Android 如何更新baseadapter中由于asynctask导致的按钮文本
由于asynctext内部类“follow”或“unfollow”的结果,我想动态设置follow按钮,但它不能很清楚地工作。只有最小按钮的文本更改。我需要一个解决方案 下面是我的BaseAdapter类:Android 如何更新baseadapter中由于asynctask导致的按钮文本,android,android-asynctask,baseadapter,Android,Android Asynctask,Baseadapter,由于asynctext内部类“follow”或“unfollow”的结果,我想动态设置follow按钮,但它不能很清楚地工作。只有最小按钮的文本更改。我需要一个解决方案 下面是我的BaseAdapter类: public class MainActivityLanguagesAdapter extends BaseAdapter { Context c; private List<MainActivityLanguagesModel> languages_list
public class MainActivityLanguagesAdapter extends BaseAdapter {
Context c;
private List<MainActivityLanguagesModel> languages_list;
Button followButton;
public MainActivityLanguagesAdapter(List<MainActivityLanguagesModel> languages_list, Context c) {
this.languages_list = languages_list;
this.c = c;
}
@Override
public int getCount() {
return languages_list.size();
}
@Override
public Object getItem(int position) {
return languages_list.get(position);
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView(final int position, View convertView, ViewGroup parent) {
LayoutInflater inflater = (LayoutInflater) c
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
if (convertView == null) {
convertView = inflater.inflate(R.layout.cell_main_grid, parent, false);
}
followButton = (Button) convertView.findViewById(R.id.LanguagesCellFollowButton);
ImageView pictureView = (ImageView) convertView.findViewById(R.id.LanguagesCellPicture);
TextView title = (TextView) convertView.findViewById(R.id.LanguagesCellTitle);
Picasso.with(c).load(languages_list.get(position).getImage()).into(pictureView);
title.setText(languages_list.get(position).getTitle());
title.setTextColor(Color.WHITE);
followButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
JSONObject following_Data = new JSONObject();
try {
following_Data.put("token", SessionInfo.login_informations.getToken());
following_Data.put("lang_id", languages_list.get(position).getId());
Log.d("lang_id", String.valueOf(languages_list.get(position).getId()));
} catch (JSONException e) {
e.printStackTrace();
}
new FollowingTask().execute(following_Data.toString());
}
});
return convertView;
}
class FollowingTask extends AsyncTask<String, String, String> {
protected void onPreExecute() {
super.onPreExecute();
}
public String doInBackground(String... params) {
HttpClient httpClient = new DefaultHttpClient();
HttpPost httpPost = new HttpPost(
ServerAddress.server_address + "languages/following");
httpPost.setHeader("content-type", "application/json");
StringEntity entity;
try {
entity = new StringEntity(params[0], HTTP.UTF_8);
httpPost.setEntity(entity);
} catch (Exception e) {
e.printStackTrace();
}
HttpResponse response;
final String petsResult;
try {
response = httpClient.execute(httpPost);
HttpEntity responseEntity = response.getEntity();
petsResult = EntityUtils.toString(responseEntity);
} catch (IOException e) {
e.printStackTrace();
return e.getMessage();
}
Log.d("petsResultString", petsResult.toString());
try {
JSONObject json = new JSONObject(petsResult);
int status = 0;
if (json.isNull("er") && json.getInt("e") == 0) {
JSONObject data = json.getJSONObject("d");
status = data.getInt("status");
