Question

我在listView中有Checkbox和EditText以及Textview。它从列表中获取文本视图的值。将动态检查复选框。同样，EditText也可以动态输入。现在我的问题是，当我在编辑文本中输入文本后滚动列表视图（向上和向下）时，我无法获得键入的值。我也选中了复选框。但是使用这个位置，我设置正确。我不知道如何正确地将EditText值设置为列表。请帮我。这是我的代码：

main.xml :(用于启动的主要xml）

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >

<ListView
android:id="@+id/my_list"
android:layout_width="fill_parent"
android:layout_height="250px" />
<Button 
android:text="Save" 
android:id="@+id/btnSave" 
android:layout_width="wrap_content" 
android:layout_height="wrap_content"/>

</LinearLayout>

row.xml :( ListView行）

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="horizontal" >

<TextView
android:id="@+id/label"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@+id/label"
android:textSize="30sp"/>

<CheckBox
android:id="@+id/check"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>
<EditText 
android:text=""
android:id="@+id/txtAddress"
android:layout_width="150px"
android:layout_height="wrap_content"/>
</LinearLayout>

Model.Java :(这是POJO类）

package com.checkboxlistview;

public class Model {

private String name;
private boolean selected;
private String address;

public String getAddress() {
    return address;
}

public void setAddress(String address) {
    this.address = address;
}

public void setName(String name) {
    this.name = name;
}

public Model(String name) {
    this.name = name;
}

public String getName() {
    return name;
}

public boolean isSelected() {
    return selected;
}

public void setSelected(boolean selected) {
    this.selected = selected;
}

}

MyAdapter.Java :(这用于使用转换器和持有者保持列表视图中的视图）

package com.checkboxlistview;

import java.util.List;
import android.app.Activity;
import android.text.Editable;
import android.text.TextWatcher;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.EditText;
import android.widget.TextView;

public class MyAdapter extends ArrayAdapter<Model> implements TextWatcher {

private final List<Model> list;
private final Activity context;
int listPosititon;

public MyAdapter(Activity context, List<Model> list) {
    super(context, R.layout.row, list);
    this.context = context;
    this.list = list;
}

static class ViewHolder {
    protected TextView text;
    protected CheckBox checkbox;
    protected EditText address;
}

@Override
public View getView(int position, View convertView, ViewGroup parent) {
    listPosititon = position;
    ViewHolder viewHolder = null;
    if (convertView == null) {
        LayoutInflater inflator = context.getLayoutInflater();
        convertView = inflator.inflate(R.layout.row, null);
        viewHolder = new ViewHolder();
        viewHolder.text = (TextView) convertView.findViewById(R.id.label);
        viewHolder.checkbox = (CheckBox) convertView
                .findViewById(R.id.check);
        viewHolder.address = (EditText) convertView
                .findViewById(R.id.txtAddress);
        viewHolder.checkbox
                .setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {

@Override
public void onCheckedChanged(CompoundButton buttonView,
boolean isChecked) {
int getPosition = (Integer) buttonView.getTag(); 
//Here we get the position that we have  set for the checkbox using setTag.
list.get(getPosition).setSelected(
buttonView.isChecked()); 
// Set the value of checkbox to maintain its state.
}
});
        viewHolder.address.addTextChangedListener(this);

        convertView.setTag(viewHolder);
        convertView.setTag(R.id.label, viewHolder.text);
        convertView.setTag(R.id.check, viewHolder.checkbox);
        convertView.setTag(R.id.txtAddress, viewHolder.address);
    } else {
        viewHolder = (ViewHolder) convertView.getTag();
    }
    viewHolder.checkbox.setTag(position); // This line is important.

    viewHolder.text.setText(list.get(position).getName());
    viewHolder.checkbox.setChecked(list.get(position).isSelected());
    if (list.get(position).getAddress() != null) {
        viewHolder.address.setText(list.get(position).getAddress() + "");
    } else {
        viewHolder.address.setText("");
    }

    return convertView;
}

@Override
public void afterTextChanged(Editable s) {
    list.get(listPosititon).setAddress(s.toString());
}

