android选项卡

public class MainActivity extends AppCompatActivity {    // 定义FragmentTabHost对象    PRivate FragmentTabHost mTabHost;    // 定义数组来存放Fragment界面    private Class<?> mFragmentArray[] = {            RecordFragment.newInstance(0).getClass(),            InteractFragment.newInstance(1).getClass(),            RemindFragment.newInstance(2).getClass(),            MyFragment.newInstance(3).getClass()};    //定义数组来存放按钮图片    private int mImageViewArray[] = {            R.drawable.selector_tab_home,            R.drawable.selector_tab_square,            R.drawable.selector_tab_mine,            R.drawable.selector_tab_my};    //Tab选项卡的文字    private String mTextViewArray[] = {"记录", "互动", "提醒", "我的"};    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);//        initVariables();        bindView(savedInstanceState);        initData();        initExit();    }//    @Override//    protected void initVariables() {////    }//    private DoubleClickExitDetector mClickExitDetector;  //双击返回监听//    @Override//    public void onBackPressed() {//        if (mClickExitDetector.onClick()) {  //退出程序//            System.exit(0);////            finish();//        }//    }//    @Override    protected void bindView(Bundle savedInstanceState) {        setContentView(R.layout.activity_main);        mTabHost = (FragmentTabHost) findViewById(R.id.tab_host_app_main);        mTabHost.setup(this, getSupportFragmentManager(), R.id.fl_app_main_content);        //得到fragment个数        int count = mFragmentArray.length;        for (int i = 0; i < count; i++) {            //为每个Tab按钮设置图标、文字以及内容            TabHost.TabSpec tabSpec = mTabHost.newTabSpec(mTextViewArray[i]).setIndicator(getTabItemView(i));            // 将Tab按钮添加进Tab选项卡中            mTabHost.addTab(tabSpec, mFragmentArray[i], null);            //去分隔线            mTabHost.getTabWidget().setDividerDrawable(null);        }    }//    @Override    protected void initData() {    }    /**     * 初始化变量     */    private void initVar() {    }    /**     * 给Tab按钮设置图标和文字     */    private View getTabItemView(int index) {        View view = getLayoutInflater().inflate(R.layout.tab_item_view, null);        ImageView imageView = (ImageView) view.findViewById(R.id.iv_tab_icon);        imageView.setImageResource(mImageViewArray[index]);        TextView textView = (TextView) view.findViewById(R.id.tv_tab_text);        textView.setText(mTextViewArray[index]);        return view;    }    /**     * 初始化双击返回的类     */    private void initExit() {//        mClickExitDetector = new DoubleClickExitDetector(this);    }
}
activity_main
<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:orientation="vertical">    <!--该FrameLayout布局用来显示fragment-->    <FrameLayout        android:id="@+id/fl_app_main_content"        android:layout_width="fill_parent"        android:layout_height="0dp"        android:layout_weight="1">    </FrameLayout>    <View        android:layout_width="match_parent"        android:layout_height="1dp"        android:background="@color/gray_line_bg"/>    <!--这个FragmentTabHost用于显示下方的功能标签 -->    <android.support.v4.app.FragmentTabHost        android:id="@+id/tab_host_app_main"        android:layout_width="match_parent"        android:layout_height="56dp"        android:background="#FFFFFF"/></LinearLayout>
RecordFragment（其中一个）
public class RecordFragment extends Fragment {    protected static String ARGUMENT_NUM = "num";    // TODO: Rename parameter arguments, choose names that match    // the fragment initialization parameters, e.g. ARG_ITEM_NUMBER    private static final String ARG_PARAM1 = "param1";    private static final String ARG_PARAM2 = "param2";    // TODO: Rename and change types of parameters    private String mParam1;    private String mParam2;    private OnFragmentInteractionListener mListener;    public RecordFragment() {        // Required empty public constructor    }    /**     * Use this factory method to create a new instance of     * this fragment using the provided parameters.     *     * @return A new instance of fragment RecordFragment.     */    // TODO: Rename and change types and number of parameters    public static RecordFragment newInstance(int num) {        RecordFragment f = new RecordFragment();        Bundle args = new Bundle();        args.putInt(ARGUMENT_NUM, num);        f.setArguments(args);        return f;    }    @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        if (getArguments() != null) {            mParam1 = getArguments().getString(ARG_PARAM1);            mParam2 = getArguments().getString(ARG_PARAM2);        }    }    @Override    public View onCreateView(LayoutInflater inflater, ViewGroup container,                             Bundle savedInstanceState) {        // Inflate the layout for this fragment        return inflater.inflate(R.layout.fragment_record, container, false);    }    // TODO: Rename method, update argument and hook method into UI event    public void onButtonPressed(Uri uri) {        if (mListener != null) {            mListener.onFragmentInteraction(uri);        }    }//    @Override//    public void onAttach(Context context) {//        super.onAttach(context);//        if (context instanceof OnFragmentInteractionListener) {//            mListener = (OnFragmentInteractionListener) context;//        } else {//            throw new RuntimeException(context.toString()//                    + " must implement OnFragmentInteractionListener");//        }//    }    @Override    public void onDetach() {        super.onDetach();        mListener = null;    }    /**     * This interface must be implemented by activities that contain this     * fragment to allow an interaction in this fragment to be communicated     * to the activity and potentially other fragments contained in that     * activity.     * <p/>     * See the Android Training lesson <a href=     * "http://developer.android.com/training/basics/fragments/communicating.html"     * >Communicating with Other Fragments</a> for more information.     */    public interface OnFragmentInteractionListener {        // TODO: Update argument type and name        void onFragmentInteraction(Uri uri);    }}
fragment_record
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent"    tools:context="yhb.com.test.RecordFragment">    <!-- TODO: Update blank fragment layout -->    <TextView        android:layout_width="match_parent"        android:layout_height="match_parent"        android:text="@string/hello_blank_fragment" /></FrameLayout>
selector_tab_home按下选项卡变化效果
<?xml version="1.0" encoding="utf-8"?><selector xmlns:android="http://schemas.android.com/apk/res/android">    <item android:drawable="@drawable/jilu_icon" android:state_selected="true"/>    <item android:drawable="@drawable/jilu_icon2"/></selector>