Anne Han

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Android Studio 使用ViewPager + Fragment实现滑动菜单Tab效果 --简易版

描述:

        之前有做过一个记账本APP,拿来练手的,做的很简单,是用Eclipse开发的;

        最近想把这个APP重新完善一下,添加了一些新的功能,并选用Android Studio来开发;

        APP已经完善了一部分,现在就想把已经做好的功能整理一下,记录下来。

 

效果图:

        可以手动滑动菜单

        也可以通过点击头部菜单进行切换

                 

 

源码:

        https://github.com/AnneHan/slidingMenu

 

具体实现的代码:

        前台代码(activity_main.xml):

 1 <?xml version="1.0" encoding="utf-8"?>
 2 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 3     android:layout_width="match_parent"
 4     android:layout_height="match_parent"
 5     android:orientation="vertical">
 6 
 7     <LinearLayout
 8         android:layout_width="match_parent"
 9         android:layout_height="40dp"
10         android:layout_marginTop="1dp"
11         android:background="@android:color/white"
12         android:baselineAligned="false"
13         android:gravity="center_vertical"
14         android:orientation="horizontal"
15         android:paddingBottom="5dp"
16         android:paddingTop="5dp">
17 
18         <!--detail Tab-->
19         <TextView
20             android:id="@+id/item_detail"
21             android:layout_width="0dp"
22             android:layout_height="match_parent"
23             android:layout_weight="1"
24             android:gravity="center_horizontal|center_vertical"
25             android:text="@string/detail_tab"
26             android:textColor="@color/main_tab_text_color"
27             android:textSize="20dp"/>
28 
29         <!--category report Tab-->
30         <TextView
31             android:id="@+id/item_category_report"
32             android:layout_width="0dp"
33             android:layout_height="match_parent"
34             android:layout_weight="1"
35             android:gravity="center_horizontal|center_vertical"
36             android:text="@string/category_report_tab"
37             android:textColor="@color/main_tab_text_color"
38             android:textSize="20dp"/>
39     </LinearLayout>
40 
41     <android.support.v4.view.ViewPager
42         android:id="@+id/mainViewPager"
43         android:layout_width="match_parent"
44         android:layout_height="0dp"
45         android:layout_weight="1"/>
46 </LinearLayout>
View Code

 

        主界面代码(MainActivity.java):

