Related.java

package me.ccrama.redditslide.Activities;

import android.content.DialogInterface;
import android.content.Intent;
import android.os.Bundle;
import android.support.v4.widget.SwipeRefreshLayout;
import android.support.v7.widget.RecyclerView;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;

import com.afollestad.materialdialogs.AlertDialogWrapper;

import me.ccrama.redditslide.Adapters.ContributionAdapter;
import me.ccrama.redditslide.Adapters.SubredditSearchPosts;
import me.ccrama.redditslide.ColorPreferences;
import me.ccrama.redditslide.Constants;
import me.ccrama.redditslide.R;
import me.ccrama.redditslide.Views.CatchStaggeredGridLayoutManager;
import me.ccrama.redditslide.Views.PreCachingLayoutManager;
import me.ccrama.redditslide.Visuals.Palette;
import me.ccrama.redditslide.handler.ToolbarScrollHideHandler;
import me.ccrama.redditslide.util.LogUtil;

public class Related extends BaseActivityAnim {

    //todo NFC support

    public static final String EXTRA_URL = "url";

    private int totalItemCount;
    private int visibleItemCount;
    private int pastVisiblesItems;
    private ContributionAdapter adapter;

    private SubredditSearchPosts posts;


    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        switch (item.getItemId()) {
            case R.id.home:
                onBackPressed();
                return true;
        }
        return false;
    }

    String url;

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

        applyColorTheme("");
        setContentView(R.layout.activity_search);
        Intent intent = getIntent();
        if (intent.hasExtra(Intent.EXTRA_TEXT) && !intent.getExtras().getString(Intent.EXTRA_TEXT, "").isEmpty()) {
            url = intent.getStringExtra(Intent.EXTRA_TEXT);
        }
        if(intent.hasExtra(EXTRA_URL)){
            url = intent.getStringExtra(EXTRA_URL);
        }
        if(url == null || url.isEmpty()){
            new AlertDialogWrapper.Builder(this).setTitle("URL is empty")
                    .setMessage("Try again with a different link!")
                    .setCancelable(false)
                    .setPositiveButton(R.string.btn_ok, new DialogInterface.OnClickListener() {
                        @Override
                        public void onClick(DialogInterface dialogInterface, int i) {
                            finish();
                        }
                    }).show();
        } else {

        }

        setupAppBar(R.id.toolbar, "Related links", true, true);

        assert mToolbar != null; //it won't be, trust me
        mToolbar.setPopupTheme(new ColorPreferences(this).getFontStyle().getBaseId());

        final RecyclerView rv = ((RecyclerView) findViewById(R.id.vertical_content));
        final PreCachingLayoutManager mLayoutManager;
        mLayoutManager = new PreCachingLayoutManager(this);
        rv.setLayoutManager(mLayoutManager);

        rv.addOnScrollListener(new ToolbarScrollHideHandler(mToolbar, findViewById(R.id.header)) {
            @Override
            public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
                super.onScrolled(recyclerView, dx, dy);

                visibleItemCount = rv.getLayoutManager().getChildCount();
                totalItemCount = rv.getLayoutManager().getItemCount();
                if (rv.getLayoutManager() instanceof PreCachingLayoutManager) {
                    pastVisiblesItems = ((PreCachingLayoutManager) rv.getLayoutManager()).findFirstVisibleItemPosition();
                } else {
                    int[] firstVisibleItems = null;
                    firstVisibleItems = ((CatchStaggeredGridLayoutManager) rv.getLayoutManager()).findFirstVisibleItemPositions(firstVisibleItems);
                    if (firstVisibleItems != null && firstVisibleItems.length > 0) {
                        pastVisiblesItems = firstVisibleItems[0];
                    }
                }

                if (!posts.loading && (visibleItemCount + pastVisiblesItems) + 5>= totalItemCount) {
                    posts.loading = true;
                    posts.loadMore(adapter, "", "url:" + url, false);

                }
            }
        });
        final SwipeRefreshLayout mSwipeRefreshLayout = (SwipeRefreshLayout) findViewById(R.id.activity_main_swipe_refresh_layout);

        mSwipeRefreshLayout.setColorSchemeColors(Palette.getColors("", this));

        //If we use 'findViewById(R.id.header).getMeasuredHeight()', 0 is always returned.
        //So, we estimate the height of the header in dp.
        mSwipeRefreshLayout.setProgressViewOffset(false,
                Constants.SINGLE_HEADER_VIEW_OFFSET - Constants.PTR_OFFSET_TOP,
                Constants.SINGLE_HEADER_VIEW_OFFSET + Constants.PTR_OFFSET_BOTTOM);

        mSwipeRefreshLayout.post(new Runnable() {
            @Override
            public void run() {
                mSwipeRefreshLayout.setRefreshing(true);
            }
        });

        posts = new SubredditSearchPosts("", "url:" + url, this);
        adapter = new ContributionAdapter(this, posts, rv);
        rv.setAdapter(adapter);

        posts.bindAdapter(adapter, mSwipeRefreshLayout);
        //TODO catch errors
        mSwipeRefreshLayout.setOnRefreshListener(
                new SwipeRefreshLayout.OnRefreshListener() {
                    @Override
                    public void onRefresh() {
                        posts.loadMore(adapter, "", "url:" + url, true);
                        //TODO catch errors
                    }
                }
        );
    }
}