Android实现京东App分类页面效果

今天群里有人问了关于仿京东App分类页面的实现，而我之前正好查过这方面的资料，手上正好有一个demo，正好分享给大家看看，个人觉得效果棒棒哒！

首先来看效果图吧

是不是很6呢，来分析这个demo的主体构成吧，顶部为搜索栏，左侧是scroview，不要担心优化问题，因为scroview里面的TextView是动态生成的，完全不用担心优化问题，右侧是viewPager，Scroview可以控制viewPager的滑动，反之ViewPager也可以控制scroview的滑动。

闲话少说，直接上代码：

activity_main

<?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" >

<LinearLayout
   android:layout_width="match_parent"
   android:layout_height="52dp"
   android:background="@color/activity_graybg"
   android:baselineAligned="false"
   android:focusable="true"
   android:focusableInTouchMode="true"
   android:orientation="horizontal"
   android:paddingBottom="8dp"
   android:paddingLeft="10dp"
   android:paddingRight="15dp"
   android:paddingTop="8dp" >

<RelativeLayout
     android:id="@+id/search_layout"
     android:layout_width="match_parent"
     android:layout_height="wrap_content"
     android:layout_weight="1"
     >

<EditText
       android:id="@+id/search_edit"
       android:layout_width="match_parent"
       android:layout_height="48dp"
       android:layout_alignParentLeft="true"
       android:layout_centerVertical="true"
       android:layout_marginLeft="3dp"
       android:layout_marginRight="5dp"
       android:layout_toLeftOf="@+id/search_line"
       android:background="@drawable/transparent_edittext_bg"
       android:hint="@string/search_hint"
       android:paddingLeft="@dimen/space_8"
       android:maxLength="50"
       android:singleLine="true"
       android:textColor="@color/black_text_color"
       android:textColorHint="@color/gray_text_color"
       android:textSize="@dimen/text_mid_size" />

<View
       android:id="@+id/search_line"
       android:layout_width="@dimen/yipx"
       android:layout_height="match_parent"
       android:layout_toLeftOf="@+id/search_btn"
       android:background="@color/activity_graybg" />

<ImageView
       android:id="@+id/search_btn"
       android:layout_width="wrap_content"
       android:layout_height="match_parent"
       android:layout_alignParentRight="true"
       android:layout_centerVertical="true"
       android:contentDescription="@null"
       android:src="@drawable/search_btn_bg" />
   </RelativeLayout>

<LinearLayout
     android:layout_width="match_parent"
     android:layout_height="wrap_content"
     android:layout_weight="5"
     android:gravity="center_horizontal" >

<ImageView
       android:id="@+id/type_icon"
       android:layout_width="match_parent"
       android:layout_height="match_parent"
       android:contentDescription="@null"
       android:padding="4dp"
       android:layout_margin="@dimen/space_4"
       android:src="@drawable/barcode_normal"
       android:visibility="visible" />
   </LinearLayout>
 </LinearLayout>

<LinearLayout
   android:layout_width="match_parent"
   android:layout_height="match_parent"
   android:orientation="horizontal" >

<ScrollView
     android:id="@+id/tools_scrlllview"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     android:layout_weight="3"
     android:fadingEdge="none"
     android:scrollbars="none" >

<LinearLayout
       android:id="@+id/tools"
       android:layout_width="match_parent"
       android:layout_height="match_parent"
       android:gravity="center_horizontal"
       android:orientation="vertical" />
   </ScrollView>

<android.support.v4.view.ViewPager
     android:id="@+id/goods_pager"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     android:layout_weight="1" />
 </LinearLayout>

