安卓开发_慕课网_ViewPager与FragmentPagerAdapter实现Tab实现Tab(App主界面)

时间：2023-03-09 03:44:56
安卓开发_慕课网_ViewPager与FragmentPagerAdapter实现Tab实现Tab(App主界面)

学习内容来自“慕课网”

ViewPager与FragmentPagerAdapter实现Tab 将这两种实现Tab的方法结合起来。效果就是可以拖动内容区域来改变相应的功能图标亮暗

思路：

Fragment作为内容区域

点击功能按钮，想将所有的图标变为暗色图标，再调用相应的Fragment，并使对应的图标变亮

效果图：

安卓开发_慕课网_ViewPager与FragmentPagerAdapter实现Tab实现Tab(App主界面)

布局文件部分

activity_main.xml

 <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"

      >

     <include layout="@layout/top"/>

     <android.support.v4.view.ViewPager   //这里是关键部分

         android:layout_width="fill_parent"

         android:layout_height="0dp"

         android:layout_weight=""

         android:id="@+id/id_viewpager">

     </android.support.v4.view.ViewPager>

     <include layout="@layout/bottom"/>

 </LinearLayout>

activity_main

以下布局文件部分是固定的，和前两种方法用到的是一样的，做过前两种方法的可以直接复制代码

头部部分：

 <?xml version="1.0" encoding="utf-8"?>

 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

     android:layout_width="match_parent"

     android:background="@drawable/title_bar"

     android:layout_height="45dp"

     android:gravity="center"

     android:orientation="vertical" >

     <TextView

         android:layout_height="wrap_content"

         android:layout_width="wrap_content"

         android:layout_gravity="center"

         android:text="微信"

         android:textColor="#ffffff"

         android:textSize="20sp"

         android:textStyle="bold"

         />

 </LinearLayout>

top.xml

底部部分

 <?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="55dp"

     android:background="@drawable/bottom_bar"

     android:orientation="horizontal" >

     <LinearLayout

        android:id="@+id/id_tab_weixin"

        android:layout_width="0dp"

        android:gravity="center"

        android:layout_height="fill_parent"

        android:layout_weight=""

        android:orientation="vertical"

        >

         <ImageButton

            android:id="@+id/id_tab_weixin_image"

            android:layout_width="wrap_content"

            android:layout_height="wrap_content"

            android:src="@drawable/tab_weixin_pressed"

            android:clickable="false"

            android:background="#00000000"

            />

         <TextView

             android:layout_width="wrap_content"

             android:layout_height="wrap_content"

             android:text="微信"

             android:textColor="#ffffff"

             />

     </LinearLayout>

     <LinearLayout

        android:id="@+id/id_tab_add"

        android:layout_width="0dp"

        android:gravity="center"

        android:layout_height="fill_parent"

        android:layout_weight=""

        android:orientation="vertical"

        >

         <ImageButton

            android:id="@+id/id_tab_add_image"

            android:layout_width="wrap_content"

            android:layout_height="wrap_content"

            android:clickable="false"

            android:src="@drawable/tab_address_normal"

            android:background="#00000000"

            />

         <TextView

             android:layout_width="wrap_content"

             android:layout_height="wrap_content"

             android:text="通信录"

             android:textColor="#ffffff"

             />

     </LinearLayout>

    <LinearLayout

        android:id="@+id/id_tab_frd"

        android:layout_width="0dp"

        android:gravity="center"

        android:layout_height="fill_parent"

        android:layout_weight=""

        android:orientation="vertical"

        >

         <ImageButton

            android:id="@+id/id_tab_frd_image"

            android:layout_width="wrap_content"

            android:clickable="false"

            android:layout_height="wrap_content"

            android:src="@drawable/tab_find_frd_normal"

            android:background="#00000000"

            />

         <TextView

             android:layout_width="wrap_content"

             android:layout_height="wrap_content"

             android:text="朋友"

             android:textColor="#ffffff"

             />

     </LinearLayout>

     <LinearLayout

        android:id="@+id/id_tab_set"

        android:layout_width="0dp"

        android:gravity="center"

        android:layout_height="fill_parent"

        android:layout_weight=""

        android:orientation="vertical"

        >

         <ImageButton

            android:id="@+id/id_tab_set_image"

            android:layout_width="wrap_content"

            android:clickable="false"

            android:layout_height="wrap_content"

            android:src="@drawable/tab_settings_normal"

            android:background="#00000000"

