MainActivity.java

package com.codecomb.views;

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

import android.os.Bundle;
import android.os.Parcelable;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentActivity;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;
import android.support.v4.view.ViewPager;
import android.util.Log;
import android.view.KeyEvent;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;

import com.codecomb.events.AppExitEvent;
import com.codecomb.events.ShowBroadcastEvent;
import com.codecomb.ufreedom.R;

import de.greenrobot.event.EventBus;

public class MainActivity extends FragmentActivity
		implements
			View.OnClickListener {

	private ViewPager viewPager;
	private Button vContest;
	private View vAboutMe;
	private View vMessage;
	private View vBroadcast;

	private MyPagerAdapter pagerAdapter;

	private static final int ACTIVITY_ITEM_CONTEST = 0;
	private static final int ACTIVITY_ITEM_BROADCAST = 1;
	private static final int ACTIVITY_ITEM_MESSAGE = 2;
	private static final int ACTIVITY_ITEM_ABOUT_ME = 3;
	protected static final String TAG = "com.ufreedom.codecomb.uis.MainActivity";
	private static final int PRESSED_BACK_TIMESPAN = 3000;

	private long lastBackPressedTime = 0;

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

		EventBus.getDefault().register(this);
		
		
		initWidget();

		initViewPagerListener();

		updateBottomNavigateBtnState(ACTIVITY_ITEM_CONTEST);

	}

	private void initWidget() {

		viewPager = (ViewPager) findViewById(R.id.viewPager);

		pagerAdapter = new MyPagerAdapter(getSupportFragmentManager());
		viewPager.setAdapter(pagerAdapter);

		vAboutMe = findViewById(R.id.vAboutMe);
		vAboutMe.setOnClickListener(this);
		vBroadcast = findViewById(R.id.vBroadcast);
		vBroadcast.setOnClickListener(this);

		vContest = (Button) findViewById(R.id.vContest);
		vContest.setOnClickListener(this);

		vMessage = findViewById(R.id.vMessage);
		vMessage.setOnClickListener(this);

	}

	private void initViewPagerListener() {

		viewPager
				.setOnPageChangeListener(new ViewPager.SimpleOnPageChangeListener() {

					@Override
					public void onPageSelected(int position) {

						updateBottomNavigateBtnState(position);
					}

				});

	}

	@Override
	public void onClick(View v) {

		switch (v.getId()) {
			case R.id.vContest :

				viewPager.setCurrentItem(ACTIVITY_ITEM_CONTEST);

				break;

			case R.id.vBroadcast :

				viewPager.setCurrentItem(ACTIVITY_ITEM_BROADCAST);

				break;

			case R.id.vMessage :
				viewPager.setCurrentItem(ACTIVITY_ITEM_MESSAGE);

				break;

			case R.id.vAboutMe :
				viewPager.setCurrentItem(ACTIVITY_ITEM_ABOUT_ME);

				break;

			default :

				break;
		}

	}

	private void updateBottomNavigateBtnState(int which) {

		switch (which) {
			case ACTIVITY_ITEM_CONTEST :

				vContest.setSelected(true);
				vBroadcast.setSelected(false);
				vMessage.setSelected(false);
				vAboutMe.setSelected(false);

				break;

			case ACTIVITY_ITEM_BROADCAST :

				vBroadcast.setSelected(true);

				vContest.setSelected(false);
				vMessage.setSelected(false);
				vAboutMe.setSelected(false);
				break;

			case ACTIVITY_ITEM_MESSAGE :

				vMessage.setSelected(true);

				vContest.setSelected(false);
				vBroadcast.setSelected(false);
				vAboutMe.setSelected(false);

				break;

			case ACTIVITY_ITEM_ABOUT_ME :

				vAboutMe.setSelected(true);

				vContest.setSelected(false);
				vBroadcast.setSelected(false);
				vMessage.setSelected(false);

				break;

			default :
				break;
		}

	}

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

	public class MyPagerAdapter extends FragmentPagerAdapter {

		List<Fragment> fragments = new ArrayList<Fragment>();

		public MyPagerAdapter(FragmentManager fm) {
			super(fm);
			fragments.add(ContestsFragment.newInstance());
			fragments.add(BroadcastFragment.newInstance());
			fragments.add(MessageFragment.newInstance());
			fragments.add(ProfileFragment.newInstance());
		}

		@Override
		public Fragment getItem(int postion) {
			return fragments.get(postion);
		}

		@Override
		public int getCount() {
			return fragments.size();
		}

	}

	@Override
	public boolean onKeyDown(int keyCode, KeyEvent event) {

		if (keyCode == KeyEvent.KEYCODE_BACK) {

			long time = System.currentTimeMillis();

			if (time - lastBackPressedTime < PRESSED_BACK_TIMESPAN) {

				EventBus.getDefault().post(new AppExitEvent());
				finish();

			} else {
				lastBackPressedTime = time;
				Toast.makeText(this, R.string.msg_press_again_exit,
						Toast.LENGTH_SHORT).show();
			}

			return true;

		}

		return false;
	}
	
	

	public void onEvent(ShowBroadcastEvent event) {

		Log.e(TAG, "显示广播");

		
		FragmentManager fragmentManager = getSupportFragmentManager();

		BroadcastDialogFragment fragment = BroadcastDialogFragment
				.newInstance(event.getContent());
		fragment.show(fragmentManager, "BroadcastDialog");

	}

}