</LinearLayout>

上面是主页面布局，下面放上主页面代码

package up72.com.testtype;

import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;
import android.support.v4.view.ViewPager;
import android.support.v7.app.AppCompatActivity;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.LinearLayout;
import android.widget.ScrollView;
import android.widget.TextView;

public class MainActivity extends AppCompatActivity {

private String toolsList[];
 private TextView toolsTextViews[];
 private View views[];
 private LayoutInflater inflater;
 private ScrollView scrollView;
 private int scrllViewWidth = 0, scrollViewMiddle = 0;
 private ViewPager shop_pager;
 private int currentItem = 0;
 private ShopAdapter shopAdapter;

@Override
 protected void onCreate(Bundle savedInstanceState) {
   super.onCreate(savedInstanceState);
   setContentView(R.layout.activity_main);
   scrollView = (ScrollView) findViewById(R.id.tools_scrlllview);
   shopAdapter = new ShopAdapter(getSupportFragmentManager());
   inflater = LayoutInflater.from(this);
   showToolsView();
   initPager();
 }

/**
  * 动态生成显示items中的textview
  */
 private void showToolsView() {
   toolsList = new String[]{"常用分类", "潮流女装", "品牌男装", "内衣配饰", "家用电器", "手机数码", "电脑办公", "个护化妆", "母婴频道", "食物生鲜", "酒水饮料", "家居家纺", "整车车品", "鞋靴箱包", "运动户外", "图书", "玩具乐器", "钟表", "居家生活", "珠宝饰品", "音像制品", "家具建材", "计生情趣", "营养保健", "奢侈礼品", "生活服务", "旅游出行"};
   LinearLayout toolsLayout = (LinearLayout) findViewById(R.id.tools);
   toolsTextViews = new TextView[toolsList.length];
   views = new View[toolsList.length];

for (int i = 0; i < toolsList.length; i++) {
     View view = inflater.inflate(R.layout.item_b_top_nav_layout, null);
     view.setId(i);
     view.setOnClickListener(toolsItemListener);
     TextView textView = (TextView) view.findViewById(R.id.text);
     textView.setText(toolsList[i]);
     toolsLayout.addView(view);
     toolsTextViews[i] = textView;
     views[i] = view;
   }
   changeTextColor(0);
 }

private View.OnClickListener toolsItemListener = new View.OnClickListener() {
   @Override
   public void onClick(View v) {
     shop_pager.setCurrentItem(v.getId());
   }
 };

/**
  * initPager<br/>
  * 初始化ViewPager控件相关内容
  */
 private void initPager() {
   shop_pager = (ViewPager) findViewById(R.id.goods_pager);
   shop_pager.setAdapter(shopAdapter);
   shop_pager.setOnPageChangeListener(onPageChangeListener);
 }

/**
  * OnPageChangeListener<br/>
  * 监听ViewPager选项卡变化事的事件
  */

private ViewPager.OnPageChangeListener onPageChangeListener = new ViewPager.OnPageChangeListener() {
   @Override
   public void onPageSelected(int arg0) {
     if (shop_pager.getCurrentItem() != arg0) shop_pager.setCurrentItem(arg0);
     if (currentItem != arg0) {
       changeTextColor(arg0);
       changeTextLocation(arg0);
     }
     currentItem = arg0;
   }

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

@Override
   public void onPageScrollStateChanged(int arg0) {
   }
 };

/**
  * ViewPager 加载选项卡
  *
  * @author Administrator
  */
 private class ShopAdapter extends FragmentPagerAdapter {
   public ShopAdapter(FragmentManager fm) {
     super(fm);
   }

@Override
   public Fragment getItem(int arg0) {
     Fragment fragment = new Fragment_pro_type();
     Bundle bundle = new Bundle();
     String str = toolsList[arg0];
     bundle.putString("typename", str);
     fragment.setArguments(bundle);
     return fragment;
   }

@Override
   public int getCount() {
     return toolsList.length;
   }
 }

/**
  * 改变textView的颜色
  *
  * @param id
  */
 private void changeTextColor(int id) {
   for (int i = 0; i < toolsTextViews.length; i++) {
     if (i != id) {
       toolsTextViews[i].setBackgroundResource(android.R.color.transparent);
       toolsTextViews[i].setTextColor(0xff000000);
     }
   }
   toolsTextViews[id].setBackgroundResource(android.R.color.white);
   toolsTextViews[id].setTextColor(0xffff5d5e);
 }

