Question

听到我使用自定义ListView与TextView和CheckBox。但我想在CheckBox中一次选择单一选择一个CheckBox选择，然后另一个是取消选择使用BaseAdapter 但这段代码不能正常工作.. 请给我建议..thnks

@Override
public View getView(final int position, View view, ViewGroup parent) {
    Integer selected_position = -1;
    holder = new ViewHolder();
    final Items itm = rowItem.get(position);
    LayoutInflater layoutInflater = (LayoutInflater) context
            .getSystemService(Activity.LAYOUT_INFLATER_SERVICE);
    if (view == null) {

        view = layoutInflater.inflate(R.layout.activity_custom_list,
                parent, false);

        holder.tvItemName = (TextView) view.findViewById(R.id.textView1);
        holder.check = (CheckBox) view.findViewById(R.id.checkBox1);
        view.setTag(holder);

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

    holder.tvItemName.setText(itm.getItems());

    if (position == selected_position)
        holder.check.setChecked(true);
    else
        holder.check.setChecked(false);

    holder.check.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View v) {

            if (holder.check.isChecked()) {
                selected_position = position;
            } else {
                selected_position = -1;
            }
            notifyDataSetChanged();

        }
    });

    return view;
}}

Answer 1

使用带有文本视图和复选框的自定义列表视图和单选复选框 很多尝试然后我终于得到了解决方案我希望它对你有用的代码... 此代码帮助您创建自定义列表视图与文本视图和复选框，然后您选择一个复选框，如果您选择另一个复选框，第一个应自动取消选择.....谢谢...

<强> activity_main.xml中

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.example.listviewdemo2.MainActivity" >

<ListView
    android:id="@+id/listView1"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_alignParentLeft="true"
    android:layout_alignParentTop="true" />
</RelativeLayout>

<强> activity_custom_list.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/LinearLayout1"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context="com.example.listviewdemo2.CustomListActivity" >

<LinearLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:background="@android:color/darker_gray" >

    <TextView
        android:id="@+id/textView1"
        android:layout_width="80dp"
        android:layout_height="wrap_content"
        android:layout_marginLeft="20dp"
        android:layout_marginTop="4dp"
        android:layout_weight="0.39"
        android:textAppearance="?android:attr/textAppearanceMedium" />

    <CheckBox
        android:id="@+id/checkBox1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginLeft="150dp"
        android:layout_marginTop="4dp"/>
</LinearLayout> </LinearLayout>

<强> String.xml

<string-array name="name">
   <item>Laptop</item>
    <item>Mobile</item>
    <item>Desktop</item>
    <item>TV</item>
    <item>Pendrive</item>
    <item>Router</item>
    <item>Notebook</item>
    <item>Tablet</item>
    <item>I-pad</item>
    <item>Bluetooth</item>
    <item>HomeTheator</item>
</string-array>

<强> MainActivity.java

String[] ItemName;
List<Items> rowItem;
ListView list;
 @Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    rowItem = new ArrayList<Items>();
    ItemName = getResources().getStringArray(R.array.name);

    for(int i = 0 ; i < ItemName.length ; i++)
    {
        Items itm = new Items(ItemName[i]);
        rowItem.add(itm);
    }

    list = (ListView) findViewById(R.id.listView1);
    CustomListActivity adapter = new CustomListActivity(this, rowItem);
    list.setAdapter(adapter);
}

<强> Items.java

公共类项目{

private String items;
 private boolean selected;


public Items(String items) {

    this.items = items;

}

public String getItems() {

    return items;
}

public void setItemName(String name) {

    this.items = name;
}
public boolean getSelected() {
    return selected;
}

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

<强> CustomListActivity.java

public class CustomListActivity extends BaseAdapter {

Context context;
List<Items> rowItem;
View listView;
boolean checkState[];

ViewHolder holder;

public CustomListActivity(Context context, List<Items> rowItem) {

    this.context = context;
    this.rowItem = rowItem;
    checkState = new boolean[rowItem.size()];

}

@Override
public int getCount() {

    return rowItem.size();
}

@Override
public Object getItem(int position) {

    return rowItem.get(position);

}

@Override
public long getItemId(int position) {

    return rowItem.indexOf(getItem(position));

}

public class ViewHolder {
    TextView tvItemName;
    CheckBox check;
}

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

    holder = new ViewHolder();
    final Items itm = rowItem.get(position);
    LayoutInflater layoutInflater = (LayoutInflater) context
            .getSystemService(Activity.LAYOUT_INFLATER_SERVICE);

    if (view == null) {

        listView = new View(context);
        listView = layoutInflater.inflate(R.layout.activity_custom_list,
                parent, false);

        holder.tvItemName = (TextView) listView
                .findViewById(R.id.textView1);
        holder.check = (CheckBox) listView.findViewById(R.id.checkBox1);
        listView.setTag(holder);

    } else {
        listView = (View) view;
        holder = (ViewHolder) listView.getTag();
    }

    holder.tvItemName.setText(itm.getItems());

    holder.check.setChecked(checkState[position]);

    holder.check.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View arg0) {

            for(int i=0;i<checkState.length;i++)
            {
                if(i==position)
                {
                    checkState[i]=true;
                }
                else
                {
                    checkState[i]=false;
                }
            }
            notifyDataSetChanged();

        }
    });
    return listView;
}}

显示输出： -

enter image description here

Answer 2

如果您想要一个具有单一选择create(float& tp, void* form, char* title);的自定义ListView，您可以使用以下内容：

https://stackoverflow.com/a/12003125/5778152

使用带有TextView和CheckBox的Custome ListView和CheckBox的单一选择

2 个答案: