Different Resolution Support Android

Compatibility with different resolutions/inches

You can replace your fixed size (what you are currently giving to your views) with something more responsive.

If this was your non responsive button:

<Button
android:layout_width="200dp"
android:layout_height="400dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />

Just replace it with this:

<Button
    android:layout_width="0dp"
    android:layout_height="0dp"
    app:layout_constraintWidth_percent="0.3"
    app:layout_constraintHeight_percent="0.5"
    app:layout_constraintBottom_toBottomOf="parent"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintTop_toTopOf="parent" />

For every phone, small or large this button will adjust according to the screen size and will take 30% of the screen width and 50% of the screen Width.
This is how you can make one screen responsive to all screen sizes and not create a lot of layouts for different screens.

How to set android layout to support all screen sizes?

Please go through the following links. These might help you:

Supporting Different Screen Sizes

Supporting Multiple Screens

Supporting Different Densities

Supporting Tablets and Handsets

AFAIK, the only way to support all screens is by doing that folder bifurcation. Every XML file goes up to a few kilo bytes. So, size shouldn't be too much of an issue as such.

How to support all the different resolutions of android products

You don't have to do that to support different densities. What you do is create different resources folders:

res/values-ldpi/dimens.xml
res/values-mdpi/dimens.xml
res/values-hdpi/dimens.xml

Then Android will decide which file to use. You can have something like:

<!-- in values-ldpi/dimens.xml -->
<dimen name="textSize">25dip</dimen>

and..

<!-- in values-mdpi/dimens.xml -->
<dimen name="textSize">20dip</dimen>

etc. And you shouldn't care about resolution... there are a lot of different resolutions sizes so it would be a hell to take decisions based on that.

Also, if you use dp instead of pixels, you hardly ever will have to create different dimensions files for each density. Of course, sometimes you have to, but it depends on the app.

How to support different screen size in android

For Different screen size, The following is a list of resource directories in an application that provides different layout designs for different screen sizes and different bitmap drawables for small, medium, high, and extra high density screens.

res/layout/my_layout.xml             // layout for normal screen size ("default")
res/layout-small/my_layout.xml       // layout for small screen size
res/layout-large/my_layout.xml       // layout for large screen size
res/layout-xlarge/my_layout.xml      // layout for extra large screen size
res/layout-xlarge-land/my_layout.xml // layout for extra large in landscape orientation

res/drawable-mdpi/my_icon.png        // bitmap for medium density
res/drawable-hdpi/my_icon.png        // bitmap for high density
res/drawable-xhdpi/my_icon.png       // bitmap for extra high density

The following code in the Manifest supports all dpis.

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

And also check out my SO answer.

Android screen in different resolutions

Yes, this can be confusing.
However, different devices have different amounts of 'DP's. The purpose of this is so that larger screens can hold more content. If you're using images, you can provide different sizes for different screen densities.

For more info, see this page: http://developer.android.com/guide/practices/screens_support.html

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