MainActivity.java

package com.refactech.driibo.ui;

import com.refactech.driibo.R;
import com.refactech.driibo.type.dribble.Category;
import com.refactech.driibo.ui.fragment.BasePageListFragment;
import com.refactech.driibo.ui.fragment.DrawerFragment;
import com.refactech.driibo.ui.fragment.FollowingFragment;
import com.refactech.driibo.ui.fragment.LikeFragment;
import com.refactech.driibo.ui.fragment.ShotsFragment;

import android.app.ActionBar;
import android.content.Intent;
import android.content.res.Configuration;
import android.graphics.Color;
import android.os.Bundle;
import android.support.v4.app.ActionBarDrawerToggle;
import android.support.v4.app.FragmentActivity;
import android.support.v4.app.FragmentManager;
import android.support.v4.view.GravityCompat;
import android.support.v4.widget.DrawerLayout;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.Window;

import uk.co.senab.actionbarpulltorefresh.library.PullToRefreshAttacher;

public class MainActivity extends FragmentActivity {
    private DrawerLayout mDrawerLayout;

    private ActionBarDrawerToggle mDrawerToggle;

    private BasePageListFragment mContentFragment;

    private Category mCategory;

    private Menu mMenu;

    private PullToRefreshAttacher mPullToRefreshAttacher;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        requestWindowFeature(Window.FEATURE_INDETERMINATE_PROGRESS);
        setContentView(R.layout.activity_main);
        findViews();
        mDrawerLayout.setDrawerShadow(R.drawable.drawer_shadow, GravityCompat.START);
        mDrawerLayout.setScrimColor(Color.argb(100, 0, 0, 0));
        ActionBar actionBar = getActionBar();
        actionBar.setIcon(R.drawable.ic_actionbar);
        actionBar.setDisplayHomeAsUpEnabled(true);
        actionBar.setHomeButtonEnabled(true);
        actionBar.setDisplayShowTitleEnabled(false);

        mDrawerToggle = new ActionBarDrawerToggle(this, mDrawerLayout, R.drawable.ic_drawer,
                R.string.drawer_open, R.string.drawer_close) {
            public void onDrawerClosed(View view) {
                mMenu.findItem(R.id.action_refresh).setVisible(true);
            }

            public void onDrawerOpened(View drawerView) {
                mMenu.findItem(R.id.action_refresh).setVisible(false);
            }
        };
        mDrawerLayout.setDrawerListener(mDrawerToggle);
        PullToRefreshAttacher.Options options = new PullToRefreshAttacher.Options();
        options.headerInAnimation = R.anim.pulldown_fade_in;
        options.headerOutAnimation = R.anim.pulldown_fade_out;
        options.refreshScrollDistance = 0.3f;
        options.headerLayout = R.layout.pulldown_header;
        mPullToRefreshAttacher = new PullToRefreshAttacher(this, options);

        setCategory(Category.popular);
        FragmentManager fragmentManager = getSupportFragmentManager();
        fragmentManager.beginTransaction().replace(R.id.left_drawer, new DrawerFragment()).commit();
    }

    @Override
    protected void onPostCreate(Bundle savedInstanceState) {
        super.onPostCreate(savedInstanceState);
        mDrawerToggle.syncState();
    }

    @Override
    public void onConfigurationChanged(Configuration newConfig) {
        super.onConfigurationChanged(newConfig);
        mDrawerToggle.onConfigurationChanged(newConfig);
    }

    private void findViews() {
        mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.main, menu);
        mMenu = menu;
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        if (mDrawerToggle.onOptionsItemSelected(item)) {
            return true;
        }
        switch (item.getItemId()) {
            case R.id.action_refresh:
                mContentFragment.loadFirstPageAndScrollToTop();
                return true;
            case R.id.action_settings:
                startActivity(new Intent(this, PreferenceActivity.class));
                return true;
            default:
                return super.onOptionsItemSelected(item);
        }

    }

    public void setCategory(Category category) {
        mDrawerLayout.closeDrawer(GravityCompat.START);
        if (mCategory == category) {
            return;
        }
        mPullToRefreshAttacher.setRefreshing(false);
        mCategory = category;

        if (category == Category.following) {
            mContentFragment = FollowingFragment.newInstance();
        } else if (category == Category.likes) {
            mContentFragment = LikeFragment.newInstance();
        } else {
            mContentFragment = ShotsFragment.newInstance(category);
        }
        FragmentManager fragmentManager = getSupportFragmentManager();
        fragmentManager.beginTransaction().replace(R.id.content_frame, mContentFragment).commit();
    }

    public PullToRefreshAttacher getPullToRefreshAttacher() {
        return mPullToRefreshAttacher;
    }
}