[英]Using simpleAdapter with image for listview
我在使用簡單的適配器將圖像放入列表視圖時遇到了一些問題。 我從我的在線服務器(亞馬遜)獲取圖像。 根據用戶 ID 下載圖像后,我嘗試在我的列表視圖中設置它們,但沒有顯示任何內容,也沒有發生錯誤。
下面是我的代碼:
// looping through All applicants
for (int i = 0; i < applicant.length(); i++) {
JSONObject c = applicant.getJSONObject(i);
// Storing each JSON item in variable
String uid = c.getString(TAG_UID);
String name = c.getString(TAG_NAME);
String overall = c.getString(TAG_OVERALL);
String apply_datetime = c.getString(TAG_APPLY_DATETIME);
String photo = c.getString(TAG_PHOTO);
// creating new HashMap
//HashMap<String, String> map = new HashMap<String, String>();
//IMAGE
HashMap<String, Object> map = new HashMap<String, Object>();
// adding each child node to HashMap key (value)
map.put(TAG_UID, uid);
map.put(TAG_NAME, name);
map.put(TAG_OVERALL, overall);
map.put(TAG_APPLY_DATETIME, apply_datetime);
// adding HashList to ArrayList
// applicantsList.add(map);
// LISTING IMAGE TO LISTVIEW
try {
imageURL = c.getString(TAG_PHOTO);
InputStream is = (InputStream) new URL(
"my url link/images/"
+ imageURL).getContent();
d = Drawable.createFromStream(is, "src name");
} catch (Exception e) {
e.printStackTrace();
}
map.put(TAG_PHOTO, d);
// adding HashList to ArrayList
applicantsList.add(map);
}
如您所見,在我下載圖像后。 我使用下面的 simpleAdapter 設置為列表視圖:
SimpleAdapter adapter = new SimpleAdapter(
SignUpApplicantActivity.this, applicantsList,
R.layout.list_applicant, new String[] {
TAG_UID, TAG_NAME, TAG_OVERALL,
TAG_APPLY_DATETIME, TAG_PHOTO }, new int[] {
R.id.applicantUid, R.id.applicantName,
R.id.applicantOverall,
R.id.apply_datetime, R.id.list_image });
// updating listView
setListAdapter(adapter);
您是否調用了 notifyDatasetChange() ? 如果您不調用它,您的適配器可能不會失效。
從SimpleAdapter 文檔中,圖像數據應為資源 ID 或字符串(圖像 URI) - 請參閱setViewImage(ImageView,String)
我看到 2 個解決方案:
實現您自己的視圖綁定器以將 drawable 綁定到 ImageView:
adapter.setViewBinder(new SimpleAdapter.ViewBinder() { @Override public boolean setViewValue(View view, Object data, String textRepresentation) { if(view.getId() == R.id.list_image) { ImageView imageView = (ImageView) view; Drawable drawable = (Drawable) data; imageView.setImageDrawable(drawable); return true; } return false; } });
嘗試
try{
for (int i = 0; i < applicant.length(); i++) {
JSONObject c = applicant.getJSONObject(i);
// Storing each JSON item in variable
String uid = c.getString(TAG_UID);
String name = c.getString(TAG_NAME);
String overall = c.getString(TAG_OVERALL);
String apply_datetime = c.getString(TAG_APPLY_DATETIME);
String photo = c.getString(TAG_PHOTO);
// creating new HashMap
HashMap<String, String> map = new HashMap<String, String>();
// adding each child node to HashMap key (value)
map.put(TAG_UID, uid);
map.put(TAG_NAME, name);
map.put(TAG_OVERALL, overall);
map.put(TAG_APPLY_DATETIME, apply_datetime);
map.put(TAG_PHOTO, photo);
// adding HashList to ArrayList
applicantsList.add(map);
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
SimpleAdapter adapter = new SimpleAdapter(
SignUpApplicantActivity.this, applicantsList,
R.layout.list_applicant, new String[] {
TAG_UID, TAG_NAME, TAG_OVERALL,
TAG_APPLY_DATETIME, TAG_PHOTO }, new int[] {
R.id.applicantUid, R.id.applicantName,
R.id.applicantOverall,
R.id.apply_datetime, R.id.list_image });
// updating listView
setListAdapter(adapter);
也許我的代碼可以幫助你!?! 我已經做了
convertDrawable(int 整數)
和 String.valueOf(convertDrawable(iconId))
HashF.put(TAG_ID, String.valueOf(convertDrawable(iconId)));
private void getList(JSONObject json) {
try {
details = json.getJSONArray(TAG_LIST);
for (int i = 0; i < details.length(); i++) {
JSONObject main = details.getJSONObject(i);
Integer date = main.getInt(TAG_DATE);
JSONArray nArray = main.getJSONArray(TAG_NOW);
JSONObject detail = nArray.getJSONObject(0);
Integer iconId = detail.getInt(TAG_ID);
HashMap<String, String> HashF = new HashMap<String, String>();
HashF.put(TAG_DATE, convertDate(date));
HashF.put(TAG_ID, String.valueOf(convertDrawable(iconId)));
fList.add(HashF);
}
} catch (Exception e) {
}
ListAdapter adapter =
new SimpleAdapter(getActivity(),
fList, R.layout.list_item,
new String[]{
TAG_DATE,
TAG_ID
},
new int[]{
R.id.datum,
R.id.icon_fore
});
setListAdapter(adapter);
}
public static String convertDate(Integer Time) {
SimpleDateFormat sdf =
new SimpleDateFormat(
"dd, MMMM", Locale.getDefault());
Calendar kal =
Calendar.getInstance();
kal.setTimeInMillis(Time * 1000L);
sdf.setTimeZone(kal.getTimeZone());
return sdf.format(kal.getTime());
}
public static int convertDrawable(int aId){
int icon = 0;
if(aId == 8300){
icon = R.drawable.draw1;
}
if (aId >= 7010 && actualId < 7919){
icon = R.drawable.draw2;
}
if (aId >= 2010 && actualId <3010) {
icon = R.drawable.draw3;
}
if (aId >= 3010 && actualId < 4010) {
icon = R.drawable.draw4;
}
if (aId >= 6010 && actualId < 7010) {
icon = R.drawable.draw5;
}
if (aId >= 5010 && actualId < 6010) {
icon = R.drawable.draw6;
}
if (aId == 3801){
icon = R.drawable.draw7;
}
if (aId == 8032){
icon = R.drawable.draw8;
}
if (aId == 8083){
icon = R.drawable.draw9;
}
if (aId == 8704) {
icon = R.drawable.draw10;
}
return icon;
}
無論如何看看Bitmap is not a Drawable
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