@Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_simple_custom_tab);

        findViewById(R.id.start_custom_tab).setOnClickListener(this);

        mUrlEditText = (EditText)findViewById(R.id.url);
    }
The simplest way to use Chrome Custom Tabs. Without any customization or speeding process.
demos/src/main/java/org/chromium/customtabsdemos/SimpleCustomTabActivity.java