UserActivity.java

package com.airlocksoftware.hackernews.activity;

import org.apache.commons.lang3.StringUtils;

import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.view.ViewPager;
import android.support.v4.view.ViewPager.OnPageChangeListener;
import android.view.View;
import android.widget.LinearLayout;
import android.widget.TextView;

import com.airlocksoftware.hackernews.R;
import com.airlocksoftware.hackernews.fragment.AboutUserFragment;
import com.airlocksoftware.hackernews.fragment.SubmissionsFragment;
import com.airlocksoftware.hackernews.fragment.ThreadsFragment;
import com.airlocksoftware.hackernews.interfaces.SharePopupInterface;
import com.airlocksoftware.hackernews.view.SharePopup;
import com.airlocksoftware.holo.actionbar.interfaces.ActionBarClient;
import com.airlocksoftware.holo.adapters.FragmentPagerArrayAdapter;
import com.airlocksoftware.holo.checkable.CheckableView;
import com.airlocksoftware.holo.checkable.CheckableViewManager;
import com.airlocksoftware.holo.checkable.CheckableViewManager.OnCheckedViewChangedListener;
import com.airlocksoftware.holo.utils.ViewUtils;
import com.slidingmenu.lib.SlidingMenu;

public class UserActivity extends SlideoutMenuActivity implements SharePopupInterface {

	private String mUsername;
	private int mCurrentPosition = 0;

	private ViewPager mPager;
	private LinearLayout mTabContainer;
	private SharePopup mSharePopup;

	private FragmentPagerArrayAdapter mAdapter;
	private CheckableViewManager mTabManager;

	public static final String USERNAME = UserActivity.class.getSimpleName() + ".username";

	@Override
	public void onCreate(Bundle savedState) {
		super.onCreate(savedState);
		retrieveBundles(savedState, getIntent().getExtras());
		setContentView(R.layout.act_user);
		findViews();
		setupTabs();
		setupSlidingMenu();
		mAdapter = new FragmentPagerArrayAdapter(getSupportFragmentManager());
		setupFragments();
		mPager.setAdapter(mAdapter);
		mSharePopup = new SharePopup(this, null, getOverlayManager());

		// make sure ActionBar is setup & first tab is checked
		pageListener.onPageSelected(0);
	}

	private void setupSlidingMenu() {
		SlidingMenu menu = super.getSlidingMenu();

		// disable touchmode so that ViewPager works
		menu.setTouchModeAbove(SlidingMenu.TOUCHMODE_NONE);

		// change username to match current user
		setActiveMenuItem(R.id.user_button);
		((TextView) menu.findViewById(R.id.txt_user)).setText(mUsername);
	}

	private void setupFragments() {
		Fragment aboutUserFrag = new AboutUserFragment();
		Bundle aboutUserArgs = new Bundle();
		aboutUserArgs.putString(AboutUserFragment.USERNAME, mUsername);
		aboutUserFrag.setArguments(aboutUserArgs);
		mAdapter.addItem(aboutUserFrag);

		Fragment submissionsFragment = new SubmissionsFragment();
		Bundle submissionsArgs = new Bundle();
		submissionsArgs.putString(SubmissionsFragment.USERNAME, mUsername);
		submissionsFragment.setArguments(submissionsArgs);
		mAdapter.addItem(submissionsFragment);

		Fragment threadsFragment = new ThreadsFragment();
		Bundle threadsArgs = new Bundle();
		threadsArgs.putString(ThreadsFragment.USERNAME, mUsername);
		threadsFragment.setArguments(threadsArgs);
		mAdapter.addItem(threadsFragment);
	}

	private void setupTabs() {
		mTabManager = new CheckableViewManager();
		for (View tab : ViewUtils.directChildViews(mTabContainer)) {
			mTabManager.register((CheckableView) tab);
		}
		mTabManager.setOnCheckedChangedListener(tabListener);
		mPager.setOnPageChangeListener(pageListener);
	}

	private void findViews() {
		mPager = (ViewPager) findViewById(R.id.viewpager);
		mTabContainer = (LinearLayout) findViewById(R.id.cnt_tabs);
	}

	private void retrieveBundles(Bundle savedState, Bundle extras) {
		if (extras != null) mUsername = extras.getString(USERNAME);
		if (savedState != null) mUsername = savedState.getString(USERNAME);
		if (StringUtils.isBlank(mUsername)) throw new RuntimeException("Username passed to UserActivity is blank!");
	}

	@Override
	public void onSaveInstanceState(Bundle outState) {
		super.onSaveInstanceState(outState);
		outState.putString(USERNAME, mUsername);
	}

	OnPageChangeListener pageListener = new ViewPager.OnPageChangeListener() {
		@Override
		public void onPageScrollStateChanged(int arg0) {
			// do nothing
		}

		@Override
		public void onPageScrolled(int arg0, float arg1, int arg2) {
			// do nothing
		}

		@Override
		public void onPageSelected(int position) {
			((ActionBarClient) mAdapter.getItem(mCurrentPosition)).cleanupActionBar(UserActivity.this,
					getActionBarView().getController());
			((ActionBarClient) mAdapter.getItem(position)).setupActionBar(UserActivity.this,
					getActionBarView().getController());

			mCurrentPosition = position;
			mTabManager.protectedCheck(mTabManager.getChildAt(position)
																						.getId());
		}
	};

	private OnCheckedViewChangedListener tabListener = new OnCheckedViewChangedListener() {
		@Override
		public void onCheckedViewChanged(CheckableViewManager manager, int newIndex, int oldIndex) {
			mPager.setCurrentItem(newIndex);
		}
	};

	public static void startUserActivity(Context context, String username) {
		Intent intent = new Intent(context, UserActivity.class);
		intent.putExtra(UserActivity.USERNAME, username);
		context.startActivity(intent);
	}

	@Override
	public SharePopup getSharePopup() {
		return mSharePopup;
	}

}