使用android-support-v4.jar出现的问题

看看是不是你导的android-support-v4.jar有误啊，试试这样的方法：首先在Project->properties->Java Build Path->Libraries->Add External Jars中加入sdk目录下的extras/android/support/v4/android-support-v4.jar（如果找不到，则需要用sdk manager下载android support package）。

再仔细看看报错的第一行，定位到你的代码行数，确定是不是你的代码的原因：at android.support.v4.app.FragmentPagerAdapter.instantiateItem(FragmentPagerAdapter.java:103)

package com.tcl.globlelive.adapter;import android.os.Parcelable;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;
import android.util.Log;
import android.view.View;
import android.view.ViewGroup;/**
* A PagerAdapter that wraps around another PagerAdapter to handle paging
* wrap-around.
*/
public class InfinitePagerAdapter extends FragmentPagerAdapter {    private static final String TAG = "InfinitePagerAdapter";
    private static final boolean DEBUG = true;    private FragmentPagerAdapter adapter;    public InfinitePagerAdapter(FragmentManager fm, FragmentPagerAdapter adapter) {
        super(fm);
        this.adapter = adapter;
    }
        @Override
    public int getCount() {
        // warning: scrolling to very high values (1,000,000+) results in
        // strange drawing behaviour
        return Integer.MAX_VALUE;
    }    /**
     * @return the {@link #getCount()} result of the wrapped adapter
     */
    public int getRealCount() {
        return adapter.getCount();
    }    @Override
    public Object instantiateItem(ViewGroup container, int position) {
        int virtualPosition = position % getRealCount();
        debug("instantiateItem: real position: " + position);
        debug("instantiateItem: virtual position: " + virtualPosition);        // only expose virtual position to the inner adapter
        return adapter.instantiateItem(container, virtualPosition);
    }    @Override
    public void destroyItem(ViewGroup container, int position, Object object) {
        int virtualPosition = position % getRealCount();
        debug("destroyItem: real position: " + position);
        debug("destroyItem: virtual position: " + virtualPosition);        // only expose virtual position to the inner adapter
        adapter.destroyItem(container, virtualPosition, object);
    }

    //for update
    @Override
    public int getItemPosition(Object object) {
        // TODO Auto-generated method stub
        return POSITION_NONE;
    }
    /*
     * Delegate rest of methods directly to the inner adapter.
     */    @Override
    public void finishUpdate(ViewGroup container) {
        adapter.finishUpdate(container);
    }    @Override
    public boolean isViewFromObject(View view, Object object) {
        return adapter.isViewFromObject(view, object);
    }    @Override
    public void restoreState(Parcelable bundle, ClassLoader classLoader) {
        adapter.restoreState(bundle, classLoader);
    }    @Override
    public Parcelable saveState() {
        return adapter.saveState();
    }    @Override
    public void startUpdate(ViewGroup container) {
        adapter.startUpdate(container);
    }    /*
     * End delegation
     */    private void debug(String message) {
        if (DEBUG) {
            Log.d(TAG, message);
        }
    }    @Override
    public Fragment getItem(int arg0) {
        // TODO Auto-generated method stub
        return adapter.getItem(arg0);
    }
}
继承的类重写了instantiateItem方法，在这个方法中报错，这里是进入到源码了吧

