 2: Okay, so I took your code you posted and verbatim tried it on my device, and you were right, it didn t work because when Android is determining which views to layout to put it in, it relies on the width and height you provided. What that means is since you are using 0 and 0 as your width and height, Android will come along and say, "Oh look, the box is only a 0 by 0 box so I can display it as a popup below the content." This isn t what is desired though! The thing is, you know that the box is going to be bigger than that, so lets start putting in some different numbers and seeing the results that come from it.

popup = new PopupWindow(getPopupContent(), 1, 1);

Now when I go and click the bottom box, notice that it jumps above. (See screenshot) That s because Android KNOWS that the width and height are 1 (as I set in the constructor) and that the available screen space below the list item is 0. Well, if there s not enough room to display it there, then it must above then!

但等待! 如果像我的目前例子一样,插图每次会增加内容? 情况确实令人感兴趣。 你在我的下一次屏幕上看到,尽管由于距离现在长6条线,人口仍然充斥在底层! Oh crap, right! 这是因为它是根据<代码>1测量的。 我在建筑商中使用。 当时有什么解决办法?

Solution One: My preferred way would be to take a guess at what the average max height of the TextView would be and then simply toss in one generically big number.

popup = new PopupWindow(getPopupContent(), 300, 300); //just guessing it won t get bigger than that

解决办法二: 这更合适,但你却花了一点速度。 采用<代码>Paint的类别,在显示人口之前,测量案文内容大小,并将之并入<代码>setWidth(和setHala(<>。 我走过前面,并建造了一个 几乎<>-em>的完全解决办法,但我在dding子和 st子方面却采取了一定措施(见评论)。

private int maxWidth;
private int maxHeight;
private Paint p = new Paint();
private Rect bounds = new Rect();
private View getPopupContent() {
    maxWidth = 0;
    maxHeight = 0;
    TextView popupContent = new TextView(this);
    popupContent.setText(popupText += "
" + DEMO);
    popupContent.setTextColor(Color.parseColor("#5000ae"));
    popupContent.setBackgroundColor(Color.parseColor("#ff00ff"));
    popupContent.setPadding(10, 20, 20, 10);
    //the measure can only work line by line so I split it up by line
    String[] temp = popupText.split("
");
    for (String s : temp){
        //measure each line of string and get its width and height
        p.getTextBounds(s, 0, s.length(), bounds);

        //keep a running total of the longest width
        maxWidth = (bounds.width() > maxWidth) ? bounds.width() : maxWidth;
        //add up each of the heights
        maxHeight += bounds.height();
    }

    //also take in account the padding too... if you REALLY want it to be completely robust
    //probably adding another 20 or 30 to the maxHeight should be good
    return popupContent;
}

之后在<代码>onClick()中。 我增加了这两条。

    popup.setHeight(maxHeight);
    popup.setWidth(maxWidth);