將數據加載到listvcoiew時出錯

我嘗試從遠程服務器使用自定義BaseAdapter類將數據加載到列表視圖中。除了數據不會顯示在listview.No上以外，。下面是代碼：將數據加載到listvcoiew時出錯

活動類：

public class MyAccountActivity extends Activity{ 
public static final String URL="http://***.co.ke/ussd/get_shares.php"; 
private ProgressDialog progressDialog; 
private static final String TAG_NUMBER = "share_number"; 
    private static final String TAG_NAME = "share_name"; 

ArrayList shareList; 

public void onCreate(Bundle savedInstanceState){ 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_my_account); 

    ArrayList sharelist = update_shares(); 
    final ListView lv1 = (ListView) findViewById(R.id.mylist); 
    lv1.setAdapter(new CustomShareListAdapter(this, sharelist)); 
    //ListView listview = getListView(); 

} 

String data=""; 
public ArrayList update_shares(){ 
    InputStream is=null; 
    String result=""; 
    String key="admin"; 
    ArrayList results=new ArrayList(); 

    ArrayList<NameValuePair>user_details=new ArrayList<NameValuePair>(); 
    user_details.add(new BasicNameValuePair("user",key)); 

    try{ 
     HttpClient httpClient=new DefaultHttpClient(); 
     HttpPost httpPost=new HttpPost(URL); 
     httpPost.setEntity(new UrlEncodedFormEntity(user_details)); 
     HttpResponse response=httpClient.execute(httpPost); 
     HttpEntity entity=response.getEntity(); 
     is=entity.getContent(); 
    } 
    catch(Exception e){ 
     Log.e("log tag","Error in connection"+e.toString()); 
    } 

    try{ 
     BufferedReader reader=new BufferedReader(new InputStreamReader(is,"iso-8859-1"),8); 
     StringBuilder sb=new StringBuilder(); 
     String line=null; 

     while((line=reader.readLine()) != null){ 
      sb.append(line + "\n"); 
     } 
     is.close(); 
     result=sb.toString(); 
    } 
    catch(Exception e){ 
     Log.e("log_tag", "Error converting result "+e.toString()); 
    } 



    try{ 
     JSONArray jArray=new JSONArray(); 
     for(int i=0;i<jArray.length();i++){ 
      JSONObject json_data = jArray.getJSONObject(i); 
      String share=json_data.getString(TAG_NAME); 
      String number=json_data.getString(TAG_NUMBER); 

       ShareList myshares=new ShareList(); 
       myshares.set_share_name(share); 
       myshares.set_share_number(number); 
       results.add(myshares); 
     } 
     Toast.makeText(getApplicationContext(), "Parsed ok",Toast.LENGTH_SHORT).show(); 
    } 
    catch(Exception e){ 
     Log.e("log_tag", "Error parsing data "+e.toString()); 
    } 
    return results; 
} 
}

自定義適配器類：

public class CustomShareListAdapter extends BaseAdapter { 

private ArrayList listData; 

private LayoutInflater layoutInflater; 

public CustomShareListAdapter(Context context, ArrayList listData) { 
    this.listData = listData; 
    layoutInflater = LayoutInflater.from(context); 
} 

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

@Override 
public Object getItem(int position) { 
    return listData.get(position); 
} 

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

public View getView(int position, View convertView, ViewGroup parent) { 
    ViewHolder holder; 
    if (convertView == null) { 
     convertView = layoutInflater.inflate(R.layout.share_list, null); 
     holder = new ViewHolder(); 
     holder.nameView = (TextView) convertView.findViewById(R.id.company); 
     holder.numberView = (TextView) convertView.findViewById(R.id.share_number); 
     convertView.setTag(holder); 
    } else { 
     holder = (ViewHolder) convertView.getTag(); 
    } 

    ShareList shareList = (ShareList)listData.get(position); 
    holder.nameView.setText(shareList.get_share_name()); 
    holder.numberView.setText(shareList.get_share_number()); 
    return convertView; 
} 

static class ViewHolder { 
    TextView nameView; 
    TextView numberView; 
} 
}

這是shareList類;

public class ShareList { 
private String share_name; 
private String share_number; 

public String get_share_name(){ 
    return share_name; 
} 
public void set_share_name(String share_name){ 
    this.share_name=share_name; 
} 

public String get_share_number(){ 
    return share_number; 
} 
public void set_share_number(String share_number){ 
    this.share_number=share_number; 
} 



public String to_string(){ 
    return "[name="+share_name+",number="+share_number+"]"; 
} 

