MyFragmentPagerAdapter.java
package com.turing.base.activity.fragment.fragmentPractice4; import android.support.v4.app.Fragment; import android.support.v4.app.FragmentManager; import android.support.v4.app.FragmentPagerAdapter; /** * MyApp * * @author Mr.Yang on 2016-03-16 22:50. * @version 1.0 * @desc */ public class MyFragmentPagerAdapter extends FragmentPagerAdapter { private final int PAGER_COUNT = 4; private Fragment1 myFragment1 = null; private Fragment2 myFragment2 = null; private Fragment3 myFragment3 = null; private Fragment4 myFragment4 = null; public MyFragmentPagerAdapter(FragmentManager fm) { super(fm); myFragment1 = new Fragment1(); myFragment2 = new Fragment2(); myFragment3 = new Fragment3(); myFragment4 = new Fragment4(); } @Override public Fragment getItem(int position) { Fragment fragment = null; switch (position) { case BottomNvgViewPageAct.PAGE_ONE: fragment = myFragment1; break; case BottomNvgViewPageAct.PAGE_TWO: fragment = myFragment2; break; case BottomNvgViewPageAct.PAGE_THREE: fragment = myFragment3; break; case BottomNvgViewPageAct.PAGE_FOUR: fragment = myFragment4; break; } return fragment; } @Override public int getCount() { return PAGER_COUNT; } }1
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Step 5：BottomNvgViewPageAct的编写： package com.turing.base.activity.fragment.fragmentPractice4; import android.os.Bundle; import android.support.v4.view.ViewPager; import android.support.v7.app.AppCompatActivity; import android.widget.RadioButton; import android.widget.RadioGroup; import android.widget.TextView; import com.turing.base.R; public class BottomNvgViewPageAct extends AppCompatActivity implements RadioGroup.OnCheckedChangeListener, ViewPager.OnPageChangeListener { //UI Objects private TextView txt_topbar; private RadioGroup rg_tab_bar; private RadioButton rb_channel; private RadioButton rb_message; private RadioButton rb_better; private RadioButton rb_setting; private ViewPager vpager; private MyFragmentPagerAdapter mAdapter; //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; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_bottom_nvg_view_page); mAdapter = new MyFragmentPagerAdapter(getSupportFragmentManager()); bindViews(); rb_channel.setChecked(true); } private void bindViews() { txt_topbar = (TextView) findViewById(R.id.txt_topbar); rg_tab_bar = (RadioGroup) findViewById(R.id.rg_tab_bar); rb_channel = (RadioButton) findViewById(R.id.rb_channel); rb_message = (RadioButton) findViewById(R.id.rb_message); rb_better = (RadioButton) findViewById(R.id.rb_better); rb_setting = (RadioButton) findViewById(R.id.rb_setting); rg_tab_bar.setOnCheckedChangeListener(this); vpager = (ViewPager) findViewById(R.id.vpager); vpager.setAdapter(mAdapter); vpager.setCurrentItem(0); vpager.addOnPageChangeListener(this); } @Override public void onCheckedChanged(RadioGroup group, int checkedId) { switch (checkedId) { case R.id.rb_channel: vpager.setCurrentItem(PAGE_ONE); break; case R.id.rb_message: vpager.setCurrentItem(PAGE_TWO); break; case R.id.rb_better: vpager.setCurrentItem(PAGE_THREE); break; case R.id.rb_setting: vpager.setCurrentItem(PAGE_FOUR); break; } } //重写ViewPager页面切换的处理方法 @Override public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) { } @Override public void onPageSelected(int position) { } @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 if (state == 2) { switch (vpager.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; } } } }1
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TabLayout +ViewPager关于TabLayout的使用，请查看本人博客TabLayout-Android M新控件
效果图