我有来自数据库的查询标题列，并希望在GridView的TextView中设置它。
如何？
CafeDatasource
public List<Model_Insert> findTblCafe(){
List<Model_Insert> model_Inserts = new ArrayList<Model_Insert>();
Cursor cursor = database.query(CafeDbOpenHelper.TABLE_CAFE, rtv_tbl_Cafe,
null, null, null, null, null);
Log.i("number", "return" + cursor.getCount()+ " rows");
if(cursor.getCount() > 0){
while (cursor.moveToNext()) {
Model_Insert model_Insert = new Model_Insert();
model_Insert.setCafe_Id(cursor.getInt(cursor.getColumnIndex(CafeDbOpenHelper.CAFE_ID)));
model_Insert.setCafe_Title(cursor.getString(cursor.getColumnIndex(CafeDbOpenHelper.CAFE_TITLE)));
model_Insert.setCafe_Been(cursor.getInt(cursor.getColumnIndex(CafeDbOpenHelper.CAFE_BEEN)));
model_Insert.setCafe_Want(cursor.getInt(cursor.getColumnIndex(CafeDbOpenHelper.CAFE_WANT)));
model_Insert.setCafe_Address(cursor.getString(cursor.getColumnIndex(CafeDbOpenHelper.CAFE_ADDRESS)));
model_Insert.setCafe_Thumb(cursor.getString(cursor.getColumnIndex(CafeDbOpenHelper.CAFE_THUMB)));
model_Insert.setCafe_Description(cursor.getString(cursor.getColumnIndex(CafeDbOpenHelper.CAFE_DESCRIPTION)));
model_Insert.setCafe_WifiRate(cursor.getInt(cursor.getColumnIndex(CafeDbOpenHelper.CAFE_WIFI_RATE)));
model_Insert.setCafe_CoffeeRate(cursor.getInt(cursor.getColumnIndex(CafeDbOpenHelper.CAFE_COFFEE_RATE)));
model_Insert.setCafe_Latitude(cursor.getDouble(cursor.getColumnIndex(CafeDbOpenHelper.CAFE_LATITUDE)));
model_Insert.setCafe_Longitude(cursor.getDouble(cursor.getColumnIndex(CafeDbOpenHelper.CAFE_LONGITUDE)));
model_Inserts.add(model_Insert);
}
}
return model_Inserts;
}
MainActivity
public ArrayList<HashMap<String, String>> placeList;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_card);
===============================================================
dataSource = new CafeDataSource(this);
dataSource.open();
List<Model_Insert> model_Inserts = dataSource.findTblCafe();// query database (findTblCafe)
if(model_Inserts.size() == 0){
new DownloadImageTask().execute();
model_Inserts = dataSource.findTblCafe();
}
===============================================================
} // End onCreate
public void ShowAllContent() {
GridView gridView1 = (GridView) findViewById(R.id.grid_all);
gridView1.setAdapter(new ImageAdapter(TopActivity.this, placeList));
}
public class DownloadImageTask extends AsyncTask<String, Void, Void>{
@Override
protected Void doInBackground(String... params) {
placeList = new ArrayList<HashMap<String,String>>();
JSONParser jParser = new JSONParser();
JSONObject jsonO = jParser.getJSONUrl(url);
try {
places = jsonO.getJSONArray("place");
for (int i = 0; i < places.length(); i++) {
JSONObject jobj = places.getJSONObject(i);
int cafe_id = jobj.getInt(TAG_CAFE_ID);
String cafe_title = jobj.getString(TAG_CAFE_TITLE);
int cafe_been = jobj.getInt(TAG_CAFE_BEEN);
int cafe_want = jobj.getInt(TAG_CAFE_WANT);
String cafe_address = jobj.getString(TAG_CAFE_ADDRESS);
String cafe_thumb = jobj.getString(TAG_CAFE_THUMB);
String cafe_description = jobj.getString(TAG_CAFE_DESCRIPTION);
int cafe_wifi_rate = jobj.getInt(TAG_CAFE_WIFI_RATE);
int cafe_coffee_rate = jobj.getInt(TAG_CAFE_COFFEE_RATE);
double cafe_latitude = jobj.getDouble(TAG_CAFE_LATITUDE);
double cafe_longitude = jobj.getDouble(TAG_CAFE_LONGITUDE);
// Table Save
Model_Insert model_Insert = new Model_Insert();
model_Insert.setCafe_Id(cafe_id);
model_Insert.setCafe_Been(cafe_been);
model_Insert.setCafe_Want(cafe_want);
model_Insert = dataSource.createTableCafeSave(model_Insert);
Log.i("data", " ID " + model_Insert.getCafe_Id());
// Table Cafe
model_Insert = new Model_Insert();
model_Insert.setCafe_Id(cafe_id);
