Android实现简单底部导航栏 Android仿微信滑动切换效果

/** 
 * 自定义控件,该控件为底部导航栏中的图标 
 * Created by MrZheng on 2017/8/2. 
 */ 
 
public class TabView extends LinearLayout { 
  BotBean mBean; 
  private TextView title; 
  private ImageView iconImage; 
 
 
  /** 
   * 引用此控件,只能通过new 方法;接收一个TabView 
   * @param context 
   */ 
  public TabView(Context context, BotBean bean) { 
    super(context); 
    this.mBean = bean; 
    initView(); 
  } 
 
  /** 
   * 初始化布局 
   */ 
  public void initView() { 
    setOrientation(VERTICAL); 
    setGravity(Gravity.CENTER); 
 
    //添加小图标 
    iconImage = new ImageView(getContext()); 
    LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT 
        , ViewGroup.LayoutParams.WRAP_CONTENT); 
    iconImage.setLayoutParams(layoutParams); 
    iconImage.setImageResource(mBean.getUncheckedId()); 
 
    Drawable drawable = getContext().getResources().getDrawable(mBean.getUncheckedId()); 
    Drawable wrapDrawable = DrawableCompat.wrap(drawable); 
    DrawableCompat.setTintList(wrapDrawable, ColorStateList.valueOf(Color.BLACK)); 
    iconImage.setImageDrawable(wrapDrawable); 
 
    addView(iconImage); 
 
    //标题 
    title = new TextView(getContext()); 
    LinearLayout.LayoutParams titleParams = new LayoutParams(LayoutParams.WRAP_CONTENT, 
        LayoutParams.WRAP_CONTENT); 
    title.setLayoutParams(titleParams); 
    title.setText(mBean.getContent()); 
    addView(title); 
  } 
 
  //判断选择状态,改变图标 
  //供外部调用 
  public void setSelected(boolean isSelected) { 
    if (mBean == null) { 
      return; 
    } 
    if (isSelected) { 
      if (iconImage != null) { 
        //使用颜色过滤器,改变选中时的颜色 
        Drawable drawable = getContext().getResources().getDrawable(mBean.getUncheckedId()); 
        Drawable wrapDrawable = DrawableCompat.wrap(drawable); 
        DrawableCompat.setTintList(wrapDrawable, ColorStateList.valueOf(Color.GREEN)); 
        iconImage.setImageDrawable(wrapDrawable); 
 
        title.setTextColor(Color.GREEN); 
      } 
    } else { 
      if (title != null) { 
//        iconImage.setImageResource(mBean.getUncheckedId()); 
        Drawable drawable = getContext().getResources().getDrawable(mBean.getUncheckedId()); 
        Drawable wrapDrawable = DrawableCompat.wrap(drawable); 
        DrawableCompat.setTintList(wrapDrawable, ColorStateList.valueOf(Color.BLACK)); 
        iconImage.setImageDrawable(wrapDrawable); 
 
        title.setTextColor(Color.GRAY); 
      } 
    } 
  } 
} 

/** 
 * 该控件为底部导航栏图标载体 
 * Created by MrZheng on 2017/8/2. 
 */ 
 
public class bottomView extends LinearLayout { 
 
  private ViewPager vp; 
  BottomPageChangeListener mBottomPageChangeListener; 
 
 
  public bottomView(Context context) { 
    super(context); 
  } 
  public bottomView(Context context, @Nullable AttributeSet attrs) { 
    super(context, attrs); 
  } 
  public bottomView(Context context, @Nullable AttributeSet attrs, int defStyleAttr) { 
    super(context, attrs, defStyleAttr); 
  } 
 
  /** 
   * 同TabLayout用法相似,需要与ViewPager进行绑定 
   */ 
  public void setViewPager(ViewPager viewPager, ArrayList<BotBean> botBeen,BottomPageChangeListener bottomPageChangeListener) { 
    if (viewPager == null) { 
      return; 
    } 
    vp = viewPager; 
    mBottomPageChangeListener = bottomPageChangeListener; 
    initTabView(botBeen); 
 
    //设置ViewPager的点击事件 
    vp.addOnPageChangeListener(new ViewPager.SimpleOnPageChangeListener(){ 
      @Override 
      public void onPageSelected(int position) { 
        for (int i = 0; i < getChildCount(); i++) { 
          getChildAt(i).setSelected((position == i ? true : false)); 
        } 
        if (mBottomPageChangeListener != null) { 
          mBottomPageChangeListener.onPageChangeListener(position); 
        } 
      } 
    }); 
  } 
 
