我有一个ListAdapter和ListView RowLayout，我在2个片段中使用了ListView s。问题是如何处理ListView项目行按钮单击。公共RowLayout中有2个按钮，无论显示的片段如何，这些按钮都具有相同的功能。我搜索了它并找到了解决方案here。但是在这个帖子按钮中，只有在我有两个片段时才会调用一个活动。那么我们如何在Adapter中确保从单击其布局按钮调用特定片段？
ListAdapter：
public class ListAdapter extends ArrayAdapter<GridItem> {
private Context mContext;
int resource;
private ArrayList<GridItem> mListData = new ArrayList<GridItem>();
public ListAdapter(Context mContext, int resource, ArrayList<GridItem> mListData) {
super(mContext, resource, mListData);
this.resource = resource;
this.mContext = mContext;
this.mListData = mListData;
}
public void setListData(ArrayList<GridItem> mListData) {
this.mListData = mListData;
notifyDataSetChanged();
}
@Override
public GridItem getItem(int position) {
return super.getItem(position);
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
View v = convertView;
ViewHolder holder;
if (v == null) {
holder = new ViewHolder();
LayoutInflater inflater = ((Activity) mContext).getLayoutInflater();
v = inflater.inflate(resource, parent, false);
holder.image = (ImageView) v.findViewById(R.id.item_image);
holder.name = (TextView) v.findViewById(R.id.item_name);
holder.regtdemail = (TextView) v.findViewById(R.id.item_regtdemail);
holder.follow = (Button)v.findViewById(R.id.follow);
holder.remove = (Button)v.findViewById(R.id.remove);
v.setTag(holder);
} else {
holder = (ViewHolder) v.getTag();
}
GridItem item = mListData.get(position);
Picasso.with(mContext)
.load(item.getImage())
.placeholder(R.drawable.placeholder)
.fit()
.into(holder.image);
holder.name.setText(item.getName());
holder.regtdemail.setText(item.getRegtdEmail());
holder.follow.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
}
});
holder.remove.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
}
});
return v;
}
class ViewHolder {
ImageView image;
TextView name, regtdemail;
Button follow, remove;
}
}
第二片段：
public class SuggestFriend extends Fragment{
private ListView mListView;
private GridItem newItem;
private ListAdapter mListAdapter;
private ArrayList<GridItem> mGridData;
public static final String KEY_USERID = "user_id", SPORTS_ID = "sports_id";
private static final String MUTUAL_FOLLOWERS = "http://example.com/api/member/follow-suggestions/";
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
return inflater.inflate(R.layout.suggestfriend, container, false);
}
@Override
public void onViewCreated(View view, @Nullable Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
mListView = (ListView)view.findViewById(R.id.list_view);
mGridData = new ArrayList<>();
mListAdapter = new ListAdapter(getContext(), R.layout.common_row, mGridData);
mListView.setAdapter(mListAdapter);
loadmutualfollowers();
}
private void loadmutualfollowers() {
StringRequest stringRequest = new StringRequest(Request.Method.POST, MUTUAL_FOLLOWERS,
new Response.Listener<String>() {
@Override
public void onResponse(String response) {
try {
JSONObject jObj = new JSONObject(response);
System.out.println(jObj);
String status = jObj.getString("status");
// Now check status value
if (status.equals("0")) {
Toast.makeText(getActivity(), "There was some error! Please try again.", Toast.LENGTH_LONG).show();
} else if (status.equals("1")) {
JSONArray result = jObj.getJSONArray("result");
for (int i = 0; i < result.length(); i++) {
JSONObject json_data = result.getJSONObject(i);
String name = json_data.getString("name");
String regtdemail = json_data.getString("username");
String user_id = json_data.getString("user_id");
newItem = new GridItem();
newItem.setName(name);
newItem.setRegtdEmail(regtdemail);
newItem.setUserId(user_id);
if(json_data.has("profile_picture")){
newItem.setImage(json_data.getString("profile_picture"));
}else{
Uri path = Uri.parse("android.resource://com.sam.fitlincsearch/" + R.drawable.default_profile);
String image_def = path.toString();
newItem.setImage(image_def);
}
mGridData.add(newItem);
}
mListAdapter.notifyDataSetChanged();
} else {
String errorMsg = jObj.getString("error_msg");
Toast.makeText(getActivity(), errorMsg, Toast.LENGTH_LONG).show();
}
