实例介绍
【实例截图】
【核心代码】
package com.yidou.wandou.example_33.ui; import android.content.Context; import android.os.Bundle; import android.support.v4.app.FragmentManager; import android.support.v4.app.FragmentTransaction; import android.support.v7.app.AppCompatActivity; import android.widget.FrameLayout; import com.ashokvarma.bottomnavigation.BottomNavigationBar; import com.ashokvarma.bottomnavigation.BottomNavigationItem; import com.yidou.wandou.example_33.fragments.GuanzhuFragment; import com.yidou.wandou.example_33.fragments.HomeFragment; import com.yidou.wandou.example_33.fragments.MineFragment; import com.yidou.wandou.example_33.fragments.TixingFragment; import butterknife.BindView; import butterknife.ButterKnife; public class MainActivity extends AppCompatActivity { @BindView(R.id.main_frame) FrameLayout mMainFrame; @BindView(R.id.main_bottomBar) BottomNavigationBar mMainBottomBar; private Context mContext; private FragmentManager fm; private HomeFragment mHomeFragment; private GuanzhuFragment mGuanzhuFragment; private TixingFragment mTixingFragment; private MineFragment mMineFragment; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); ButterKnife.bind(this); mContext = this; fm = getSupportFragmentManager(); initBottom(); } private void initBottom() { mMainBottomBar.setMode(BottomNavigationBar.MODE_FIXED); mMainBottomBar.setBackgroundStyle(BottomNavigationBar.BACKGROUND_STYLE_STATIC); mMainBottomBar.addItem(new BottomNavigationItem(R.drawable.cb_icon_discover_selected, "首页") .setActiveColorResource(R.color.colorBG).setInactiveIcon(mContext.getResources().getDrawable(R.drawable.cb_icon_discover_normal))) .addItem(new BottomNavigationItem(R.drawable.cb_icon_guanzhu_selected, "关注") .setActiveColorResource(R.color.colorBG).setInactiveIcon(mContext.getResources().getDrawable(R.drawable.cb_icon_guanzhu_normal))) .addItem(new BottomNavigationItem(R.drawable.cb_icon_tixing_selected, "消息") .setActiveColorResource(R.color.colorBG).setInactiveIcon(mContext.getResources().getDrawable(R.drawable.cb_icon_tixing_normal))) .addItem(new BottomNavigationItem(R.drawable.cb_icon_more_selected, "我的") .setActiveColorResource(R.color.colorBG).setInactiveIcon(mContext.getResources().getDrawable(R.drawable.cb_icon_more_normal))) .setFirstSelectedPosition(0) .initialise(); mMainBottomBar.setTabSelectedListener(new BottomNavigationBar.OnTabSelectedListener() { @Override public void onTabSelected(int position) { switch (position) { case 0: showFragment(0); break; case 1: showFragment(1); break; case 2: showFragment(2); break; case 3: showFragment(3); break; default: break; } } @Override public void onTabUnselected(int position) { } @Override public void onTabReselected(int position) { } }); showFragment(0); } /** * 展示fragment * * @param position */ private void showFragment(int position) { FragmentTransaction ft = fm.beginTransaction(); hideFragments(ft); switch (position) { case 0: if (mHomeFragment != null) { ft.show(mHomeFragment); } else { mHomeFragment = new HomeFragment(); ft.add(R.id.main_frame, mHomeFragment); } break; case 1: if (mGuanzhuFragment != null) { ft.show(mGuanzhuFragment); } else { mGuanzhuFragment = new GuanzhuFragment(); ft.add(R.id.main_frame, mGuanzhuFragment); } break; case 2: if (mTixingFragment != null) { ft.show(mTixingFragment); } else { mTixingFragment = new TixingFragment(); ft.add(R.id.main_frame, mTixingFragment); } break; case 3: if (mMineFragment != null) { ft.show(mMineFragment); } else { mMineFragment = new MineFragment(); ft.add(R.id.main_frame, mMineFragment); } break; default: break; } ft.commit(); } private void hideFragments(FragmentTransaction ft) { if (mHomeFragment != null) { ft.hide(mHomeFragment); } if (mGuanzhuFragment != null) { ft.hide(mGuanzhuFragment); } if (mTixingFragment != null) { ft.hide(mTixingFragment); } if (mMineFragment != null) { ft.hide(mMineFragment); } } }
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