}
return String.valueOf(status);
} catch (JSONException e) {
e.printStackTrace();
return e.getMessage();
}
}
public void onPostExecute(String result) {
Log.d("following_result", String.valueOf(result));
if (String.valueOf(result) == "0") {
followButton.setText("FOLLOW");
} else {
followButton.setText("UNFOLLOW");
}
notifyDataSetChanged();
}
}
public类MainActivityLanguagesAdapter扩展BaseAdapter{
上下文c;
私人名单;;
按钮跟随按钮;
公共维护活动语言适配器(列表语言\u列表,上下文c){
this.languages\u list=语言\u list;
这个.c=c;
}
@凌驾
public int getCount(){
返回语言_list.size();
}
@凌驾
公共对象getItem(int位置){
返回语言列表。获取(位置);
}
@凌驾
公共长getItemId(int位置){
返回位置;
}
@凌驾
公共视图getView(最终整数位置、视图转换视图、视图组父视图){
LayoutInflater充气机=(LayoutInflater)c
.getSystemService(上下文布局\充气机\服务);
if(convertView==null){
convertView=充气机。充气(R.layout.cell\u主网格,父网格,false);
}
followButton=(Button)convertView.findViewById(R.id.LanguagesCellFollowButton);
ImageView pictureView=(ImageView)convertView.findViewById(R.id.LanguagesCellPicture);
TextView title=(TextView)convertView.findViewById(R.id.LanguagesCellTitle);
毕加索.with(c).load(语言)_list.get(位置).getImage())到(pictureView);
title.setText(languages_list.get(position.getTitle());
title.setTextColor(Color.WHITE);
followButton.setOnClickListener(新视图.OnClickListener(){
@凌驾
公共void onClick(视图v){
数据后面的JSONObject=新JSONObject();
试一试{
以下是_Data.put(“token”,SessionInfo.login_informations.getToken());
以下是_Data.put(“lang_id”,languages_list.get(position.getId());
Log.d(“lang_id”,String.valueOf(languages_list.get(position.getId()));
}捕获(JSONException e){
e、 printStackTrace();
}
新建followTask().execute(following_Data.toString());
}
});
返回视图;
}
类followTask扩展了AsyncTask{
受保护的void onPreExecute(){
super.onPreExecute();
}
公共字符串doInBackground(字符串…参数){
HttpClient HttpClient=新的DefaultHttpClient();
HttpPost HttpPost=新的HttpPost(
ServerAddress.server_地址+“语言/以下”);
setHeader(“内容类型”、“应用程序/json”);
实体;
试一试{
实体=新的StringEntity(参数[0],HTTP.UTF_8);
httpPost.setEntity(实体);
}捕获(例外e){
e、 printStackTrace();
}
HttpResponse响应;
最终字符串petsResult;
试一试{
response=httpClient.execute(httpPost);
HttpEntity responseEntity=response.getEntity();
petsResult=EntityUtils.toString(responseEntity);
}捕获(IOE异常){
e、 printStackTrace();
返回e.getMessage();
}
Log.d(“petsResultString”,petsResult.toString());
试一试{
JSONObject json=新的JSONObject(petsResult);
int status=0;
if(json.isNull(“er”)&&json.getInt(“e”)==0){
JSONObject data=json.getJSONObject(“d”);
status=data.getInt(“status”);
}
返回字符串.valueOf(状态);
}捕获(JSONException e){
e、 printStackTrace();
返回e.getMessage();
}
}
public void onPostExecute(字符串结果){
Log.d(“跟随_结果”,String.valueOf(结果));
if(字符串值of(结果)=“0”){
followButton.setText(“FOLLOW”);
}否则{
followButton.setText(“UNFOLLOW”);
}
notifyDataSetChanged();
}
}
}当然,只有一个按钮文本被更改。变量followButton仅引用Button的一个实例 如果要更改所有适配器对象,可以在适配器getView()上为每个按钮添加布尔值并设置文本,如下所示:
...
boolean follow = false; // init with value you want
@Override
public View getView(final int position, View convertView, ViewGroup parent) {
...
followButton = (Button) convertView.findViewById(R.id.LanguagesCellFollowButton);
if(follow){
followButton.setText("FOLLOW");
}else {
followButton.setText("UNFOLLOW");
}
...
}
...
public void onPostExecute(String result) {
...
