1.添加三个Fragment
MsgFragment 消息
CCFragment 发现
UserFragment 我
2.添加标签栏(GridView) 用来放置下方的按钮控件
activity_main.xml
1 <?xml version="1.0" encoding="utf-8"?> 2 <LinearLayout 3 xmlns:android="http://schemas.android.com/apk/res/android" 4 xmlns:app="http://schemas.android.com/apk/res-auto" 5 xmlns:tools="http://schemas.android.com/tools" 6 android:layout_width="match_parent" 7 android:layout_height="match_parent" 8 tools:context="com.example.senior0302_test2.MainActivity" 9 android:orientation="vertical"> 10 11 12 <view 13 android:id="@+id/id_viewpager" 14 class="android.support.v4.view.ViewPager" 15 android:layout_weight="1" 16 android:layout_width="match_parent" 17 android:layout_height="0dp"/> 18 19 <!--中间的分割线--> 20 <View android:layout_width="match_parent" 21 android:layout_height="1dp" 22 android:background="#ccc" /> 23 24 25 <GridView 26 android:id="@+id/id_gridview" 27 android:layout_width="match_parent" 28 android:layout_height="wrap_content"/> 29 </LinearLayout>
3.构造类AfTabBarAdapter.java 该类继承于BaseAdapter
AfTabBarAdapter.java
1 package example.senior0301;
2
3 import android.content.Context;
4 import android.graphics.Color;
5 import android.graphics.drawable.Drawable;
6 import android.view.LayoutInflater;
7 import android.view.View;
8 import android.view.ViewGroup;
9 import android.widget.BaseAdapter;
10 import android.widget.ImageView;
11 import android.widget.TextView;
12
13 import java.util.ArrayList;
14
15 /**
16 * Created by shaofa on 2017/12/9.
17 */
18
19 public class AfTabBarAdapter extends BaseAdapter
20 {
21 Context context;
22 LayoutInflater inflater;
23
24 // 颜色也字体
25 int colorNormal = Color.argb(0xFF, 0x44, 0x44, 0x44);
26 int colorActive = Color.argb(0xFF, 0x00, 0xFF, 0x00);
27
28 // 标签项数据
29 ArrayList<Item> listData = new ArrayList();
30
31 public AfTabBarAdapter(Context context)
32 {
33 this.context = context;
34 this.inflater = LayoutInflater.from(context);
35 }
36
37 // 添加一项数据
38 public void addItem(Item it)
39 {
40 listData.add(it);
41 }
42 // 添加多项数据
43 public void addItems(Item[] items)
44 {
45 for(Item it:items) listData.add(it);
46 }
47 // 当一个项被选中时 图片跟标签的样式
48 public void setActive(int position, boolean update)
49 {
50 //遍历看一共有几个标签按钮
51 for(int i=0; i<listData.size(); i++)
52 {
53 //获取每个按钮
54 Item it = listData.get(i);
55
56 //如果遍历道的按钮跟所点击或移动的一样 则设置相应的值
57 if(i == position)
58 it.active = true;
59 else
60 it.active = false;
61 }
62 if(update) notifyDataSetChanged();
63 }
64
65 @Override
66 public int getCount()
67 {
68 return listData.size();
69 }
70
71 @Override
72 public Object getItem(int position)
73 {
74 return listData.get(position);
75 }
76
77 @Override
78 public long getItemId(int position)
79 {
80 return position;
81 }
82
83 @Override
84 public View getView(int position, View convertView, ViewGroup parent)
85 {
86 // 创建控件
87 if (convertView == null)
88 {
89 convertView = inflater.inflate(R.layout.af_tab_bar_item, parent, false);
90 }
91
92 // 获取/显示数据
93 Item it = (Item) getItem(position);
94 TextView label = (TextView) convertView.findViewById(R.id.id_tabbar_label);
95 ImageView imageView = (ImageView) convertView.findViewById(R.id.id_tabbar_icon);
96
97 label.setText( it.label);
98
99 if (it.active)
100 {
101 // 选中状态
102 if (it.label.length() > 0)
103 label.setTextColor(colorActive);
104 if (it.iconActive != null)
105 imageView.setImageDrawable( it.iconActive);
106 else // iconActive未设置,则显示iconNormal 如果没有放置图片时
107 imageView.setImageDrawable( it.iconNormal);
108 } else
109 {
110 // 普通状态
111 if (it.label.length() > 0)
112 label.setTextColor(colorNormal);
113 if (it.iconNormal != null)
114 imageView.setImageDrawable( it.iconNormal);
115 }
116
117 return convertView;
118 }
119
120 ///////////////////////////////
121 public static class Item
122 {
123 String label; // 标签显示
124 String value; // 关联的数据
125 public Drawable iconNormal; // 图标
126 public Drawable iconActive; // 选中高亮
127 public boolean active = false; // 是否选中状态
128
129 public Item()
130 {
131 }
132
133 public Item(String label, String value)
134 {
135 this.label = label;
136 this.value = value;
137 }
138 public Item(String label, String value, Drawable iconNormal, Drawable iconActive)
139 {
140 this.label = label;
141 this.value = value;
142 this.iconNormal = iconNormal;
143 this.iconActive = iconActive;
144 }
145 }
146 }
4.MainActivity.java中
a.创建一个Fragment的数组 页面数组
Fragment[] fragments = new Fragment[3];
b.初始化三个创建的页面
fragments[0] = new MsgFragment();
fragments[1] = new CCFragment();
fragments[2] = new UserFragment();
c.创建内部类 MyViewPagerAdapter
public class MyViewPagerAdapter extends FragmentPagerAdapter
{
public MyViewPagerAdapter(FragmentManager fm) {
super(fm);
}
@Override
public Fragment getItem(int position) {
//?????????