            />

         <TextView

             android:layout_width="wrap_content"

             android:layout_height="wrap_content"

             android:text="设置"

             android:textColor="#ffffff"

             />

     </LinearLayout>

 </LinearLayout>

bottom.xml

四个对应fragment部分的布局文件（相似的，只是用来标识效果的文字不同而已）

 <?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:id="@+id/textView1"

         android:layout_width="wrap_content"

         android:layout_height="wrap_content"

         android:layout_gravity="center_horizontal"

         android:text="微信"       //四个 tab_01,tab_01,tab_03,tab_04只是这里显示的文字不同而已

         android:textAppearance="?android:attr/textAppearanceMedium" />

 </LinearLayout>

tab_01

.java文件部分：

主activity

MainActivity.java

 package com.example.tab_three;

 import java.util.ArrayList;

 import java.util.List;

 import android.os.Bundle;

 import android.app.Activity;

 import android.support.v4.app.Fragment;

 import android.support.v4.app.FragmentActivity;

 import android.support.v4.app.FragmentPagerAdapter;

 import android.support.v4.view.ViewPager;

 import android.support.v4.view.ViewPager.OnPageChangeListener;

 import android.view.Menu;

 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 ViewPager mViewPager;

     private FragmentPagerAdapter mAdapter; //ViewPager适配器

     private List<Fragment> mFragments;

     private LinearLayout mTabWeixin;

     private LinearLayout mTabFrd;

     private LinearLayout mTabAdd;

     private LinearLayout mTabSet;

     private ImageButton mImageWeixin;

     private ImageButton mImageFrd;

     private ImageButton mImageAdd;

     private ImageButton mImageSet;

     @Override

     protected void onCreate(Bundle savedInstanceState) {

         super.onCreate(savedInstanceState);

         requestWindowFeature(Window.FEATURE_NO_TITLE);

         setContentView(R.layout.activity_main);

         initView();

         initEvent();

         setSelect();

     }

     private void initEvent() {

         // TODO Auto-generated method stub

         mTabWeixin.setOnClickListener(this);

         mTabAdd.setOnClickListener(this);

         mTabFrd.setOnClickListener(this);

         mTabSet.setOnClickListener(this);

     }

     private void initView() {

         // TODO Auto-generated method stub

         //初始化

         mViewPager = (ViewPager) findViewById(R.id.id_viewpager);

         mTabWeixin = (LinearLayout) findViewById(R.id.id_tab_weixin);

         mTabAdd = (LinearLayout) findViewById(R.id.id_tab_add);

         mTabFrd = (LinearLayout) findViewById(R.id.id_tab_frd);

         mTabSet = (LinearLayout) findViewById(R.id.id_tab_set);

         mImageWeixin = (ImageButton) findViewById(R.id.id_tab_weixin_image);

         mImageAdd = (ImageButton) findViewById(R.id.id_tab_add_image);

         mImageFrd = (ImageButton) findViewById(R.id.id_tab_frd_image);

         mImageSet = (ImageButton) findViewById(R.id.id_tab_set_image);

         //数据的初始化

         mFragments = new ArrayList<Fragment>();

         Fragment mTab_01 = new WeixinFragment();

         Fragment mTab_02 = new AddFragment();

         Fragment mTab_03 = new FrdFragment();

         Fragment mTab_04 = new SetFragment();

         mFragments.add(mTab_01);

         mFragments.add(mTab_02);

         mFragments.add(mTab_03);

         mFragments.add(mTab_04);

         mAdapter = new FragmentPagerAdapter(getSupportFragmentManager())

         {

             @Override

             public int getCount() {

                 // TODO Auto-generated method stub

                 //返回数据源的个数

                 return mFragments.size();

             }

             @Override

             public Fragment getItem(int arg0) {

                 // TODO Auto-generated method stub

                 return mFragments.get(arg0);

             }

         };

         mViewPager.setAdapter(mAdapter);

         //监听内容区域的滑动效果

         mViewPager.setOnPageChangeListener(new OnPageChangeListener() {

             @Override

             public void onPageSelected(int arg0) {

                 // TODO Auto-generated method stub

                 int currentItem  = mViewPager.getCurrentItem();

                 resetImage();

         switch (currentItem) {

         case :

             mImageWeixin.setImageResource(R.drawable.tab_weixin_pressed);

             break;

         case :

             mImageAdd.setImageResource(R.drawable.tab_address_pressed);

             break;

         case :

             mImageFrd.setImageResource(R.drawable.tab_find_frd_pressed);

             break;

         case :

             mImageSet.setImageResource(R.drawable.tab_settings_pressed);

             break;

         default:

             break;

