RadioGroup与Viewpager联动
1、布局文件
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent"
android:layout_height="match_parent" tools:context="com.example.app2.MainActivity">
<RadioGroup
android:id="@+id/rg"
android:layout_alignParentBottom="true"
android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<RadioButton
android:layout_width="0dp"
android:text="首页"
android:id="@+id/shouye"
android:background="@drawable/selector"
android:checked="true"
android:gravity="center_horizontal"
android:textSize="20sp"
android:button="@null"
android:layout_height="wrap_content"
android:layout_weight="1"/>
<RadioButton
android:layout_width="0dp"
android:text="资讯"
android:id="@+id/zixun"
android:background="@drawable/selector"
android:gravity="center_horizontal"
android:textSize="20sp"
android:button="@null"
android:layout_height="wrap_content"
android:layout_weight="1"/>
<RadioButton
android:layout_width="0dp"
android:text="发现"
android:id="@+id/faxian"
android:background="@drawable/selector"
android:gravity="center_horizontal"
android:textSize="20sp"
android:button="@null"
android:layout_height="wrap_content"
android:layout_weight="1"/>
<RadioButton
android:layout_width="0dp"
android:text="我的"
android:id="@+id/wode"
android:background="@drawable/selector"
android:gravity="center_horizontal"
android:textSize="20sp"
android:button="@null"
android:layout_height="wrap_content"
android:layout_weight="1"/>
RadioGroup>
<android.support.v4.view.ViewPager
android:id="@+id/vp"
android:layout_above="@id/rg"
android:layout_width="match_parent"
android:layout_height="match_parent">android.support.v4.view.ViewPager>
RelativeLayout>
2、MainActivity的书写
package com.example.app2;
import android.support.annotation.IdRes;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;
import android.support.v4.view.PagerAdapter;
import android.support.v4.view.ViewPager;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.view.ViewGroup;
import android.widget.RadioGroup;
import java.util.ArrayList;
import java.util.List;
public class MainActivity extends AppCompatActivity {
private RadioGroup rg;
private ViewPager vp;
private List list;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
//加载布局
setContentView(R.layout.activity_main);
//添加集合
list = new ArrayList<>();
//添加数据
list.add(new Fragment1());
list.add(new Fragment2());
list.add(new Fragment3());
list.add(new Fragment4());
//找控件
rg = (RadioGroup) findViewById(R.id.rg);
vp = (ViewPager) findViewById(R.id.vp);
//viewpaer一次加载全部页面
vp.setOffscreenPageLimit(list.size());
//设置适配器
vp.setAdapter(new MyAdapter(getSupportFragmentManager()));
//RadioGroup监听事件
rg.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(RadioGroup group, @IdRes int checkedId) {
switch (checkedId){
case R.id.shouye:
vp.setCurrentItem(0);
break;
case R.id.zixun:
vp.setCurrentItem(1);
break;
case R.id.faxian:
vp.setCurrentItem(2);
break;
case R.id.wode:
vp.setCurrentItem(3);
break;
}
}
});
vp.setOnPageChangeListener(new ViewPager.OnPageChangeListener() {
@Override
public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
}
@Override
public void onPageSelected(int position) {
//实现滑动页面下方按钮的联动
rg.check(rg.getChildAt(position).getId());
}
@Override
public void onPageScrollStateChanged(int state) {
}
});
}
//适配器
class MyAdapter extends FragmentPagerAdapter{
public MyAdapter(FragmentManager fm) {
super(fm);
}
@Override
public Fragment getItem(int position) {
return list.get(position);
}
@Override
public int getCount() {
return list.size();
}
}
}
//Tablayout的切换
package com.example.app2;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.design.widget.TabLayout;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;
import android.support.v4.view.ViewPager;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import java.util.ArrayList;
import java.util.List;
/**
* Created by 墨鸦 on 2017/10/17.
*/
public class Fragment1 extends Fragment{
private TabLayout tablayout;
private ViewPager viewpager;
private List datas=new ArrayList<>();
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
//加载布局
View view=View.inflate(getActivity(),R.layout.layout1,null);
//找控件
tablayout = (TabLayout) view.findViewById(R.id.tablayout);
viewpager = (ViewPager) view.findViewById(R.id.viewpager);
//添加数据
datas.add("推荐");
datas.add("要闻");
datas.add("娱乐");
datas.add("科技");
datas.add("汽车");
datas.add("体育");
datas.add("图片");
datas.add("动漫");
datas.add("社会");
datas.add("游戏");
viewpager.setOffscreenPageLimit(datas.size());
//添加适配器
viewpager.setAdapter(new MyAdapter(getActivity().getSupportFragmentManager()));
//进行关联
tablayout.setupWithViewPager(viewpager);
//返回视图
return view;
}
class MyAdapter extends FragmentPagerAdapter {
public MyAdapter(FragmentManager fm) {
super(fm);
}
//返回选项卡
public CharSequence getPageTitle(int position) {
return datas.get(position);
}
@Override
public Fragment getItem(int position) {//创建fragment并返回
Fragment f=null;
switch (position){
case 0:
f=new Fragment_shouye();
break;
default:
Bundle bun=new Bundle();
bun.putString("key",datas.get(position).toString());
Fram fr=new Fram();
fr.setArguments(bun);
return fr;
}
return f;
}
@Override
public int getCount() {//返回选项卡数量
return datas.size();
}
}
}
Bundle传值
//传值
Bundle bun=new Bundle();
bun.putString("key",datas.get(position).toString());
Fragment fr=new Fragment();
fr.setArguments(bun);
//接收
Bundle bun=getArguments();
bun.getString("key");