Android中fragment模式

package com.imooc.tab02;

import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentActivity;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentTransaction;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.Window;
import android.widget.ImageButton;
import android.widget.LinearLayout;

public class MainActivity extends FragmentActivity implements OnClickListener
{
private LinearLayout mTabWeixin;
private LinearLayout mTabFrd;
private LinearLayout mTabAddress;
private LinearLayout mTabSettings;

private ImageButton mImgWeixin;
private ImageButton mImgFrd;
private ImageButton mImgAddress;
private ImageButton mImgSettings;

private Fragment mTab01;
private Fragment mTab02;
private Fragment mTab03;
private Fragment mTab04;

@Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.activity_main);
initView();
initEvent();
setSelect(0);
}

private void initEvent()
{
mTabWeixin.setOnClickListener(this);
mTabFrd.setOnClickListener(this);
mTabAddress.setOnClickListener(this);
mTabSettings.setOnClickListener(this);
}

private void initView()
{
mTabWeixin = (LinearLayout) findViewById(R.id.id_tab_weixin);
mTabFrd = (LinearLayout) findViewById(R.id.id_tab_frd);
mTabAddress = (LinearLayout) findViewById(R.id.id_tab_address);
mTabSettings = (LinearLayout) findViewById(R.id.id_tab_settings);

mImgWeixin = (ImageButton) findViewById(R.id.id_tab_weixin_img);
mImgFrd = (ImageButton) findViewById(R.id.id_tab_frd_img);
mImgAddress = (ImageButton) findViewById(R.id.id_tab_address_img);
mImgSettings = (ImageButton) findViewById(R.id.id_tab_settings_img);
}

private void setSelect(int i)
{
FragmentManager fm = getSupportFragmentManager();
FragmentTransaction transaction = fm.beginTransaction();
hideFragment(transaction);
// 把图片设置为亮的
// 设置内容区域
switch (i)
{
case 0:
if (mTab01 == null)
{
mTab01 = new WeixinFragment();
transaction.add(R.id.id_content, mTab01);
} else
{
transaction.show(mTab01);
}
mImgWeixin.setImageResource(R.drawable.tab_weixin_pressed);
break;
case 1:
if (mTab02 == null)
{
mTab02 = new FrdFragment();transaction.add(R.id.id_content, mTab02);
} else
{
transaction.show(mTab02);

}
mImgFrd.setImageResource(R.drawable.tab_find_frd_pressed);
break;
case 2:
if (mTab03 == null)
{
mTab03 = new AddressFragment();
transaction.add(R.id.id_content, mTab03);
} else
{
transaction.show(mTab03);
}
mImgAddress.setImageResource(R.drawable.tab_address_pressed);
break;
case 3:
if (mTab04 == null)
{
mTab04 = new SettingFragment();
transaction.add(R.id.id_content, mTab04);
} else
{
transaction.show(mTab04);
}
mImgSettings.setImageResource(R.drawable.tab_settings_pressed);
break;

default:
break;
}

transaction.commit();
}
/**
* 吧隐藏的fragment去掉
* @param transaction
*/
private void hideFragment(FragmentTransaction transaction)
{
if (mTab01 != null)
{
transaction.hide(mTab01);
}
if (mTab02 != null)
{
transaction.hide(mTab02);
}
if (mTab03 != null)
{
transaction.hide(mTab03);
}
if (mTab04 != null)
{
transaction.hide(mTab04);
}
}

@Override
public void onClick(View v)
{
resetImgs();
switch (v.getId())
{
case R.id.id_tab_weixin:
setSelect(0);
break;
case R.id.id_tab_frd:
setSelect(1);
break;
case R.id.id_tab_address:
setSelect(2);
break;
case R.id.id_tab_settings:
setSelect(3);
break;

default:
break;
}
}

/**
* 切换图片至暗色
*/
private void resetImgs()
{
mImgWeixin.setImageResource(R.drawable.tab_weixin_normal);
mImgFrd.setImageResource(R.drawable.tab_find_frd_normal);
mImgAddress.setImageResource(R.drawable.tab_address_normal);
mImgSettings.setImageResource(R.drawable.tab_settings_normal);
}

}