/**
  * 改变栏目位置
  *
  * @param clickPosition
  */
 private void changeTextLocation(int clickPosition) {

int x = (views[clickPosition].getTop() - getScrollViewMiddle() + (getViewheight(views[clickPosition]) / 2));
   scrollView.smoothScrollTo(0, x);
 }

/**
  * 返回scrollview的中间位置
  *
  * @return
  */
 private int getScrollViewMiddle() {
   if (scrollViewMiddle == 0)
     scrollViewMiddle = getScrollViewheight() / 2;
   return scrollViewMiddle;
 }

/**
  * 返回ScrollView的宽度
  *
  * @return
  */
 private int getScrollViewheight() {
   if (scrllViewWidth == 0)
     scrllViewWidth = scrollView.getBottom() - scrollView.getTop();
   return scrllViewWidth;
 }

/**
  * 返回view的宽度
  *
  * @param view
  * @return
  */
 private int getViewheight(View view) {
   return view.getBottom() - view.getTop();
 }
}

在贴上fragment代码

package up72.com.testtype;

import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.GridView;
import android.widget.ImageView;
import android.widget.ProgressBar;
import android.widget.TextView;

import java.util.ArrayList;

public class Fragment_pro_type extends Fragment {
 private ArrayList<Type> list;
 private ImageView hint_img;
 private GridView listView;
 private Pro_type_adapter adapter;
 private Type type;
 private ProgressBar progressBar;
 private String typename;
 @Override
 public View onCreateView(LayoutInflater inflater, ViewGroup container,
     Bundle savedInstanceState) {
   View view = inflater.inflate(R.layout.fragment_pro_type, null);
   progressBar=(ProgressBar) view.findViewById(R.id.progressBar);
   hint_img=(ImageView) view.findViewById(R.id.hint_img);
   listView = (GridView) view.findViewById(R.id.listView);
   typename=getArguments().getString("typename");
   ((TextView)view.findViewById(R.id.toptype)).setText(typename);
   GetTypeList();
   adapter=new Pro_type_adapter(getActivity(), list);
   listView.setAdapter(adapter);
   listView.setOnItemClickListener(new OnItemClickListener() {
     @Override
     public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,long arg3) {

}
   });

return view;
 }

private void GetTypeList() {
   list=new ArrayList<Type>();
   for(int i=1;i<35;i++){
     type=new Type(i, typename+i, "");
     list.add(type);
   }  
   progressBar.setVisibility(View.GONE);
 }
}

fragment布局代码

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
 android:layout_width="fill_parent"
 android:layout_height="fill_parent"
 android:background="@color/activity_bg" >

<TextView
   android:id="@+id/toptype"
   android:layout_width="wrap_content"
   android:layout_height="wrap_content"
   android:layout_alignParentTop="true"
   android:textSize="12sp"
   android:layout_margin="15dp"
   />

<GridView
   android:id="@+id/listView"
   android:layout_width="fill_parent"
   android:layout_height="wrap_content"
   android:layout_centerInParent="true"
   android:numColumns="3"
   android:horizontalSpacing="10dp"
   android:verticalSpacing="10dp"
   android:layout_below="@id/toptype"
   android:scrollbars="none"
    />

<ImageView
   android:id="@+id/hint_img"
   android:layout_width="wrap_content"
   android:layout_height="wrap_content"
   android:layout_centerHorizontal="true"
   android:layout_marginTop="60dp"
   android:contentDescription="@null"
   android:scaleType="centerInside"
   android:visibility="gone" />

<ProgressBar
   android:id="@+id/progressBar"
   style="@android:style/Widget.ProgressBar.Small"
   android:layout_width="wrap_content"
   android:layout_height="wrap_content"
   android:layout_centerInParent="true"
   android:visibility="visible" />

