20 ViewPager demo5,6:FragmentAdapter 导航数据

Demo5

文件结构：

MainActivity.java

package com.qf.day20_viewpager_demo5;

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

import android.graphics.Color;
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.view.ViewPager;
import android.support.v4.view.ViewPager.OnPageChangeListener;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.LinearLayout;
import android.widget.TextView;

import com.qf.day20_viewpager_demo5.fragment.MyFragment;

public class MainActivity extends FragmentActivity {

    private ViewPager viewPager;

    private List<Fragment> list;

    private TextView[]tvs;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        viewPager = (ViewPager) findViewById(R.id.viewPager);

        initTab();

        //数据源  Fragment
        initData();
        //adapter
        viewPager.setAdapter(new MyFragmentPagerAdapter(getSupportFragmentManager()));
        viewPager.setOnPageChangeListener(new OnPageChangeListener() {

            @Override
            public void onPageSelected(int arg0) {
                // TODO Auto-generated method stub
                for(int i=0;i<3;i++){
                    tvs[i].setBackgroundColor(Color.BLUE);
                }

                tvs[arg0].setBackgroundColor(Color.RED);
            }

            @Override
            public void onPageScrolled(int arg0, float arg1, int arg2) {
                // TODO Auto-generated method stub

            }

            @Override
            public void onPageScrollStateChanged(int arg0) {
                // TODO Auto-generated method stub

            }
        });

    }
    //导航书签
    public void initTab() {
        tvs = new TextView[3];
        LinearLayout layout = (LinearLayout) findViewById(R.id.ll);
        for(int i=0;i<3;i++){
            tvs[i] = (TextView) layout.getChildAt(i);
            tvs[i].setBackgroundColor(Color.BLUE);
            tvs[i].setTag(i);
            tvs[i].setOnClickListener(new OnClickListener() {

                @Override
                public void onClick(View v) {
                    // TODO Auto-generated method stub
                    viewPager.setCurrentItem((Integer)v.getTag());
                }
            });
        }
        tvs[0].setBackgroundColor(Color.RED);
    }

    public void initData() {
        list = new ArrayList<Fragment>();

        MyFragment myFragment1 = new MyFragment();
        Bundle bundle = new Bundle();
        bundle.putInt("index", 1);
        myFragment1.setArguments(bundle);

        MyFragment myFragment2 = new MyFragment();
        Bundle bundle1 = new Bundle();
        bundle1.putInt("index", 2);
        myFragment2.setArguments(bundle1);

        MyFragment myFragment3 = new MyFragment();
        Bundle bundle2 = new Bundle();
        bundle2.putInt("index", 3);
        myFragment3.setArguments(bundle2);

        list.add(myFragment1);
        list.add(myFragment2);
        list.add(myFragment3);
    }

    /**
     * 自定义的Adapter
     * @author sxy
     *
     */
    public class MyFragmentPagerAdapter extends FragmentPagerAdapter{

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

        /**
         * 根据指定的下标  返回对应的Fragmengt对象
         */
        @Override
        public Fragment getItem(int arg0) {
            // TODO Auto-generated method stub
            return list.get(arg0);
        }

        /**
         * Fragment的数量
         */
        @Override
        public int getCount() {
            // TODO Auto-generated method stub
            return list.size();
        }

    }



}

MyFragment.java

package com.qf.day20_viewpager_demo5.fragment;

import com.qf.day20_viewpager_demo5.R;

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

public class MyFragment extends Fragment {

    private TextView tv;

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
            Bundle savedInstanceState) {
        // TODO Auto-generated method stub

        View view = inflater.inflate(R.layout.layout_fragment, container, false);
        tv  = (TextView) view.findViewById(R.id.tv);

        Bundle bundle = getArguments();
        int index = bundle.getInt("index");

        switch (index) {
        case 1:
            tv.setText("新闻");
            break;
        case 2:
            tv.setText("娱乐");
            break;
        case 3:
            tv.setText("段子");
            break;

        default:
            break;
        }

        return view;
    }

}

activity_main.xml

<LinearLayout 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"
   android:orientation="vertical"
    tools:context=".MainActivity" >

    <LinearLayout 
        android:id="@+id/ll"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal"
        >
        <TextView 
            android:id="@+id/tv_new"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:gravity="center"
            android:text="新闻"
            />
        <TextView 
            android:id="@+id/tv_happy"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
             android:gravity="center"
            android:text="娱乐"
            />
        <TextView 
            android:id="@+id/tv_dz"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
             android:gravity="center"
            android:text="段子"
            />
    </LinearLayout>

    <android.support.v4.view.ViewPager
        android:id="@+id/viewPager"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        />

</LinearLayout>

layout_fragment.xml

<?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" >

    <TextView 
        android:id="@+id/tv"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textSize="20sp"
        android:textColor="#f00"
        />


</LinearLayout>

---

Demo6

MainActivity.java

package com.qf.day20_viewpager_demo5;