         }

             }

             @Override

             public void onPageScrolled(int arg0, float arg1, int arg2) {

                 // TODO Auto-generated method stub

             }

             @Override

             public void onPageScrollStateChanged(int arg0) {

                 // TODO Auto-generated method stub

             }

         });

         }

     @Override

     public void onClick(View v) {

         // TODO Auto-generated method stub

         //先切换图片至暗色

                 resetImage();

                 switch (v.getId()) {

                 case R.id.id_tab_weixin:

                     setSelect();

                     break;

                 case R.id.id_tab_add:

                     setSelect();

                     break;

                 case R.id.id_tab_frd:

                     setSelect();

                     break;

                 case R.id.id_tab_set:

                     setSelect();

                     break;

                 default:

                     break;

                 }

     }

     private void setSelect(int i) {

         // TODO Auto-generated method stub

         //设置将点击的那个功能图标为亮色

         //切换内容区域

         resetImage();

         switch (i) {

         case :

             mImageWeixin.setImageResource(R.drawable.tab_weixin_pressed);

             break;

         case :

             mImageAdd.setImageResource(R.drawable.tab_address_pressed);

             break;

         case :

             mImageFrd.setImageResource(R.drawable.tab_find_frd_pressed);

             break;

         case :

             mImageSet.setImageResource(R.drawable.tab_settings_pressed);

             break;

         default:

             break;

         }

         mViewPager.setCurrentItem(i);

     }

         //将所有功能图标的界面设为暗色

         private void resetImage() {

             // TODO Auto-generated method stub

             mImageWeixin.setImageResource(R.drawable.tab_weixin_normal);

             mImageAdd.setImageResource(R.drawable.tab_address_normal);

             mImageFrd.setImageResource(R.drawable.tab_find_frd_normal);

             mImageSet.setImageResource(R.drawable.tab_settings_normal);

         }

 }

MainActivity

四个相似的.java文件

WeixinFragment.java

 package com.example.tab_three;

 import android.os.Bundle;

 import android.support.v4.app.Fragment;

 import android.view.LayoutInflater;

 import android.view.View;

 import android.view.ViewGroup;

 public class WeixinFragment extends Fragment{

     @Override

     public View onCreateView(LayoutInflater inflater, ViewGroup container,

             Bundle savedInstanceState) {

         // TODO Auto-generated method stub

         return inflater.inflate(R.layout.tab_1, container,false);

     }

 }

WeixinFragment.java

SetFragment.java

 package com.example.tab_three;

 import android.os.Bundle;

 import android.support.v4.app.Fragment;

 import android.view.LayoutInflater;

 import android.view.View;

 import android.view.ViewGroup;

 public class SetFragment extends Fragment{

     @Override

     public View onCreateView(LayoutInflater inflater, ViewGroup container,

             Bundle savedInstanceState) {

         // TODO Auto-generated method stub

         return inflater.inflate(R.layout.tab_4, container,false);

     }

 }

SetFragment.java

FrdFragment.java

 package com.example.tab_three;

 import android.os.Bundle;

 import android.support.v4.app.Fragment;

 import android.view.LayoutInflater;

 import android.view.View;

 import android.view.ViewGroup;

 public class FrdFragment extends Fragment{

     @Override

     public View onCreateView(LayoutInflater inflater, ViewGroup container,

             Bundle savedInstanceState) {

         // TODO Auto-generated method stub

         return inflater.inflate(R.layout.tab_3, container,false);

     }

 }

FrdFragment.xml

AddFragment.java

 package com.example.tab_three;

 import android.os.Bundle;

 import android.support.v4.app.Fragment;

 import android.view.LayoutInflater;

 import android.view.View;

 import android.view.ViewGroup;

 public class AddFragment extends Fragment{

     @Override

     public View onCreateView(LayoutInflater inflater, ViewGroup container,

             Bundle savedInstanceState) {

         // TODO Auto-generated method stub

         return inflater.inflate(R.layout.tab_2, container,false);

     }

 }

AddFragment.xml

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