} catch (JSONException e) {
// JSON error
e.printStackTrace();
Toast.makeText(getActivity(), "Json error: " + e.getMessage(), Toast.LENGTH_LONG).show();
}
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
Toast.makeText(getActivity(), "VolleyError" + error.toString(), Toast.LENGTH_LONG).show();
}
}) {
@Override
protected Map<String, String> getParams() {
Map<String, String> params = new HashMap<String, String>();
params.put(KEY_USERID, "1");
return params;
}
};
RequestQueue requestQueue = Volley.newRequestQueue(getActivity());
requestQueue.add(stringRequest);
}
}
第一段：
public class TopContenders extends Fragment {
private ListView mListView;
private GridItem newItem;
private ListAdapter mListAdapter;
private ArrayList<GridItem> mGridData;
public static final String KEY_USERID = "user_id", SPORTS_ID = "sports_id";
private static final String TOP_MEMBERS = "http://example.com/api/top-member/";
Button follow, unfollow;
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
return inflater.inflate(R.layout.topcontenders, container, false);
}
@Override
public void onViewCreated(View view, @Nullable Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
mListView = (ListView)view.findViewById(R.id.list_view);
mGridData = new ArrayList<>();
mListAdapter = new ListAdapter(getContext(), R.layout.common_row, mGridData);
mListView.setAdapter(mListAdapter);
loadtopmembers();
}
private void loadtopmembers() {
StringRequest stringRequest = new StringRequest(Request.Method.POST, TOP_MEMBERS,
new Response.Listener<String>() {
@Override
public void onResponse(String response) {
try {
JSONObject jObj = new JSONObject(response);
System.out.println(jObj);
String status = jObj.getString("status");
// Now check status value
if (status.equals("0")) {
Toast.makeText(getActivity(), "There was some error! Please try again.", Toast.LENGTH_LONG).show();
} else if (status.equals("1")) {
JSONArray result = jObj.getJSONArray("result");
for (int i = 0; i < result.length(); i++) {
JSONObject json_data = result.getJSONObject(i);
String name = json_data.getString("name");
String regtdemail = json_data.getString("username");
String user_id = json_data.getString("user_id");
String sports_id = json_data.getString("sports_id");
newItem = new GridItem();
newItem.setName(name);
newItem.setRegtdEmail(regtdemail);
newItem.setUserId(user_id);
if(json_data.has("profile_picture")) {
newItem.setImage(json_data.getString("profile_picture"));
}else{
Uri path = Uri.parse("android.resource://com.sam.fitlincsearch/" + R.drawable.default_profile);
String image_def = path.toString();
newItem.setImage(image_def);
}
/* if(sports_id.equals("1")){
newItem.setSportsId("Weight");
}else if(sports_id.equals("2")){
newItem.setSportsId("Cycle");
}else if(sports_id.equals("3")){
newItem.setSportsId("Swim");
}else if(sports_id.equals("4")){
newItem.setSportsId("Run");
} */
mGridData.add(newItem);
}
mListAdapter.notifyDataSetChanged();
} else {
String errorMsg = jObj.getString("error_msg");
Toast.makeText(getActivity(), errorMsg, Toast.LENGTH_LONG).show();
}
} catch (JSONException e) {
// JSON error
e.printStackTrace();
Toast.makeText(getActivity(), "Json error: " + e.getMessage(), Toast.LENGTH_LONG).show();
}
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
Toast.makeText(getActivity(), "VolleyError" + error.toString(), Toast.LENGTH_LONG).show();
}
}) {
@Override
protected Map<String, String> getParams() {
Map<String, String> params = new HashMap<String, String>();
params.put(KEY_USERID, "1");
return params;
}
};
RequestQueue requestQueue = Volley.newRequestQueue(getActivity());
requestQueue.add(stringRequest);
}
}
答案 0 :(得分：0)
您可以在适配器getView()方法中将当前视图设置为按钮，在button.setOnClickListener()中，您可以获取此视图并执行任何操作。
使用setTag()和getTag()。
示例：
在适配器getView()中：
holder.btnPlus = (Button) convertView.findViewById(R.id.btnPlusdessert);
holder.btnPlus.setTag(R.integer.btnplusview,convertView);
按钮onClickListener()
holder.btnPlus.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
View tempView =(View) v.getTag(R.integer.btnplusview);
现在您可以看到行布局的完整视图，您可以使用tempView获取其他textview或按钮或其他内容。