return fragments[position];
}
@Override
public int getCount() {
//?????????
return fragments.length;
}
}
d.给viewPage 设置Adapter
1 FragmentPagerAdapter pagerAdapter = new MyViewPagerAdapter(getSupportFragmentManager()); 2 final ViewPager viewPager=(ViewPager)findViewById(R.id.id_viewpager); 3 viewPager.setAdapter(pagerAdapter);
e.设置标签栏中的内容
1 AfTabBarAdapter.Item[] labels=new AfTabBarAdapter.Item[3];
2 labels[0]=new AfTabBarAdapter.Item("微信","msg",getDrawable(R.drawable.ic_msg_active),getDrawable(R.drawable.ic_msg_normal));
3 labels[1]=new AfTabBarAdapter.Item("发现","cc",getDrawable(R.drawable.ic_find_active),getDrawable(R.drawable.ic_find_normal));
4 labels[2]=new AfTabBarAdapter.Item("我的","user",getDrawable(R.drawable.ic_user_active),getDrawable(R.drawable.ic_user_normal));
tabAdapter=new AfTabBarAdapter(this);tabAdapter.addItems(labels);
f.给标签栏的主体 GridView设置Adapter
GridView gridView=(GridView)findViewById(R.id.id_gridview);
gridView.setAdapter(tabAdapter);
gridView.setNumColumns(labels.length);//GridView设置 列
tabAdapter.setActive(0,true);//默认选中第一页 第一个标签
g.监听器：点击标签页 显示相应的页面
gridView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> adapterView, View view, int position, long l) {
//让pagerVier切换到相应的页面
viewPager.setCurrentItem(position);
//让标签按钮改变选相应的样式
tabAdapter.setActive(position,true);
}
});
h.监听器：当滑动上方页面时
viewPager.addOnPageChangeListener(new ViewPager.OnPageChangeListener() {
@Override
public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
}
@Override
public void onPageSelected(int position) {
//让标签栏该改变相应的样式
tabAdapter.setActive(position,true);
}
@Override
public void onPageScrollStateChanged(int state) {
}
});
MainActivity.java
1 package com.example.senior0302_test2;
2
3 import android.os.Bundle;
4 import android.support.v4.app.Fragment;
5 import android.support.v4.app.FragmentManager;
6 import android.support.v4.app.FragmentPagerAdapter;
7 import android.support.v4.view.ViewPager;
8 import android.support.v7.app.AppCompatActivity;
9 import android.view.View;
10 import android.widget.AdapterView;
11 import android.widget.GridView;
12
13 public class MainActivity extends AppCompatActivity {
14
15 Fragment[] fragments = new Fragment[3];
16 AfTabBarAdapter tabAdapter;
17
18
19 @Override
20 protected void onCreate(Bundle savedInstanceState) {
21 super.onCreate(savedInstanceState);
22 setContentView(R.layout.activity_main);
23
24 //将页面初始化
25 fragments[0] = new MsgFragment();
26 fragments[1] = new CCFragment();
27 fragments[2] = new UserFragment();
28
29 FragmentPagerAdapter pagerAdapter = new MyViewPagerAdapter(getSupportFragmentManager());
30 final ViewPager viewPager=(ViewPager)findViewById(R.id.id_viewpager);
31 viewPager.setAdapter(pagerAdapter);
32
33 //设置标签栏中的内容
34 AfTabBarAdapter.Item[] labels=new AfTabBarAdapter.Item[3];
35 labels[0]=new AfTabBarAdapter.Item("微信","msg",getDrawable(R.drawable.ic_msg_active),getDrawable(R.drawable.ic_msg_normal));
36 labels[1]=new AfTabBarAdapter.Item("发现","cc",getDrawable(R.drawable.ic_find_active),getDrawable(R.drawable.ic_find_normal));
37 labels[2]=new AfTabBarAdapter.Item("我的","user",getDrawable(R.drawable.ic_user_active),getDrawable(R.drawable.ic_user_normal));
38
39 tabAdapter=new AfTabBarAdapter(this);
40 tabAdapter.addItems(labels);
41
42 GridView gridView=(GridView)findViewById(R.id.id_gridview);
43 gridView.setAdapter(tabAdapter);
44 gridView.setNumColumns(labels.length);//GridView设置 列
45 tabAdapter.setActive(0,true);//默认选中第一页 第一个标签
46
47 //监听器：点击标签页 显示相应的页面
48 gridView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
49 @Override
50 public void onItemClick(AdapterView<?> adapterView, View view, int position, long l) {
51
52 //让pagerVier切换到相应的页面
53 viewPager.setCurrentItem(position);
54
55 //让标签按钮改变选相应的样式
56 tabAdapter.setActive(position,true);
57 }
58 });
59
60 //监听器：当滑动上方页面时
61 viewPager.addOnPageChangeListener(new ViewPager.OnPageChangeListener() {
62 @Override
63 public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
64
65 }
66
67 @Override
68 public void onPageSelected(int position) {
69
70 //让标签栏该改变相应的样式
71 tabAdapter.setActive(position,true);
72 }
73
74 @Override
75 public void onPageScrollStateChanged(int state) {
76
77 }
78 });
79 }
80
81 public class MyViewPagerAdapter extends FragmentPagerAdapter
82 {
83
84 public MyViewPagerAdapter(FragmentManager fm) {
85 super(fm);
86 }
87
88 @Override
89 public Fragment getItem(int position) {
90 //?????????
91 return fragments[position];
92
93 }
94
95 @Override
96 public int getCount() {
97 //?????????
98 return fragments.length;
99 }
100 }
101 }
原文地址：https://www.cnblogs.com/Doaoao/p/9420615.html
时间： 2024-10-17 00:36:10