CardView Demo in Android L

Here is a simple CardView Demo in Android.

This demo shows how you can apply Corner radius and Shadow in Android L.

Here is the Activity.

package com.example.android.cardview;

import android.app.Activity;
import android.os.Bundle;

/**
 * Launcher Activity for the CardView sample app.
 */
public class CardViewActivity extends Activity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_card_view);
        if (savedInstanceState == null) {
            getFragmentManager().beginTransaction()
                    .add(R.id.container, CardViewFragment.newInstance())
                    .commit();
        }
    }
}

This is the Fragment that adds the CardView.

package com.example.android.cardview;

import android.app.Fragment;
import android.os.Bundle;
import android.support.v7.widget.CardView;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.SeekBar;

/**
 * Fragment that demonstrates how to use CardView.
 */
public class CardViewFragment extends Fragment {

    private static final String TAG = CardViewFragment.class.getSimpleName();

    /** The CardView widget. */
    //@VisibleForTesting
    CardView mCardView;

    /**
     * SeekBar that changes the cornerRadius attribute for the {@link #mCardView} widget.
     */
    //@VisibleForTesting
    SeekBar mRadiusSeekBar;

    /**
     * SeekBar that changes the Elevation attribute for the {@link #mCardView} widget.
     */
    //@VisibleForTesting
    SeekBar mElevationSeekBar;

    /**
     * Use this factory method to create a new instance of
     * this fragment using the provided parameters.
     *
     * @return A new instance of fragment NotificationFragment.
     */
    public static CardViewFragment newInstance() {
        CardViewFragment fragment = new CardViewFragment();
        fragment.setRetainInstance(true);
        return fragment;
    }

    public CardViewFragment() {
        // Required empty public constructor
    }

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        // Inflate the layout for this fragment
        return inflater.inflate(R.layout.fragment_card_view, container, false);
    }

    @Override
    public void onViewCreated(View view, Bundle savedInstanceState) {
        super.onViewCreated(view, savedInstanceState);
        mCardView = (CardView) view.findViewById(R.id.cardview);
        mRadiusSeekBar = (SeekBar) view.findViewById(R.id.cardview_radius_seekbar);
        mRadiusSeekBar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
            @Override
            public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
                Log.d(TAG, String.format("SeekBar Radius progress : %d", progress));
                mCardView.setRadius(progress);
            }
            @Override
            public void onStartTrackingTouch(SeekBar seekBar) {
                //Do nothing
            }

            @Override
            public void onStopTrackingTouch(SeekBar seekBar) {
                //Do nothing
            }
        });

        mElevationSeekBar = (SeekBar) view.findViewById(R.id.cardview_elevation_seekbar);
        mElevationSeekBar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
            @Override
            public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
                Log.d(TAG, String.format("SeekBar Elevation progress : %d", progress));
                mCardView.setElevation(progress);
            }
            @Override
            public void onStartTrackingTouch(SeekBar seekBar) {
                //Do nothing
            }

            @Override
            public void onStopTrackingTouch(SeekBar seekBar) {
                //Do nothing
            }
        });
    }
}

The Layout for the Activity.

<scrollview xmlns:android="http://schemas.android.com/apk/res/android" xmlns:card_view="http://schemas.android.com/apk/res-auto" android:layout_width="match_parent" android:layout_height="match_parent">

    <linearlayout android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" android:paddingBottom="@dimen/activity_vertical_margin" android:paddingLeft="@dimen/activity_horizontal_margin" android:paddingRight="@dimen/activity_horizontal_margin" android:paddingTop="@dimen/activity_vertical_margin">

        <android .support.v7.widget.CardView android:id="@+id/cardview" android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_marginLeft="@dimen/margin_large" android:layout_marginRight="@dimen/margin_large" android:elevation="100dp" card_view:cardBackgroundColor="@color/cardview_initial_background" card_view:cardCornerRadius="8dp">

            <textview android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_margin="@dimen/margin_medium" android:text="@string/cardview_contents"></textview>
        </android>

        </linearlayout><linearlayout android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_marginTop="@dimen/margin_large" android:orientation="horizontal">

            <textview android:layout_width="@dimen/seekbar_label_length" android:layout_height="wrap_content" android:layout_gravity="center_vertical" android:text="@string/cardview_radius_seekbar_text"></textview>

            <seekbar android:id="@+id/cardview_radius_seekbar" android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_margin="@dimen/margin_medium"></seekbar>
        </linearlayout>

        <linearlayout android:layout_width="fill_parent" android:layout_height="wrap_content" android:orientation="horizontal">

            <textview android:layout_width="@dimen/seekbar_label_length" android:layout_height="wrap_content" android:layout_gravity="center_vertical" android:text="@string/cardview_elevation_seekbar_text"></textview>

            <seekbar android:id="@+id/cardview_elevation_seekbar" android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_margin="@dimen/margin_medium"></seekbar>
        </linearlayout>
    
</scrollview>

Fragment for placing CardView.

<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:id="@+id/container" android:layout_width="match_parent" android:layout_height="match_parent" android:paddingLeft="@dimen/activity_horizontal_margin" android:paddingRight="@dimen/activity_horizontal_margin" android:paddingTop="@dimen/activity_vertical_margin" android:paddingBottom="@dimen/activity_vertical_margin" tools:context="com.example.android.cardview.CardViewActivity" 
tools:ignore="MergeRootFrame" />

You can download the complete Android Studio Source Code from here..