Android 中 TabHost与ViewPager结合实现首页导航效果

今天发的是TabHost结合ViewPager实现首页底部导航的效果，虽然说网上有很多这样的Demo，不过呢，我还是要把自己练习写的发出来，没错！就是这么任性；

先上效果图，如下：

代码里面有注释，就不过多解释了，说几点需要注意的问题

1：TabHost 、TabWidget、FrameLayout一定添加id这个属性，否则会报错

Android:id=”@android:id/tabhost”

android:id=”@android:id/tabcontent”

android:id=”@android:id/tabs”

这个属性是固定的。

2：ViewPager的适配器要继承PagerAdapter，别整错咯；

布局文件xml：

<?xml version="1.0" encoding="utf-8"?>
<TabHost xmlns:android="Http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@android:id/tabhost"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.example.wgh.tabhostwithviewpager.MainActivity">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<FrameLayout
android:id="@android:id/tabcontent"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1.0">
<android.support.v4.view.ViewPager
android:id="@+id/viewPager"
android:layout_width="match_parent"
android:layout_height="match_parent"></android.support.v4.view.ViewPager>
</FrameLayout>
<TabWidget
android:id="@android:id/tabs"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="0.0"
android:visibility="Gone" />
<View
android:layout_width="match_parent"
android:layout_height="1dp"
android:background="#0ff0f0" />
<RadioGroup
android:id="@+id/radioGroup"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
<RadioButton
android:id="@+id/radioButton1"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_margin="5dp"
android:layout_weight="1"
android:background="@drawable/img_draw_money_fail"
android:button="@null"
android:paddingLeft="10dp" />
<RadioButton
android:id="@+id/radioButton2"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_margin="5dp"
android:layout_weight="1"
android:background="@drawable/img_draw_money_fail"
android:button="@null" />
<RadioButton
android:id="@+id/radioButton3"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_margin="5dp"
android:layout_weight="1"
android:background="@drawable/img_draw_money_fail"
android:button="@null" />
<RadioButton
android:id="@+id/radioButton4"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_margin="5dp"
android:layout_weight="1"
android:background="@drawable/img_draw_money_fail"
android:button="@null" />
</RadioGroup>
</LinearLayout>
</TabHost>

Activity：

package com.example.wgh.tabhostwithviewpager;
import android.app.TabActivity;
import android.os.Bundle;
import android.support.v4.view.ViewPager;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.RadioButton;
import android.widget.RadioGroup;
import android.widget.TabHost;
import java.util.ArrayList;
public class MainActivity extends TabActivity {
private TabHost tabHost = null;
private ViewPager viewPager = null;
private RadioGroup radioGroup = null;
private ArrayList<View> list = null;
private View view1 = null;
private View view2 = null;
private View view3 = null;
private View view4 = null;
private RadioButton radioButton1 = null;
private RadioButton radioButton2 = null;
private RadioButton radioButton3 = null;
private RadioButton radioButton4 = null;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
initView();
initData();
//设置初始化默认选项
radioGroup.check(R.id.radioButton1);
radioButton1.setBackgroundResource(R.drawable.img_draw_money_success);
viewPager.setCurrentItem(0);
tabHost.setCurrentTab(0);
//getViewPager添加适配器
MyAdapter adapter = new MyAdapter(list);
viewPager.setAdapter(adapter);

viewPager.setOnPageChangeListener(new ViewPager.OnPageChangeListener() {
@Override
public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
}
@Override
public void onPageSelected(int position) {
if (position == 0){
radioButton1.setBackgroundResource(R.drawable.img_draw_money_success);
radioButton2.setBackgroundResource(R.drawable.img_draw_money_fail);
radioButton3.setBackgroundResource(R.drawable.img_draw_money_fail);
radioButton4.setBackgroundResource(R.drawable.img_draw_money_fail);
}else if(position == 1){
radioButton1.setBackgroundResource(R.drawable.img_draw_money_fail);
radioButton2.setBackgroundResource(R.drawable.img_draw_money_success);
radioButton3.setBackgroundResource(R.drawable.img_draw_money_fail);
radioButton4.setBackgroundResource(R.drawable.img_draw_money_fail);
}else if(position == 2){
radioButton1.setBackgroundResource(R.drawable.img_draw_money_fail);
radioButton2.setBackgroundResource(R.drawable.img_draw_money_fail);
radioButton3.setBackgroundResource(R.drawable.img_draw_money_success);
radioButton4.setBackgroundResource(R.drawable.img_draw_money_fail);
}else if(position == 3){
radioButton1.setBackgroundResource(R.drawable.img_draw_money_fail);
radioButton2.setBackgroundResource(R.drawable.img_draw_money_fail);
radioButton3.setBackgroundResource(R.drawable.img_draw_money_fail);
radioButton4.setBackgroundResource(R.drawable.img_draw_money_success);
}
}
@Override
public void onPageScrollStateChanged(int state) {
}
});