@Override
public void beforeTextChanged(CharSequence arg0, int arg1, int arg2,
        int arg3) {
    // TODO Auto-generated method stub

}

@Override
public void onTextChanged(CharSequence arg0, int arg1, int arg2, int arg3) {
    // TODO Auto-generated method stub

}
}

MainActivity.java（这是活动）：

package com.checkboxlistview;

import java.util.ArrayList;
import java.util.List;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.ListView;
import android.widget.Toast;

public class MainActivity extends Activity { 
 ListView listView;
 Button btnSave;
    ArrayAdapter<Model> adapter;
    List<Model> list = new ArrayList<Model>();

    public void onCreate(Bundle icicle) {
        super.onCreate(icicle);
        setContentView(R.layout.main);

        listView = (ListView) findViewById(R.id.my_list);
        btnSave = (Button)findViewById(R.id.btnSave);
        adapter = new MyAdapter(this,getModel());
        listView.setAdapter(adapter);
        btnSave.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View v) {

                for (int i = 0; i < list.size(); i++) {
                    Toast.makeText(getBaseContext(), "Name : "+list.get(i).getName() +" Selected: "+list.get(i).isSelected(), Toast.LENGTH_SHORT).show();

                }
            }
        });
    }


    private List<Model> getModel() {
        list.add(new Model("Linux"));
        list.add(new Model("Windows7"));
        list.add(new Model("Suse"));
        list.add(new Model("Eclipse"));
        list.add(new Model("Ubuntu"));
        list.add(new Model("Solaris"));
        list.add(new Model("Android"));
        list.add(new Model("iPhone"));
        list.add(new Model("Java"));
        list.add(new Model(".Net"));
        list.add(new Model("PHP"));
        return list;
    }
}

代码中没有错误。它运行良好。即使我上下滚动，我也可以保持复选框位置并显示在相同位置。但我无法正确设置EditText值。请帮帮我。提前谢谢。

Answer 1

您可以使用自定义列表视图来实现此目的。

使用edittext查找listview的示例为here

Answer 2

只需保持viewHolder.address.setTag（位置），就可以完美地欢呼。

适配器类：

package com.qzick.adapter;

import java.util.ArrayList;
import android.content.Context;
import android.text.Editable;
import android.text.TextWatcher;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.CompoundButton.OnCheckedChangeListener;
import android.widget.EditText;
import android.widget.TextView;

import com.example.qzick.R;
import com.qzick.model.Get_All_Class_Model;

public class Get_Class_Adapter extends BaseAdapter {
    protected ArrayList<Get_All_Class_Model> get_class_details;
    LayoutInflater inflater;
    Context context;
    private int x = 1;

    public Get_Class_Adapter(Context context,
            ArrayList<Get_All_Class_Model> get_class_details) {
        this.get_class_details = get_class_details;
        this.inflater = LayoutInflater.from(context);
        this.context = context;

    }

    @Override
    public int getCount() {
        // TODO Auto-generated method stub
        return get_class_details.size();
    }

    @Override
    public Object getItem(int position) {
        // TODO Auto-generated method stub
        return get_class_details.get(position);
    }

    @Override
    public long getItemId(int position) {
        // TODO Auto-generated method stub
        return 0;
    }

    @Override
    public View getView(final int position, View convertView, ViewGroup parent) {
        final ViewHolder holder;
        if (convertView == null) {
            holder = new ViewHolder();
            convertView = this.inflater.inflate(
                    R.layout.activity_adapter_class_ll, parent, false);

            holder.textclass = (TextView) convertView
                    .findViewById(R.id.text_class_ll);

            holder.txtid = (TextView) convertView.findViewById(R.id.text_id_ll);

            holder.checkclass = (CheckBox) convertView
                    .findViewById(R.id.check_class_LL);

            holder.edtsection = (EditText) convertView
                    .findViewById(R.id.edttxt_addsection_ll);

            holder.checkclass
                    .setOnCheckedChangeListener(new OnCheckedChangeListener() {

