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！
1 //数据 2 private int mImageViewArray[] = {R.drawable.home_tab1, R.drawable.home_tab2, R.drawable.home_tab3}; 3 private String mTextviewArray[] = {"首页", "设置","我的"}; 4 private Class fragmentArray[] = {Fragment1.class, Fragment2.class, Fragment3.class}; 5 6 //初始化以及设置数据 7 mTabHost = (FragmentTabHost) findViewById(android.R.id.tabhost); 8 mTabHost.setup(this, getSupportFragmentManager(), R.id.realtabcontent); 9 int count = fragmentArray.length; 10 for (int i = 0; i < count; i++) { 11 TabHost.TabSpec tabSpec = mTabHost.newTabSpec(mTextviewArray[i]) 12 .setIndicator(getTabItemView(i)); 13 mTabHost.addTab(tabSpec, fragmentArray[i], null); 14 mTabHost.getTabWidget().getChildAt(i) 15 .setBackgroundResource(R.drawable.bg_tbitem); 16 } 17 mTabHost.setCurrentTabByTag(mTextviewArray[0]); 18 mTabHost.getTabWidget().setDividerDrawable(null); 19 20 mTabHost.setOnTabChangedListener(new TabHost.OnTabChangeListener() { 21 @Override 22 public void onTabChanged(String s) { 23 24 25 } 26 }); 27 28 29 /** 30 * 项的样式 31 * 32 * @param index 第几个 33 * @return 每一个Tab样式 34 */ 35 private View getTabItemView(int index) { 36 View view = layoutInflater.inflate(R.layout.tab_home_item, null); 37 ImageView imageView = (ImageView) view.findViewById(R.id.icon); 38 imageView.setImageResource(mImageViewArray[index]); 39 TextView textView = (TextView) view.findViewById(R.id.name); 40 textView.setText(mTextviewArray[index]); 41 return view; 42 }
对了，其中图片我们都设置成了selector，才有点击变色的效果
1 <selector xmlns:android="http://schemas.android.com/apk/res/android"> 2 <item android:drawable="@drawable/btn_jiance_pre" android:state_pressed="false" android:state_selected="true" /> 3 <item android:drawable="@drawable/btn_jiance_nor" android:state_focused="false" android:state_pressed="false" android:state_selected="false" /> 4 <item android:drawable="@drawable/btn_jiance_pre" android:state_focused="true" android:state_pressed="true" /> 5 </selector>