使用从游标获取的数据使用arrayList 填充ListView
Helo我试图使用sqLite中存储的数据填充listView。 在我选择了一个产品后，我希望该产品的所有参考文献都与我在图片中绘制的相同。 
我可以让ArrayAdapter将所有记录放在同一个xml中吗？
我的代码如下所示：返回所有记录的游标：
public Cursor getAllRows() { String where = null; // query the DBAdapter Cursor cursor = db.query(true, TABLE_NAME, ALL_KEYS, where, null, null, null, null, null); if (cursor != null) { cursor.moveToFirst(); } return cursor; } 将数据添加到arrayList：
public ArrayList fromCursorToArrayListString(Cursor c){ ArrayList result = new ArrayList(); c.moveToFirst(); for(int i = 0; i < c.getCount(); i++){ String row_PRODUCT = c.getString(c.getColumnIndex(KEY_PRODUCT)); String row_PRICE = c.getString(c.getColumnIndex(KEY_PRICE)); String row_TYPE = c.getString(c.getColumnIndex(KEY_TYPE)); result.add(row_PRODUCT); result.add(row_PRICE); result.add(row_TYPE); c.moveToNext(); } return result; }
在mainActivity我写了这个：
ListView listView = (ListView) findViewById(R.id.new_list_listView); Cursor cursor = newListDBAdapter.getAllRows(); ArrayAdapter arrayAdapter = new ArrayAdapter(this,R.layout.custom_product_layout_new_list,R.id.custom_product_layout_new_list_productName,newListDBAdapter.fromCursorToArrayListString(cursor)); listView.setAdapter(arrayAdapter);
CursorAdapter适配器对此更加可靠。 你只需将光标传递给适配器，这样就不需要维护任何集合。 你必须遵循一些事情
适配器
public class YourCursorAdapter extends CursorAdapter { public YourCursorAdapter(Context context, Cursor cursor, int flags) { super(context, cursor, 0); } // The newView method is used to inflate a new view and return it, // you don't bind any data to the view at this point. @Override public View newView(Context context, Cursor cursor, ViewGroup parent) { return LayoutInflater.from(context).inflate(R.layout.your_item_view, parent, false); } // The bindView method is used to bind all data to a given view // such as setting the text on a TextView. @Override public void bindView(View view, Context context, Cursor c) { // Find fields to populate in inflated template TextView tvproduct = (TextView) view.findViewById(R.id.tcproduct); TextView tvPrice = (TextView) view.findViewById(R.id.tvPrice); TextView tvType = (TextView) view.findViewById(R.id.tvType); // Extract properties from cursor String row_PRODUCT = c.getString(c.getColumnIndex(KEY_PRODUCT)); String row_PRICE = c.getString(c.getColumnIndex(KEY_PRICE)); String row_TYPE = c.getString(c.getColumnIndex(KEY_TYPE)); // Populate fields with extracted properties tvproduct.setText(row_PRODUCT); tvPrice.setText(row_PRICE); tvType.setText(row_TYPE); } }
从DB检索记录
public Cursor getAllRows（）{String where = null;
// query the DBAdapter Cursor cursor = db.query(true, TABLE_NAME, ALL_KEYS, where, null, null, null, null, null); if (cursor != null) { cursor.moveToFirst(); } return cursor;
}
现在将光标设置为适配器，将适配器设置为listview
ListView listView = (ListView) findViewById(R.id.new_list_listView); Cursor cursor = newListDBAdapter.getAllRows(); YourCursorAdapter arrayAdapter = new YourCursorAdapter(this, cursor); listView.setAdapter(arrayAdapter );
您可以使用SimpleAdapter：
ListView list = (ListView) findViewById(R.id.mylist); ArrayList> mylistData = new ArrayList>(); String[] columnTags = new String[] {"col1", "col2", "col3"}; int[] columnIds = new int[] {R.id.column1, R.id.column2, R.id.column3}; for(int i=0; i<3; i++) { HashMap map = new HashMap(); //initialize row data for(int j=0; j<3; j++) { map.put(columnTags[j], "row”+i+”col"+j); } mylistData.add(map); } SimpleAdapter arrayAdapter = new SimpleAdapter(this, mylistData, R.layout.mylistrow, columnTags , columnIds); list.setAdapter(arrayAdapter);
或者使用CustomAdapter
import android.app.Activity; import android.os.Bundle; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.BaseAdapter; import android.widget.ImageView; import android.widget.ListView; import android.widget.TextView; public class MainActivity extends Activity { ListView l1; String[] t1={"video1","video2"}; String[] d1={"lesson1","lesson2"}; int[] i1 ={R.drawable.ic_launcher,R.drawable.ic_launcher}; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); l1=(ListView)findViewById(R.id.list); l1.setAdapter(new dataListAdapter(t1,d1,i1)); } class dataListAdapter extends BaseAdapter { String[] Title, Detail; int[] imge; dataListAdapter() { Title = null; Detail = null; imge=null; } public dataListAdapter(String[] text, String[] text1,int[] text3) { Title = text; Detail = text1; imge = text3; } public int getCount() { // TODO Auto-generated method stub return Title.length; } public Object getItem(int arg0) { // TODO Auto-generated method stub return null; } public long getItemId(int position) { // TODO Auto-generated method stub return position; } public View getView(int position, View convertView, ViewGroup parent) { LayoutInflater inflater = getLayoutInflater(); View row; row = inflater.inflate(R.layout.custom, parent, false); TextView title, detail; ImageView i1; title = (TextView) row.findViewById(R.id.title); detail = (TextView) row.findViewById(R.id.detail); i1=(ImageView)row.findViewById(R.id.img); title.setText(Title[position]); detail.setText(Detail[position]); i1.setImageResource(imge[position]); return (row); } } }
您可以使用SimpleCursorAdapter。
以下是一些示例（ 请参阅完整示例 ）：
public static final String KEY_APPLES = "apples"; public static final String KEY_PRICE = "Price"; public static final String KEY_TYPE = "Type"; private void displayListView() { Cursor cursor; SimpleCursorAdapter dataAdapter; //android.support.v4.widget.SimpleCursorAdapter; //Put your code to get cursor // The desired columns to be bound String[] columns = new String[]{ KEY_APPLES, KEY_PRICE, KEY_TYPE }; // the XML defined views which the data will be bound to int[] to = new int[]{ R.id.apples, R.id.price, R.id.type }; // create the adapter using the cursor pointing to the desired data //as well as the layout information dataAdapter = new SimpleCursorAdapter( this, R.layout.country_info, cursor, columns, to, 0); ListView listView = (ListView) findViewById(R.id.listView); // Assign adapter to ListView listView.setAdapter(dataAdapter); }