我得到了java.lang.IllegalArgumentException：在嘗試使用viewpager時沒有找到id的視圖

Question

我在我的android項目中使用viewpager。在片段中，我需要打開一個pdf文件。我用庫來處理PDF文件打開。沒有pdf打開方法（read（）和open（））這工作正常。但是當我調用這兩個方法這讓我異常

以上這是我的主類

package com.android.pageviewers;  
    import java.util.ArrayList; 
    import java.util.List; 
    import android.content.Intent; 
    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; 

    public class PageViewActivity extends FragmentActivity implements Communicator{ 
    MyPageAdapter pageAdapter; 



public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { 
    View contentView = inflater.inflate(R.layout.activity_page_view, container, false); 
    List<Fragment> fragments = getFragments(); 
    pageAdapter = new MyPageAdapter(getSupportFragmentManager(), fragments);   
    ViewPager pager = (ViewPager)contentView.findViewById(R.id.pager); 
    pager.setAdapter(pageAdapter); 
    return contentView; 
} 


    private List<Fragment> getFragments(){ 
     List<Fragment> fList = new ArrayList<Fragment>(); 

     fList.add(MyFragment.newInstance("Fragment 1")); 
     fList.add(MyFragment.newInstance("Fragment 2")); 
     //fList.add(MyFragment3.newInstance("Fragment 3")); 

     return fList; 
    } 

    private class MyPageAdapter extends FragmentPagerAdapter { 
     private List<Fragment> fragments; 

     public MyPageAdapter(FragmentManager fm, List<Fragment> fragments) { 
      super(fm); 
      this.fragments = fragments; 
     } 
     @Override 
     public Fragment getItem(int position) { 
      return this.fragments.get(position); 
     } 

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

    @Override 
    public void viewPdf() { 

     //ShowPdf.read(); 

    } 
    } 


This is my fragment 

    package com.android.pageviewers; 

import java.io.File; 
import java.io.InputStream; 

import com.epapyrus.plugpdf.SimpleDocumentReader; 
import com.epapyrus.plugpdf.SimpleDocumentReaderListener; 
import com.epapyrus.plugpdf.SimpleReaderFactory; 
import com.epapyrus.plugpdf.core.viewer.DocumentState; 

import android.content.Intent; 
import android.content.res.AssetManager; 
import android.net.Uri; 
import android.os.Bundle; 
import android.os.Environment; 
import android.support.v4.app.Fragment; 
import android.util.Log; 
import android.view.LayoutInflater; 
import android.view.View; 
import android.view.ViewGroup; 
import android.widget.TextView; 

public class MyFragment extends Fragment { 
    public static final String EXTRA_MESSAGE = "EXTRA_MESSAGE"; 


    // create a listener for receiving provide pdf loading results 
      SimpleDocumentReaderListener m_listener = new 
SimpleDocumentReaderListener() { 

       @Override 
       public void onLoadFinish(DocumentState.OPEN state) { 
       } 
      }; 


    public static final MyFragment newInstance(String message) 
    { 
     MyFragment f = new MyFragment(); 
     Bundle bdl = new Bundle(1); 
     bdl.putString(EXTRA_MESSAGE, message); 
     f.setArguments(bdl); 

     return f; 
    } 

    @Override 
    public View onCreateView(LayoutInflater inflater, ViewGroup container, 
     Bundle savedInstanceState) { 
     String message = getArguments().getString(EXTRA_MESSAGE); 
     View v = inflater.inflate(R.layout.myfragment_layout, container, false); 
     TextView messageTextView = (TextView)v.findViewById(R.id.textView); 
     messageTextView.setText(message); 
     read(); 
     return v; 
    } 


    public void read(){ 

     String fileName = new String("1.pdf");  
     AssetManager am = getResources().getAssets(); 

     try { 
      InputStream is = am.open(fileName); 
      //SimpleDocumentReader.openFile(); 

      int size = is.available(); 
      if (size > 0) { 
       byte[] data = new byte[size]; 
       is.read(data); 
       open(data); 
      } 

      is.close(); 

     } catch (Exception ex) { 
      ex.printStackTrace(); 
     } 


    } 

    public void open(byte[] words) { 
     try {   

     // pdfviewer create. 
     SimpleDocumentReader viewer =  
    SimpleReaderFactory.createSimpleViewer(getActivity(), m_listener); 
     // pdf data load. 
     viewer.openData(words, words.length, ""); 

     } catch (Exception ex) { 
      Log.e("KS", "error ", ex); 
      ex.printStackTrace(); 
     } 
    } 


    } 

當我運行這個項目它給了我所提到的error.I已經添加了ID爲pageviewer

。

10-01 08:56:45.273: E/AndroidRuntime(2824): java.lang.IllegalArgumentException: No view found for id 0x7f0a003c (com.android.pageviewers:id/pager) for fragment MyFragment{41468878 #1 id=0x7f0a003c android:switcher:2131361852:1} 

這是我的佈局文件：

<RelativeLayout 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.support.v4.view.ViewPager 
    android:id="@+id/pager" 
    android:layout_width="fill_parent" 
    android:layout_height="fill_parent" /> 

</RelativeLayout> 

我從我的主類中刪除onCreate方法和該onCreateView.Now沒有任何exception.but它不顯示我的PDF文件，只是空白頁，我無法刷卡。

Answer 1

[編輯]

嘗試用以下onCreateView()更換你的onCreate()方法。你需要自己膨脹佈局。

public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { 
    View contentView = inflater.inflate(R.layout.activity_page_view, container, false); 
    List<Fragment> fragments = getFragments(); 
    pageAdapter = new MyPageAdapter(getSupportFragmentManager(), fragments);   
    ViewPager pager = (ViewPager)contentView.findViewById(R.id.pager); 
    pager.setAdapter(pageAdapter); 
    return contentView; 
}