</RelativeLayout>

最后自然是fragment适配器代码啦

package up72.com.testtype;

import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.TextView;

import java.util.ArrayList;

public class Pro_type_adapter extends BaseAdapter {
 private LayoutInflater mInflater;
 private ArrayList<Type> list;
 private Context context;
 private Type type;

public Pro_type_adapter(Context context, ArrayList<Type> list) {
   mInflater = LayoutInflater.from(context);
   this.list = list;
   this.context = context;
 }

@Override
 public int getCount() {
   if (list != null && list.size() > 0)
     return list.size();
   else
     return 0;
 }

@Override
 public Object getItem(int position) {
   return list.get(position);
 }

@Override
 public long getItemId(int position) {
   return 0;
 }

@Override
 public View getView(final int position, View convertView, ViewGroup parent) {
   final MyView view;
   if (convertView == null) {
     view = new MyView();
     convertView = mInflater.inflate(R.layout.list_pro_type_item, null);
     view.icon = (ImageView) convertView.findViewById(R.id.typeicon);
     view.name = (TextView) convertView.findViewById(R.id.typename);
     convertView.setTag(view);
   } else {
     view = (MyView) convertView.getTag();
   }
   if (list != null && list.size() > 0) {
     type = list.get(position);
     view.name.setText(type.getTypename());
     if (type.getTypename().contains("电脑办公")) {
       view.icon.setBackgroundResource(R.drawable.diannao);
     } else if (type.getTypename().contains("个护化妆")) {
       view.icon.setBackgroundResource(R.drawable.huazhuang);
     } else if (type.getTypename().contains("鞋靴箱包")) {
       view.icon.setBackgroundResource(R.drawable.nvxie);
     } else if (type.getTypename().contains("潮流女装")) {
       view.icon.setBackgroundResource(R.drawable.nvzhuang);
     } else if (type.getTypename().contains("图书")) {
       view.icon.setBackgroundResource(R.drawable.shuji);
     } else if (type.getTypename().contains("玩具乐器")) {
       view.icon.setBackgroundResource(R.drawable.wanju);
     } else if (type.getTypename().contains("音像制品")) {
       view.icon.setBackgroundResource(R.drawable.yingshi);
     } else if (type.getTypename().contains("常用分类")) {
       view.icon.setBackgroundResource(R.drawable.yiyong);
     } else if (type.getTypename().contains("品牌男装")) {
       view.icon.setBackgroundResource(R.drawable.nanzhuang);
     } else if (type.getTypename().contains("内衣配饰")) {
       view.icon.setBackgroundResource(R.drawable.neiyi);
     } else if (type.getTypename().contains("家用电器")) {
       view.icon.setBackgroundResource(R.drawable.dianqi);
     } else if (type.getTypename().contains("手机数码")) {
       view.icon.setBackgroundResource(R.drawable.shouji);
     } else {
       view.icon.setBackgroundResource(R.drawable.nvzhuang);
     }
   }

return convertView;
 }

private class MyView {
   private ImageView icon;
   private TextView name;
 }

}

适配器布局代码

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 android:layout_width="fill_parent"
 android:layout_height="fill_parent"
 android:orientation="vertical"
  >

<TextView
   android:id="@+id/text"
   android:layout_width="fill_parent"
   android:layout_height="wrap_content"
   android:paddingBottom="15dp"
   android:paddingTop="15dp"
   android:textColor="@android:color/black"
   android:textSize="@dimen/text_mid_size"
   android:gravity="center"
   />

<ImageView
   android:id="@+id/line"
   android:layout_width="fill_parent"
   android:layout_height="1dp"
   android:background="@color/gray_line_color"
   android:contentDescription="@null"
   android:visibility="visible" />

</LinearLayout>

就这么多了，大家可以直接那去用，效果还是杠杠的。

来源：http://blog.csdn.net/qq_16131393/article/details/50903486