如何在所有设备上看起来相同的边距处放置视图? [英] How to position the view with margin that will look same for all devices?

问题描述

我正在尝试通过以编程方式添加130(顶部)来将视图放置在中央，以使其看起来不错，但是，我不确定如何使其他Android设备(例如平板电脑)看起来一样吗?在普通Android手机上将130添加到页边距顶部看起来不错，但在平板电脑上看起来会有所不同.我将如何制定逻辑以提供在所有设备上都具有相同外观的页边空白?一些例子或技巧会很棒！我希望收到您的来信！

I'm trying to position a view in the center to make it look good by adding 130 (margin-top) programmatically, however, I'm not sure how to give other android devices such as tablets to look the same? adding 130 to the margin-top looks good on the normal android phone but will look different on a tablet. How will I able to make a logic to give a margin-top that will provide the same look on all devices? Some examples or tip would be great! I would love to hear from you!

margin_top = 130 // How to make this look good on all devices? 

ViewGroup.MarginLayoutParams p = (ViewGroup.MarginLayoutParams) v.getLayoutParams();
p.setMargins(0, margin_top, 0, 0);
v.requestLayout();

推荐答案

我的解决方法如下:

1).获取设备高度.还要检查此答案.

1). Get the device height. Also check this answer.

DisplayMetrics displayMetrics = new DisplayMetrics();
getWindowManager().getDefaultDisplay().getMetrics(displayMetrics);
int height = displayMetrics.heightPixels;

2).计算比率.

我假设您已将最高边距设置为130dp.使用像素清晰度，我设法将其转换为px.

You have set a top margin of 130dp I assume. Using pixplicity I managed to convert it to px.

您的手机的分辨率高度为 x ，以像素为单位.让我们将高度定义为phoneHeight.

Your phone has a resolution height x weight in pixels. Let's define height as phoneHeight.

这对我来说也变得有些棘手.如您所见，130dp对于ldpi，mdpi等具有不同的像素值.我个人不知道应该使用哪一种，您可以尝试使用mdpi. (我将尝试进行更多研究，然后再给出答案).

Here it becomes a little tricky for me too. As you can see 130dp has different pixel values for ldpi, mdpi, etc. I personally don't know which one you should use, you might try the mdpi one. (I'll try to research more and come back with an answer).

LE:

您可以使用此方法根据手机将dp转换为像素. (请参见此答案).

You can use this method to convert dp to pixels according to your phone. (See this answer).

public static float convertDpToPixel(float dp, Context context){
    Resources resources = context.getResources();
    DisplayMetrics metrics = resources.getDisplayMetrics();
    float px = dp * ((float)metrics.densityDpi / DisplayMetrics.DENSITY_DEFAULT);
    return px;
}

将返回的px用于以下公式. (我们将返回的px称为convertedPx.

Use the returned px into the formula below. (let's call the returned px - convertedPx.

3).上边距值的公式.

如果从表中将130dp的值用于mdpi，则得到130px.因此公式为:

If we use the value of 130dp for mdpi from the table we get 130px. So the formula would be:

margin_top = (convertedPx / phoneHeight) * height

margin_top = (convertedPx / phoneHeight) * height

具有phoneHeight当前正在测试的手机的高度，以及height使用displayMetrics的设备的高度.

with phoneHeight the height of the phone you are currently testing on and height the height of the device using displayMetrics.

注意: convertedPx将是一个常量.您只需在手机上运行此方法(convertDpToPixel)即可找出130dp的像素平均值.

NOTICE: convertedPx will be a constant. You only have to run this method (convertDpToPixel) on your phone to find out how much 130dp mean in pixels.

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