/*
* Copyright (C) 2011 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/package android.support.v4.app;import android.os.Parcelable;
import android.support.v4.view.PagerAdapter;
import android.util.Log;
import android.view.View;
import android.view.ViewGroup;/**
* Implementation of {@link android.support.v4.view.PagerAdapter} that
* represents each page as a {@link Fragment} that is persistently
* kept in the fragment manager as long as the user can return to the page.
*
* This version of the pager is best for use when there are a handful of
* typically more static fragments to be paged through, such as a set of tabs.
* The fragment of each page the user visits will be kept in memory, though its
* view hierarchy may be destroyed when not visible. This can result in using
* a significant amount of memory since fragment instances can hold on to an
* arbitrary amount of state. For larger sets of pages, consider
* {@link FragmentStatePagerAdapter}.
*
* When using FragmentPagerAdapter the host ViewPager must have a
* valid ID set.
*
* Subclasses only need to implement {@link #getItem(int)}
* and {@link #getCount()} to have a working adapter.
*
* Here is an example implementation of a pager containing fragments of
* lists:
*
* {@sample development/samples/Support4Demos/src/com/example/android/supportv4/app/FragmentPagerSupport.java
* complete}
*
* The <code>R.layout.fragment_pager</code> resource of the top-level fragment is:
*
* {@sample development/samples/Support4Demos/res/layout/fragment_pager.xml
* complete}
*
* The <code>R.layout.fragment_pager_list</code> resource containing each
* individual fragment's layout is:
*
* {@sample development/samples/Support4Demos/res/layout/fragment_pager_list.xml
* complete}
*/
public abstract class FragmentPagerAdapter extends PagerAdapter {
 private static final String TAG = "FragmentPagerAdapter";
 private static final boolean DEBUG = false; private final FragmentManager mFragmentManager;
 private FragmentTransaction mCurTransaction = null;
 private Fragment mCurrentPrimaryItem = null; public FragmentPagerAdapter(FragmentManager fm) {
 mFragmentManager = fm;
 } /**
 * Return the Fragment associated with a specified position.
 */
 public abstract Fragment getItem(int position); @Override
 public void startUpdate(ViewGroup container) {
 } @Override
 public Object instantiateItem(ViewGroup container, int position) {
 if (mCurTransaction == null) {
 mCurTransaction = mFragmentManager.beginTransaction();
 } final long itemId = getItemId(position); // Do we already have this fragment?
 String name = makeFragmentName(container.getId(), itemId);
 Fragment fragment = mFragmentManager.findFragmentByTag(name);
 if (fragment != null) {
 if (DEBUG) Log.v(TAG, "Attaching item #" + itemId + ": f=" + fragment);
 mCurTransaction.attach(fragment);
 } else {
 fragment = getItem(position);
 if (DEBUG) Log.v(TAG, "Adding item #" + itemId + ": f=" + fragment);
 mCurTransaction.add(container.getId(), fragment,
 makeFragmentName(container.getId(), itemId));
 }
 if (fragment != mCurrentPrimaryItem) {
 //在这里报错了
 fragment.setMenuVisibility(false);
 fragment.setUserVisibleHint(false);
 } return fragment;
 } @Override
 public void destroyItem(ViewGroup container, int position, Object object) {
 if (mCurTransaction == null) {
 mCurTransaction = mFragmentManager.beginTransaction();
 }
 if (DEBUG) Log.v(TAG, "Detaching item #" + getItemId(position) + ": f=" + object
 + " v=" + ((Fragment)object).getView());
 mCurTransaction.detach((Fragment)object);
 } @Override
 public void setPrimaryItem(ViewGroup container, int position, Object object) {
 Fragment fragment = (Fragment)object;
 if (fragment != mCurrentPrimaryItem) {
 if (mCurrentPrimaryItem != null) {
 mCurrentPrimaryItem.setMenuVisibility(false);
 mCurrentPrimaryItem.setUserVisibleHint(false);
 }
 if (fragment != null) {
 fragment.setMenuVisibility(true);
 fragment.setUserVisibleHint(true);
 }
 mCurrentPrimaryItem = fragment;
 }
 } @Override
 public void finishUpdate(ViewGroup container) {
 if (mCurTransaction != null) {
 mCurTransaction.commitAllowingStateLoss();
 mCurTransaction = null;
 mFragmentManager.executePendingTransactions();
 }
 } @Override
 public boolean isViewFromObject(View view, Object object) {
 return ((Fragment)object).getView() == view;
 } @Override
 public Parcelable saveState() {
 return null;
 } @Override
 public void restoreState(Parcelable state, ClassLoader loader) {
 } /**
 * Return a unique identifier for the item at the given position.
 *
 * The default implementation returns the given position.
 * Subclasses should override this method if the positions of items can change.
 *
 * @param position Position within this adapter
 * @return Unique identifier for the item at position
 */
 public long getItemId(int position) {
 return position;
 } private static String makeFragmentName(int viewId, long id) {
 return "android:switcher:" + viewId + ":" + id;
 }
}

在源码的@Override
    public Object instantiateItem(ViewGroup container, int position) {
        if (mCurTransaction == null) {
            mCurTransaction = mFragmentManager.beginTransaction();
        }

        final long itemId = getItemId(position);

        // Do we already have this fragment?
        String name = makeFragmentName(container.getId(), itemId);
        Fragment fragment = mFragmentManager.findFragmentByTag(name);
        if (fragment != null) {
            if (DEBUG) Log.v(TAG, "Attaching item #" + itemId + ": f=" + fragment);
            mCurTransaction.attach(fragment);
        } else {
            fragment = getItem(position);
            if (DEBUG) Log.v(TAG, "Adding item #" + itemId + ": f=" + fragment);
            mCurTransaction.add(container.getId(), fragment,
                    makeFragmentName(container.getId(), itemId));
        }
        if (fragment != mCurrentPrimaryItem) {
             //在这里报错了
            fragment.setMenuVisibility(false);
            fragment.setUserVisibleHint(false);
        }

        return fragment;
    } fragment.setMenuVisibility(false);报错

调试易

使用android-support-v4.jar出现的问题

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