ListView行不顯示

我正在使用ListView來顯示聊天消息。消息不會出現在列表視圖中。我正在使用'setListAdapter（new ArrayAdapter（this，android.R.layout.simple_list_item_1，messageList））;`ListView行不顯示

請幫助我，我無法識別問題。

在此先感謝。

import java.util.ArrayList; 

import android.app.ListActivity; 
import android.content.Context; 
import android.database.Cursor; 
import android.database.sqlite.SQLiteDatabase; 
import android.os.Bundle; 
import android.util.Log; 
import android.view.Window; 
import android.widget.ArrayAdapter; 
import android.widget.TextView; 

public class ChatActivity extends ListActivity { 

    private String userId; 
    private String roomName = "Stackoverflow"; 
    private Context context; 
    private ArrayList<String> messageList = new ArrayList<String>(); 

    @Override 
    public void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     requestWindowFeature(Window.FEATURE_CUSTOM_TITLE); 
     setContentView(R.layout.chat_layout); 

     // Setting Custom Title of Activity 
     getWindow().setFeatureInt(Window.FEATURE_CUSTOM_TITLE, R.layout.window_title_login); 

     TextView textView = (TextView) findViewById(R.id.loginText); 
     textView.setText(roomName); 

     context = this; 

     //Get the User Credentials 
     String userCredentials[] = new Util().getUserCredentials(context); 
     userId = userCredentials[0]; 

     //Fetch the messages 
     fetchMessages(); 

     //Display the messages 
     displayResultList(); 
    } 

    /** 
    * It fetch the chat messages. 
    */ 
    public void fetchMessages() { 
     SQLiteDatabase database = null; 
     try { 
      SQLLiteHelper sqlLiteHelper = new SQLLiteHelper(context); 
      database = sqlLiteHelper.getWritableDatabase(); 
      Cursor cursor = database.rawQuery("select from_id, message from groups where roomname = " + roomName, null); 
      if(cursor != null) { 
       if(cursor.moveToFirst()) { 
        String chatMessage = null; 
        String from = null; 
        do { 
         chatMessage = cursor.getString(cursor.getColumnIndex("message")); 
         from = cursor.getString(cursor.getColumnIndex("from_id")); 
         messageList.add(from + ":" + chatMessage); 
        } while(cursor.moveToNext()); 
       } 
      } 
     } catch(Exception e) { 
      Log.v("HB", "Exceptino at::" + e.getMessage()); 
     } finally { 
      if(database != null) { 
       database.close(); 
      } 
     } 
    } 

    /** 
    * It display the chat messages. 
    */ 
    private void displayResultList() { 
     for(int index = 0; index < 10; index++) { 
      messageList.add("SO" + ":" + "hello"); 
     } 
     if(messageList != null && messageList.size() > 0) { 
      setListAdapter(new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, messageList)); 
      getListView().setTextFilterEnabled(true); 
     } 
    } 
} 

<ListView 
     android:id="@android:id/list" 
     android:layout_width="fill_parent" 
     android:layout_height="wrap_content" 
     android:layout_below="@+id/bottomLinearLayout" />

來源

2013-07-01 N Sharma

是否chat_layout包含ID @android一個ListView：ID /列表？ – Blackbelt

@blackbelt我已經更新了這個問題。 –

@blackbelt文字不可見，要麼是白色的。如何設置黑色 –

這是yon ca如何覆蓋的示例ArrayAdater.getView。

ArrayAdapter<String> arrayAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, messageList) { 
     public View getView(int position, View convertView, ViewGroup parent) { 
      if (convertView == null) { 
       convertView = LayoutInflater.from(YoutActivity.this).inflate(android.R.layout.simple_list_item_1, null); 
      } 

      ((TextView)convertView).setText(getItem(position)) 
      ((TextView)convertView).setTextColor(colors) 

      return convertView; 

     }; 
    }; 

setListAdapter(arrayAdapter);

檢查錯字

來源

2013-07-01 08:17:32 Blackbelt

其工作正常,,, –

ListView行不顯示

回答

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