}

幫助將不勝感激。謝謝。

來源

2013-07-01 mungaih pk

把你的共享列表類交易的 –

方式錯了人\ –

心靈給我方向，請 –

import java.io.BufferedReader; 
import java.io.InputStream; 
import java.io.InputStreamReader; 
import java.util.ArrayList; 

import org.apache.http.HttpEntity; 
import org.apache.http.HttpResponse; 
import org.apache.http.NameValuePair; 
import org.apache.http.client.HttpClient; 
import org.apache.http.client.entity.UrlEncodedFormEntity; 
import org.apache.http.client.methods.HttpPost; 
import org.apache.http.impl.client.DefaultHttpClient; 
import org.apache.http.message.BasicNameValuePair; 
import org.json.JSONArray; 
import org.json.JSONObject; 


import android.app.Activity; 
import android.app.ProgressDialog; 
import android.os.Bundle; 
import android.util.Log; 
import android.widget.ListView; 
import android.widget.Toast; 

public class MyAccountActivity extends Activity{ 
public static final String URL="http://***.co.ke/ussd/get_shares.php"; 
private ProgressDialog progressDialog; 
private static final String TAG_NUMBER = "share_number"; 
    private static final String TAG_NAME = "share_name"; 
ArrayList<ShareList> shareList=new ArrayList<ShareList>(); 

public void onCreate(Bundle savedInstanceState){ 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_my_account); 

    shareList = update_shares(); 
    final ListView lv1 = (ListView) findViewById(R.id.mylist); 
    lv1.setAdapter(new CustomShareListAdapter(this, sharelist)); 
    //ListView listview = getListView(); 

} 

String data=""; 
public ArrayList<ShareList> update_shares(){ 
    InputStream is=null; 
    String result=""; 
    String key="admin"; 

    ArrayList<NameValuePair>user_details=new ArrayList<NameValuePair>(); 
    user_details.add(new BasicNameValuePair("user",key)); 

    try{ 
     HttpClient httpClient=new DefaultHttpClient(); 
     HttpPost httpPost=new HttpPost(URL); 
     httpPost.setEntity(new UrlEncodedFormEntity(user_details)); 
     HttpResponse response=httpClient.execute(httpPost); 
     HttpEntity entity=response.getEntity(); 
     is=entity.getContent(); 
    } 
    catch(Exception e){ 
     Log.e("log tag","Error in connection"+e.toString()); 
    } 

    try{ 
     BufferedReader reader=new BufferedReader(new InputStreamReader(is,"iso-8859-1"),8); 
     StringBuilder sb=new StringBuilder(); 
     String line=null; 

     while((line=reader.readLine()) != null){ 
      sb.append(line + "\n"); 
     } 
     is.close(); 
     result=sb.toString(); 
    } 
    catch(Exception e){ 
     Log.e("log_tag", "Error converting result "+e.toString()); 
    } 



    try{ 
     JSONArray jArray=new JSONArray(); 
     for(int i=0;i<jArray.length();i++){ 
      JSONObject json_data = jArray.getJSONObject(i); 
      String share=json_data.getString(TAG_NAME); 
      String number=json_data.getString(TAG_NUMBER); 
      shareList.add(new ShareList(share, number)); 
     } 
     Toast.makeText(getApplicationContext(), "Parsed ok",Toast.LENGTH_SHORT).show(); 
    } 
    catch(Exception e){ 
     Log.e("log_tag", "Error parsing data "+e.toString()); 
    } 
    return shareList; 
} 

}

更改您的活動像上面

public class ShareList { 
     private String share_name; 
     private String share_number; 
     public String getShare_name() { 
      return share_name; 
     } 
     public void setShare_name(String share_name) { 
      this.share_name = share_name; 
     } 
     public String getShare_number() { 
      return share_number; 
     } 
     public void setShare_number(String share_number) { 
      this.share_number = share_number; 
     } 
     public ShareList(String share_name, String share_number) { 
      super(); 
      this.share_name = share_name; 
      this.share_number = share_number; 
     } 
     @Override 
     public String toString() { 
      return "ShareList [share_name=" + share_name + ", share_number=" 
        + share_number + "]"; 
     } 


}

更改sharelist像上面它的工作原理

來源

2013-07-01 11:06:59

仍然不起作用 –

打印收到的字符串並檢查是否有任何東西到達r不是 –

我忘了解析在MyAccountActivity活動嘗試部分結果。

JSONArray jArray=new JSONArray();

應

JSONArray jarray=new JSONArray(result);

來源

2013-07-01 12:13:29

將數據加載到listvcoiew時出錯

回答

相關問題