<?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="com.example.cxy.viewpager.MainActivity">  <android.support.v4.view.ViewPager    android:id="@+id/viewPager"    android:layout_width="match_parent"    android:layout_height="0dp"    android:layout_weight="9">  </android.support.v4.view.ViewPager>  <RadioGroup    android:id="@+id/radioGroup"    android:layout_width="match_parent"    android:layout_height="0dp"    android:layout_weight="1"    android:background="#F4F3F3"    android:orientation="horizontal">    <RadioButton      android:id="@+id/radioButton1"      android:layout_width="0dp"      android:layout_height="match_parent"      android:layout_weight="1"      android:button="@null"      android:drawableTop="@drawable/mess_t"      android:gravity="center"      android:text="微信"      android:textColor="#11CD6E"/>    <RadioButton      android:id="@+id/radioButton2"      android:layout_width="0dp"      android:layout_height="match_parent"      android:layout_weight="1"      android:button="@null"      android:drawableTop="@drawable/call_f"      android:gravity="center"      android:text="通訊錄"      android:textColor="@android:color/darker_gray"/>    <RadioButton      android:id="@+id/radioButton3"      android:layout_width="0dp"      android:layout_height="match_parent"      android:layout_weight="1"      android:button="@null"      android:drawableTop="@drawable/show_f"      android:gravity="center"      android:text="發現"      android:textColor="@android:color/darker_gray"/>    <RadioButton      android:id="@+id/radioButton4"      android:layout_width="0dp"      android:layout_height="match_parent"      android:layout_weight="1"      android:button="@null"      android:drawableTop="@drawable/my"      android:gravity="center"      android:text="我"      android:textColor="@android:color/darker_gray"/>  </RadioGroup></LinearLayout>

 package com.example.cxy.viewpager.adapter;import android.support.v4.view.PagerAdapter;import android.view.View;import android.view.ViewGroup;import java.util.List;/** * date:2017/3/7 * Created:陳簫陽(admin) */public class MyViewPagerAdpter extends PagerAdapter {  private List<View> mList;  public MyViewPagerAdpter(List<View> list) {    mList = list;  }  //返回視圖數量  @Override  public int getCount() {    return mList.size();  }  //是否通過對象加載視圖  @Override  public boolean isViewFromObject(View view, Object object) {    return view == object;  }  //加載當前頁面  @Override  public Object instantiateItem(ViewGroup container, int position) {    container.addView(mList.get(position));    return mList.get(position);//View  }  //銷毀滑出視圖  @Override  public void destroyItem(ViewGroup container, int position, Object object) {    container.removeView(mList.get(position));  }}

package com.example.cxy.viewpager.fragment;import android.os.Bundle;import android.support.annotation.Nullable;import android.support.v4.app.Fragment;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import com.example.cxy.viewpager.R;/** * date:2017/3/7 * Created:陳簫陽(admin) */public class OneFragment extends Fragment{  @Nullable  @Override  public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {    View view = inflater.inflate(R.layout.fragmentone, null);    return view;  }}

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"       android:layout_width="match_parent"       android:layout_height="match_parent"       android:orientation="vertical">  <TextView    android:textSize="30sp"    android:id="@+id/textView"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:text="這是微信頁面"/></LinearLayout>