  /** 
   * 初始化底部导航栏,ViewPager有多少页,就创建多少个图标 
   */ 
  public void initTabView(ArrayList<BotBean> botBeen) { 
    setGravity(HORIZONTAL); 
    for (int i = 0; i < botBeen.size(); i++) { 
      BotBean bean = botBeen.get(i); 
      TabView tabView = new TabView(getContext(), bean); 
      LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT 
          , ViewGroup.LayoutParams.WRAP_CONTENT); 
      params.weight = 1; 
      params.gravity = Gravity.CENTER; 
      tabView.setLayoutParams(params); 
 
      //为每个view设置点击事件,点击跳转过去 
      final int finalI = i; 
      tabView.setOnClickListener(new OnClickListener() { 
        @Override 
        public void onClick(View view) { 
          vp.setCurrentItem(finalI); 
        } 
      }); 
      //设置一开始选中状态 
      if (i == 0) { 
        tabView.setSelected(true); 
        //由于初始化时,onPageSelected()选中方法并没有的到执行,所以主动去调用回调方法 
        if (mBottomPageChangeListener != null) { 
          mBottomPageChangeListener.onPageChangeListener(i); 
        } 
      } 
      addView(tabView); 
    } 
  } 
 
 
  /** 
   * 提供接口回调方法,每次滑动都通知外界 
   */ 
  public interface BottomPageChangeListener{ 
    void onPageChangeListener(int position); 
  } 
} 

/** 
 * 底部导航栏的封装类,该类对象用于在底部导航栏添加对应图标和文字 
 * Created by MrZheng on 2017/8/2. 
 */ 
 
public class BotBean { 
  String content;//图标名字 
  int uncheckedId;//未选中时的图标 
 
  public BotBean(String content, int uncheckedId) { 
    this.content = content; 
    this.uncheckedId = uncheckedId; 
  } 
 
  public String getContent() { 
    return content; 
  } 
 
  public void setContent(String content) { 
    this.content = content; 
  } 
 
  public int getUncheckedId() { 
    return uncheckedId; 
  } 
 
  public void setUncheckedId(int uncheckedId) { 
    this.uncheckedId = uncheckedId; 
  } 
} 

<zhengyanze.com.bottomdemo.widget.bottomView 
    android:id="@+id/bottom" 
    android:layout_width="match_parent" 
    android:layout_height="60dp"> 
  </zhengyanze.com.bottomdemo.widget.bottomView> 

public class MainActivity extends AppCompatActivity { 
  ArrayList<Fragment> mFragments; 
  ArrayList<BotBean> mItemIcon;//存放底部图标和文字 
  private TextView tv; 
 
  @Override 
  protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_main); 
    mFragments = new ArrayList<>(); 
    mItemIcon = new ArrayList<>(); 
 
    mFragments.add(new TextFragment()); 
    mFragments.add(new TextFragment()); 
    mFragments.add(new TextFragment()); 
    mFragments.add(new TextFragment()); 
    mItemIcon.add(new BotBean("首页", R.mipmap.ic_home2)); 
    mItemIcon.add(new BotBean("通讯录", R.mipmap.ic_study2)); 
    mItemIcon.add(new BotBean("发现", R.mipmap.ic_found2)); 
    mItemIcon.add(new BotBean("我的", R.mipmap.ic_me2)); 
 
    ViewPager vp = (ViewPager) findViewById(R.id.vp); 
    vp.setAdapter(new FAdapter(getSupportFragmentManager())); 
 
    tv = (TextView) findViewById(R.id.tv); 
 
    bottomView bottom = (bottomView) findViewById(R.id.bottom); 
    bottom.setViewPager(vp, mItemIcon, new bottomView.BottomPageChangeListener() { 
      @Override 
      public void onPageChangeListener(int position) { 
        //滑动后的回调 
        tv.setText(mItemIcon.get(position).getContent()); 
      } 
    }); 
  } 
 
  /** 
   * 适配器 
   */ 
  class FAdapter extends FragmentPagerAdapter { 
    public FAdapter(FragmentManager fm) { 
      super(fm); 
    } 
 
    @Override 
    public Fragment getItem(int position) { 
      return mFragments.get(position); 
    } 
    @Override 
    public int getCount() { 
      return mFragments.size(); 
    } 
  } 
}