Android listview显示问题，求大神指点

[qq_19817377]

在用listview显示sqlite数据库数据的时候，没能正常显示出具体数据，而是显示出了一个位置信息。仔细核对了一下代码，没有发现明显的错误，在线急等大神回复，跪谢。

业务类

public class Book {

private String b_num;
private String ISBN;
private String borrowed;
private String ordered;
private String introduction;

public Book(String b_num, String ISBN, String borrowed, String ordered,
		String introduction) {
	
	this.b_num = b_num;
	this.ISBN = ISBN;
	this.borrowed = borrowed;
	this.ordered = ordered;
	this.introduction = introduction;
}

public Book() {
	
}

public String getB_num() {
	return b_num;
}
public void setB_num(String b_num) {
	this.b_num = b_num;
}
public String getISBN() {
	return ISBN;
}
public void setISBN(String iSBN) {
	ISBN = iSBN;
}
public String getBorrowed() {
	return borrowed;
}
public void setBorrowed(String borrowed) {
	this.borrowed = borrowed;
}
public String getOrdered() {
	return ordered;
}
public void setOrdered(String ordered) {
	this.ordered = ordered;
}
public String getIntroduction() {
	return introduction;
}
public void setIntroduction(String introduction) {
	this.introduction = introduction;
}

}

model类

public class BookDao {

private DBUtil helper;

public BookDao(Context context)
{
	helper=new DBUtil(context);
}

public List<Book> findall()
{
	SQLiteDatabase db=helper.getReadableDatabase();
	List<Book> books=new ArrayList<Book>();
	String sql="select * from book_informathion";
	
	Cursor cursor=db.rawQuery(sql, null);
	while (cursor.moveToNext()) {
		String b_num=cursor.getString(0);
		String ISBN=cursor.getString(1);
		String borrowed=cursor.getString(2);
		String ordered=cursor.getString(3);
		String introduction=cursor.getString(4);
		Book book=new Book(b_num, ISBN, borrowed, ordered, introduction);
		
		books.add(book);
		System.out.println(books);
	}
	
	cursor.close();
	db.close();
	return books;
}

}

View类

public class self_query extends Activity {

    private ListView lv;
	private List<Book> books;
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		
		super.onCreate(savedInstanceState);
		setContentView(R.layout.self_query);
		
        BookDao dao=new BookDao(this);
		books=dao.findall();
		lv=(ListView) findViewById(R.id.lv_selfview);
		lv.setAdapter(new myadapter());
		//listView=(ListView) findViewById(R.id.lv_selfview);
	}
	
	private class myadapter extends BaseAdapter
	{
		private static final String tag = "myadapter";

		//控制listview中的显示条目
		@Override
		public int getCount() {
			
			return books.size();
		}

		@Override
		public Object getItem(int position) {
		
			return null;
		}

		@Override
		public long getItemId(int position) {
		
			return 0;
		}

		@Override
		public View getView(int position, View convertView, ViewGroup parent) {
			Log.i(tag, "返回位置對象"+position);
			TextView tView=new TextView(getApplicationContext());
			tView.setTextSize(15);
			tView.setTextColor(Color.BLACK);
			//得到某个位置对应的book对象
			Book book=books.get(position);
			tView.setText(book.toString());		
			return tView;
		}
	}

}

[wei220000]

tView.setText(book.toString()); book.toString();得到的是book这个类的类名和地址等信息，你要想显示book的名称，isn码等，要一条一条的加载到textview里面啊。比如 tView.setText(book.getB_num（））；

[qq_19817377]

通过您的方法，将数据找到了。但是ListView中却显示不全。

下面是需要显示的内容。

public View getView(int position, View convertView, ViewGroup parent) {
			Log.i(tag, "返回位置對象"+position);
			TextView tv1=new TextView(getApplicationContext());
			tv1.setTextSize(15);
			tv1.setTextColor(Color.BLACK);
			
			//得到某个位置对应的book对象
			Book book=books.get(position);
			tv1.setText(book.getB_num().toString());
			tv1.setText(book.getISBN().toString());
			tv1.setText(book.getBorrowed().toString());
			tv1.setText(book.getOrdered().toString());
			tv1.setText(book.getIntroduction().toString());
			System.out.println("图书编号："+book.getB_num()+"图书是否外借："+book.getBorrowed()+"图书介绍："+book.getIntroduction()+"ISBN："+book.getISBN()+"图书是否已借出："+book.getOrdered());
			return tv1;			
		}

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
  xmlns:android="http://schemas.android.com/apk/res/android"
  android:id="@+id/LinearLayout03"
  android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:background="#ffffcc"
   >
    <FrameLayout
    android:layout_width="fill_parent"
    android:layout_height="40dip"
    android:background="@drawable/title"
   >
    <TextView
    	android:text="@string/app_name"
    	android:layout_width="fill_parent"
		android:layout_height="fill_parent"
		android:layout_marginTop="0dip"
		android:layout_marginBottom="0dip"
		android:layout_marginLeft="0dip"
		android:textSize="20sp"
		android:textColor="#FFFFFF"
		android:textStyle="bold"
		android:gravity="center"
    >
    </TextView> 

   </FrameLayout>
   <LinearLayout
      android:orientation="horizontal"
      android:layout_width="fill_parent"
      android:layout_height="wrap_content"
      android:gravity="center"
      android:layout_marginLeft="7dip"
      android:layout_marginRight="7dip"
      android:layout_marginTop="4dip"
      android:layout_marginBottom="4dip"
      android:background="@drawable/navigator"
    >      
      <TextView
         android:text="@string/query_result"
         android:layout_height="wrap_content"
         android:layout_width="100dip"          
         android:textSize="18sp"
		 android:layout_marginLeft="10dip"
		 android:textColor="#FFFFFF"
		 android:gravity="center"
		 android:background="@drawable/hilight"
		 
       />       
    </LinearLayout>
          <ListView 
              android:id="@+id/lv_selfview" 
              android:layout_width="fill_parent" 
              android:layout_height="wrap_content"              
          ></ListView> 
    
</LinearLayout>

[wei220000]

Book book=books.get(position); tv1.setText(book.getB_num().toString()); tv1.setText(book.getISBN().toString()); tv1.setText(book.getBorrowed().toString()); tv1.setText(book.getOrdered().toString()); tv1.setText(book.getIntroduction().toString()); 你这相当于是一直在更新tv1中的数据，最后只会显示 tv1.setText(book.getIntroduction().toString());这一条中的数据。你可以设置做个textview，每一个单独显示一条数据。也可以创建一个String,包含book所有的内容，再tv1.settext(String).

[水的川]

book是一个对象，对象怎么能直接tostring，你要想显示book中所有属性的话，在book类中添加toString方法，将book中所有属性都返回。如public String toString(){ return "b_num="+b_num+"ordered"+ordered};

[qq_19817377]

使用了一个inflater，新建了一个item.xml文件，问题解决了，谢谢大家。