package com.example.cxy.viewpager;import android.os.Bundle;import android.support.v4.view.ViewPager;import android.support.v7.app.AppCompatActivity;import android.view.LayoutInflater;import android.view.View;import android.widget.RadioButton;import android.widget.RadioGroup;import com.example.cxy.viewpager.adapter.MyViewPagerAdpter;import java.util.ArrayList;import java.util.List;public class MainActivity extends AppCompatActivity implements RadioGroup.OnCheckedChangeListener, ViewPager.OnPageChangeListener {  private ViewPager mViewPager;  private List<View> mList;  private RadioGroup mRadioGroup;  private RadioButton weChatBtn, msgBtn, showBtn, myBtn;  @Override  protected void onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    setContentView(R.layout.activity_main);    //初始化所有控件    initView();  }  private void initView() {    //實例化ViewPager    mViewPager = (ViewPager) findViewById(R.id.viewPager);    //實例化Radiogroup    mRadioGroup = (RadioGroup) findViewById(R.id.radioGroup);    //給RadioGroup添加監聽    mRadioGroup.setOnCheckedChangeListener(this);    //實例化RadioButton    weChatBtn = (RadioButton) findViewById(R.id.radioButton1);    msgBtn = (RadioButton) findViewById(R.id.radioButton2);    showBtn = (RadioButton) findViewById(R.id.radioButton3);    myBtn = (RadioButton) findViewById(R.id.radioButton4);    //實例化List數組    mList = new ArrayList<>();    View view1 = LayoutInflater.from(this).inflate(R.layout.fragmentone, null);    View view2 = LayoutInflater.from(this).inflate(R.layout.fragmenttwo, null);    View view3 = LayoutInflater.from(this).inflate(R.layout.fragmentthree, null);    View view4 = LayoutInflater.from(this).inflate(R.layout.fragmentfour, null);    //把生成的每一個View對象添加到集合中    mList.add(view1);    mList.add(view2);    mList.add(view3);    mList.add(view4);    //實例化適配器    MyViewPagerAdpter adapter = new MyViewPagerAdpter(mList);    //給ViewPager添加適配器    mViewPager.setAdapter(adapter);    //給ViewPager添加監聽事件    mViewPager.addOnPageChangeListener(this);  }  @Override  public void onCheckedChanged(RadioGroup group, int checkedId) {    //清理所有導航欄的狀態    clearState();    switch (checkedId) {      case R.id.radioButton1:        //給ViewPager設置當前布局        mViewPager.setCurrentItem(0);        //給RadioButton設置文本顏色        weChatBtn.setTextColor(getResources().getColor(R.color.tvGreen));        //給RadioButton設置文本上方的圖片        weChatBtn.setCompoundDrawablesWithIntrinsicBounds(null, getResources().getDrawable(R.drawable.mess_t), null, null);        break;      case R.id.radioButton2:        mViewPager.setCurrentItem(1);        msgBtn.setTextColor(getResources().getColor(R.color.tvGreen));        msgBtn.setCompoundDrawablesWithIntrinsicBounds(null, getResources().getDrawable(R.drawable.call_t), null, null);        break;      case R.id.radioButton3:        mViewPager.setCurrentItem(2);        showBtn.setTextColor(getResources().getColor(R.color.tvGreen));        showBtn.setCompoundDrawablesWithIntrinsicBounds(null, getResources().getDrawable(R.drawable.show_t), null, null);        break;      case R.id.radioButton4:        mViewPager.setCurrentItem(3);        myBtn.setTextColor(getResources().getColor(R.color.tvGreen));        myBtn.setCompoundDrawablesWithIntrinsicBounds(null, getResources().getDrawable(R.drawable.my_t), null, null);        break;    }  }  //初始化底部導航欄  private void clearState() {    weChatBtn.setTextColor(getResources().getColor(android.R.color.darker_gray));    msgBtn.setTextColor(getResources().getColor(android.R.color.darker_gray));    showBtn.setTextColor(getResources().getColor(android.R.color.darker_gray));    myBtn.setTextColor(getResources().getColor(android.R.color.darker_gray));    weChatBtn.setCompoundDrawablesWithIntrinsicBounds(null, getResources().getDrawable(R.drawable.mess_f), null, null);    msgBtn.setCompoundDrawablesWithIntrinsicBounds(null, getResources().getDrawable(R.drawable.call_f), null, null);    showBtn.setCompoundDrawablesWithIntrinsicBounds(null, getResources().getDrawable(R.drawable.show_f), null, null);    myBtn.setCompoundDrawablesWithIntrinsicBounds(null, getResources().getDrawable(R.drawable.my), null, null);  }  //滑動過程中的動作  @Override  public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {  }  //選擇某個頁面松手后會被調用  @Override  public void onPageSelected(int position) {    //清理所有導航欄的狀態    clearState();    switch (position) {      //使用Switch拿到下標定義當滑動到相應位置小點顯示顏色      case 0:        //當頁面切換后，還要把當前的導航欄變為綠色        weChatBtn.setTextColor(getResources().getColor(R.color.tvGreen));        //設置文本的上方的圖片的，四個參數分別為，左、上、右、下        weChatBtn.setCompoundDrawablesWithIntrinsicBounds(null, getResources().getDrawable(R.drawable.mess_t), null, null);        break;      case 1:        msgBtn.setTextColor(getResources().getColor(R.color.tvGreen));        msgBtn.setCompoundDrawablesWithIntrinsicBounds(null, getResources().getDrawable(R.drawable.call_t), null, null);        break;      case 2:        showBtn.setTextColor(getResources().getColor(R.color.tvGreen));        showBtn.setCompoundDrawablesWithIntrinsicBounds(null, getResources().getDrawable(R.drawable.show_t), null, null);        break;      case 3:        myBtn.setTextColor(getResources().getColor(R.color.tvGreen));        myBtn.setCompoundDrawablesWithIntrinsicBounds(null, getResources().getDrawable(R.drawable.my_t), null, null);        break;    }  }  //手指放上去，松開，拖動都會被調用  @Override  public void onPageScrollStateChanged(int state) {  }}