model_Insert.setCafe_Title(cafe_title);
model_Insert.setCafe_Been(cafe_been);
model_Insert.setCafe_Want(cafe_want);
model_Insert.setCafe_Address(cafe_address);
model_Insert.setCafe_Thumb(cafe_thumb);
model_Insert.setCafe_Description(cafe_description);
model_Insert.setCafe_WifiRate(cafe_wifi_rate);
model_Insert.setCafe_CoffeeRate(cafe_coffee_rate);
model_Insert.setCafe_Latitude(cafe_latitude);
model_Insert.setCafe_Longitude(cafe_longitude);
model_Insert = dataSource.createTableCafe(model_Insert);
Log.i("data", " Picture " + model_Insert.getCafe_Id());
HashMap<String, String> map = new HashMap<String, String>();
map.put(TAG_CAFE_TITLE, cafe_title);
placeList.add(map);
}
// for " piture " Object in json
pictures = jsonO.getJSONArray("pictures");
for (int i = 0; i < pictures.length(); i++) {
JSONObject jObj = pictures.getJSONObject(i);
int cafe_id = jObj.getInt(TAG_CAFE_ID);
String picture_url = jObj.getString(TAG_PICTURE_URL);
// Table Picture
Model_Insert model_Insert = new Model_Insert();
model_Insert.setCafe_Id(cafe_id);
model_Insert.setPitureUrl(picture_url);
model_Insert = dataSource.createTablePicture(model_Insert);
Log.i("pic", " Picture " + model_Insert.getPitureurl());
HashMap<String, String> map = new HashMap<String, String>();
placeList.add(map);
}
} catch (JSONException e) {
// TODO: handle exception
}
return null;
}
protected void onPostExecute(Void unused) {
ShowAllContent(); // When Finish Show Content
}
}
private static class ViewHolder {
public ImageView imageview;
public TextView txtTitle;
}
public class ImageAdapter extends BaseAdapter {
private ArrayList<HashMap<String, String>> MyArr = new ArrayList<HashMap<String,String>>();
public ImageAdapter(Context c, ArrayList<HashMap<String, String>> myArrayList){
context = c;
MyArr = myArrayList;
}
@Override
public int getCount() {
return MyArr.size();
}
@Override
public Object getItem(int position) {
// TODO Auto-generated method stub
return position;
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView(int position, View converView, ViewGroup parent) {
ViewHolder viewHolder = new ViewHolder();
LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
if(converView == null){
converView = inflater.inflate(R.layout.grid_item, null);
}
viewHolder.imageview = (ImageView) converView.findViewById(R.id.imv_card_cafe);
viewHolder.txtTitle = (TextView) converView.findViewById(R.id.txt_title);
/* String str = "frute : juse text";
Integer len;
len = str.length();
if(len > 20){
String result = str.substring(0, 15);
viewHolder.txtTitle.setText(result);
}
else {
viewHolder.txtTitle.setText(str);
} */
=============================================================================
viewHolder.txtTitle.setText(...............................?);
=============================================================================
viewHolder.imageview.setImageResource(mThumb[position]);
return converView;
}
}
答案 0 :(得分：1)
因为您要获取model_Inserts列表中的所有标题，您需要将此列表传递给自定义BaseAdapter，以便在TextView中显示为：
将ShowAllContent()方法更改为：
public void ShowAllContent() {
GridView gridView1 = (GridView) findViewById(R.id.grid_all);
gridView1.setAdapter(new ImageAdapter(TopActivity.this, placeList,model_Inserts));
}
和ImageAdapter构造函数为：
public class ImageAdapter extends BaseAdapter {
private ArrayList<HashMap<String, String>> MyArr =
new ArrayList<HashMap<String,String>>();
List<Model_Insert> model_Inserts=null;
public ImageAdapter(Context c,
ArrayList<HashMap<String, String>> myArrayList,
List<Model_Insert> model_Inserts){
context = c;
MyArr = myArrayList;
this.model_Inserts=model_Inserts;
}
///your code here...
现在使用model_Inserts获取要在getView中显示的标题