FragmentTabHost+FrameLayout实现底部菜单栏

现在一般的app都使用底部菜单栏，那具体怎么实现的呢！我们就来看看

首先给大家展示一下布局文件

 1 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 2     android:orientation="vertical" android:layout_width="match_parent"
 3     android:layout_height="match_parent">
 4     <FrameLayout
 5         android:id="@+id/realtabcontent"
 6         android:layout_width="fill_parent"
 7         android:layout_height="0dip"
 8         android:layout_weight="1"
 9         android:background="@color/white" />
10
11
12     <LinearLayout
13         android:layout_width="match_parent"
14         android:layout_height="wrap_content"
15         android:layout_gravity="bottom"
16         android:orientation="vertical">
17
18         <View
19             android:layout_width="match_parent"
20             android:layout_height="1px"
21             android:background="@color/color_home_tab_line" />
22
23         <android.support.v4.app.FragmentTabHost
24             android:id="@android:id/tabhost"
25             android:layout_width="fill_parent"
26             android:layout_height="wrap_content"
27             android:background="@color/et_divider_disable">
28
29             <FrameLayout
30                 android:id="@android:id/tabcontent"
31                 android:layout_width="0dp"
32                 android:layout_height="0dp"
33                 android:layout_weight="0" />
34         </android.support.v4.app.FragmentTabHost>
35
36     </LinearLayout>
37 </LinearLayout>

接下来就是怎么使用了，其实比较简单，我们就看代码吧！

 //数据
 private int mImageViewArray[] = {R.drawable.home_tab1, R.drawable.home_tab2, R.drawable.home_tab3};
     private String mTextviewArray[] = {"首页", "设置","我的"};
     private Class fragmentArray[] = {Fragment1.class, Fragment2.class, Fragment3.class};

 //初始化以及设置数据
  mTabHost = (FragmentTabHost) findViewById(android.R.id.tabhost);
         mTabHost.setup(this, getSupportFragmentManager(), R.id.realtabcontent);
         int count = fragmentArray.length;
         for (int i = 0; i < count; i++) {
             TabHost.TabSpec tabSpec = mTabHost.newTabSpec(mTextviewArray[i])
                     .setIndicator(getTabItemView(i));
             mTabHost.addTab(tabSpec, fragmentArray[i], null);
             mTabHost.getTabWidget().getChildAt(i)
                     .setBackgroundResource(R.drawable.bg_tbitem);
         }
         mTabHost.setCurrentTabByTag(mTextviewArray[0]);
         mTabHost.getTabWidget().setDividerDrawable(null);

         mTabHost.setOnTabChangedListener(new TabHost.OnTabChangeListener() {
             @Override
             public void onTabChanged(String s) {

             }
         });

  /**
      * 项的样式
      *
      * @param index 第几个
      * @return 每一个Tab样式
      */
     private View getTabItemView(int index) {
         View view = layoutInflater.inflate(R.layout.tab_home_item, null);
         ImageView imageView = (ImageView) view.findViewById(R.id.icon);
         imageView.setImageResource(mImageViewArray[index]);
         TextView textView = (TextView) view.findViewById(R.id.name);
         textView.setText(mTextviewArray[index]);
         return view;
     }

对了，其中图片我们都设置成了selector，才有点击变色的效果

 <selector xmlns:android="http://schemas.android.com/apk/res/android">
     <item android:drawable="@drawable/btn_jiance_pre" android:state_pressed="false" android:state_selected="true" />
     <item android:drawable="@drawable/btn_jiance_nor" android:state_focused="false" android:state_pressed="false" android:state_selected="false" />
     <item android:drawable="@drawable/btn_jiance_pre" android:state_focused="true" android:state_pressed="true" />
 </selector>