Android实现简单底部导航栏 Android仿微信滑动切换效果

Android仿微信滑动切换最终实现效果：

大体思路：

1. 主要使用两个自定义View配合实现; 底部图标加文字为一个自定义view,底部导航栏为一个载体,根据需要来添加底部图标;
2. 底部导航栏的设置方法类似于TabLayout的关联,View需要创建关联方法,用来关联VIewPager;
3. 通过关联方法获取ViewPager实例后,根据ViewPager页面数创建底部导航栏的图标按钮;

代码实现:

1. 新建第一个自定义View, 图标 + 文字的底部按钮;

/**  * 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);       }     }   } }

2. 创建第二个自定义View,该View为底部导航栏载体,根据关联的ViewPager页面个数创建底部导航栏图标;

/**  * 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);   } }

3. 添加图标自定义类, 该类封装着底部导航栏中每一个选项的的图标和文字,将该类型对象添加到集合中,用于给底部导航栏设置图标;

/**  * 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;   } }

自定义View实现完成,在Fragment或Activity中使用该View:

1. 在布局文件中添加:

2. 在活动或碎片中添加:

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();     }   } }

总结：该代码耦合度较高,有些代码可能不太合理;欢迎大牛们给出合理建议;

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。

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