布局
pager_fragment.xml
<RelativeLayout 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"
tools:context=".MainActivity">
<RelativeLayout
android:id="@+id/ly_top_bar"
android:layout_width="match_parent"
android:layout_height="48dp"
>
<TextView
android:id="@+id/topBar"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_centerInParent="true"
android:gravity="center"
android:textSize="18sp"
android:textColor="#000"
android:text="信息"/>
<View
android:layout_width="match_parent"
android:layout_height="2px"
android:background="#C0C0C0"
android:layout_alignParentBottom="true"/>
</RelativeLayout>
<RadioGroup
android:id="@+id/rg_tab_bar"
android:layout_width="match_parent"
android:layout_height="56dp"
android:layout_alignParentBottom="true"
android:background="#C0C0C0"
android:orientation="horizontal">
<!--android:button="@null" 去除RadioButton自带圆圈-->
<RadioButton
android:button="@null"
android:id="@+id/rb_channel"
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1"
android:background="#FFF"
android:drawablePadding="3dp"
android:drawableTop="@drawable/tab_menu_channel"
android:gravity="center"
android:padding="5dp"
android:text="提醒"
android:textColor="@drawable/tab_menu_text"
android:textSize="16sp" />
<RadioButton
android:button="@null"
android:id="@+id/rb_message"
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1"
android:background="#FFF"
android:drawablePadding="3dp"
android:drawableTop="@drawable/tab_menu_message"
android:gravity="center"
android:padding="5dp"
android:text="消息"
android:textColor="@drawable/tab_menu_text"
android:textSize="16sp" />
<RadioButton
android:button="@null"
android:id="@+id/rb_better"
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1"
android:background="#FFF"
android:drawablePadding="3dp"
android:drawableTop="@drawable/tab_menu_better"
android:gravity="center"
android:padding="5dp"
android:text="我的"
android:textColor="@drawable/tab_menu_text"
android:textSize="16sp" />
<RadioButton
android:button="@null"
android:id="@+id/rb_setting"
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1"
android:background="#FFF"
android:drawablePadding="3dp"
android:drawableTop="@drawable/tab_menu_setting"
android:gravity="center"
android:padding="5dp"
android:text="设置"
android:textColor="@drawable/tab_menu_text"
android:textSize="16sp"/>
</RadioGroup>
<View
android:id="@+id/div_tab_bar"
android:layout_width="match_parent"
android:layout_height="2px"
android:background="#FFF"
android:layout_above="@id/rg_tab_bar"/>
<!-- RelativeLayout布局中的
layout_above 将控件置于给定id控件之上
layout_below 将控件置于给定id控件之下
-->
<android.support.v4.view.ViewPager
android:background="#D3D3D3"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_below="@id/ly_top_bar"
android:layout_above="@id/div_tab_bar"
android:id="@+id/vp_content"/>
</RelativeLayout>
MyFragment类和fg_content.xml就不贴了，沿用上篇文章的
MainActivity类
package com.demo;
import android.content.Intent;
import android.os.Build;
import android.support.annotation.NonNull;
import android.support.annotation.RequiresApi;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentTransaction;
import android.support.v4.view.ViewPager;
import android.support.v4.widget.DrawerLayout;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.DisplayMetrics;
import android.util.Log;
import android.view.*;
import android.widget.*;
import java.util.ArrayList;
public class MainActivity extends AppCompatActivity implements View.OnClickListener,
ViewPager.OnPageChangeListener,RadioGroup.OnCheckedChangeListener{
private RadioGroup rg_tab_bar;
private RadioButton rb_channel;
private RadioButton rb_message;
private RadioButton rb_better;
private RadioButton rb_setting;
private ViewPager viewPager;
//几个代表页面的常量
public static final int PAGE_ONE = 0;
public static final int PAGE_TWO = 1;
public static final int PAGE_THREE = 2;
public static final int PAGE_FOUR = 3;
private MyFragmentPagerAdapter mAdapter;
@RequiresApi(api = Build.VERSION_CODES.JELLY_BEAN)
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.pager_fragment);
// init();
mAdapter = new MyFragmentPagerAdapter(getSupportFragmentManager());
bindViews();
rb_channel.setChecked(true);
}
private void bindViews() {
rg_tab_bar = findViewById(R.id.rg_tab_bar);
rb_channel = findViewById(R.id.rb_channel);
rb_message =findViewById(R.id.rb_message);
rb_better = findViewById(R.id.rb_better);
rb_setting = findViewById(R.id.rb_setting);
//将radioGroup添加到点击事件
rg_tab_bar.setOnCheckedChangeListener(this);
viewPager = findViewById(R.id.vp_content);
//将fragmentManager添加到viewpager
viewPager.setAdapter(mAdapter);
viewPager.setCurrentItem(0);
viewPager.addOnPageChangeListener(this);
}
@Override
public void onPageScrolled(int i, float v, int i1) {
}
@Override
public void onPageSelected(int i) {
}
@Override
public void onPageScrollStateChanged(int state) {
//state的状态有三个，0表示什么都没做，1正在滑动，2滑动完毕
// Log.i("pssc","进入了onPageScrollStateChanged");
if (state==2){
switch (viewPager.getCurrentItem()){
case PAGE_ONE: rb_channel.setChecked(true); break;
case PAGE_TWO: rb_message.setChecked(true); break;
case PAGE_THREE: rb_better.setChecked(true); break;
case PAGE_FOUR: rb_setting.setChecked(true); break;
}
}
}
@Override
public void onCheckedChanged(RadioGroup group, int checkedId) {
// Log.i("msg","hjhhhhhjh");
switch (checkedId) {
case R.id.rb_channel:
viewPager.setCurrentItem(PAGE_ONE);
break;
case R.id.rb_message:
viewPager.setCurrentItem(PAGE_TWO);
break;
case R.id.rb_better:
viewPager.setCurrentItem(PAGE_THREE);
break;
case R.id.rb_setting:
viewPager.setCurrentItem(PAGE_FOUR);
break;
}
}
@Override
public void onClick(View view) {
}
}
MyFragmentPagerAdapter类
package com.demo;
import android.support.annotation.NonNull;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;
import android.view.ViewGroup;
public class MyFragmentPagerAdapter extends FragmentPagerAdapter {
private static final int PAGER_COUNT=4;
private MyFragment mf1 = null;
private MyFragment mf2 = null;
private MyFragment mf3 = null;
private MyFragment mf4 = null;
public MyFragmentPagerAdapter(FragmentManager fm) {
super(fm);
mf1 = new MyFragment("first fragment");
mf2 = new MyFragment("second fragment");
mf3 = new MyFragment("third fragment");
mf4 = new MyFragment("forth fragment");
}
@Override
public void destroyItem(@NonNull ViewGroup container, int position, @NonNull Object object) {
super.destroyItem(container, position, object);
}
@NonNull
@Override
public Object instantiateItem(@NonNull ViewGroup container, int position) {
return super.instantiateItem(container, position);
}
@Override
public Fragment getItem(int i) {
Fragment fragment = null;
switch (i){
case MainActivity.PAGE_ONE:
fragment = mf1;
break;
case MainActivity.PAGE_TWO:
fragment = mf2;
break;
case MainActivity.PAGE_THREE:
fragment = mf3;
break;
case MainActivity.PAGE_FOUR:
fragment = mf4;
break;
}
return fragment;
}
@Override
public int getCount() {
return PAGER_COUNT;
}
}
完成~
