获取绘制在运行时不同的屏幕密度 [英] Get drawable for different screen density at runtime

问题描述

我想在运行时打印所有可绘制的大小。所以，如果我在华电国际设备，然后我可以打印的华电国际可绘制但如何可以访问，让大小说 MDPI 和 xhdpi 呢？我可以得到以下code访问所有可绘制资源ID：

 最后一类与LT; R.drawable＆GT; C = R.drawable.class;
最后一个字段[]栏= c.getDeclaredFields（）;的for（int i = 0，最大值= fields.length; I＆LT;最大;我++）{
    最终诠释RESOURCEID;
    尝试{
        RESOURCEID =域[I] .getInt（drawableResources）;
    }赶上（例外五）{
        继续;
    }
    / *利用RESOURCEID对这里访问可绘制* /
}
 

解决方案

好吧，我发现了，基本上你明确要求这样一个特定的密度绘制：

 可绘制可绘制= resources.getDrawableForDensity（ID，DisplayMetrics.DENSITY_XHIGH）;
 

或preferably这个版本的

 可绘制可绘制= resources.getDrawableForDensity（ID，DisplayMetrics.DENSITY_XHIGH，主题）;
 

I want to print sizes of all drawables at run-time. So if I am on hdpi device then I can print the size of hdpi drawables but how to get access to, lets say mdpi and xhdpi as well? I can get access to all drawables resource ids with following code:

final Class<R.drawable> c = R.drawable.class;
final Field[] fields = c.getDeclaredFields();

for (int i = 0, max = fields.length; i < max; i++) {
    final int resourceId;
    try {
        resourceId = fields[i].getInt(drawableResources);
    } catch (Exception e) {
        continue;
    }
    /* make use of resourceId for accessing Drawables here */
}

解决方案

Ok I found it, Basically you explicitly ask for a particular density drawable like this:

Drawable drawable = resources.getDrawableForDensity(id, DisplayMetrics.DENSITY_XHIGH);

or preferably this version

Drawable drawable = resources.getDrawableForDensity(id, DisplayMetrics.DENSITY_XHIGH, theme);

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