                        @Override
                        public void onCheckedChanged(CompoundButton buttonView,
                                boolean isChecked) {

                            int getPosition = (Integer) buttonView.getTag();

                            get_class_details.get(getPosition).setChecked(
                                    buttonView.isChecked());

                            notifyDataSetChanged();
                        }
                    });

            convertView.setTag(holder);
            convertView.setTag(R.id.check_class_LL, holder.checkclass);
            convertView.setTag(R.id.edttxt_addsection_ll, holder.edtsection);

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

        holder.checkclass.setTag(position);
        holder.edtsection.setTag(position);

        holder.edtsection.addTextChangedListener(new TextWatcher() {

            @Override
            public void onTextChanged(CharSequence s, int start, int before,
                    int count) {
                int pos = (Integer) holder.edtsection.getTag();

                get_class_details.get(pos).setEdtsections(s.toString());

            }

            @Override
            public void beforeTextChanged(CharSequence s, int start, int count,
                    int after) {

            }

            @Override
            public void afterTextChanged(Editable s) {

            }
        });

        holder.txtid.setText(get_class_details.get(position).getId());
        holder.textclass.setText(get_class_details.get(position).getText());
        holder.edtsection.setText(get_class_details.get(position)
                .getEdtsections());

        holder.textclass.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {

                x++;

                if (x % 2 == 0) {
                    holder.checkclass.setChecked(false);

                } else {
                    holder.checkclass.setChecked(true);
                }

            }
        });

        holder.checkclass.setChecked(get_class_details.get(position)
                .isChecked());
        return convertView;
    }

    private class ViewHolder {
        TextView textclass, txtid;`enter code here`
        CheckBox checkclass;
        EditText edtsection;
    }
}

Answer 3

使用listView处理EditText的便捷解决方案：（不需要持有人或RecycleView或其他任何东西）

简要说明：

1）在给视图充气时，在getView方法中，将myTextWatcher应用于editText。将此EditText传递给myTextWatcher（）

2）在getView方法中找到EditText并将位置设置为editText.setTag [每次。不仅是在视图膨胀时。]

3）定义MyTextWatcher。它应该引用应用了它的EditText。

4）myTextWatcher.onTextChanged（）将读取设置为editText的标记并完成所需的工作

修改您的Adapter类的getView（）方法：

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

        if(convertView==null){
            convertView = LayoutInflater.from(getContext()).inflate(R.layout.single_row_layout,parent,false);
            EditText et = convertView.findViewById(R.id.idEditText);
            et.addTextChangedListener(new MyTextWatcher(et));
        }

    //This is again required to find reference to EditText... so that 'position' can be applied on to it as 'tag' EACH time.    
    EditText editText = (EditText) convertView.findViewById(R.id.idEditText);;

    //This tag will be used inside onTextChanged()
    editText.setTag(position);

}

将MyTextWatcher类定义为：

private class MyTextWatcher implements TextWatcher{
    //int position;
    EditText et;
    public MyTextWatcher(EditText editText){
        this.et = editText;
    }

    @Override
    public void beforeTextChanged(CharSequence s, int start, int count, int after) {

    }

    @Override
    public void onTextChanged(CharSequence s, int start, int before, int count) {
        if(et.getTag()!=null){
            // This is required to ensure EditText is edited by user and not through program
            if(et.hasFocus()){
                 int position = (int)et.getTag();
                 String newText = et.getText()+"";
                 //Implement your actions here........
                 //you can get require things/ views from listView.getChildAt(position).. 
            }

        }

    }

    @Override
    public void afterTextChanged(Editable s) {

    }
}

如何在listview中添加EditText并在所有行中动态获取其值？

3 个答案: