Android：为不同的设备/屏幕尺寸设置不同尺寸的神秘技巧

Question

My first Android App. And, am trying to get this sorted -> setting different text sizes, layout sizes for different screen / device sizes. Now, I Googl'ed a lot , then read several Stackoverflow threads, & am doing this: Created different folders under 'res' like values-ldpi values-mdpi values-hdpi values-xhdpi values-xxhdpi values-xxxhdpi

Then I put a dimens.xml & styles.xml in each folder above.

Phew! But this doesn't suffice. I want to have different textsizes (and other dimensions, am not speaking about images here) for phones & different ones for tablets. I know there are these 'values-sw600dp, and 'values-sw720dp' which they say is aimed at tablets. But even within each tablet size, I need to differentiate the different densities right? For example, within 'values-sw600dp', I need to have different textsizes for, say, hdpi, xhdpi, ... How do I do this? Any help please?

Here is an example of what am doing:

    TextView textView = (TextView) findViewById(R.id.text_interference);
    textView.setHeight(layoutHt);
    textView.setWidth((layoutWd-20)/2);
    int dimensControlButtonTextSize = getResources().getInteger(R.integer.CONTROL_BUTTON_TEXT_SIZE);
    textView.setTextSize(dimensControlButtonTextSize);

Then in dimens.xml, it would be: 17

This value, ie 17 here, will differ in each device ie it is given a different value in each dimens.xml under each values- folder. I hope am clear.

Answer 1

Drawable resources do not need to be duplicated per screen configuration, except for special cases like you have a full screen splash that would be displayed differently for landscape and portrait. Normally for icons, specifying once in the main resources folder (under hdpi, mdpi, xhdpi, xxhdpi...) should be sufficient.

I would find screen configuration specific resources to be useful for dimen values, like padding, margin, width of items, etc...