EditText in a list aren't working the way they

问题:

I have a problem with EditText fields in a ListActivity.

The code complies all right, but the functionality is strange, typing in the first field and hiding the keyboard after this the text appears in another editfield.

Help me with my logical issue

package com.example.helloandroid;

import android.app.ListActivity;
import android.content.Context;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.EditText;
import android.widget.TextView;

public class AddComp extends ListActivity {


static final int DATE_DIALOG_ID = 0;

        private class EfficientAdapter extends BaseAdapter {
            private LayoutInflater mInflater;
            private String[] attitude_names;
            private String[] attitude_values;

            public EfficientAdapter(Context context) {
                mInflater = LayoutInflater.from(context);
                attitude_names = context.getResources().getStringArray(R.array.COMP_ATTITUDE_NAME);
                attitude_values = new String[attitude_names.length];
            }

            public Object getItem(int position) {
                return position;
            }

            public long getItemId(int position) {
                return position;
            }

            public View getView(int position, View convertView, ViewGroup parent) {
                ViewHolder holder;

                if (convertView == null) {
                    convertView = mInflater.inflate(R.layout.addcomp_attitude_row, null);

                    holder = new ViewHolder();
                    holder.Attitude_Name = (TextView) convertView.findViewById(R.id.addcomp_att_name);
                    holder.Attitude_Value = (EditText) convertView.findViewById(R.id.addcomp_att_value);

                    convertView.setTag(holder);
                } else {
                    holder = (ViewHolder) convertView.getTag();
                }

                holder.Attitude_Name.setText(attitude_names[position]);
                holder.Attitude_Value.setHint(attitude_names[position]);
                attitude_values[position] = holder.Attitude_Value.getText().toString();



                return convertView;
            }

            class ViewHolder {
                TextView Attitude_Name;
                EditText Attitude_Value; 
            }

            @Override
            public int getCount() {
                return attitude_names.length;
            }
        }


    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        setListAdapter(new EfficientAdapter(this));

        setContentView(R.layout.addcomp);
    }
}

回答1:

Problem solved by adding Entry in manifest and the use of a TextWatcher (this is needed because the view of one list row is internly called several times that means that for 500 list entries the programm uses only afew intances of the row.view-class to be mor efficient) therfore it is need to use a text watcher that saves the changed data in a extra datastructur for exsample an array..

        private class EfficientAdapter extends BaseAdapter {
            private LayoutInflater mInflater;
            private String[] attitude_names;
            public String[] attitude_values;
            private String name;

            public EfficientAdapter(Context context) {
                mInflater = LayoutInflater.from(context);
                attitude_names = context.getResources().getStringArray(R.array.COMP_ATTITUDE_NAME);
                attitude_values = new String[attitude_names.length];
            }

            public Object getItem(int position) {
                return position;
            }

            public long getItemId(int position) {
                return position;
            }

            public View getView(int position, View convertView, ViewGroup parent) {
                final ViewHolder holder;

                if (convertView == null) {
                    convertView = mInflater.inflate(R.layout.addcomp_attitude_row, null);

                    holder = new ViewHolder();
                    holder.Attitude_Name = (TextView) convertView.findViewById(R.id.addcomp_att_name);
                    holder.Attitude_Value = (EditText) convertView.findViewById(R.id.addcomp_att_value);
                    holder.Attitude_Value.addTextChangedListener(new TextWatcher()
                        {
                            public void afterTextChanged(Editable edt) 
                            {
                                attitude_values[holder.ref] = edt.toString();
                            }

                            public void beforeTextChanged(CharSequence arg0, int arg1, int arg2, int arg3) {}

                            public void onTextChanged(CharSequence arg0, int arg1, int arg2, int arg3) {
                                //attitude_values[ref] = Attitude_Value.getText().toString();
                            }
                        });

                    convertView.setTag(holder);
                } else {
                    holder = (ViewHolder) convertView.getTag();
                }


                holder.ref=position;
                holder.Attitude_Name.setText(attitude_names[position]);
                holder.Attitude_Value.setHint(attitude_names[position]);
                holder.Attitude_Value.setText(attitude_values[position]);




                return convertView;
            }

            class ViewHolder {
                TextView Attitude_Name;
                EditText Attitude_Value; 
                int ref;



            }

            @Override
            public int getCount() {
                return attitude_names.length;
            }
        }

回答2:

This will help you

``

private class EfficientAdapter extends BaseAdapter {
            private LayoutInflater mInflater;
            private String[] attitude_names;
            public String[] attitude_values;
            private String name;
    public static HashMap<Integer,String> myList=new HashMap<Integer,String>();

            public EfficientAdapter(Context context) {
                mInflater = LayoutInflater.from(context);
                attitude_names = context.getResources().getStringArray(R.array.COMP_ATTITUDE_NAME);
                attitude_values = new String[attitude_names.length];
            }
    // initialize myList
    for(int i=0;i<attitude_names.length;i++)
    {
       myList.put(i,"");
    }


            public Object getItem(int position) {
                return position;
            }

            public long getItemId(int position) {
                return position;
            }

            public View getView(int position, View convertView, ViewGroup parent) {
                final ViewHolder holder;

                if (convertView == null) {
                    convertView = mInflater.inflate(R.layout.addcomp_attitude_row, null);

                    holder = new ViewHolder();
                    holder.Attitude_Name = (TextView) convertView.findViewById(R.id.addcomp_att_name);
                    holder.Attitude_Value = (EditText) convertView.findViewById(R.id.addcomp_att_value);
                    holder.Attitude_Value.addTextChangedListener(new TextWatcher()
                        {
                            public void afterTextChanged(Editable edt) 
                            {
                                 myList.put(pos,s.toString.trim());
                                attitude_values[holder.ref] = edt.toString();
                            }

                            public void beforeTextChanged(CharSequence arg0, int arg1, int arg2, int arg3) {}

                            public void onTextChanged(CharSequence arg0, int arg1, int arg2, int arg3) {
                                //attitude_values[ref] = Attitude_Value.getText().toString();
                            }
                        });

                    convertView.setTag(holder);
                } else {
                    holder = (ViewHolder) convertView.getTag();
                }


                holder.ref=position;
                holder.Attitude_Name.setText(attitude_names[position]);
                holder.Attitude_Value.setHint(attitude_names[position]);
                holder.Attitude_Value.setText(myList.get(position));




                return convertView;
            }

            class ViewHolder {
                TextView Attitude_Name;
                EditText Attitude_Value; 
                int ref;



            }

            @Override
            public int getCount() {
                return attitude_names.length;
            }
        }

Here I have included a HashMap object which will keep on eye of what EditText contains value.And when you scroll the listview,it will be rendered again by calling its getView method.

In this code,when you firstly load listview,all your edittext will be with no text.once you enter some text,it will be noted in myList.So when you again render the list,your text would be prevented.

回答3:

I found the reason the behaviour of the strange focusing one has to add android:windowSoftInputMode="adjustPan" as value to the activity in the Projects Manifest but on the other hand the problem that often more than one value of the edidfield is changed is not solved rightnow