FragmentTabHost使用方法详解

FragmentTabHost是support-v包下提供的用于集成和管理Fragment页面的组件.

今天要实现的效果图如下:

整体结构是MainActivity+5个模块的Fragment.

MainActivity的布局如下:

<?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">
 <!--真正的内容视图,用于展示Fragment-->
 <FrameLayout
  android:id="@+id/real_tabcontent"
  android:layout_width="match_parent"
  android:layout_height="0dp"
  android:layout_weight="1"/>

 <!--tabhost,必须使用系统的id-->
 <android.support.v4.app.FragmentTabHost
  android:id="@android:id/tabhost"
  android:layout_width="match_parent"
  android:layout_height="wrap_content"
  >
  <!--tabcontent,必须使用系统的id-->
  <FrameLayout
   android:id="@android:id/tabcontent"
   android:layout_width="0dp"
   android:layout_height="0dp"
   android:layout_weight="0"/>
 </android.support.v4.app.FragmentTabHost>

</LinearLayout>

每个tab的布局如下:

<?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="wrap_content"
    android:gravity="center"
    android:orientation="vertical">
 <!--tab图片-->
 <ImageView
  android:id="@+id/iv_tab"
  android:layout_width="26dp"
  android:layout_height="26dp"
  />
 <!--tab名字-->
 <TextView
  android:id="@+id/tv_tab"
  android:layout_width="wrap_content"
  android:layout_height="wrap_content"
  android:layout_marginTop="1dp"
  android:textSize="12sp"/>
</LinearLayout>

MainActivity代码如下:

package blog.csdn.net.mchenys.bsbdj.modul.main;

import android.content.res.ColorStateList;
import android.os.Bundle;
import android.support.v4.app.FragmentTabHost;
import android.text.TextUtils;
import android.view.View;
import android.widget.ImageView;
import android.widget.TabHost;
import android.widget.TextView;

import blog.csdn.net.mchenys.bsbdj.R;
import blog.csdn.net.mchenys.bsbdj.common.base.BaseActivity;
import blog.csdn.net.mchenys.bsbdj.modul.attention.view.AttentionFragment;
import blog.csdn.net.mchenys.bsbdj.modul.essence.view.EssenceFragment;
import blog.csdn.net.mchenys.bsbdj.modul.mine.view.MineFragment;
import blog.csdn.net.mchenys.bsbdj.modul.newpost.view.NewpostFragment;
import blog.csdn.net.mchenys.bsbdj.modul.publish.view.PublishFragment;
import blog.csdn.net.mchenys.bsbdj.mvp.presenter.impl.MvpBasePresenter;
/**
 * Created by mChenys on 2016/5/27.
 */
public class MainActivity extends BaseActivity {

 //定义数组来存放tab的图片选择器
 private int[] mTabImage = {R.drawable.main_bottom_essence_selector,
   R.drawable.main_bottom_latest_selector,
   R.drawable.main_bottom_writeposts_selector,
   R.drawable.main_bottom_news_selector,
   R.drawable.main_bottom_my_selector};

 //tab选项卡的文字
 private String[] mTabTitle = {"精华", "新帖", "", "关注", "我的"};

 //每个tab对应的Fragment的字节码对象
 private Class[] fragmentArray = {EssenceFragment.class, NewpostFragment.class,
   PublishFragment.class, AttentionFragment.class, MineFragment.class};

 @Override
 protected boolean isHomePage() {
  return true;
 }

 @Override
 public Integer getLayoutResId() {
  return R.layout.activity_main;
 }

 @Override
 public void initView() {
  //获取tabhost
  FragmentTabHost tabHost = (FragmentTabHost) findViewById(android.R.id.tabhost);
  //绑定tabContent
  tabHost.setup(this, getSupportFragmentManager(), R.id.real_tabcontent);
  //去掉分割线
  tabHost.getTabWidget().setDividerDrawable(null);
  for (int i = 0; i < fragmentArray.length; i++) {
   //绑定Fragment,添加到的FragmentTabHost
   //设置tab的名称和view
   TabHost.TabSpec tabSpec = tabHost.
     newTabSpec(mTabTitle[i]).
     setIndicator(getTabItemView(i));
   Bundle bundle = new Bundle();
   bundle.putString("title", mTabTitle[i]);
   //添加tab和关联对应的fragment
   tabHost.addTab(tabSpec, fragmentArray[i], bundle);
   //设置tab的背景色
   tabHost.getTabWidget().
     getChildAt(i).
     setBackgroundColor(getResources().getColor(R.color.bgColor));
  }
  //默认选中第一个tab
  tabHost.setCurrentTab(0);
  //设置tab的切换监听
  tabHost.setOnTabChangedListener(new TabHost.OnTabChangeListener() {
   @Override
   public void onTabChanged(String tabId) {
    //可以在这里监听tab的切换
   }
  });
 }

 //tab的字体选择器
 ColorStateList mColorStateList;

 /**
  * 给Tab按钮设置图标和文字
  */
 private View getTabItemView(int index) {
  View view = getLayoutInflater().inflate(R.layout.view_tab_indicator, null);
  ImageView imageView = (ImageView) view.findViewById(R.id.iv_tab);
  TextView textView = (TextView) view.findViewById(R.id.tv_tab);
  //设置图片选择器
  imageView.setImageResource(mTabImage[index]);
  //设置字体选择器
  if (mColorStateList == null) {
   mColorStateList = getResources().
     getColorStateList(R.color.main_bottom_text_selector);
   textView.setTextColor(mColorStateList);
  }
  //设置tab的文字
  if (TextUtils.isEmpty(mTabTitle[index])) {
   //如果没有名称,则隐藏tab下的textView
   textView.setVisibility(View.GONE);
  } else {
   textView.setVisibility(View.VISIBLE);
   textView.setText(mTabTitle[index]);
  }
  return view;
 }

 @Override
 public void initListener() {

 }

 @Override
 public void initData() {

 }

 @Override
 public void reLoadData() {

 }

 @Override
 public void onClick(View v) {

 }

 @Override
 public MvpBasePresenter bindPresenter() {
  return null;
 }
}

最后附上字体选择器

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
 <item android:state_selected="false" android:color="@color/main_bottom_text_normal" />
 <item android:state_selected="true" android:color="@color/main_bottom_text_select" />
</selector>

图片选择器有5个,这里附上一个,其他类似:

<?xml version="1.0" encoding="utf-8"?>
<selector
 xmlns:android="http://schemas.android.com/apk/res/android">
 <item android:state_selected="false" android:drawable="@drawable/main_bottom_essence_normal" />
 <item android:state_selected="true" android:drawable="@drawable/main_bottom_essence_press" />
</selector>

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