Android中的Fragment页面切换和selector选择器

效果如图：

提示：下面是用的整个的图片

下面看代码：

//--------------------这是主页面布局文件-----------------------

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:orientation="vertical"    tools:context="shaoshan.bwie.com.shaoshan.activity.HomeActivity">

<FrameLayout        android:id="@+id/home_frameLayout"        android:layout_width="match_parent"        android:layout_height="0dp"        android:layout_weight="1"></FrameLayout>

<RadioGroup        android:id="@+id/home_rg"        android:layout_width="match_parent"        android:layout_height="50dp"        android:layout_marginBottom="2dp"        android:background="#FFFFFF"        android:orientation="horizontal">

<RadioButton            android:id="@+id/home_rb_personalcenter"            android:layout_width="0dp"            android:layout_height="match_parent"            android:layout_weight="1"            android:background="@drawable/radio_person"            android:button="@null" />

<RadioButton            android:id="@+id/home_rb_search"            android:layout_width="0dp"            android:layout_height="match_parent"            android:layout_weight="1"            android:background="@drawable/radio_seach"            android:button="@null" />

<RadioButton            android:id="@+id/home_rb_home"            android:layout_width="0dp"            android:layout_height="match_parent"            android:layout_weight="1"            android:background="@drawable/radio_home"            android:button="@null" />

<RadioButton            android:id="@+id/home_rb_map"            android:layout_width="0dp"            android:layout_height="match_parent"            android:layout_weight="1"            android:background="@drawable/radio_map"            android:button="@null" />

<RadioButton            android:id="@+id/home_rb_more"            android:layout_width="0dp"            android:layout_height="match_parent"            android:layout_weight="1"            android:background="@drawable/radio_more"            android:button="@null" />    </RadioGroup></LinearLayout>

//--------------------这是我的主页面--------------------------

package shaoshan.bwie.com.shaoshan.activity;

import android.app.FragmentManager;import android.app.FragmentTransaction;import android.os.Bundle;import android.support.v7.app.AppCompatActivity;import android.widget.RadioButton;import android.widget.RadioGroup;

import shaoshan.bwie.com.shaoshan.R;import shaoshan.bwie.com.shaoshan.activity.fragment.HomePageFragment;import shaoshan.bwie.com.shaoshan.activity.fragment.MapFragment;import shaoshan.bwie.com.shaoshan.activity.fragment.MoreFragment;import shaoshan.bwie.com.shaoshan.activity.fragment.PersonalCenterFragment;import shaoshan.bwie.com.shaoshan.activity.fragment.SeekFragment;

public class HomeActivity extends AppCompatActivity {

private RadioButton home_rb_personalcenter;    private RadioButton home_rb_search;    private RadioButton home_rb_home;    private RadioButton home_rb_map;    private RadioButton home_rb_more;    private RadioGroup home_rg;

@Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_home);        //自动找控件 快捷键  Alt+insert  或 工具中Code——LayoutCreator        initView();

}

private void initView() {        home_rb_personalcenter = (RadioButton) findViewById(R.id.home_rb_personalcenter);        home_rb_search = (RadioButton) findViewById(R.id.home_rb_search);        home_rb_home = (RadioButton) findViewById(R.id.home_rb_home);        home_rb_map = (RadioButton) findViewById(R.id.home_rb_map);        home_rb_more = (RadioButton) findViewById(R.id.home_rb_more);        home_rg = (RadioGroup) findViewById(R.id.home_rg);        //创建Fragment        FragmentManager homePagemanager = getFragmentManager();        FragmentTransaction homePagetransaction = homePagemanager.beginTransaction();        HomePageFragment homePageFragment = new HomePageFragment();        homePagetransaction.replace(R.id.home_frameLayout, homePageFragment, "homePageFragment");        homePagetransaction.commit();        //设置默认选中        home_rb_home.setChecked(true);

//设置RadioGroup的选中监听        home_rg.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {            @Override            public void onCheckedChanged(RadioGroup group, int checkedId) {                switch (group.getCheckedRadioButtonId()) {                    case R.id.home_rb_personalcenter:                        FragmentManager manager = getFragmentManager();                        FragmentTransaction transaction = manager.beginTransaction();                        PersonalCenterFragment personalCenterFragment = new PersonalCenterFragment();                        transaction.replace(R.id.home_frameLayout, personalCenterFragment, "personalCenterFragment");                        transaction.commit();                        break;                    case R.id.home_rb_search:                        FragmentManager seekmanager = getFragmentManager();                        FragmentTransaction seektransaction = seekmanager.beginTransaction();                        SeekFragment seekFragment = new SeekFragment();                        seektransaction.replace(R.id.home_frameLayout, seekFragment, "seekFragment");                        seektransaction.commit();                        break;                    case R.id.home_rb_home:                        FragmentManager homePagemanager = getFragmentManager();                        FragmentTransaction homePagetransaction = homePagemanager.beginTransaction();                        HomePageFragment homePageFragment = new HomePageFragment();                        homePagetransaction.replace(R.id.home_frameLayout, homePageFragment, "homePageFragment");                        homePagetransaction.commit();                        break;                    case R.id.home_rb_map:                        FragmentManager mapmanager = getFragmentManager();                        FragmentTransaction maptransaction = mapmanager.beginTransaction();                        MapFragment mapFragment = new MapFragment();                        maptransaction.replace(R.id.home_frameLayout, mapFragment, "mapFragment");                        maptransaction.commit();                        break;                    case R.id.home_rb_more:                        FragmentManager moremanager = getFragmentManager();                        FragmentTransaction moretransaction = moremanager.beginTransaction();                        MoreFragment moreFragment = new MoreFragment();                        moretransaction.replace(R.id.home_frameLayout, moreFragment, "moreFragment");                        moretransaction.commit();                        break;                }            }        });

}

}

//------------下面这是我的背景选择器------------这只是其中一个，其他四个也类同，在drawable下创建XML文件--------------------

<?xml version="1.0" encoding="utf-8"?><selector xmlns:android="http://schemas.android.com/apk/res/android">

<item android:drawable="@drawable/bt_home" android:state_checked="false"></item>    <item android:drawable="@drawable/bt_home2" android:state_checked="true"></item></selector>

//-------------如下------------------------

注释：其中的几个Fragment我就不写了，很简单，创建一个类继承Fragment，实现onCreateView的方法

如下：这是其中一个

public class MapFragment extends Fragment{    @Nullable    @Override    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {        View view=inflater.inflate(R.layout.map_fragment_item,null);        return view;    }}