1
我正在使用列表視圖並創建自定義適配器。每次單擊按鈕時，我都想嘗試發佈帖子。正在聲明的按鈕與列表視圖中的每個項目相關聯。我遇到了三個問題：使用我自定義適配器中的變量時遇到問題
1）當我點擊類似按鈕時，點擊列表中的「隨機」按鈕。
2）當我點擊它時，它會更新類似計數，但是當我向下滾動查看視圖時，再向上滾動，類似的計數就會重置。 3）當我點擊like時，like count會改變，現在當我點擊一個不同的帖子時，像count一樣改變，就像第一次點擊的button一樣。
我一直堅持這一段時間任何幫助，非常感謝。
下面是適配器類代碼：
class PostsAdapter extends ArrayAdapter<Posts> implements View.OnClickListener {
//used to create views from xml
private LayoutInflater layoutInflater;
public PostsAdapter(Context context, int textViewResourceId, List<Posts> posts) {
super(context, textViewResourceId, posts);
layoutInflater = LayoutInflater.from(context);
}
//add to xml from dataset
@Override
// view convertview = recycled view
public View getView(int position, View convertView, ViewGroup parent) {
View view = convertView;
Holder holder = null;
Posts posts = getItem(position);
//checks if recycled view is null, thewn creates new view, if not null, use same view
if(view == null){
view = layoutInflater.inflate(R.layout.activity_posts, null);
Button like = (Button) view.findViewById(R.id.btnLike);
TextView content = (TextView) view.findViewById(R.id.content);
TextView user = (TextView) view.findViewById(R.id.user);
TextView topic = (TextView) view.findViewById(R.id.topic);
TextView date = (TextView) view.findViewById(R.id.date);
TextView likes = (TextView) view.findViewById(R.id.likeCount);
TextView hiddenId = (TextView) view.findViewById(R.id.hiddenID);
holder = new Holder(content, user, topic, date, likes, hiddenId, like);
view.setTag(holder);
like.setTag(holder);
}
else{
holder = (Holder) view.getTag();
}
holder.content.setText(posts.getContent());
holder.user.setText(posts.getUser());
holder.topic.setText(posts.getTopic());
holder.date.setText(posts.getDate());
holder.likes.setText(posts.getLikes());
holder.hiddenId.setText(posts.getId());
holder.like.setOnClickListener(this);
return view;
}
@Override
public void onClick(View v) {
Button like = (Button) v;
Holder holder = (Holder) v.getTag();
Toast.makeText(DisplayPosts.this, "Button: " + like.getText(), Toast.LENGTH_LONG).show();
createLike(holder.like, holder.hiddenId, holder.likes);
}
}
static class Holder{
public TextView content;
public TextView user;
public TextView topic;
public TextView date;
public TextView likes;
public TextView hiddenId;
public Button like;
public Holder(TextView content, TextView user, TextView topic, TextView date, TextView likes, TextView hiddenId, Button like) {
this.content = content;
this.user = user;
this.topic = topic;
this.date = date;
this.likes = likes;
this.hiddenId = hiddenId;
this.like = like;
}
}
這裏是createLike方法：
private void createLike(final Button like, final TextView hiddenid, final TextView likes){
final String hid = hiddenid.getText().toString().trim();
if(like.getText().toString().equalsIgnoreCase("like")){
like.setText("UnLike");
StringRequest stringRequest = new StringRequest(Request.Method.POST, Config.SERVER_ADDRESS + "LikePost.php",
new Response.Listener<String>() {
@Override
public void onResponse(String response) {
JSONObject jsonObject = null;
try {
//json string to jsonobject
jsonObject = new JSONObject(response);
//get json sstring created in php and store to JSON Array
result2 = jsonObject.getJSONArray(Config.json_array_likes);
//get username from json array
likes.setText(getLikeCount(result2));
} catch (JSONException e) {
e.printStackTrace();
}
}
},
new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
}
}){
@Override
protected Map<String, String> getParams() throws AuthFailureError {
// corresponding values.
Map<String,String> hashMap = new HashMap<>();
//maps specified string key, to specified string value
hashMap.put(Config.hid, hid);
return hashMap;
}
};
//add string request to queue
RequestQueue requestQueue = Volley.newRequestQueue(this);
requestQueue.add(stringRequest);
}
else{
like.setText("Like");
}
}
private String getLikeCount(JSONArray jsonArray){
String lc = null;
for(int i = 0; i < jsonArray.length(); i++) {
try {
JSONObject json = jsonArray.getJSONObject(i);
likeCount.add(json.getString(Config.getLike));
lc = likeCount.get(0);
} catch (JSONException e) {
}
}
return lc;
}
沒有解決問題。雖然謝謝！ – cdub