Android使用BottomNavigationBar实现底部导航栏

本文实例为大家分享了Android实现底部导航栏的具体代码，供大家参考，具体内容如下

展示

MODE_FIXED+BACKGROUND_STYLE_STATIC效果

DE_FIXED+BACKGROUND_STYLE_RIPPLE效果

MODE_SHIFTING+BACKGROUND_STYLE_STATIC效果

MODE_SHIFTING+BACKGROUND_STYLE_RIPPLE效果

1在Gradle中添加

compile ‘com.ashokvarma.android:bottom-navigation-bar:0.9.5'

2布局实现

3类中Activity中添加BottomNavigationItem

BottomNavigationBar bottomNavigationBar = (BottomNavigationBar) findViewById(R.id.bottom_navigation_bar);
 
bottomNavigationBar
        .addItem(new BottomNavigationItem(R.drawable.ic_home_white_24dp, "Home"))
        .addItem(new BottomNavigationItem(R.drawable.ic_book_white_24dp, "Books"))
        .addItem(new BottomNavigationItem(R.drawable.ic_music_note_white_24dp, "Music"))
        .addItem(new BottomNavigationItem(R.drawable.ic_tv_white_24dp, "Movies & TV"))
        .addItem(new BottomNavigationItem(R.drawable.ic_videogame_asset_white_24dp, "Games"))
        .initialise();

4设置事件监听器TabChangeListener

 bottomNavigationBar.setTabSelectedListener(new BottomNavigationBar.OnTabSelectedListener(){
      @Override
      public void onTabSelected(int position) {
      }
      @Override
      public void onTabUnselected(int position) {]
      }
      @Override
      public void onTabReselected(int position) {
      }
    });

5.代码实现

package com.android.xiaobai; 
 
import android.os.Bundle; 
import android.support.annotation.Nullable; 
import android.support.v4.app.Fragment; 
import android.support.v4.app.FragmentManager; 
import android.support.v4.app.FragmentTransaction; 
import android.support.v7.app.AppCompatActivity; 
import android.util.Log; 
 
import com.ashokvarma.bottomnavigation.BottomNavigationBar; 
import com.ashokvarma.bottomnavigation.BottomNavigationItem; 
 
import java.util.ArrayList; 
 
import fragment.ContactsFragment; 
import fragment.DongtaiFragment; 
import fragment.MsgFragment; 
 
/** 
 * Created by xiaobai on 2018/1/31/031. 
 */ 
 
public class MessageActivity extends AppCompatActivity implements BottomNavigationBar.OnTabSelectedListener { 
  private ArrayList fragments; 
  private BottomNavigationBar bottomNavigationBar; 
  private MsgFragment msgFragment; 
  private ContactsFragment contactsFragment; 
  private DongtaiFragment dongtaiFragment; 
  private FragmentManager fragmentManager; 
  private FragmentTransaction transaction; 
  int lastSelectedPosition = 0; 
 
  @Override 
  protected void onCreate(@Nullable Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activty_message); 
 
    bottomNavigationBar = findViewById(R.id.bottom_navigation_bar); 
    init(); 
  } 
 
  private void init() { 
    //要先设计模式后再添加图标！ 
    //设置按钮模式 MODE_FIXED表示固定  MODE_SHIFTING表示转移 
    bottomNavigationBar.setMode(BottomNavigationBar.MODE_FIXED); 
    //设置背景风格 
    // BACKGROUND_STYLE_STATIC表示静态的 
    //BACKGROUND_STYLE_RIPPLE表示涟漪的，也就是可以变化的 ，跟随setActiveColor里面的颜色变化 
    bottomNavigationBar.setBackgroundStyle(BottomNavigationBar.BACKGROUND_STYLE_RIPPLE); 
    //添加并设置图标、图标的颜色和文字 
    bottomNavigationBar 
        .addItem(new BottomNavigationItem(R.drawable.im_botton_message, "消息")).setActiveColor(R.color.blue) 
        .addItem(new BottomNavigationItem(R.drawable.im_botton_contacts, "联系人")).setActiveColor(R.color.red) 
        .addItem(new BottomNavigationItem(R.drawable.im_botton_dongtai, "动态")).setActiveColor(R.color.orign) 
        .setFirstSelectedPosition(lastSelectedPosition ) 
        .initialise(); 
 
    bottomNavigationBar.setTabSelectedListener(this); 
    setDefaultFragment(); 
  } 
 
  //设置初始界面 
  private void setDefaultFragment() { 
    fragmentManager = getSupportFragmentManager(); 
    transaction = fragmentManager.beginTransaction(); 
    transaction.replace(R.id.layFrame, MsgFragment.newInstance("消息")); 
    transaction.commit(); 
  } 
 
