MainActivity.java

package org.rocko.demos.stff;

import android.graphics.Color;
import android.os.Bundle;
import android.support.v7.app.ActionBarActivity;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.support.v7.widget.Toolbar;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.view.animation.AccelerateInterpolator;
import android.view.animation.DecelerateInterpolator;
import android.widget.FrameLayout;
import android.widget.ImageButton;
import android.widget.Toast;

import com.readystatesoftware.systembartint.SystemBarTintManager;

import org.rocko.demos.stff.adapter.RecyclerAdapter;

import java.util.ArrayList;
import java.util.List;


public class MainActivity extends ActionBarActivity {

    private Toolbar mToolbar;
    private ImageButton mFabButton;


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        init();
//        SystemBarTintManager tintManager = new SystemBarTintManager(this);
//        // enable status bar tint
//        tintManager.setStatusBarTintEnabled(true);
        // enable navigation bar tint

//        hackStatusBarTransparent();
    }

    protected void hackStatusBarTransparent()
    {
        ViewGroup localViewGroup = (ViewGroup)getWindow().getDecorView().findViewById(android.R.id.statusBarBackground);
        View localView = new View(this);
        setStatusViewBackground(localView);
        localViewGroup.addView(localView, -1, 80);
    }

    protected void setStatusViewBackground(View paramView)
    {
        paramView.setBackgroundColor(Color.RED);
    }

    private void init() {
        mToolbar = (Toolbar) findViewById(R.id.toolbar);
        setSupportActionBar(mToolbar);
        setTitle(R.string.app_name);
        mToolbar.setTitleTextColor(Color.WHITE);

        mFabButton = (ImageButton) findViewById(R.id.fab);
        mFabButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Toast.makeText(getApplicationContext(), "FAB", Toast.LENGTH_SHORT).show();
            }
        });

        RecyclerView recyclerView = (RecyclerView) findViewById(R.id.recycler_view);
        recyclerView.setLayoutManager(new LinearLayoutManager(this));
        RecyclerAdapter recyclerAdapter = new RecyclerAdapter(createItemList());
        recyclerView.setAdapter(recyclerAdapter);
        recyclerView.setOnScrollListener(new HidingScrollListener() {
            @Override
            public void onHide() {
                hideViews();
            }

            @Override
            public void onShow() {
                showViews();
            }
        });

    }

    private void showViews() {
        mToolbar.animate().translationY(0).setInterpolator(new DecelerateInterpolator());
        mFabButton.animate().translationY(0).setInterpolator(new DecelerateInterpolator());
    }

    private void hideViews() {
        mToolbar.animate().translationY(-mToolbar.getHeight()).setInterpolator(new AccelerateInterpolator());

        FrameLayout.LayoutParams lp = (FrameLayout.LayoutParams) mFabButton.getLayoutParams();
        int fabBottomMargin = lp.bottomMargin;
        mFabButton.animate().translationY(mFabButton.getHeight() + fabBottomMargin).setInterpolator(new AccelerateInterpolator());
    }

    private List<String> createItemList() {
        List<String> itemList = new ArrayList<String>();
        for (int i = 1; i <= 18; i++) {
            itemList.add("Item " + i);
        }
        return itemList;
    }


    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.menu_main, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();

        //noinspection SimplifiableIfStatement
        if (id == R.id.action_settings) {
            return true;
        }

        return super.onOptionsItemSelected(item);
    }
}