在布局方面支持不同的屏幕尺寸和密度

Question

I would like to know how to make my app support different screen sizes and densities, including tablets, regarding the layout. I've found different answers on SO, but I can't find one that explains this issue the best.

I've already included this in my Manifest:

<supports-screens
    android:anyDensity="true"
    android:largeScreens="true"
    android:normalScreens="true"
    android:smallScreens="true"
    android:xlargeScreens="true" />

According to this answer, I should create multiple layout folders such as small, large, xlarge.

According to documentation I should create multiple layouts and use size qualifiers such as sw<N>dp .

Which would be the best solution if my app needs to support both phones and tablts?

Additional question: In connection with the abovementioned question, I have a recycler view with list of items. If the screen is portrait then there's a list, if the screen is landscape, then there's grid.

if (getResources().getConfiguration().orientation == Configuration.ORIENTATION_PORTRAIT) {
        LinearLayoutManager manager = new LinearLayoutManager(getContext());
        mBinder.rvHistoryList.setLayoutManager(manager);
    } else if (getResources().getConfiguration().orientation == Configuration.ORIENTATION_LANDSCAPE) {
        GridLayoutManager manager = new GridLayoutManager(getContext(), 2);
        mBinder.rvHistoryList.setLayoutManager(manager);
    }

But, if the app is used on a tablet in portrait mode I would like the items to be in a grid ordered by 2 in a row, if the app is used on a tablet in landscape mode I would like the items to be in a grid ordered by 4 in a row. How can I achieve this?

Answer 1

Creating few layouts for different size is old and confusing method.
You can set weight for each layout and component.

This is good tutorial for beginning.

http://www.101apps.co.za/index.php/articles/using-android-s-layout-weight-attribute.html