  @Override 
  public void onTabSelected(int position) { 
    fragmentManager = getSupportFragmentManager(); 
    transaction = fragmentManager.beginTransaction(); 
    switch (position) { 
      case 0: 
        if (msgFragment == null) { 
          msgFragment = MsgFragment.newInstance("消息"); 
        } 
        transaction.replace(R.id.layFrame, msgFragment); 
        break; 
      case 1: 
        if (contactsFragment == null) { 
          contactsFragment = ContactsFragment.newInstance("联系人"); 
        } 
        transaction.replace(R.id.layFrame, contactsFragment); 
        break; 
      case 2: 
        if (dongtaiFragment == null) { 
          dongtaiFragment = DongtaiFragment.newInstance("动态"); 
        } 
        transaction.replace(R.id.layFrame, dongtaiFragment); 
        break; 
      default: 
        break; 
    } 
    // 事务提交 
    transaction.commit(); 
  } 
 
  @Override 
  public void onTabUnselected(int position) { 
    Log.d("dongtaiFragment", "onTabUnselected() called with: " + "position = [" + position + "]"); 
  } 
 
  @Override 
  public void onTabReselected(int position) { 
 
  } 
} 

package fragment; 
 
import android.os.Bundle; 
import android.support.annotation.Nullable; 
import android.view.LayoutInflater; 
import android.view.View; 
import android.view.ViewGroup; 
import android.widget.TextView; 
 
import com.android.xiaobai.R; 
 
/** 
 * Created by xiaobai on 2018/1/31/031. 
 */ 
 
public class MsgFragment extends BaseFragment { 
  /** 
   * 标志位，标志已经初始化完成 
   */ 
  private boolean isPrepared; 
  /** 
   * 是否已被加载过一次，第二次就不再去请求数据了 
   */ 
  private boolean mHasLoadedOnce; 
  TextView textView; 
  @Nullable 
  @Override 
  public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) { 
    if (mView == null) { 
      // 需要inflate一个布局文件 填充Fragment 
      mView = inflater.inflate(R.layout.fragment_msg, container, false); 
      initView(); 
      isPrepared = true; 
//    实现懒加载 
      lazyLoad(); 
    } 
    //缓存的mView需要判断是否已经被加过parent， 如果有parent需要从parent删除，要不然会发生这个mView已经有parent的错误。 
    ViewGroup parent = (ViewGroup) mView.getParent(); 
    if (parent != null) { 
      parent.removeView(mView); 
    } 
 
    return mView; 
  } 
  /** 
   * 初始化控件 
   */ 
  private void initView() { 
 
  } 
 
  @Override 
  public void lazyLoad() { 
    if (!isPrepared || !isVisible || mHasLoadedOnce) { 
      return; 
    } 
    //填充各控件的数据 
    mHasLoadedOnce = true; 
  } 
  public static MsgFragment newInstance(String param1) { 
    MsgFragment fragment = new MsgFragment(); 
    Bundle args = new Bundle(); 
    args.putString("agrs1", param1); 
    fragment.setArguments(args); 
    return fragment; 
  } 
} 

package fragment; 
 
import android.support.v4.app.Fragment; 
import android.view.View; 
 
 
/** 
 * Created by xiaobai on 2018/1/31/031. 
 */ 
 
public abstract class BaseFragment extends Fragment { 
  /** 
   * Fragment当前状态是否可见 
   */ 
  public boolean isVisible; 
 
  /** 
   * inflate布局文件 返回的view 
   */ 
  public View mView; 
 
  /** 
   * 简化 findViewById 
   * 
   * @param viewId 
   * @param  
   * @return 
   */ 
  protected  T find(int viewId) { 
    return (T) mView.findViewById(viewId); 
  } 
 
  /** 
   * setUserVisibleHint是在onCreateView之前调用的 
   * 设置Fragment可见状态 
   */ 
  @Override 
  public void setUserVisibleHint(boolean isVisibleToUser) { 
    super.setUserVisibleHint(isVisibleToUser); 
    /** 
     * 判断是否可见 
     */ 
    if (getUserVisibleHint()) { 
      isVisible = true; 
      onVisible(); 
    } else { 
      isVisible = false; 
      onInvisible(); 
    } 
  } 
 
  /** 
   * 可见 
   */ 
  private void onVisible() { 
    lazyLoad(); 
  } 
 
  /** 
   * 不可见 
   */ 
  private void onInvisible() { 
  } 
 
  /** 
   * 延迟加载 
   * 子类必须重写此方法 
   */ 
  public abstract void lazyLoad(); 
} 

BottomNavigationBar 图标和文字的间距：

在自己项目里value文件夹中的dimens.xml里面复写fixed_height_bottom_padding（默认是10dp，值越小，间距越大。适合的模式是BottomNavigationBar.MODE_FIXED）

如果模式是BottomNavigationBar.MODE_SHIFTING也是一样，复写和修改相关的参数

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持脚本之家。