BottomNavigationView+ViewPager实现导航栏代码

package com.blueskygrid.test1; import android.os.Bundle; import android.support.annotation.NonNull; import android.support.design.widget.BottomNavigationView; import android.support.v4.app.Fragment; import android.support.v4.app.FragmentPagerAdapter; import android.support.v7.app.AppCompatActivity; import android.view.MenuItem; import com.blueskygrid.test1.fragment.HomeFragment; import com.blueskygrid.test1.fragment.MessageFragment; import com.blueskygrid.test1.fragment.PublishFragment; import com.blueskygrid.test1.widget.NoSlidingViewPaper; import java.util.ArrayList; public class MainActivity extends AppCompatActivity { private NoSlidingViewPaper mViewPager; private BottomNavigationView.OnNavigationItemSelectedListener mOnNavigationItemSelectedListener = new BottomNavigationView.OnNavigationItemSelectedListener() { @Override public boolean onNavigationItemSelected(@NonNull MenuItem item) { switch (item.getItemId()) { case R.id.navigation_home: mViewPager.setCurrentItem(0); return true; case R.id.navigation_message: mViewPager.setCurrentItem(1); return true; case R.id.navigation_publish: mViewPager.setCurrentItem(2); return true; } return false; } }; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); /*初始化显示内容*/ mViewPager = (NoSlidingViewPaper) findViewById(R.id.vp_main_container); final ArrayList<Fragment> fgLists = new ArrayList<>(3); fgLists.add(new HomeFragment()); fgLists.add(new MessageFragment()); fgLists.add(new PublishFragment()); FragmentPagerAdapter mAdapter = new FragmentPagerAdapter(getSupportFragmentManager()) { @Override public Fragment getItem(int position) { return fgLists.get(position); } @Override public int getCount() { return fgLists.size(); } }; mViewPager.setAdapter(mAdapter); mViewPager.setOffscreenPageLimit(2); //预加载剩下两页 BottomNavigationView navigation = (BottomNavigationView) findViewById(R.id.navigation); /*给底部导航栏菜单项添加点击事件*/ navigation.setOnNavigationItemSelectedListener(mOnNavigationItemSelectedListener); } }