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        Toolbar toolbar = (Toolbar)findViewById(R.id.toolbar);
        
        //Title and subtitle
        toolbar.setTitle("MY toolbar");
        toolbar.setSubtitle("Subtitle");

        //Menu
        toolbar.inflateMenu(R.menu.toolbar_menu);

        toolbar.setOnMenuItemClickListener(new Toolbar.OnMenuItemClickListener() {

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The Material Components Library introduced with the 1.2.0-alpha03 the new ShapeableImageView.

In your layout you can use:

 <com.google.android.material.imageview.ShapeableImageView
      android:id="@+id/image_view"
      app:srcCompat="@drawable/..." />

Then in your code apply the ShapeAppearanceModel to define your custom corners:

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You can use this class to realize a simple sectioned RecyclerView.Adapter without changing your code.

The RecyclerView should use a LinearLayoutManager. You can use this code also with the TwoWayView with the ListLayoutManager (https://github.com/lucasr/twoway-view)

This is a porting of the class SimpleSectionedListAdapter provided by Google

Example:

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Centralize the firebase libraries dependencies in gradle

ext {
      firebaseVersion = '9.0.0';

      firebaseDependencies = [
              core :         "com.google.firebase:firebase-core:${firebaseVersion}",
              database :     "com.google.firebase:firebase-database:${firebaseVersion}",
              storage :      "com.google.firebase:firebase-storage:${firebaseVersion}",

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package it.gmariotti.android.examples.preference;

import android.os.Bundle;
import android.preference.PreferenceFragment;


public class GenericPreferenceFragment extends PreferenceFragment {
  
	@Override
    public void onCreate(Bundle savedInstanceState) {

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android {

    signingConfigs {
        release
    }

    buildTypes {
            release {
                signingConfig signingConfigs.release
            }

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<!-- Declare the permission for body sensor -->
<uses-permission android:name="android.permission.BODY_SENSORS" />

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You can use this class to realize a simple sectioned grid RecyclerView.Adapter without changing your code.

The RecyclerView has to use a GridLayoutManager.

This is a porting of the class SimpleSectionedListAdapter provided by Google

If you are looking for a sectioned list RecyclerView.Adapter you can take a look here

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public class ColoredSnackBar {

    private static final int red = 0xfff44336;
    private static final int green = 0xff4caf50;
    private static final int blue = 0xff2195f3;
    private static final int orange = 0xffffc107;


    private static View getSnackBarLayout(Snackbar snackbar) {
        if (snackbar != null) {

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public class MainActivity extends Activity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.layoutfab);
        
        //Outline
        int size = getResources().getDimensionPixelSize(R.dimen.fab_size);
        Outline outline = new Outline();