MainActivity.java

package com.zhong.activity;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import android.app.AlertDialog;
import android.app.AlertDialog.Builder;
import android.app.ProgressDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.Color;
import android.os.AsyncTask;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentActivity;
import android.support.v4.view.ViewPager;
import android.support.v4.view.ViewPager.OnPageChangeListener;
import android.util.Log;
import android.view.KeyEvent;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.animation.Animation;
import android.view.animation.AnimationUtils;
import android.widget.LinearLayout;
import android.widget.TextView;

import com.zhong.adapter.MainFragmentPagerAdapter;
import com.zhong.app.MyApplication;
import com.zhong.config.MyConfig;
import com.zhong.fragment.ContentFragment;
import com.zhong.helper.JsonHelper;
import com.zhong.helper.MyHttpClientHelper;

/**
 * 实现主界面 百科、新闻等加载
 * 
 * @author 仲丛旭
 * 
 */
public class MainActivity extends FragmentActivity {
	private final String TAG = "MainActivity";
	/** 导航栏 */
	private LinearLayout layout_main_container;
	/** 存储每一个Fragment的viewPager */
	private ViewPager viewPager_main_content;
	/** 文本导航内容 */
	private TextView[] arr_tabspec;
	/** viewpager适配器的数据源 */
	private List<Fragment> list = null;
	/** 主界面viewPager适配器 */
	private MainFragmentPagerAdapter mainFragmentPagerAdapter;
	/** 五个访问网络数据的url */
	private String[] urlStr;
	/** 全局变量之图片缓存map */
	protected Map<String, Bitmap> cacheImageMap;

	/**
	 * oncreate生命周期的开始
	 */
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		Log.i(TAG, "==onCreate()");
		setContentView(R.layout.activity_main);
		initData();
		initDot();
	}

	private void initData() {
		cacheImageMap = ((MyApplication) (this.getApplication()))
				.getCacheImageMap();
		Log.i(TAG, "cacheImageMap==" + cacheImageMap);
		urlStr = new String[6];
		urlStr[0] = MyConfig.JSON_LIST_DATA_0;
		urlStr[1] = MyConfig.JSON_LIST_DATA_1;
		urlStr[2] = MyConfig.JSON_LIST_DATA_2;
		urlStr[3] = MyConfig.JSON_LIST_DATA_3;
		urlStr[4] = MyConfig.JSON_LIST_DATA_4;
		urlStr[5] = "";
		new MyTask(MainActivity.this).execute(urlStr[0], urlStr[1], urlStr[2],
				urlStr[3], urlStr[4]);
	}

	/**
	 * 初始化导航点
	 */
	public void initDot() {
		/* 导航 */
		layout_main_container = (LinearLayout) findViewById(R.id.layout_main_container);
		arr_tabspec = new TextView[layout_main_container.getChildCount()];
		for (int i = 0; i < arr_tabspec.length; i++) {
			TextView view = (TextView) layout_main_container.getChildAt(i);
			if (i == 5) {
				view.setOnClickListener(new OnClickListener() {

					@Override
					public void onClick(View v) {
						goSearchActivity();

					}
				});
				break;
			}
			arr_tabspec[i] = view;
			if (i == 0) {
				arr_tabspec[i].setEnabled(false);
			} else {
				arr_tabspec[i].setEnabled(true);
				arr_tabspec[i].setBackgroundColor(Color.parseColor("#ebebeb"));
			}
			arr_tabspec[i].setTextColor(Color.GRAY);
			arr_tabspec[i].setTag(i);
			arr_tabspec[i].setOnClickListener(new OnClickListener() {

				@Override
				public void onClick(View v) {
					viewPager_main_content.setCurrentItem((Integer) v.getTag(),
							false);
				}
			});

		}
	}

	/**
	 * 初始化viewPager布局
	 */
	private void initLayout(Map<String, List<Map<String, Object>>> result) {
		Log.i(TAG, "==initLayout()");

		/* viewPager */
		list = new ArrayList<Fragment>();
		for (int i = 0; i < arr_tabspec.length; i++) {
			Fragment fragment = new ContentFragment(urlStr[i],
					(List<Map<String, Object>>) result.get(urlStr[i]),
					cacheImageMap);
			list.add(fragment);
		}
		mainFragmentPagerAdapter = new MainFragmentPagerAdapter(
				getSupportFragmentManager(), list);
		viewPager_main_content = (ViewPager) findViewById(R.id.viewPager_main_content);
		viewPager_main_content.setAdapter(mainFragmentPagerAdapter);
		viewPager_main_content
				.setOnPageChangeListener(new OnPageChangeListener() {

					@Override
					public void onPageSelected(int arg0) {
						Log.i(TAG, "onPageSelected()==arg0-->" + arg0);
						if (arg0 == 5) {
							goSearchActivity();// 跳转到搜索页，然后还原显示最后一个有数据的viewPager页
							arr_tabspec[4].performClick();
							return;
						}
						for (int i = 0; i < arr_tabspec.length - 1; i++) {
							if (i == arg0) {
								arr_tabspec[i].setEnabled(false);
								arr_tabspec[i].setTextColor(Color
										.parseColor("#3d9d01"));
								arr_tabspec[i]
										.setBackgroundResource(R.drawable.tabbg);
							} else {
								arr_tabspec[i].setEnabled(true);
								arr_tabspec[i].setTextColor(Color.GRAY);
								arr_tabspec[i].setBackgroundColor(Color
										.parseColor("#ebebeb"));
							}
						}
					}

