Main_HomeAty.java

package com.hjdz.install.activity;

import com.hjdz.install.R;
import com.hjdz.install.R.id;
import com.hjdz.install.R.layout;
import com.hjdz.install.fragment.My_InfoFrag;
import com.hjdz.install.fragment.Msg_ListFrag;
import com.hjdz.install.fragment.Order_ListFrag;
import com.hjdz.install.fragment.Prefer_ListFrag;
import com.hjdz.install.util.ToastUtil;
import com.hjdz.install.widget.TabView;

import android.app.AlertDialog;
import android.app.AlertDialog.Builder;
import android.content.Context;
import android.content.DialogInterface;
import android.content.DialogInterface.OnClickListener;
import android.os.Bundle;
import android.support.v4.app.FragmentActivity;
import android.support.v4.app.FragmentTabHost;
import android.view.KeyEvent;
import android.view.View;
import android.widget.ImageView;
import android.widget.RadioGroup;
import android.widget.RadioGroup.OnCheckedChangeListener;
import android.widget.TabHost.TabSpec;

public class Main_HomeAty extends FragmentActivity {

	// 定义FragmentTabHost对象
	private FragmentTabHost mTabHost;

	private RadioGroup mTabRg;

	private Context mContext;

	private TabView tabView_msg, tabView_order, tabView_pre, tabView_my;

	private ImageView img_NewOrder;

	@SuppressWarnings("rawtypes")
	private final Class[] fragments = { Msg_ListFrag.class,
			Order_ListFrag.class, Prefer_ListFrag.class,
			My_InfoFrag.class };

	@Override
protected void onCreate(Bundle savedInstanceState) {   
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		mContext = this;
		initView();
	}

	private void initView() {
		mTabHost = (FragmentTabHost) findViewById(android.R.id.tabhost);
		tabView_msg = (TabView) findViewById(R.id.tab_1);
		tabView_order = (TabView) findViewById(R.id.tab_2);
		tabView_pre = (TabView) findViewById(R.id.tab_3);
		tabView_my = (TabView) findViewById(R.id.tab_4);
		img_NewOrder = (ImageView) findViewById(R.id.img_new_order);

		tabView_msg.setHasTip(true);

		img_NewOrder
				.setOnClickListener(new android.view.View.OnClickListener() {

					@Override
					public void onClick(View v) {
						ToastUtil.show(mContext, "下单", 500);
					}
				});

		mTabHost.setup(this, getSupportFragmentManager(), R.id.realtabcontent);
		// 得到fragment的个数
		int count = fragments.length;
		for (int i = 0; i < count; i++) {
			// 为每一个Tab按钮设置图标、文字和内容
			TabSpec tabSpec = mTabHost.newTabSpec(i + "").setIndicator(i + "");
			// 将Tab按钮添加进Tab选项卡中
			mTabHost.addTab(tabSpec, fragments[i], null);
		}

		mTabRg = (RadioGroup) findViewById(R.id.tab_rg_menu);
		mTabRg.setOnCheckedChangeListener(new OnCheckedChangeListener() {

			@Override
			public void onCheckedChanged(RadioGroup group, int checkedId) {
				switch (checkedId) {
				case R.id.tab_1:
					mTabHost.setCurrentTab(0);
//					ToastUtil.show(mContext, "消息", 500);
					break;
				case R.id.tab_2:
					mTabHost.setCurrentTab(1);
//					ToastUtil.show(mContext, "订单管理", 500);
					break;
				case R.id.tab_3:
					mTabHost.setCurrentTab(2);
//					ToastUtil.show(mContext, "活动", 500);
					break;
				case R.id.tab_4:
					mTabHost.setCurrentTab(3);
//					ToastUtil.show(mContext, "我的", 500);
					break;
				default:
					break;
				}
			}
		});
	}

	@Override
	public boolean onKeyDown(int keyCode, KeyEvent event) {
		if (keyCode == KeyEvent.KEYCODE_BACK) {
			showExitDialog();
			return false;
		} else {
			return super.onKeyDown(keyCode, event);
		}
	}

	/**
	 * 显示退出对话框
	 */
	public void showExitDialog() {
		AlertDialog.Builder dialog = new Builder(mContext);
		dialog.setTitle("提醒");
		dialog.setMessage("确认退出吗？");
		dialog.setPositiveButton("确定", new OnClickListener() {

			@Override
			public void onClick(DialogInterface dialog, int which) {
				System.exit(0);
			}
		});
		dialog.setNegativeButton("取消", null);
		dialog.show();
	}

}