错误：的'标题“”到“默认”或吸气剂

Question

我在Bookinfo.title，Bookinfo.author和Book.isbn变量得到这个错误在我的片段内更换Bookinfo.title变化的知名度。我不知道为什么。所有文档在尝试纠正时都会给我另一个错误。至于Bookinf，它还有另一个由getter和setter组成的类。我在BookDetailsFragment类中的单词Fragment中出现错误。错误表示将@SuppressLint'NewApi'添加到BookDetailsFragment。任何帮助将不胜感激谢谢。

这里是我的BookDetailsFragment代码：

import android.app.Fragment; 

public class BookDetailsFragment extends Fragment { 

@Override 
public View onCreateView(LayoutInflater inflater, ViewGroup container, 
     Bundle savedInstanceState) { 

    //View view = inflater.inflate(R.layout.book_details, container, false); 
    View view = inflater.inflate(R.layout.book_details, null); 


    System.out.println("BookDetailsActivity executed"); 

    //Defines the TextViews in R.layout.book_details 
    TextView bkTitle = (TextView)view.findViewById(R.id.bookTitle); 
    TextView bkAuth = (TextView)view.findViewById(R.id.bookAuthor); 
    TextView bkIsbn = (TextView)view.findViewById(R.id.bookISBN); 


    //Retrieve the bundle object passed from BuyFragTab 
    Bundle b = getArguments(); 


    //Getting the item's clicked position and setting corresponding details 

    bkTitle.setText("Title: " + Bookinfo.title[b.getInt("position")]); 
    bkAuth.setText("Author: " + Bookinfo.author[b.getInt("position")]); 
    bkIsbn.setText("ISBN:  " + Bookinfo.isbn[b.getInt("position")]); 

    return view; 
    } 

} 

这里是一个BookInfo类代码：

package com.skipster.BookBarter; 

public class Bookinfo { 
private String title; 
private String author; 
private String isbn; 


public Bookinfo(String title, String author, String isbn) { 
    this.title = title; 
    this.author = author; 
    this.isbn = isbn; 

      // TODO Auto-generated constructor stub 
    } 
    public String getTitle() { 
     return title; 
    } 
    public void setTitle(String title) { 
     this.title = title; 
    } 
    public String getAuthor() { 
     return author; 
    } 
    public void setAuthor(String author) { 
     this.author = author; 
    } 
    public String getIsbn() { 
     return isbn; 
    } 
    public void setIsbn(String isbn) { 
     this.isbn = isbn; 
    } 

    //returns all the previous variables to the program that made the call 
    @Override 
    public String toString() { 
     return title + " " + author + " " + isbn; 
    } 
} 

下面是BookDetailsActivity代码：

import android.os.Bundle; 
import android.app.Activity; 
import android.app.FragmentManager; 
import android.app.FragmentTransaction; 

public class BookDetailsActivity extends Activity { 

@Override 
public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 

    //setting the layout for this activity 
    setContentView(R.layout.book_details_activity_layout); 

    //get fragment manager for fragment related operations 
    FragmentManager fm = getFragmentManager(); 

    //get fragment transaction object, which can add, move or replace a fragmnt 
    FragmentTransaction ft = fm.beginTransaction(); 

    //instantiating the fragment BookDetailsFragment 
    BookDetailsFragment detailsFragment = new BookDetailsFragment(); 

    //creating a bundle object to pass the data (clicked item's position) 
    //from this activity to fragment 
    Bundle b = new Bundle(); 

    //setting the data to the bundle object from the Intent 
    b.putInt("position", getIntent().getIntExtra("position", 0)); 
    System.out.println("the bundle passed" + b); 

    //setting the bundle object to the fragment 
    detailsFragment.setArguments(b); 

    //adding the fragment to the fragment transaction 
    ft.add(R.id.book_details_fragment_container, detailsFragment); 

    //add the fragment transaction to backstack 
    ft.addToBackStack(null); 

    //Executing the transaction 
    ft.commit(); 
} 
} 

下面是该onClickListener代码开始意图：

bookLV.setOnItemClickListener(new OnItemClickListener() { 
     public void onItemClick(AdapterView<?> parent, View view, int position, 
       long id){ 

     String selectTitle, selectAuthor, selectIsbn = null; 

     //When item is clicked, show it's detailed view 
     Bookinfo bkRecs = (Bookinfo)parent.getItemAtPosition(position); 


     //Creating an intent object to start BookDetailsActivity 
     Intent bkIntent = new Intent("com.skipster.BookBarter.BOOKDETAILSACTIVITY"); 

     //Setting data (the clicked item's position to the intent 
     bkIntent.putExtra("position", position); 

     System.out.println("Data loaded for intent"); 
     //Start the activity 
     startActivity(bkIntent); 

     System.out.println("Intent activity started"); 
     } 
    }); 

Answer 1

片段类是在API中加入11看起来像你的minSDK版本比这位前辈。如果你想在一个旧的SDK使用的片段，你应该使用支持库，它给你的片段支持..

对于支持库参考：http://developer.android.com/tools/extras/support-library.html