отображения содержимого базы данных SQLite в ListView в андроида

Question

Здесь я хочу, чтобы отобразить содержимое

package com.example.datewithme; 
import java.util.ArrayList; 
import android.app.Activity; 
import android.content.Intent; 
import android.database.Cursor; 
import android.database.sqlite.SQLiteDatabase; 
import android.os.Bundle; 
import android.view.Menu; 
import android.view.MenuItem; 
import android.view.View; 
import android.widget.AdapterView; 
import android.widget.ArrayAdapter; 
import android.widget.ListView; 
import android.widget.TextView; 
import android.widget.Toast; 
import android.widget.AdapterView.OnItemClickListener; 

public class Welcome extends Activity{ 
Intent i=getIntent(); 
TextView tv; 
ListView lv; 
SQLiteDatabase db=null; 
int k=0; 
private ArrayList<String> Questions = new ArrayList<String>(); 
private DBHelper mHelper; 
private SQLiteDatabase dataBase; 
    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_main1); 
     lv = (ListView) findViewById(R.id.listView1); 

     /*String[] values = new String[100] ; 
     DBHelper db = new DBHelper(getApplicationContext()); 
     Cursor cs= db.getQuestions(); 
     k=0; 

     while(cs.moveToNext()) 
     { 
      String q = cs.getString(0); 
      values[k++]=q; 

     } 
     try{ 
     ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, 
        android.R.layout.simple_list_item_1, android.R.id.text1, values); 


       // Assign adapter to ListView 
       lv.setAdapter(adapter); 

       lv.setOnItemClickListener(new OnItemClickListener() { 
         @Override 
         public void onItemClick(AdapterView<?> parent, View view, 
         int position, long id) { 

         // ListView Clicked item index 
         int itemPosition  = position; 

         // ListView Clicked item value 
         String itemValue = (String) lv.getItemAtPosition(position); 

         // Show Alert 
         Toast.makeText(getApplicationContext(), 
          "Position :"+itemPosition+" ListItem : " +itemValue , Toast.LENGTH_LONG) 
          .show(); 

         } 


        }); 
     } 
     catch(Exception ex) 
     { 
      ex.printStackTrace(); 
     }*/ 

     tv=(TextView)findViewById(R.id.user); 
     //db=openOrCreateDatabase("mydb", MODE_PRIVATE, null); 
     String newString; 
     if (savedInstanceState == null) { 
      Bundle extras = getIntent().getExtras(); 
      if(extras == null) { 
       newString= null; 
      } else { 
       newString= extras.getString("name"); 
      } 
     } else { 
      newString= (String) savedInstanceState.getSerializable("name"); 
     } 
     tv.setText("Hello"+newString); 

    } 
     @Override 
      public boolean onCreateOptionsMenu(Menu menu) { 
       getMenuInflater().inflate(R.menu.activity_main, menu); 
       return true; 
      } 
      public boolean onOptionsItemSelected(MenuItem item) { 
       switch (item.getItemId()) { 
       case R.id.item1: 
        startActivity(new Intent(Welcome.this, TimeLine.class)); 
        return true; 
       case R.id.item2: 
        startActivity(new Intent(Welcome.this, About.class)); 
        return true; 
       case R.id.item3: 
        Toast.makeText(this, "Option3", Toast.LENGTH_SHORT).show(); 
        return true;    
       case R.id.item4: 
        this.finish(); 
        Intent intent = new Intent(Intent.ACTION_MAIN); 
        intent.addCategory(Intent.CATEGORY_HOME); 
        intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK); 
        startActivity(intent); 
        return true; 

       default: 
        return super.onOptionsItemSelected(item); 
       } 

      } 
      private void displayData() { 
        dataBase = mHelper.getWritableDatabase(); 
        Cursor mCursor = dataBase.rawQuery("SELECT * FROM " 
          + DBHelper.TABLE_NAME, null); 

        Questions.clear(); 
        if (mCursor.moveToFirst()) { 
         do { 
          Questions.add(mCursor.getString(mCursor.getColumnIndex(DBHelper.KEY_NAME))); 


         } while (mCursor.moveToNext()); 
        } 
        DisplayAdapter disadpt = new DisplayAdapter(Welcome.this,Questions); 
        lv.setAdapter(disadpt); 
        mCursor.close(); 
       } 
     } 

Вот мой видеоадаптер

package com.example.datewithme; 

import java.util.ArrayList; 

import android.content.Context; 
import android.view.LayoutInflater; 
import android.view.View; 
import android.view.ViewGroup; 
import android.widget.BaseAdapter; 
import android.widget.TextView; 
/** 
* adapter to populate listview with data 
* @author ketan(Visit my <a 
*   href="http://androidsolution4u.blogspot.in/">blog</a>) 
*/ 
public class DisplayAdapter extends BaseAdapter { 
    private Context mContext; 
    private ArrayList<String> questions; 


    public DisplayAdapter(Context c, ArrayList<String> questions) { 
     this.mContext = c; 

     this.questions = questions; 
    } 

    public int getCount() { 
     // TODO Auto-generated method stub 
     return questions.size(); 
    } 

    public Object getItem(int position) { 
     // TODO Auto-generated method stub 
     return null; 
    } 

    public long getItemId(int position) { 
     // TODO Auto-generated method stub 
     return 0; 
    } 

    public View getView(int pos, View child, ViewGroup parent) { 
     Holder mHolder; 
     LayoutInflater layoutInflater; 
     if (child == null) { 
      layoutInflater = (LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE); 
      child = layoutInflater.inflate(R.layout.list, null); 
      mHolder = new Holder(); 
      mHolder.txt_id = (TextView) child.findViewById(R.id.tv_que); 
      child.setTag(mHolder); 
     } else { 
      mHolder = (Holder) child.getTag(); 
     } 
     mHolder.txt_id.setText(questions.get(pos)); 

     return child; 
    } 

    public class Holder { 
     TextView txt_id; 
    } 

} 

Answer 1

попробовать это изменить ваш GetItem Метод адаптера.

public Object getItem(int position) { 
    // TODO Auto-generated method stub 
    return questions.get(poition); 
} 

Надеюсь, это поможет. См. Здесь: - http://coderzpassion.com/android-listview-with-image-and-text/