HomeActivity.java

package com.lh.fly.ui.activity;

import android.graphics.Color;
import android.graphics.drawable.ColorDrawable;
import android.os.Bundle;
import android.os.Handler;
import android.support.v4.widget.SwipeRefreshLayout;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.view.View;
import android.widget.AdapterView;
import android.widget.Toast;

import com.lh.fly.App;
import com.lh.fly.R;
import com.lh.fly.api.AccessTokenKeeper;
import com.lh.fly.common.assist.Toastor;
import com.lh.fly.common.log.Log;
import com.lh.fly.data.statuses.AccessStatusesService;
import com.lh.fly.model.HomeTimeLine;
import com.lh.fly.ui.adapter.HomeStatusesAdapter;
import com.lh.fly.ui.adapter.SimpleDividerItemDecoration;
import com.mikepenz.google_material_typeface_library.GoogleMaterial;
import com.mikepenz.iconics.IconicsDrawable;
import com.mikepenz.materialdrawer.Drawer;
import com.mikepenz.materialdrawer.accountswitcher.AccountHeader;
import com.mikepenz.materialdrawer.model.DividerDrawerItem;
import com.mikepenz.materialdrawer.model.ProfileDrawerItem;
import com.mikepenz.materialdrawer.model.ProfileSettingDrawerItem;
import com.mikepenz.materialdrawer.model.SecondaryDrawerItem;
import com.mikepenz.materialdrawer.model.interfaces.IDrawerItem;
import com.mikepenz.materialdrawer.model.interfaces.IProfile;
import com.sina.weibo.sdk.openapi.models.Status;

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

import butterknife.InjectView;
import retrofit.Callback;
import retrofit.RetrofitError;
import retrofit.client.Response;

public class HomeActivity extends BaseActivity implements SwipeRefreshLayout.OnRefreshListener {

    private static final int DEFAULT_LOAD_COUNT = 20;

    @InjectView(R.id.swipe_refresh)
    SwipeRefreshLayout swipeRefresh;
    @InjectView(R.id.rv_home_statuses)
    RecyclerView rcHomeStatuses;
    private HomeStatusesAdapter mHomeStatusesAdapter;
    private LinearLayoutManager mllManager;
    /** Drawer */
    private AccountHeader.Result mHeaderResult = null;
    private Drawer.Result mDrawerResult = null;

    private int previousTotal = 0; // The total number of items in the dataset after the last load
    private boolean loading = false; // True if we are still waiting for the last set of data to load.
    private int visibleThreshold = 5; // The minimum amount of items to have below your current scroll position before loading more.
    int firstVisibleItem, visibleItemCount, totalItemCount;
    private long sinceId = 0;

    private IProfile profile = new ProfileDrawerItem().withName("我这个疯子啊").withEmail("464538715@qq.com").withIcon("https://avatars3.githubusercontent.com/u/1476232?v=3&s=460");

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

        init();
    }

    @Override
    protected void init() {
        super.init();

        // init view
        mToolbar.setTitle(getResources().getString(R.string.app_name));
        // 设置刷新颜色
        swipeRefresh.setColorSchemeColors(getResources().getIntArray(R.array.color_scheme_colors));
        swipeRefresh.setOnRefreshListener(this);
        // 设置divider
        rcHomeStatuses.addItemDecoration(
                new SimpleDividerItemDecoration(getResources().getDrawable(R.drawable.rv_divider)));
        // setLayoutManager
        mllManager = new LinearLayoutManager(getApplicationContext());
        rcHomeStatuses.setLayoutManager(mllManager);
        mHomeStatusesAdapter = new HomeStatusesAdapter(this);
        rcHomeStatuses.setAdapter(mHomeStatusesAdapter);
        rcHomeStatuses.setHasFixedSize(true);
        rcHomeStatuses.addOnScrollListener(new RecyclerView.OnScrollListener() {
            @Override
            public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
                super.onScrolled(recyclerView, dx, dy);

                int end = recyclerView.getChildCount() + mllManager.findFirstVisibleItemPosition();
                int totalItemCount = mllManager.getItemCount();
                // 到达底部进行加载更多
                if (end == totalItemCount && !loading) {
                    // 只调用一次
                    onLoadMore();
                }
//                visibleItemCount = recyclerView.getChildCount();
//                totalItemCount = mllManager.getItemCount();
//                firstVisibleItem = mllManager.findFirstVisibleItemPosition();
//
//                if (loading) {
//                    if (totalItemCount > previousTotal) {
//                        loading = false;
//                        previousTotal = totalItemCount;
//                    }
//                }
//                if (!loading && (totalItemCount - visibleItemCount) <= (firstVisibleItem + visibleThreshold)) {
//                    onLoadMore();
//                    loading = true;
//                }
            }
        });

        // Create the AccountHeader
        mHeaderResult = new AccountHeader()
                .withActivity(this)
                .withHeaderBackground(new ColorDrawable(Color.DKGRAY))
                .addProfiles(
                        profile,
                        //don't ask but google uses 14dp for the add account icon in gmail but 20dp for the normal icons (like manage account)
                        new ProfileSettingDrawerItem().withName("添加账户").withIcon(new IconicsDrawable(this, GoogleMaterial.Icon.gmd_add).actionBarSize().paddingDp(5).colorRes(R.color.material_drawer_primary_text)).withIdentifier(1),
                        new ProfileSettingDrawerItem().withName("管理账户").withIcon(GoogleMaterial.Icon.gmd_settings)
                ).build();

        mDrawerResult = new Drawer()
                .withActivity(this)
                .withToolbar(mToolbar)
                .withAccountHeader(mHeaderResult)
                .addDrawerItems(
                        new DividerDrawerItem(),
                        new SecondaryDrawerItem().withName("设置")
                )
                .withOnDrawerItemClickListener(new Drawer.OnDrawerItemClickListener() {
                    @Override
                    public void onItemClick(AdapterView<?> parent, View view, int position, long id, IDrawerItem drawerItem) {
                        // do something with the clicked item :D
                    }
                })
                .build();

        new Handler().postDelayed(new Runnable() {
            @Override
            public void run() {
                swipeRefresh.setRefreshing(true);
                loadData();
            }
        }, 100);
    }

    /**
     * 监听刷新 加载数据
     */
    @Override
    public void onRefresh() {
        sinceId = 0;
        loadData();
    }

    private void onLoadMore() {
        new Handler().postDelayed(new Runnable() {
            @Override
            public void run() {
                loading = true;
                loadData();
            }
        }, 2000);
    }

    private void loadData() {
        AccessStatusesService accessStatusesService = App.getService(AccessStatusesService.class);
        accessStatusesService.getDefaultHomeTimeLine(
                AccessTokenKeeper.readAccessToken(getApplicationContext()).getToken(),
                sinceId,
                DEFAULT_LOAD_COUNT,
                new Callback<HomeTimeLine>() {
                    @Override
                    public void success(HomeTimeLine homeTimeLine, Response response) {
                        Toast.makeText(getApplicationContext(), "成  功", Toast.LENGTH_SHORT).show();
                        loading = false;
                        mHomeStatusesAdapter.update(homeTimeLine.statuses);
                        sinceId = homeTimeLine.since_id;
                        closeRefresh();
                    }

                    @Override
                    public void failure(RetrofitError error) {
                        Toast.makeText(getApplicationContext(), "失  败", Toast.LENGTH_SHORT).show();
                        closeRefresh();
                    }
                });
    }

    private void closeRefresh() {
        if (null != swipeRefresh && swipeRefresh.isRefreshing()) {
           swipeRefresh.setRefreshing(false);
        }
    }

}