radioGroup.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(RadioGroup radioGroup, int checkedId) {
switch (checkedId){
case R.id.radioButton1:
viewPager.setCurrentItem(0);
radioButton1.setBackgroundResource(R.drawable.img_draw_money_success);
radioButton2.setBackgroundResource(R.drawable.img_draw_money_fail);
radioButton3.setBackgroundResource(R.drawable.img_draw_money_fail);
radioButton4.setBackgroundResource(R.drawable.img_draw_money_fail);
break;
case R.id.radioButton2:
viewPager.setCurrentItem(1);
radioButton1.setBackgroundResource(R.drawable.img_draw_money_fail);
radioButton2.setBackgroundResource(R.drawable.img_draw_money_success);
radioButton3.setBackgroundResource(R.drawable.img_draw_money_fail);
radioButton4.setBackgroundResource(R.drawable.img_draw_money_fail);
break;
case R.id.radioButton3:
viewPager.setCurrentItem(2);
radioButton1.setBackgroundResource(R.drawable.img_draw_money_fail);
radioButton2.setBackgroundResource(R.drawable.img_draw_money_fail);
radioButton3.setBackgroundResource(R.drawable.img_draw_money_success);
radioButton4.setBackgroundResource(R.drawable.img_draw_money_fail);
break;
case R.id.radioButton4:
viewPager.setCurrentItem(3);
radioButton1.setBackgroundResource(R.drawable.img_draw_money_fail);
radioButton2.setBackgroundResource(R.drawable.img_draw_money_fail);
radioButton3.setBackgroundResource(R.drawable.img_draw_money_fail);
radioButton4.setBackgroundResource(R.drawable.img_draw_money_success);
break;
}
}
});
}

private void initData() {
list = new ArrayList<View>();
list.add(view1);
list.add(view2);
list.add(view3);
list.add(view4);
}

private void initView() {
tabHost = getTabHost();
viewPager = (ViewPager) findViewById(R.id.viewPager);
radioGroup = (RadioGroup) findViewById(R.id.radioGroup);
radioButton1 = (RadioButton) findViewById(R.id.radioButton1);
radioButton2 = (RadioButton) findViewById(R.id.radioButton2);
radioButton3 = (RadioButton) findViewById(R.id.radioButton3);
radioButton4 = (RadioButton) findViewById(R.id.radioButton4);

LayoutInflater inflater = LayoutInflater.from(this);
view1 = inflater.inflate(R.layout.layout_one,null);
view2 = inflater.inflate(R.layout.layout_two,null);
view3 = inflater.inflate(R.layout.layout_three,null);
view4 = inflater.inflate(R.layout.layout_four,null);
}
}

ViewPager适配器MyAdapter：

public class MyAdapter extends PagerAdapter {
private ArrayList<View> list = null;
public MyAdapter(ArrayList<View> list) {
this.list = list;
}
@Override
public int getCount() {
return list.size();
}
@Override
public boolean isViewFromObject(View arg0, Object arg1) {
return arg0 == arg1;
}
@Override
public Object instantiateItem(ViewGroup container, int position) {
container.addView(list.get(position));
return list.get(position);
}
@Override
public void destroyItem(ViewGroup container, int position, Object object) {
container.removeView(list.get(position));
}
}

以上所述是小编给大家介绍的Android 中 TabHost与ViewPager结合实现首页导航效果，希望对大家有所帮助，如果大家有任何疑问请给我留言，小编会及时回复大家的。在此也非常感谢大家对编程网网站的支持！

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