首先写个php脚本输出json，注意，还要输出回车，方便android的bufferreader读取一行 

      bookid = $id;            $this->bookname = $name;            $this->bookinfo = $info;        }    }        $book1 = new Book("1","高等数学","一本好书");    $book2 = new Book("2","呵呵呵呵","一本好书");    $book3 = new Book("3","哈哈哈哈","一本好书");                //把对象转成json 输出    echo json_encode($book1);    echo "\r\n";    echo json_encode($book2);    echo "\r\n";    echo json_encode($book3);    echo "\r\n";    ?>

 

然后在android的客户端，用子线程发送http请求获取数据，然后发消息给主线程的handler更新listview

listview的一行的样式  one_item.xml  :

 

activity的java代码:

//搞了我半天，整个流程应该是这样的//因为http获取json的数据 写到一个新线程里  new thread ( runnableUi )//在新线程runnableUi里，有一个initDataAndAdapter() 用来获得网络数据 放进listbook，获取完后发消息给 主线程的handler//handler收到消息后， 把数据源listbook 传给  listview 的adapter (即更新主线程界面)public class MainActivity extends Activity {        List
      
        listBook;    ListView listView;            // 构建Runnable对象，在runnable中更新界面      Runnable runnableUi = new Runnable(){          @Override          public void run() {                          initDataAndAdapter();        }                };          //主线程的handler，  http请求获得数据后 会调用这个主线程的handler  来修改主线程界面(绑定listview的adapter)    Handler handler = new Handler(){                public void handleMessage(Message msg) {                        //在主线程的handler里    修改listview的适配器            listView.setAdapter(new MyListAdapter(getApplicationContext(), listBook ));                    };            };            @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);                listView = (ListView)findViewById(R.id.listView1);        listBook = new ArrayList
       
        ();                        new Thread( runnableUi ).start();                        }    @Override    public boolean onCreateOptionsMenu(Menu menu) {        // Inflate the menu; this adds items to the action bar if it is present.        getMenuInflater().inflate(R.menu.main, menu);        return true;    }                public void initDataAndAdapter() {                HttpClient httpClient = new DefaultHttpClient();        HttpGet httpGet = new HttpGet("http://taobibi.kuphp.net/");        Book book;                try {                        HttpResponse httpResponse = httpClient.execute(httpGet);            BufferedReader bufferReader = new BufferedReader( new InputStreamReader( httpResponse.getEntity().getContent() ) );                        for(String s = bufferReader.readLine(); s != null; s = bufferReader.readLine())            {                //每行为一个json对象                JSONObject jsonObject = new JSONObject( s );                Log.v("mytag", s);                                //然后放进book对象                book = new Book();                book.bookId = jsonObject.getString("bookid");                book.bookName = jsonObject.getString("bookname");                book.bookInfo = jsonObject.getString("bookinfo");                                //然后把book放进list                listBook.add(book);            }                                            } catch (ClientProtocolException e) {            // TODO Auto-generated catch block            e.printStackTrace();        } catch (IOException e) {            // TODO Auto-generated catch block            e.printStackTrace();        } catch (JSONException e) {            // TODO Auto-generated catch block            e.printStackTrace();        }                        //数据全都接收到listView以后，发消息给主线程里面的handler，让他去修改listview 的  setadapter        handler.sendEmptyMessage(0);            }                    class Book {        String bookId;        String bookName;        String bookInfo;    }            class MyListAdapter extends BaseAdapter {                Context context;        List
        
          listBook;        MyListAdapter(Context con , List
         
           list ) {            this.context = con;            listBook = (ArrayList
          
           )list;                    }                @Override        public int getCount() {            return listBook.size();        }        @Override        public Object getItem(int arg0) {            return arg0;        }        @Override        public long getItemId(int arg0) {            return arg0;        }        @Override        public View getView(int position, View convertView, ViewGroup parent) {                        LayoutInflater inflator = LayoutInflater.from(context);            View oneView = inflator.inflate(R.layout.one_item, null);            TextView textView = (TextView)oneView.findViewById(R.id.textview);                        String str = listBook.get(position).bookId  + " " + listBook.get(position).bookName + " " +  listBook.get(position).bookInfo;             textView.setText( str );                        return oneView;        }            }}
          
         
        
       
      

 

 

 

 

参考:

解决NetworkOnMainThreadException    

Android访问php取回json数据