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怎么样使用FragmentTabHost+Fragment+viewpager实现滑动分页功能?

2016-08-29 19:53:33 来源:www.45fan.com 【

怎么样使用FragmentTabHost+Fragment+viewpager实现滑动分页功能?

之前分页效果一直用TabActivity+TabHost,但是android3.0后就不在推荐使用了,而是推荐使用Fragment,经过研究加参考其他朋友代码实现了滑动分页的效果,代码简单附上。

主页面的布局文件 main_tab_layout.xml , 使用ViewPager+FragmentTabHost

 

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
  android:layout_width="fill_parent"
  android:layout_height="fill_parent"
  android:orientation="vertical" >

   <android.support.v4.view.ViewPager
    android:id="@+id/pager"
    android:layout_width="match_parent"
    android:layout_height="0dp"
    android:layout_weight="1" />

  <FrameLayout
    android:visibility="gone"
    android:layout_width="match_parent"
    android:layout_height="0dp"
    android:layout_weight="1" />

  <android.support.v4.app.FragmentTabHost
    android:id="@android:id/tabhost"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:background="@drawable/maintab_toolbar_bg" >

    <FrameLayout
      android:id="@android:id/tabcontent"
      android:layout_width="0dp"
      android:layout_height="0dp"
      android:layout_weight="0" />
  </android.support.v4.app.FragmentTabHost>

</LinearLayout>

tab按钮的不加文件

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<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
  android:layout_width="wrap_content"
  android:layout_height="wrap_content"
  android:gravity="center"
  android:orientation="vertical" >

  <ImageView
    android:id="@+id/imageview"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:focusable="false"
    android:padding="3dp" 
    android:src="@drawable/tab_home_btn">
  </ImageView>

  <TextView
    android:id="@+id/textview"    
    android:layout_width="wrap_content"
    android:layout_height="wrap_content" 
    android:text="首页"
    android:textSize="10sp"
    android:textColor="#ffffff">
  </TextView>

</LinearLayout>

主页面 MainActivity

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package com.yangyu.mycustomtab02;

import java.util.ArrayList;
import java.util.List;

import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentActivity;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;
import android.support.v4.app.FragmentTabHost;
import android.support.v4.view.PagerAdapter;
import android.support.v4.view.ViewPager;
import android.support.v4.view.ViewPager.OnPageChangeListener;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.TabWidget;
import android.widget.TabHost.OnTabChangeListener;
import android.widget.TabHost.TabSpec;
import android.widget.TextView;

/**
 * @author yangyu 功能描述:自定义TabHost ——使用FragmentTabHost+Fragment+viewpager 实现滑动分页
 */
public class MainTabActivity extends FragmentActivity {
  // 定义FragmentTabHost对象
  private FragmentTabHost mTabHost;
  // 定义一个布局
  private LayoutInflater layoutInflater;
  // 定义数组来存放Fragment界面
  private Class fragmentArray[] = { FragmentPage1.class, FragmentPage2.class,
      FragmentPage3.class, FragmentPage4.class, FragmentPage5.class };
  // 定义数组来存放按钮图片
  private int mImageViewArray[] = { R.drawable.tab_home_btn,
      R.drawable.tab_message_btn, R.drawable.tab_selfinfo_btn,
      R.drawable.tab_square_btn, R.drawable.tab_more_btn };
  // Tab选项卡的文字
  private String mTextviewArray[] = { "首页", "消息", "好友", "广场", "更多" };
  private ViewPager vp;
  private List<Fragment> list = new ArrayList<Fragment>();
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main_tab_layout);
    initView();
    initPager();
  }
  /**
   * 初始化组件
   */
  private void initView() {
     vp = (ViewPager) findViewById(R.id.pager);
     vp.setOnPageChangeListener(new ViewPagerListener());
    // MyAdapter adapter = new MyAdapter();
    // vp.setAdapter(adapter);
    // 实例化布局对象
    layoutInflater = LayoutInflater.from(this);
    // 实例化TabHost对象,得到TabHost
    mTabHost = (FragmentTabHost) findViewById(android.R.id.tabhost);
    // 得到对象后,初始化
    mTabHost.setup(this, getSupportFragmentManager(), R.id.pager);
     mTabHost.setOnTabChangedListener(new TabHostListener());
    // 得到fragment的个数
    int count = fragmentArray.length;

    for (int i = 0; i < count; i++) {
      // 为每一个Tab按钮设置图标、文字和内容
      TabSpec tabSpec = mTabHost.newTabSpec(mTextviewArray[i])
          .setIndicator(getTabItemView(i));
      // 将Tab按钮添加进Tab选项卡中
      mTabHost.addTab(tabSpec, fragmentArray[i], null);
      mTabHost.setTag(i);
      // 设置Tab按钮的背景
      mTabHost.getTabWidget().getChildAt(i)
          .setBackgroundResource(R.drawable.selector_tab_background);
    }
  }
  private void initPager() {
    FragmentPage1 p1 = new FragmentPage1();
    FragmentPage2 p2 = new FragmentPage2();
    FragmentPage3 p3 = new FragmentPage3();
    FragmentPage4 p4 = new FragmentPage4();
    FragmentPage5 p5 = new FragmentPage5();
    list.add(p1);
    list.add(p2);
    list.add(p3);
    list.add(p4);
    list.add(p5);
    vp.setAdapter(new MyAdapter(getSupportFragmentManager()));
  }
  /**
   * 给Tab按钮设置图标和文字
   */
  private View getTabItemView(int index) {
    View view = layoutInflater.inflate(R.layout.tab_item_view, null);
    ImageView imageView = (ImageView) view.findViewById(R.id.imageview);
    imageView.setImageResource(mImageViewArray[index]);
    TextView textView = (TextView) view.findViewById(R.id.textview);
    textView.setText(mTextviewArray[index]);
    return view;
  }

  private class TabHostListener implements OnTabChangeListener {
    @Override
    public void onTabChanged(String tabId) {
      int position = mTabHost.getCurrentTab();
      vp.setCurrentItem(position);
    }
  }
  class MyAdapter extends FragmentPagerAdapter {

    public MyAdapter(FragmentManager fm) {
      super(fm);
      // TODO Auto-generated constructor stub
    }

    @Override
    public Fragment getItem(int arg0) {
      return list.get(arg0);
    }

    @Override
    public int getCount() {
      return list.size();
    }

  }

  class ViewPagerListener implements OnPageChangeListener {
    @Override
    public void onPageScrollStateChanged(int arg0) {

    }

    @Override
    public void onPageScrolled(int arg0, float arg1, int arg2) {

    }

    @Override
    public void onPageSelected(int index) {
      TabWidget widget = mTabHost.getTabWidget();
      int oldFocusability = widget.getDescendantFocusability();
      widget.setDescendantFocusability(ViewGroup.FOCUS_BLOCK_DESCENDANTS);
      mTabHost.setCurrentTab(index);
      widget.setDescendantFocusability(oldFocusability);
    }
  }
}

几个Fragment就很简单了, 只显示一直图片

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package com.yangyu.mycustomtab02;

import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;

public class FragmentPage1 extends Fragment{

  @Override
  public View onCreateView(LayoutInflater inflater, ViewGroup container,
      Bundle savedInstanceState) {

    return inflater.inflate(R.layout.fragment_1, null);   
  }  
}
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<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android&q

本文地址:http://www.45fan.com/a/luyou/69507.html
Tags: 实现 滑动
编辑:路饭网
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