  1 package com.hyl.acccountbookdemo;
  2 
  3 import android.graphics.Color;
  4 import android.os.Bundle;
  5 import android.support.v4.app.Fragment;
  6 import android.support.v4.app.FragmentManager;
  7 import android.support.v4.app.FragmentPagerAdapter;
  8 import android.support.v4.view.ViewPager;
  9 import android.support.v7.app.AppCompatActivity;
 10 import android.view.View;
 11 import android.widget.TextView;
 12 
 13 import java.util.ArrayList;
 14 import java.util.List;
 15 
 16 /**
 17  * @programName: MainActivity.java
 18  * @programFunction: Recording of income and expenditure
 19  * @createDate: 2018/09/25
 20  * @author: AnneHan
 21  * @version:
 22  * xx.   yyyy/mm/dd   ver    author    comments
 23  * 01.   2018/09/25   1.00   AnneHan   New Create
 24  */
 25 public class MainActivity extends AppCompatActivity implements View.OnClickListener {
 26     private TextView item_detail, item_category_report;
 27     private ViewPager vp;
 28     private OneFragment oneFragment;
 29     private TwoFragment twoFragment;
 30     private List<Fragment> mFragmentList = new ArrayList<Fragment>();
 31     private FragmentAdapter mFragmentAdapter;
 32 
 33     @Override
 34     protected void onCreate(Bundle savedInstanceState) {
 35         super.onCreate(savedInstanceState);
 36         setContentView(R.layout.activity_main);
 37 
 38         initViews();
 39 
 40         mFragmentAdapter = new FragmentAdapter(this.getSupportFragmentManager(), mFragmentList);
 41         vp.setOffscreenPageLimit(2);//ViewPager的缓存为2帧
 42         vp.setAdapter(mFragmentAdapter);
 43         vp.setCurrentItem(0);//初始设置ViewPager选中第一帧
 44         item_detail.setTextColor(Color.parseColor("#1ba0e1"));
 45 
 46         //ViewPager的监听事件
 47         vp.setOnPageChangeListener(new ViewPager.OnPageChangeListener() {
 48             @Override
 49             public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
 50 
 51             }
 52 
 53             @Override
 54             public void onPageSelected(int position) {
 55                 /*此方法在页面被选中时调用*/
 56                 changeTextColor(position);
 57             }
 58 
 59             @Override
 60             public void onPageScrollStateChanged(int state) {
 61                 /*此方法是在状态改变的时候调用,其中arg0这个参数有三种状态(0,1,2)。
 62                 arg0==1的时辰默示正在滑动,
 63                 arg0==2的时辰默示滑动完毕了,
 64                 arg0==0的时辰默示什么都没做。*/
 65             }
 66         });
 67     }
 68 
 69     /**
 70      * 初始化布局View
 71      */
 72     private void initViews() {
 73         item_detail = (TextView) findViewById(R.id.item_detail);
 74         item_category_report = (TextView) findViewById(R.id.item_category_report);
 75 
 76         item_detail.setOnClickListener(this);
 77         item_category_report.setOnClickListener(this);
 78 
 79         vp = (ViewPager) findViewById(R.id.mainViewPager);
 80         oneFragment = new OneFragment();
 81         twoFragment = new TwoFragment();
 82         //给FragmentList添加数据
 83         mFragmentList.add(oneFragment);
 84         mFragmentList.add(twoFragment);
 85     }
 86 
 87     /**
 88      * 点击头部Text 动态修改ViewPager的内容
 89      */
 90     @Override
 91     public void onClick(View v) {
 92         switch (v.getId()) {
 93             case R.id.item_detail:
 94                 vp.setCurrentItem(0, true);
 95                 break;
 96             case R.id.item_category_report:
 97                 vp.setCurrentItem(1, true);
 98                 break;
 99         }
100     }
101 
102     public class FragmentAdapter extends FragmentPagerAdapter {
103 
104         List<Fragment> fragmentList = new ArrayList<Fragment>();
105 
106         public FragmentAdapter(FragmentManager fm, List<Fragment> fragmentList) {
107             super(fm);
108             this.fragmentList = fragmentList;
109         }
110 
111         @Override
112         public Fragment getItem(int position) {
113             return fragmentList.get(position);
114         }
115 
116         @Override
117         public int getCount() {
118             return fragmentList.size();
119         }
120 
121     }
122 
123     /**
124      * 由ViewPager的滑动修改头部导航Text的颜色
125      * @param position
126      */
127     private void changeTextColor(int position) {
128         if (position == 0) {
129             item_detail.setTextColor(Color.parseColor("#1ba0e1"));
130             item_category_report.setTextColor(Color.parseColor("#000000"));
131         } else if (position == 1) {
132             item_category_report.setTextColor(Color.parseColor("#1ba0e1"));
133             item_detail.setTextColor(Color.parseColor("#000000"));
134         }
135     }
136 }
View Code

 

        需要多少个Fragment,便创建多少个,这里只举例写一个,其它相同

        建立Fragment(fragment_one.xml):

 1 <?xml version="1.0" encoding="utf-8"?>
 2 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 3     android:layout_width="match_parent"
 4     android:layout_height="match_parent">
 5 
 6     <TextView
 7         android:layout_width="wrap_content"
 8         android:layout_height="wrap_content"
 9         android:layout_gravity="center"
10         android:text="@string/detail_tab"
11         android:textSize="25sp"/>
12 
13 </LinearLayout>
View Code

 

        Fragment界面代码(OneFragment.java):

 1 package com.hyl.acccountbookdemo;
 2 
 3 import android.os.Bundle;
 4 import android.support.v4.app.Fragment;
 5 import android.view.LayoutInflater;
 6 import android.view.View;
 7 import android.view.ViewGroup;
 8 
 9 /**
10  * @programName: OneFragment.java
11  * @programFunction:
12  * @createDate: 2018/09/25
13  * @author: AnneHan
14  * @version:
15  * xx.   yyyy/mm/dd   ver    author    comments
16  * 01.   2018/09/25   1.00   AnneHan   New Create
17  */
18 public class OneFragment extends Fragment {
19     @Override
20     public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
21         // Inflate the layout for this fragment
22         return inflater.inflate(R.layout.fragment_one, container, false);
23     }
24 }
View Code

 

        strings.xml:

<string name="detail_tab">明细</string>
<string name="category_report_tab">类别报表</string>

 

        colors.xml:

<color name="main_tab_text_color">#000000</color>

 

posted @ 2018-09-25 18:42 AnneHan 阅读(...) 评论(...) 编辑 收藏