Question

我正在尝试从数据库中获取值并显示listview中的所有值。我的代码是：

try
    {           
        HttpClient httpclient = new DefaultHttpClient();
        HttpPost httppost = new HttpPost("http://10.0.2.2/meetingschedular/viewdetail.php?mdate="+viewdate.getText().toString());
        httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
        HttpResponse response = httpclient.execute(httppost);
        HttpEntity entity = response.getEntity();
        is = entity.getContent();
        }
        catch(Exception e)
        {
            Toast.makeText(getBaseContext(),e.toString() ,Toast.LENGTH_LONG).show();
        }

        //Convert response to string
        try
        {
            BufferedReader reader = new BufferedReader(new InputStreamReader(is,"UTF-8"));
            sb = new StringBuilder();
            String line = null;
            while ((line = reader.readLine()) != null)
                {
                    sb.append(line + "\n");
                }
                is.close();
                result = sb.toString();                 
        }
        catch(Exception e)
        {
            Toast.makeText(getBaseContext(),e.toString() ,Toast.LENGTH_LONG).show();
        }
        //END Convert response to string

            try
            {               
                JSONArray jArray =  new JSONArray(result);

                for(int i=0;i<jArray.length();i++)
                {   
                    JSONArray innerJsonArray = jArray.getJSONArray(i);
                    JSONObject json_data = innerJsonArray.getJSONObject(0);                     
                    String at= json_data.getString("attendees"); 
                    String at1=json_data.getString("title");                    
                    String at2=json_data.getString("mtime");
                    String at3=json_data.getString("venue");
                    s.append(j+"Attendees:"+at);
                    s.append("\nTitle:"+at1);
                    s.append("\nTime:"+at2);
                    s1.append("\nVenue:"+at3);

                    r.add(s.toString());
                    //r.add(s1.toString());
                    j++;
                }

                l.setAdapter(new ArrayAdapter<String>(this, android.R.layout.simple_expandable_list_item_1, r));

            }

            catch(Exception e1)
            {
                e1.printStackTrace();
                Toast.makeText(getBaseContext(),"Sorry No Meeting Details",Toast.LENGTH_LONG).show();
            }

但是当我显示List视图时，我只从Database获取一行，并且在第二行数据库未显示时显示两行。

like this

PLs hlp me .. :(

这是我的Xml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="wrap_content"
android:background="@drawable/prle"
android:orientation="vertical"
tools:context=".Meetdetail1Activity" >

<TextView
    android:id="@+id/textView1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignParentLeft="true"
    android:layout_alignParentTop="true"
    android:background="@color/Grey"
    android:text="@string/homelinkpropose"
    android:textColor="@color/blue" />

<TextView
    android:id="@+id/textView2"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignParentRight="true"
    android:layout_alignParentTop="true"
    android:background="@color/Grey"
    android:text="@string/logoutproposemeet"
    android:textColor="@color/blue" />

<TextView
    android:id="@+id/textView3"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_below="@+id/textView1"
    android:layout_centerHorizontal="true"
    android:layout_marginTop="15dp"
    android:text="@string/meetdetaill"
    android:textColor="@color/yellow"
    android:textSize="@dimen/meetdettextsize" />

<TextView
    android:id="@+id/textView4"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_below="@+id/textView3"
    android:layout_centerHorizontal="true"
    android:text="@string/viewdate" />

<ListView
    style="@style/dividedListStyle"
    android:id="@+id/listview"
    android:layout_width="wrap_content"
    android:layout_height="250dp"
    android:layout_below="@+id/textView4"
    android:dividerHeight="20dp">

 </ListView>

<TextView
    android:id="@+id/textView5"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignParentTop="true"
    android:layout_marginRight="18dp"
    android:layout_toLeftOf="@+id/textView2"
    android:text="@string/viewname"
    android:textColor="@color/yellow"
    android:textSize="@dimen/sixtn" />

Answer 1

你声明s和r变量吗？

你必须在for for循环

之前声明ArrayList变量

检查您的xml列表视图，您可以为此提供固定大小。更改以换行或填充父级

Answer 2

我认为您的JSON-String处理存在一些问题，请尝试：

JSONObject object = new JSONObject(result);
JSONArray Jarray = object.getJSONArray("atendees");

for (int i = 0; i < Jarray.length(); i++) {
    JSONObject Jasonobject = Jarray.getJSONObject(i);
}

ofc你必须为其他json-table处理这个问题！

不在Listview中显示值

2 个答案: