发布于 2017-10-07 16:24:06 | 60 次阅读 | 评论: 0 | 来源: 网友投递

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Android移动端操作系统

Android是一种基于Linux的自由及开放源代码的操作系统,主要使用于移动设备,如智能手机和平板电脑,由Google公司和开放手机联盟领导及开发。尚未有统一中文名称,中国大陆地区较多人使用“安卓”或“安致”。


这篇文章主要介绍了Android 中 TabHost与ViewPager结合实现首页导航效果,代码简单易懂,感兴趣的朋友参考下吧

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设置滑动监听,根据viewPager选中页的position,设置tabHost页卡选项的样式
*/
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) {
}
});
/**
* 给radioGroup设置监听,以此来改变ViewPager的页面
*/
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;
}
}
});
}
/**
* 初始化数据源
*/
private void initData() {
list = new ArrayList<View>();
list.add(view1);
list.add(view2);
list.add(view3);
list.add(view4);
}
/**
* 初始化控件
*/
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);
/**
* 将每页要展示的layout实例出来,添加到list里面,最后通过适配器return回来要展示的相应的layout
*/
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PHPERZ网站的支持!



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