首先我们需要在主布局文件中 放一个 容器，方便让fragment加入进去,我们创建了四个Fragment，并用RedioButton实现了导航栏
MainActivity.java
1 package com.example.administrator.fragmentdemo;
2
3 import android.app.Activity;
4 import android.app.FragmentManager;
5 import android.app.FragmentTransaction;
6 import android.os.Bundle;
7 import android.view.View;
8 import android.widget.RadioButton;
9
10
11 public class MainActivity extends Activity implements View.OnClickListener {
12
13 private RadioButton image1;
14 private RadioButton image2;
15 private RadioButton image3;
16 private RadioButton image4;
17
18 private FirstFragment firstFragment;
19 private SecondFragment secondFragment;
20 private ThirdFragment thirdFragment;
21 private FourFragment fourFragment;
22
23 @Override
24 protected void onCreate(Bundle savedInstanceState) {
25 super.onCreate(savedInstanceState);
26 setContentView(R.layout.activity_main);
27
28 initViews();
29 initEvents();
30 //首先 我们先选定一个
31 select(0);
32 }
33 //初始化 各种个 View
34 private void initViews(){
35 image1 = (RadioButton) findViewById(R.id.tab_image1);
36 image2 = (RadioButton) findViewById(R.id.tab_image2);
37 image3 = (RadioButton) findViewById(R.id.tab_image3);
38 image4 = (RadioButton) findViewById(R.id.tab_image4);
39 }
40 //初始化 监听事件
41 private void initEvents(){
42 image1.setOnClickListener(this);
43 image2.setOnClickListener(this);
44 image3.setOnClickListener(this);
45 image4.setOnClickListener(this);
46 }
47 // 初始化 各种图片
48 private void initImageBack(){
49 image1.setBackgroundResource(R.drawable.chatting_biaoqing_btn_normal);
50 image2.setBackgroundResource(R.drawable.lbs_icon_disable);
51 image3.setBackgroundResource(R.drawable.scan_book);
52 image4.setBackgroundResource(R.drawable.scan_word);
53 }
54 //
55 private void select(int i){
56 FragmentManager fm = getFragmentManager(); //获得Fragment管理器
57 FragmentTransaction ft = fm.beginTransaction(); //开启一个事务
58
59 hidtFragment(ft); //先隐藏 Fragment
60
61 switch (i){
62 case 0:
63 image1.setBackgroundResource(R.drawable.chatting_biaoqing_btn_enable);
64 if (firstFragment == null){
65 firstFragment = new FirstFragment();
66 ft.add(R.id.fragment_container,firstFragment);
67 }else{
68 ft.show(firstFragment);
69 }
70 break;
71 case 1:
72 image2.setBackgroundResource(R.drawable.lbs_icon_enable);
73 if (secondFragment == null){
74 secondFragment = new SecondFragment();
75 ft.add(R.id.fragment_container,secondFragment);
76 }else {
77 ft.show(secondFragment);
78 }
79 break;
80 case 2:
81 image3.setBackgroundResource(R.drawable.scan_book_hl);
82 if (thirdFragment == null){
83 thirdFragment = new ThirdFragment();
84 ft.add(R.id.fragment_container,thirdFragment);
85 }else {
86 ft.show(thirdFragment);
87 }
88 break;
89 case 3:
90 image4.setBackgroundResource(R.drawable.scan_word_hl);
91 if(fourFragment == null){
92 fourFragment = new FourFragment();
93 ft.add(R.id.fragment_container,fourFragment);
94 }else {
95 ft.show(fourFragment);
96 }
97 break;
98 }
99 ft.commit(); //提交事务
100 }
101 //隐藏所有Fragment
102 private void hidtFragment(FragmentTransaction fragmentTransaction){
103 if (firstFragment != null){
104 fragmentTransaction.hide(firstFragment);
105 }
106 if (secondFragment != null){
107 fragmentTransaction.hide(secondFragment);
108 }
109 if (thirdFragment != null){
110 fragmentTransaction.hide(thirdFragment);
111 }
112 if (fourFragment != null){
113 fragmentTransaction.hide(fourFragment);
114 }
115 }
116 //重写监听
117 @Override
118 public void onClick(View v) {
119
120 initImageBack(); //初始化 图片背景
121
122 switch (v.getId()){
123 case R.id.tab_image1:
124 select(0);
125 break;
126 case R.id.tab_image2:
127 select(1);
128 break;
129 case R.id.tab_image3:
130 select(2);
131 break;
132 case R.id.tab_image4:
133 select(3);
134 break;
135 }
136 }
137 }
主布局文件,在这里我分开写的，底部的导航栏有新建了一个xml文件，并在主布局文件中用include将他包含进来。
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"
tools:context=".MainActivity">
<ImageView
android:layout_width="match_parent"
android:layout_height="40dp"
android:background="@drawable/friendactivity_comment_frame_pressed"/>
<FrameLayout
android:id="@+id/fragment_container"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1">
</FrameLayout>
<include layout="@layout/activity_main_tab_view"/>
</LinearLayout>
底部导航栏的布局文件
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="50dp"
android:layout_gravity="bottom"
android:background="@drawable/friendactivity_comment_frame_pressed">
<RadioGroup
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal">
<RadioButton
android:id="@+id/tab_image1"
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1"
android:button="@null"
android:background="@drawable/chatting_biaoqing_btn_normal"/>
<RadioButton
android:id="@+id/tab_image2"
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1"
android:button="@null"
android:background="@drawable/lbs_icon_disable"/>
<RadioButton
android:id="@+id/tab_image3"
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1"
android:button="@null"
android:background="@drawable/scan_book"/>
<RadioButton
android:id="@+id/tab_image4"
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1"
android:button="@null"
android:background="@drawable/scan_word"/>
</RadioGroup>
</LinearLayout>
四个fragment都一样，我就放一个代码，布局也很简单，就放了一个TextView
Fragment.java
package com.example.administrator.fragmentdemo;
import android.app.Fragment;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
/**
* Created by Administrator on 2015/9/3.
*/
public class FirstFragment extends Fragment {
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
return inflater.inflate(R.layout.first_fragment_view,container,false);
}
}
该fragment的布局文件为:
<?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:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="This is frist fragment"/>
</LinearLayout>
效果图:
时间： 2024-10-10 09:10:41