if (String.valueOf(result) == "0") {
follow = true;
} else {
follow = false;
}
notifyDataSetChanged();
}
我就是这样解决的。这是我的完整代码:
Context c;
private List<MainActivityLanguagesModel> languages_list;
int positionClass;
public MainActivityLanguagesAdapter(List<MainActivityLanguagesModel> languages_list, Context c) {
this.languages_list = languages_list;
this.c = c;
}
@Override
public int getCount() {
return languages_list.size();
}
@Override
public Object getItem(int position) {
return languages_list.get(position);
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView(final int position, View convertView, ViewGroup parent) {
LayoutInflater inflater = (LayoutInflater) c
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
if (convertView == null) {
convertView = inflater.inflate(R.layout.cell_main_grid, parent, false);
}
final Button followButton = (Button) convertView.findViewById(R.id.LanguagesCellFollowButton);
ImageView pictureView = (ImageView) convertView.findViewById(R.id.LanguagesCellPicture);
TextView title = (TextView) convertView.findViewById(R.id.LanguagesCellTitle);
Picasso.with(c).load(languages_list.get(position).getImage()).into(pictureView);
title.setText(languages_list.get(position).getTitle());
title.setTextColor(Color.WHITE);
if (languages_list.get(position).getIs_following() == 1)
followButton.setText("UNFOLLOW");
else
followButton.setText("FOLLOW");
followButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
JSONObject following_Data = new JSONObject();
try {
positionClass = position;
Log.d("positionClass1", String.valueOf(positionClass));
following_Data.put("token", SessionInfo.login_informations.getToken());
following_Data.put("lang_id", languages_list.get(position).getId());
} catch (JSONException e) {
e.printStackTrace();
}
new FollowingTask().execute(following_Data.toString());
}
});
return convertView;
}
class FollowingTask extends AsyncTask<String, String, String> {
protected void onPreExecute() {
super.onPreExecute();
}
public String doInBackground(String... params) {
HttpClient httpClient = new DefaultHttpClient();
HttpPost httpPost = new HttpPost(
ServerAddress.server_address + "languages/following");
httpPost.setHeader("content-type", "application/json");
StringEntity entity;
try {
entity = new StringEntity(params[0], HTTP.UTF_8);
httpPost.setEntity(entity);
} catch (Exception e) {
e.printStackTrace();
}
HttpResponse response;
final String petsResult;
try {
response = httpClient.execute(httpPost);
HttpEntity responseEntity = response.getEntity();
petsResult = EntityUtils.toString(responseEntity);
} catch (IOException e) {
e.printStackTrace();
return e.getMessage();
}
Log.d("petsResultString", petsResult.toString());
try {
JSONObject json = new JSONObject(petsResult);
int status = 0;
if (json.isNull("er") && json.getInt("e") == 0) {
JSONObject data = json.getJSONObject("d");
status = data.getInt("status");
}
return String.valueOf(status);
} catch (JSONException e) {
e.printStackTrace();
return e.getMessage();
}
}
public void onPostExecute(String result) {
Log.d("isFollow", String.valueOf(result));
if (languages_list.get(positionClass).getIs_following() == 1)
languages_list.get(positionClass).setIs_following(0);
else
languages_list.get(positionClass).setIs_following(1);
notifyDataSetChanged();
}
}
Context c;
私人名单;;
国际职业分类;
公共维护活动语言适配器(列表语言\u列表,上下文c){
this.languages\u list=语言\u list;
这个.c=c;
}
@凌驾
public int getCount(){
返回语言_list.size();
}
@凌驾
公共对象getItem(int位置){
返回语言列表。获取(位置);
}
@凌驾
公共长getItemId(int位置){
返回位置;
}
@凌驾
公共视图getView(最终整数位置、视图转换视图、视图组父视图){
LayoutInflater充气机=(LayoutInflater)c
.getSystemService(上下文布局\充气机\服务);
if(convertView==null){
convertView=充气机。充气(R.layout.cell\u主网格,父网格,false);
}
final Button followButton=(Button)convertView.findViewById(R.id.LanguagesCellFollowButton);
ImageView pictureView=(ImageView)convertView.findViewById(R.id.LanguagesCellPicture);
TextView title=(TextView)convertView.findViewById(R.id.LanguagesCellTitle);
毕加索.with(c).load(语言)_list.get(位置).getImage())到(pictureView);
title.setText(languages_list.get(position.getTitle());
title.setTextColor(Color.WHITE);
if(语言列表.get(位置).getIs\u following()==1)
followButton.setText(“UNFOLLOW”);
其他的
followButton.setText(“FOLLOW”);
followButton.setOnClickListener(新视图.OnClickListener(){
@凌驾
公共void onClick(视图v){
数据后面的JSONObject=新JSONObject();
试一试{
职位类别=职位;
Log.d(“位置类别1”,字符串