					@Override
					public void onPageScrolled(int arg0, float arg1, int arg2) {

					}

					@Override
					public void onPageScrollStateChanged(int arg0) {

					}
				});

	}

	/**
	 * 跳转到搜索页
	 */
	private void goSearchActivity() {
		Log.i(TAG, "==跳转");
		Intent intent = new Intent(MainActivity.this, FunctionActivity.class);
		intent.putExtra("titleTagStr", "0");// 0表示查百科
		startActivity(intent);

	}

	/**
	 * 访问网络得到五页的数据
	 * 
	 * @author 仲丛旭
	 * 
	 */
	class MyTask extends AsyncTask<String, Void, Object> {
		private Context context;
		private ProgressDialog pDialog;

		public MyTask(Context context) {
			this.context = context;
			pDialog = new ProgressDialog(this.context);
			pDialog.setTitle("网络访问");
			pDialog.setMessage("正在加载...");
		}

		@Override
		protected void onPreExecute() {
			super.onPreExecute();
			pDialog.show();
		}

		@Override
		protected Object doInBackground(String... params) {
			Map<String, List<Map<String, Object>>> map = new HashMap<String, List<Map<String, Object>>>();
			for (int i = 0; i < params.length; i++) {
				String jsonString = MyHttpClientHelper.loadTextFromURL(
						params[i], "UTF-8");// 网络访问得到数据
				List<Map<String, Object>> list = JsonHelper.jsonStringToList(
						jsonString, new String[] { "title", "source",
								"nickname", "create_time", "wap_thumb", "id" },
						"data");
				map.put(params[i], list);
			}
			return map;
		}

		@Override
		protected void onPostExecute(Object result) {
			super.onPostExecute(result);
			// Log.i(TAG,"result=="+result);
			initLayout((Map<String, List<Map<String, Object>>>) result);
			pDialog.dismiss();

		}
	}

	/**
	 * 提示是否退出对话框
	 */
	protected void dialog() {
		AlertDialog.Builder builder = new Builder(this);
		builder.setMessage("是否退出?");
		builder.setTitle("操作提示");
		builder.setPositiveButton("是",
				new android.content.DialogInterface.OnClickListener() {
					@Override
					public void onClick(DialogInterface dialog, int which) {
						dialog.dismiss();
						System.exit(0);
					}
				});
		builder.setNegativeButton("否",
				new android.content.DialogInterface.OnClickListener() {
					@Override
					public void onClick(DialogInterface dialog, int which) {
						dialog.dismiss();
					}
				});
		builder.create().show();
	}

	/**
	 * 返回键双击
	 */
	@Override
	public boolean onKeyDown(int keyCode, KeyEvent event) {
		if (keyCode == KeyEvent.KEYCODE_BACK && event.getRepeatCount() == 0) {
			dialog();
			return true;
		}
		return true;
	}

	// =======================================本来想做广告是否隐藏动画来着，结果失败了没弄懂
	// private float lastX = 0;
	// private float lastY = 0;
	// /**判断标题是否隐藏了*/
	// private boolean mIsTitleHide = false;
	//
	// /**
	// * 按下或移动，控件广告是否显示。
	// */
	// @Override
	// public boolean dispatchTouchEvent(MotionEvent event) {
	// super.dispatchTouchEvent(event);
	// Log.i(TAG, "==dispatchTouchEvent()");
	// // if (mIsAnim || viewPager_main_content.getChildCount() <= 1)
	// // {//最大的viewPager
	// // return false;
	// // }
	// final int action = event.getAction();
	//
	// float x = event.getX();
	// float y = event.getY();
	// System.out.println(MotionEvent.ACTION_MOVE);
	// switch (action) {
	// case MotionEvent.ACTION_DOWN:
	// Log.i(TAG, "ACTION_DOWN==");
	// lastY = y;
	// lastX = x;
	// return false;
	// case MotionEvent.ACTION_MOVE:
	// Log.i(TAG, "ACTION_MOVE==");
	// float dY = Math.abs(y - lastY);
	// float dX = Math.abs(x - lastX);
	// boolean down = y > lastY ? true : false;
	// lastY = y;
	// lastX = x;
	// if (dX < 8 && dY > 8 && !mIsTitleHide && !down) {// 判断是否大于8像素
	// //广告布局隐藏
	// // Animation anim = AnimationUtils.loadAnimation(
	// // MainActivity.this, R.anim.push_top_in);
	// // // anim.setFillAfter(true);
	// // anim.setAnimationListener(MainActivity.this);
	// // title.startAnimation(anim);//标题开启动画
	// } else if (dX < 8 && dY > 8 && mIsTitleHide && down) {
	// // Animation anim = AnimationUtils.loadAnimation(
	// // MainActivity.this, R.anim.push_top_out);
	// // // anim.setFillAfter(true);
	// // anim.setAnimationListener(MainActivity.this);
	// // // title.startAnimation(anim);
	// } else {
	// return false;
	// }
	// // mIsTitleHide = !mIsTitleHide;//广告栏标记
	// // mIsAnim = true;
	// break;
	// default:
	// return false;
	// }
	// return false;
	// }

}