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 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 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; 
 } 
} 

public class MainActivity extends AppCompatActivity { 
 ArrayList mFragments; 
 ArrayList 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(); 
  } 
 } 
}