实施例

Question

我计划有一个列表视图，当onlongclick时，将能够选择所有子行/相关行。

实施例

输入：长按用户名/年龄/生日输出：返回用户名，年龄和生日。

问题

如果您长时间点击用户名而不是年龄和生日，则只返回用户名。

我没有在toast中显示年龄和生日值，导致应用显示错误并停止运行。

最新：已于11月26日展示了适配器和对象类

列表视图的自定义布局

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


        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content">

            <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Username:"
            android:background="#FF2400"
            android:textColor="#FFFFFF" />

            <EditText
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:id="@+id/text_user_name"
            android:textColor="#FFFFFF"
            android:background="#FF2400"
            android:text="Username"
            android:gravity="left"/>

        </LinearLayout>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content">

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Age:"
            android:background="#FFFFFF"
            android:textColor="#000000" />

        <EditText
            android:layout_width="match_parent"
            android:layout_weight="0.5"
            android:textColor="#000000"
            android:layout_height="wrap_content"
            android:id="@+id/text_user_age"
            android:background="#FFFFFF"
            android:text="Age"
            android:gravity="left"/>

    </LinearLayout>

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content">

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="Birthday:"
                android:background="#FFFFFF"
                android:textColor="#000000" />

            <EditText
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_weight="0.5"
                android:textColor="#000000"
                android:background="#FFFFFF"
                android:id="@+id/text_user_birthday"
                android:text="Birthday"
                android:gravity="left"/>
        </LinearLayout>
        </LinearLayout>

DataListActivity（Listview活动）

    listview.setOnItemLongClickListener(new AdapterView.OnItemLongClickListener(){
                public boolean onItemLongClick(AdapterView<?> arg0, View v,
                                               int index, long arg3)
                {

AlertDialog.Builder builder = new AlertDialog.Builder(DataListActivity.this);
                builder.setTitle("Notice");
                builder.setMessage("Launching this missile will destroy the entire universe. Is this what you intended to do?");
                final View clicklist = v;
                final int position = index;

builder.setPositiveButton("Launch missile", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        String selname= ((EditText) clicklist.findViewById(R.id.text_user_name)).getText().toString();
                     //   String selage= ((EditText) clicklist.findViewById(R.id.text_user_age)).getText().toString();
                        String selbirthday= ((EditText) clicklist.findViewById(R.id.text_user_birthday)).getText().toString();
                        Toast.makeText(DataListActivity.this,selname + selage + selbirthday,Toast.LENGTH_LONG).show();
    }
                });
                builder.setNegativeButton("Cancel", null);

AlertDialog dialog = builder.create();
                dialog.show();
                return false;
            }
        });

LayoutAdapter

public class ListDataAdapter extends ArrayAdapter{
List list = new ArrayList();

static class LayoutHandler
{
    TextView NAME,AGE,BIRTHDAY;
}
public ListDataAdapter(Context context, int resource) {
    super(context, resource);
}

@Override
public void add (Object object)
{
    super.add(object);
    list.add(object);
}

@Override
public int getCount(){
    return list.size();
}

@Override
public Object getItem(int position)
{
    return list.get(position);
}

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

    View row = convertView;
    LayoutHandler layoutHandler;
    if (row==null)
    {
        LayoutInflater layoutInflater = (LayoutInflater) this.getContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        row = layoutInflater.inflate(R.layout.row_layout,parent,false);
        layoutHandler = new LayoutHandler();
        layoutHandler.NAME = (TextView) row.findViewById(R.id.text_user_name);
        layoutHandler.AGE = (TextView) row.findViewById(R.id.text_user_age);
        layoutHandler.BIRTHDAY = (TextView) row.findViewById(R.id.text_user_birthday);
    }
    else
    {
        layoutHandler = (LayoutHandler) row.getTag();
    }
    DataProvider dataProvider = (DataProvider) this.getItem(position);
    layoutHandler.NAME.setText(dataProvider.getName());
    layoutHandler.AGE.setText(dataProvider.getAge());
    layoutHandler.BIRTHDAY.setBIRTHDAY(dataProvider.getBirthday());


    return row;
}

@Override
public void clear()
{
    list.clear();
}

}

public class DataProvider {

private String Name;
private String Age;
private String Birthday;

.... getter和setters方法

Answer 1

更好的方法是

1）为示例数据创建自定义类并添加您的属性想要在那个班级中展示。

2）创建一个Adapter并使用Data类的arraylist填充你的适配器。

3）使用onItemClicklistener从listview中检索值。

Answer 2

修改你的吐司

?x,y

选择同一组的多个相关行onlongclick进行列表视图

实施例

问题

2 个答案: