android - 自定义适配器 Listview 中的 Spinner OnItemSelectedListener 递归调用而不选择任何项目

Question

我有带有两个微调器 View 的自定义适配器 ListView 。

每个微调器都有一个后台进程。初始化时，微调 View .OnItemSelectedListener 被不必要地递归调用，而无需对监听器进行任何外部输入

类文件

public class ClientListAdapter extends BaseAdapter implements SpinnerAdapter  {
Context context;
int layoutResourceId;
ArrayList<GetClientListDetail> data = null;
ArrayList<GetClientListDetail> temp = null;
String ID, str;
Typeface typeface;
PopupWindow cp;
private ProgressDialog progressDialog;

String[] Status1 = new String[] { "Waiting", "Away","No Show"};

String[] Status2 = new String[] { "In Service",
        "Generate Bill", "Completed" };

SpinnerAdapterlist TherapistAdapter = null;
ArrayAdapter<String> StatusAdapter = null;

ArrayList<GetTherapistProperties> TherapistList ;


private LayoutInflater inflater;

RemoveClient RC;
ChangeStatus CS;
ChangeTherapist CT;

ClientListHolder holder ;
int _therapistID;


GetClientListDetail ap;

GetTherapistProperties tp;

boolean networkavailable=false;




public ClientListAdapter(Context context, int textViewResourceId,
        ArrayList<GetClientListDetail> gld, ArrayList<GetTherapistProperties> therapislist) {
    super();
    this.layoutResourceId = textViewResourceId;
    this.context = context;
    this.data = gld;
    this.mGalleryCount1 = gld.size();
    this.mGalleryCount2=gld.size();
    this.TherapistList=therapislist;


    inflater=LayoutInflater.from(context);
    Resources res = context.getResources();

    TherapistAdapter = new SpinnerAdapterlist(context,
            R.layout.spinnerlayout, TherapistList);

    StatusAdapter = new ArrayAdapter<String>(context,
            android.R.layout.simple_dropdown_item_1line, Status1);
}

@Override
public int getCount() {

    return data.size();
}

@Override
public GetClientListDetail getItem(int position) {

    return data.get(position);
}

@Override
public long getItemId(int position) {

    return 0;
}

@Override
public View getView(final int position, View convertView, ViewGroup parent) {
    View row = convertView;



    if (row == null) {

        holder = new ClientListHolder();


        row = inflater.inflate(layoutResourceId, parent, false);

        holder.tv_no = (TextView) row
                .findViewById(R.id.tv_clientwaitlayout_no);
        holder.tv_name = (TextView) row
                .findViewById(R.id.tv_clientwaitlayout_name);
        holder.tv_status = (Spinner) row
                .findViewById(R.id.tv_clientwaitlayout_status);
        holder.tv_therapist = (Spinner) row
                .findViewById(R.id.tv_clientwaitlayout_therapist);



        holder.iv_edit=(ImageView) row.findViewById(R.id.btn_clientwaitlayout_edit);

        holder.iv_action = (ImageView) row
                .findViewById(R.id.btn_clientwaitlayout_action);
        holder.tv_unchange_therapist=(TextView) row.findViewById(R.id.tv_clientwaitlayout_unchange_name);
        holder.tv_unchange_status=(TextView) row.findViewById(R.id.tv_clientwaitlayout_unchange_status);



        row.setTag(holder);
    } else {
        holder = (ClientListHolder) row.getTag();
    }


    holder.tv_therapist.setAdapter(TherapistAdapter);
    holder.tv_status.setAdapter(StatusAdapter);


    ap = data.get(position);
    tp=TherapistList.get(position);

    holder.tv_name.setText(ap.getCLDName());
    holder.tv_no.setText(ap.getCLDNo());


    if(ap.getCLDStatus().equals("1") ){
        Log.d("LOOP","Sub If condition");

        holder.tv_therapist.setVisibility(View.VISIBLE);
        holder.tv_status.setVisibility(View.VISIBLE);
        holder.tv_unchange_therapist.setVisibility(View.GONE);
        holder.tv_unchange_status.setVisibility(View.GONE);
        holder.iv_action.setVisibility(View.GONE);
        holder.iv_edit.setVisibility(View.VISIBLE);

        try {
            for(int x=0;x<TherapistList.size();x++){
                if(ap.getCLDTherapist().equals(TherapistList.get(x).getID())){

                    holder.tv_therapist.setSelection(x);

                }else{  

                }
            }
        } catch (NumberFormatException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

        try {
            holder.tv_status.setSelection(Integer.parseInt(ap.getCLDStatus()) - 1);
        } catch (ArrayIndexOutOfBoundsException e2) {
            // TODO Auto-generated catch block
            holder.tv_status.setSelection(0);
        }


    }else if(ap.getCLDStatus().equals("2") | ap.getCLDStatus().equals("6")){

        holder.tv_therapist.setVisibility(View.VISIBLE);
        holder.tv_status.setVisibility(View.VISIBLE);
        holder.tv_unchange_therapist.setVisibility(View.GONE);
        holder.tv_unchange_status.setVisibility(View.GONE);
        holder.iv_action.setVisibility(View.GONE);
        holder.iv_edit.setVisibility(View.GONE);

        try {
            for(int x=0;x<TherapistList.size();x++){
                if(ap.getCLDTherapist().equals(TherapistList.get(x).getID())){

                    holder.tv_therapist.setSelection(x);

                }else{  

                }
            }
        } catch (NumberFormatException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

        try {
            if(ap.getCLDStatus().equals("2")){
                holder.tv_status.setSelection(1);
            }else{
                holder.tv_status.setSelection(2);   
            }
        } catch (ArrayIndexOutOfBoundsException e2) {
            // TODO Auto-generated catch block
            holder.tv_status.setSelection(0);
        }


    }else{

        holder.tv_therapist.setVisibility(View.GONE);
        holder.tv_status.setVisibility(View.GONE);
        holder.tv_unchange_therapist.setVisibility(View.VISIBLE);
        holder.tv_unchange_status.setVisibility(View.VISIBLE);
        holder.iv_action.setVisibility(View.VISIBLE);
        holder.iv_edit.setVisibility(View.GONE);


        for(int y=0;y<TherapistList.size();y++){
            if(ap.getCLDTherapist().equals(TherapistList.get(y).getID())){

                holder.tv_unchange_therapist.setText(TherapistList.get(y).getName());

                break;
            }else{

                holder.tv_unchange_therapist.setText("Not Available");
            } 
        }
        if (ap.getCLDStatus().equals("2")) {

            holder.tv_unchange_status.setText(Status1[1]);

        } else if (ap.getCLDStatus().equals("3")) {

            holder.tv_unchange_status.setText(Status2[0]);

        } else if (ap.getCLDStatus().equals("4")) {
            holder.tv_unchange_status.setText(Status2[1]);

        } else if (ap.getCLDStatus().equals("5")) {
            holder.tv_unchange_status.setText(Status2[2]);

        } else if (ap.getCLDStatus().equals("6")) {

            holder.tv_unchange_status.setText(Status1[2]);
        }

    }



    holder.tv_therapist.setTag(ap.getCLDClientID());

    holder.tv_status.setTag(ap.getCLDClientID()); 

    holder.iv_edit.setTag(ap.getCLDClientID());

    holder.iv_action.setTag(ap.getCLDClientID());

    holder.iv_action.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View v) {
            // TODO Auto-generated method stub
            try { 
                ImageView b = (ImageView) v;
                String id = b.getTag().toString();
                Log.d("ID is", id);

                Intent CDV=new Intent(context, TabSample.class);
                CDV.putExtra("ID",  id);
                //CDV.addFlags(Intent.FLAG_ACTIVITY_REORDER_TO_FRONT);
                //context.startActivity(CDV);
                ((Activity) context).startActivityForResult(CDV,5);

                try {
                    Log.d("POSITION", "" + position + " "
                            + data.get(position).getCLDClientID());
                } catch (ArrayIndexOutOfBoundsException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }



            } catch (Exception e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }

        }
    });

    holder.tv_status
            .setOnItemSelectedListener(new OnItemSelectedListener() {

                @Override
                public void onItemSelected(AdapterView<?> arg0, View arg1,
                        int arg2, long arg3) {
                    // TODO Auto-generated method stub


                        int id=arg2+1;


                        try {
                            try {


                                CS=new ChangeStatus();
                                CS.setClientID(data.get(position).getCLDClientID());
                                CS.setSalonID("1");
                                if(id==3){
                                    CS.setStatus("6");
                                }else{
                                    CS.setStatus(String.valueOf(id));
                                }


                                new LoadChangeStatus().execute();
                            } catch (ArrayIndexOutOfBoundsException e) {
                                // TODO Auto-generated catch block
                                e.printStackTrace();
                            }

                        } catch (Exception e) {
                            // TODO Auto-generated catch block
                            e.printStackTrace();
                        }


                }

                @Override
                public void onNothingSelected(AdapterView<?> arg0) {
                    // TODO Auto-generated method stub

                }
            });


    holder.tv_therapist
    .setOnItemSelectedListener(new OnItemSelectedListener() {

        @Override
        public void onItemSelected(AdapterView<?> arg0, View arg1,
                int arg2, long arg3) {
            // TODO Auto-generated method stub

                try { 

                    try {
                        Spinner sp = (Spinner) arg0;

                        String str = sp.getTag().toString();

                        TextView th_id=(TextView)arg1.findViewById(R.id.spnradptno);

                        CT=new ChangeTherapist();
                        CT.setClientID(str);
                        CT.setSalonID("1");
                        CT.setTherapist(th_id.getText().toString());

                        new LoadChangeTherapist().execute();

                        Log.d("SPR TXT", th_id.getText().toString()+" "+position+" "+str);

                    } catch (ArrayIndexOutOfBoundsException e) {
                        // TODO Auto-generated catch block 
                        Log.d("Error in spinner",e.toString());
                    } 

                } catch (Exception e) {
                    // TODO Auto-generated catch block
                    Log.d("Error2 in spinner",e.toString());
                }


        }

        @Override
        public void onNothingSelected(AdapterView<?> arg0) {
            // TODO Auto-generated method stub
            Log.d("Nothing","Selected");
        }
    });




    holder.iv_edit.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View v) {
            // TODO Auto-generated method stub

            try { 
                ImageView b = (ImageView) v;
                String id = b.getTag().toString();
                Log.d("ID is", id);

                Intent CDV=new Intent(context, TabSample.class);
                CDV.putExtra("ID",  id);


                ((Activity) context).startActivityForResult(CDV,5);


                try {
                    Log.d("POSITION", "" + position + " "
                            + data.get(position).getCLDClientID());
                } catch (ArrayIndexOutOfBoundsException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }



            } catch (Exception e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }

        }
    });





    return row;
}

static class ClientListHolder {

    TextView tv_no;
    TextView tv_name;
    Spinner tv_therapist;
    Spinner tv_status;
    ImageView iv_action;

    ImageView iv_edit;
    TextView tv_unchange_therapist;
    TextView tv_unchange_status;

}

public class LoadChangeStatus extends AsyncTask<Integer, Integer, Integer> {
    // Before running code in the separate thread
    int LoadChangeStatus= 0;

    @Override
    protected void onPreExecute() {
        // Create a new progress dialog
        progressDialog = new ProgressDialog(context);
        // Set the progress dialog to display a horizontal progress bar
        // progressDialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);

        progressDialog.setProgressStyle(ProgressDialog.STYLE_SPINNER);
        // Set the dialog title to 'Loading...'
        progressDialog.setTitle("Loading...");
        // Set the dialog message to 'Loading application View, please
        // wait...'
        progressDialog.setMessage("Loading, please wait...");
        // This dialog can't be canceled by pressing the back key
        progressDialog.setCancelable(false);
        // This dialog isn't indeterminate
        progressDialog.setIndeterminate(false);
        // The maximum number of items is 100

        // Set the current progress to zero

        // Display the progress dialog
        progressDialog.show();

    }

    // The code to be executed in a background thread.
    @Override
    protected Integer doInBackground(Integer... params) {

        try {
            // temp.clear();
            networkavailable=new Network().isNetworkAvailable(context);
            if(networkavailable){
                temp = CS.Change_Status(CS, context);   
                LoadChangeStatus=1;
            }else{
                LoadChangeStatus=2;
            }

        } catch (Exception e) {
            // TODO Auto-generated catch block
            Log.d("ERROR", "LoadChangeStatus backgroung");
        }
        return null;
    }

    // Update the progress
    @Override
    protected void onProgressUpdate(Integer... values) {
        // set the current progress of the progress dialog

    }

    // after executing the code in the thread
    @Override
    protected void onPostExecute(Integer result) {
        // close the progress dialog
        progressDialog.dismiss();

        if(LoadChangeStatus==1){
            try {
                data.clear();
                data.addAll(temp);
                notifyDataSetChanged();
            } catch (Exception e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }               
        }else if(LoadChangeStatus==2){
            Toast.makeText(context, "Network Not Available", Toast.LENGTH_LONG).show();
        }else{
            Toast.makeText(context, "Changing Status Failed. Please Try Again", Toast.LENGTH_LONG).show();
        }

    }
}

public class LoadChangeTherapist extends
        AsyncTask<Integer, Integer, Integer> {
    // Before running code in the separate thread
    int LoadChangeTherapist = 0;


    @Override
    protected void onPreExecute() {
        // Create a new progress dialog
        progressDialog = new ProgressDialog(context);
        // Set the progress dialog to display a horizontal progress bar
        // progressDialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);

        progressDialog.setProgressStyle(ProgressDialog.STYLE_SPINNER);
        // Set the dialog title to 'Loading...'
        progressDialog.setTitle("Loading...");
        // Set the dialog message to 'Loading application View, please
        // wait...'
        progressDialog.setMessage("Loading, please wait...");
        // This dialog can't be canceled by pressing the back key
        progressDialog.setCancelable(false);
        // This dialog isn't indeterminate
        progressDialog.setIndeterminate(false);
        // The maximum number of items is 100

        // Set the current progress to zero

        // Display the progress dialog
        progressDialog.show();
    }

    // The code to be executed in a background thread.
    @Override
    protected Integer doInBackground(Integer... params) {

        try {
            // temp.clear();
            networkavailable=new Network().isNetworkAvailable(context);
            if(networkavailable){
                temp = CT.Get_Change_Therapist(CT, context);    
                LoadChangeTherapist=1;
            }else{
                LoadChangeTherapist=2;
            }

        } catch (Exception e) {
            // TODO Auto-generated catch block
            Log.d("ERROR", "LoadChangeStatus backgroung");
        }
        return null;
    }

    // Update the progress
    @Override
    protected void onProgressUpdate(Integer... values) {
        // set the current progress of the progress dialog

    }

    // after executing the code in the thread
    @Override
    protected void onPostExecute(Integer result) {
        // close the progress dialog
        progressDialog.dismiss();
        if (LoadChangeTherapist == 1) {
            try {
                data.clear();
                data.addAll(temp);
                notifyDataSetChanged();

            } catch (Exception e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        } else if (LoadChangeTherapist == 2) {
            Toast.makeText(context, "Network Not Available", Toast.LENGTH_LONG).show();
        }else{
            Toast.makeText(context, "Removing Client Failed. Please Try Again", Toast.LENGTH_LONG).show();
        }

    }
}

public class LoadRemoveClient extends AsyncTask<Integer, Integer, Integer> {
    // Before running code in the separate thread
    int LoadRemoveClient = 0;

    @Override
    protected void onPreExecute() {
        // Create a new progress dialog
        progressDialog = new ProgressDialog(context);
        // Set the progress dialog to display a horizontal progress bar
        // progressDialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);

        progressDialog.setProgressStyle(ProgressDialog.STYLE_SPINNER);
        // Set the dialog title to 'Loading...'
        progressDialog.setTitle("Loading...");
        // Set the dialog message to 'Loading application View, please
        // wait...'
        progressDialog.setMessage("Loading, please wait...");
        // This dialog can't be canceled by pressing the back key
        progressDialog.setCancelable(false);
        // This dialog isn't indeterminate
        progressDialog.setIndeterminate(false);
        // The maximum number of items is 100

        // Set the current progress to zero

        // Display the progress dialog
        progressDialog.show();
    }

    // The code to be executed in a background thread.
    @Override
    protected Integer doInBackground(Integer... params) {

        Log.d("ERROR", "LoadRemoveClient backgroung");
        try {
            networkavailable=new Network().isNetworkAvailable(context);
            if(networkavailable){
                temp = RC.Get_Client_List_Detail(RC, context);  
                LoadRemoveClient=1;
            }else{
                LoadRemoveClient=2;
            }

        } catch (Exception e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

        return null;
    }

    // Update the progress
    @Override
    protected void onProgressUpdate(Integer... values) {
        // set the current progress of the progress dialog

    }

    // after executing the code in the thread
    @Override
    protected void onPostExecute(Integer result) {
        // close the progress dialog
        progressDialog.dismiss();
        if (LoadRemoveClient == 1) {
            try {
                data.clear();
                data.addAll(temp);
                notifyDataSetChanged();
            } catch (Exception e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        } else if (LoadRemoveClient == 2) {
            Toast.makeText(context, "Network Not Available", Toast.LENGTH_LONG).show();
        }else{
            Toast.makeText(context, "Removing Client Failed. Please Try Again", Toast.LENGTH_LONG).show();
        }


    }
}

}

如何避免在初始化自定义适配器 ListView 时不必要地调用微调器 View 的 view.OnItemSelectedListener

Answer 1

您无法在初始化时停止或避免调用 onItemSelectedListener。但是您可以通过声明一个整数并将值设置为 0 来防止这种情况，并且在调用 getview 方法时，检查具有数据大小的整数(您的数组列表大小)。如果整数小于大小而不是增加整数值，否则执行你的背景工作。但这不是正确的做法，因为当您滚动 ListView 时，同样的问题再次出现。如果您有固定的数组列表大小，则可以这样做。最好使用 AutoCompleteTextView 而不是 SpinnerView。