Main_HomeAty.java

package com.ttj.supplier.activity;

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.widget.RadioButton;
import android.widget.RadioGroup;
import android.widget.RadioGroup.OnCheckedChangeListener;
import android.widget.TabHost.TabSpec;

import com.ttj.supplier.MyApplication;
import com.ttj.supplier.R;
import com.ttj.supplier.fragment.MainProduct_Fragment;
import com.ttj.supplier.fragment.Order_Fragment;
import com.ttj.supplier.fragment.User_Fragment;

public class Main_HomeAty extends FragmentActivity {

	// 定义FragmentTabHost对象
	public static FragmentTabHost mTabHost;
	private RadioGroup mTabRg;
	public static RadioButton rbHome;
	public static Context mContext;

	@SuppressWarnings("rawtypes")
	private final Class[] fragments = { MainProduct_Fragment.class,
			Order_Fragment.class, User_Fragment.class };

	// private final Class[] fragments = { Order_Fragment.class,
	// User_Fragment.class };
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		MyApplication.getInstance().addActivity(this);
		setContentView(R.layout.tab_main_home_layout);
		mContext = this;
		initView();
	}

	private void initView() {
		mTabHost = (FragmentTabHost) findViewById(android.R.id.tabhost);
		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_rb_1:
					mTabHost.setCurrentTab(0);
					break;
				case R.id.tab_rb_2:
					mTabHost.setCurrentTab(1);
					break;
				case R.id.tab_rb_3:
					mTabHost.setCurrentTab(2);
					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 static 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) {
				MyApplication.getInstance().finishAllActivity();
			}
		});
		dialog.setNegativeButton("取消", null);
		dialog.show();
	}

}