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

import android.app.ActionBar;
import android.app.ActionBar.Tab;
import android.app.ActionBar.TabListener;
import android.app.FragmentTransaction;
import android.graphics.Color;
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.view.ViewPager;
import android.support.v4.view.ViewPager.OnPageChangeListener;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.LinearLayout;
import android.widget.TextView;

import com.qf.day20_viewpager_demo5.fragment.MyFragment;

public class MainActivity extends FragmentActivity implements TabListener{

    private ViewPager viewPager;

    private List<Fragment> list;

    private TextView[]tvs;

    private ActionBar actionBar;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        viewPager = (ViewPager) findViewById(R.id.viewPager);

        actionBar = getActionBar();

        actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
        actionBar.addTab(actionBar.newTab().setText("新闻").setTabListener(this));
        actionBar.addTab(actionBar.newTab().setText("娱乐").setTabListener(this));
        actionBar.addTab(actionBar.newTab().setText("段子").setTabListener(this));

        //数据源  Fragment
        initData();
        //adapter
        viewPager.setAdapter(new MyFragmentPagerAdapter(getSupportFragmentManager()));
        viewPager.setOnPageChangeListener(new OnPageChangeListener() {

            @Override
            public void onPageSelected(int arg0) {
//              // TODO Auto-generated method stub
//              for(int i=0;i<3;i++){
//                  tvs[i].setBackgroundColor(Color.BLUE);
//              }
//              
//              tvs[arg0].setBackgroundColor(Color.RED);

                //ViewPager绑定ActionBar   
                actionBar.setSelectedNavigationItem(arg0);
            }

            @Override
            public void onPageScrolled(int arg0, float arg1, int arg2) {
                // TODO Auto-generated method stub

            }

            @Override
            public void onPageScrollStateChanged(int arg0) {
                // TODO Auto-generated method stub

            }
        });

    }
//  //导航书签
//  public void initTab() {
//      tvs = new TextView[3];
//      LinearLayout layout = (LinearLayout) findViewById(R.id.ll);
//      for(int i=0;i<3;i++){
//          tvs[i] = (TextView) layout.getChildAt(i);
//          tvs[i].setBackgroundColor(Color.BLUE);
//          tvs[i].setTag(i);
//          tvs[i].setOnClickListener(new OnClickListener() {
//              
//              @Override
//              public void onClick(View v) {
//                  // TODO Auto-generated method stub
//                  viewPager.setCurrentItem((Integer)v.getTag());
//              }
//          });
//      }
//      tvs[0].setBackgroundColor(Color.RED);
//  }

    public void initData() {
        list = new ArrayList<Fragment>();

        MyFragment myFragment1 = new MyFragment();
        Bundle bundle = new Bundle();
        bundle.putInt("index", 1);
        myFragment1.setArguments(bundle);

        MyFragment myFragment2 = new MyFragment();
        Bundle bundle1 = new Bundle();
        bundle1.putInt("index", 2);
        myFragment2.setArguments(bundle1);

        MyFragment myFragment3 = new MyFragment();
        Bundle bundle2 = new Bundle();
        bundle2.putInt("index", 3);
        myFragment3.setArguments(bundle2);

        list.add(myFragment1);
        list.add(myFragment2);
        list.add(myFragment3);
    }

    /**
     * 自定义的Adapter
     * @author sxy
     *
     */
    public class MyFragmentPagerAdapter extends FragmentPagerAdapter{

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

        /**
         * 根据指定的下标  返回对应的Fragmengt对象
         */
        @Override
        public Fragment getItem(int arg0) {
            // TODO Auto-generated method stub
            return list.get(arg0);
        }

        /**
         * Fragment的数量
         */
        @Override
        public int getCount() {
            // TODO Auto-generated method stub
            return list.size();
        }

    }

    @Override
    public void onTabReselected(Tab tab, FragmentTransaction ft) {
        // TODO Auto-generated method stub

    }
    @Override
    public void onTabSelected(Tab tab, FragmentTransaction ft) {
        // TODO Auto-generated method stub
        //Tab绑定ViewPager
        viewPager.setCurrentItem(tab.getPosition());
    }
    @Override
    public void onTabUnselected(Tab tab, FragmentTransaction ft) {
        // TODO Auto-generated method stub

    }



}

MyFragment.java

package com.qf.day20_viewpager_demo5.fragment;

import com.qf.day20_viewpager_demo5.R;

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

public class MyFragment extends Fragment {

    private TextView tv;

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
            Bundle savedInstanceState) {
        // TODO Auto-generated method stub

        View view = inflater.inflate(R.layout.layout_fragment, container, false);
        tv  = (TextView) view.findViewById(R.id.tv);

        Bundle bundle = getArguments();
        int index = bundle.getInt("index");

        switch (index) {
        case 1:
            tv.setText("新闻");
            break;
        case 2:
            tv.setText("娱乐");
            break;
        case 3:
            tv.setText("段子");
            break;

        default:
            break;
        }

        return view;
    }

}

activity_main.xml

<LinearLayout 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"
   android:orientation="vertical"
    tools:context=".MainActivity" >


    <android.support.v4.view.ViewPager
        android:id="@+id/viewPager"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        />

</LinearLayout>

layout_fragment.xml

<?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" >

    <TextView 
        android:id="@+id/tv"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textSize="20sp"
        android:textColor="#f00"
        />


</LinearLayout>