55 Android Fragment_ViewPager 适配器 FragmentStatePagerAdapter



fragment_pager_list.xml  (加载到 LsitFragment 上)

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@android:drawable/gallery_thumb"
    android:orientation="vertical" >

    <TextView
        android:id="@+id/text"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:gravity="center_vertical|center_horizontal"
        android:text="@string/hello_world"
        android:textAppearance="?android:attr/textAppearanceMedium" />

    <!--
    The frame layout is here since we will be showing either
    the empty view or the list view.
    -->

    <FrameLayout
        android:layout_width="match_parent"
        android:layout_height="0dip"
        android:layout_weight="1" >

        <!--
             Here is the list. Since we are using a ListActivity, we
             have to call it "@android:id/list" so ListActivity will
             find it
        -->

        <ListView
            android:id="@android:id/list"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:drawSelectorOnTop="false" />

        <!-- Here is the view to show if the list is emtpy -->

        <TextView
            android:id="@android:id/empty"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:text="No items."
            android:textAppearance="?android:attr/textAppearanceMedium" />
    </FrameLayout>

</LinearLayout>

activity_main.xml (主布局文件)

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:gravity="center_horizontal"
    android:orientation="vertical"
    android:padding="4dip" >

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

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_weight="0"
        android:gravity="center"
        android:measureWithLargestChild="true"
        android:orientation="horizontal" >

        <Button
            android:id="@+id/goto_first"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="跳到首页" >
        </Button>

        <Button
            android:id="@+id/goto_last"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="跳到尾页" >
        </Button>
    </LinearLayout>

</LinearLayout>

MainActivity.java

package com.example.android_fragment_fragmentstatepageradapter;

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

import android.os.Bundle;
import android.app.Activity;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentActivity;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentStatePagerAdapter;
import android.support.v4.app.ListFragment;
import android.support.v4.view.ViewPager;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;

public class MainActivity extends FragmentActivity {

	private ViewPager viewPager;
	static final int NUM_ITEMS=10;//定义一共有10页
	private Button button1;
	private Button button2;
	private MyAdapter adapter;
	@Override
	protected void onCreate(Bundle savedInstanceState)  {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		viewPager=(ViewPager)this.findViewById(R.id.pager);
		adapter=new MyAdapter(getSupportFragmentManager());
		button1=(Button)findViewById(R.id.goto_first);
		button1.setOnClickListener(new View.OnClickListener() {
			
			@Override
			public void onClick(View v) {
				// TODO Auto-generated method stub
				viewPager.setCurrentItem(0);
			}
		});
		button2=(Button)findViewById(R.id.goto_last);
		
		button2.setOnClickListener(new View.OnClickListener() {
			
			@Override
			public void onClick(View v) {
				// TODO Auto-generated method stub
				viewPager.setCurrentItem(NUM_ITEMS-1);
			}
		});
		
		viewPager.setAdapter(adapter);
	}
	/**
	 * 填充适配器数据
	 * @author Administrator
	 *
	 */
	public static class MyAdapter extends FragmentStatePagerAdapter
	{

		public MyAdapter(FragmentManager fm) {
			super(fm);
			
		}

		@Override
		public Fragment getItem(int arg0) {
			// TODO Auto-generated method stub
			return ArrayListFragment.getIntances(arg0);
		}

		@Override
		public int getCount() {
			// TODO Auto-generated method stub
			return NUM_ITEMS;
		}
		
	}
	
	public static  class ArrayListFragment extends ListFragment{
		int num;
		static ArrayListFragment getIntances(int num)
		{
			ArrayListFragment arrayListFragment =new ArrayListFragment();
			Bundle bundle=new Bundle();
			bundle.putInt("num", num);
			arrayListFragment.setArguments(bundle);
			return arrayListFragment;
		}
		
		@Override
		public void onActivityCreated(Bundle savedInstanceState) {
			// TODO Auto-generated method stub
			super.onActivityCreated(savedInstanceState);
			
			setListAdapter(new ArrayAdapter<String>(getActivity(), android.R.layout.simple_list_item_1, getData()));
		}
		
		public List<String> getData(){
			 List<String> list=new ArrayList<String>();
			 for(int i=0;i<20;i++)
			 {
				 list.add("Item"+i);
			 }
			 return list;
		}
		
		@Override
		public void onCreate(Bundle savedInstanceState) {
			// TODO Auto-generated method stub
			super.onCreate(savedInstanceState);
			
			num=getArguments() !=null?getArguments().getInt("num"):1;
		}
		@Override
		public View onCreateView(LayoutInflater inflater, ViewGroup container,
				Bundle savedInstanceState) {
			View view=inflater.inflate(R.layout.fragment_pager_list, null);
			TextView tv=(TextView)view.findViewById(R.id.text);
		    tv.setText("Frament #"+num );
			return view;
		}
		
		@Override
		public void onPause() {
			// TODO Auto-generated method stub
			super.onPause();
		}
		
		@Override
		public void onListItemClick(ListView l, View v, int position, long id) {
			// TODO Auto-generated method stub
			Toast.makeText(getActivity(), "clicked", 1).show();
		}
	} 

	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		// Inflate the menu; this adds items to the action bar if it is present.
		getMenuInflater().inflate(R.menu.main, menu);
		return true;
	}

}