这个例子是按照官网上的例子写的，有点抄袭的嫌疑，但是自己单独写一下会加深自己的印象。
首先是MainAcitivity.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" android:paddingBottom="@dimen/activity_vertical_margin" android:paddingLeft="@dimen/activity_horizontal_margin" android:paddingRight="@dimen/activity_horizontal_margin" android:paddingTop="@dimen/activity_vertical_margin" tools:context=".MainActivity"> <android.support.v4.view.ViewPager android:translationZ="10dp" android:elevation="10dp" android:id="@+id/view_pager" android:layout_width="match_parent" android:layout_height="0dp" android:layout_weight="1" /> <LinearLayout android:layout_width="match_parent" android:layout_height="0dp" android:layout_weight="1" android:gravity="center" android:orientation="vertical"> <Button android:id="@+id/go_to_first_item" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_margin="10dp" android:padding="10dp" android:text="@string/first" android:textAllCaps="false" /> <Button android:id="@+id/go_to_last_item" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_margin="10dp" android:padding="10dp" android:text="@string/last" android:textAllCaps="false" /> </LinearLayout> </LinearLayout>
布局很简单，就是一个ViewPager加上一个LinearLayout
然后ViewPager中的item的布局，这里的ViewPager使用的adapter是FragmentStatePagerAdatper
<?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/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" /> <FrameLayout android:layout_width="match_parent" android:layout_height="0dp" android:layout_weight="1"> <ListView android:id="@android:id/list" android:layout_width="match_parent" android:layout_height="match_parent" /> <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>
然后是MainAcitivity的代码：
package com.example.crazykids.customsizeviewpager; import android.os.Bundle; import android.support.v4.app.Fragment; 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.support.v7.app.AppCompatActivity; import android.util.Log; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.ArrayAdapter; import android.widget.Button; import android.widget.ListView; import android.widget.TextView; public class MainActivity extends AppCompatActivity { static final int NUM_ITEMS = 10; private ViewPager mPager; private MyAdapter mAdapter; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); mAdapter = new MyAdapter(getSupportFragmentManager()); mPager = (ViewPager) findViewById(R.id.view_pager); mPager.setAdapter(mAdapter); mPager.setPageMargin(10); mPager.setPageMarginDrawable(android.R.color.background_dark); Button button = (Button) findViewById(R.id.go_to_first_item); button.setOnClickListener(new View.OnClickListener() { public void onClick(View v) { mPager.setCurrentItem(0); } }); button = (Button) findViewById(R.id.go_to_last_item); button.setOnClickListener(new View.OnClickListener() { public void onClick(View v) { mPager.setCurrentItem(NUM_ITEMS - 1); } }); } public static class MyAdapter extends FragmentStatePagerAdapter { @Override public float getPageWidth(int position) { return 0.2f; } @Override public CharSequence getPageTitle(int position) { return position + ""; } public MyAdapter(FragmentManager fm) { super(fm); } @Override public Fragment getItem(int position) { return MyListFragment.getInstance(position); } @Override public int getCount() { return NUM_ITEMS; } } public static class MyListFragment extends ListFragment { private int mNum; public static MyListFragment getInstance(int position) { MyListFragment fragment = new MyListFragment(); Bundle args = new Bundle(); args.putInt("position", position); fragment.setArguments(args); return fragment; } @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); mNum = getArguments() == null ? 1 : getArguments().getInt("position"); } @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View view = inflater.inflate(R.layout.fragment_page_item, container, false); TextView text = (TextView) view.findViewById(R.id.text); text.setText("Fragment # " + mNum); return view; } @Override public void onViewCreated(View view, Bundle savedInstanceState) { super.onViewCreated(view, savedInstanceState); setListAdapter( new ArrayAdapter<String>(getActivity(), android.R.layout.simple_list_item_1, MyArrays.arrays)); } @Override public void onListItemClick(ListView l, View v, int position, long id) { Log.i("FragmentList", "Item clicked: " + id); } } }
这里的fragment继承自ListFragment，在布局文件中ListView的id要设置成android:id/list，然后还有一个id为android:id/empty的textview，当list的adapter的数据为空时，
fragment为显示这个textview。
然后在FragmentStatePagerAdapter中有个getPageSize()的方法，这个方法是制定viewPager中的每个item占整个屏幕的比例，适当的设置这个值可以让viewpager中一次显示多个页面。
下面是效果图：
原文：http://www.cnblogs.com/crazykids/p/4870567.html
