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;
    }
}