Android 使用Listview中的复选框获取所选项目
我正在创建一个Android应用程序，其中我有一个列表视图，显示安装在我手机上的所有应用程序 我的ListView是定制的，它包含一个图标、TextView和复选框，图标的用途是显示应用程序的图标，TextView是显示应用程序的名称，复选框的用途是确定我在ListView中选择的项目 在应用程序中单击按钮时，如何确定在ListView行中选择的复选框是什么？我是Android新手，所以我不知道该怎么做 这是我的密码：Android 使用Listview中的复选框获取所选项目,android,listview,Android,Listview,我正在创建一个Android应用程序，其中我有一个列表视图，显示安装在我手机上的所有应用程序 我的ListView是定制的，它包含一个图标、TextView和复选框，图标的用途是显示应用程序的图标，TextView是显示应用程序的名称，复选框的用途是确定我在ListView中选择的项目 在应用程序中单击按钮时，如何确定在ListView行中选择的复选框是什么？我是Android新手，所以我不知道该怎么做 这是我的密码： public class AppInfo { public Draw
public class AppInfo {
public Drawable icon;
public String applicationName;
public AppInfo(){
super();
}
public AppInfo(Drawable icon, String applicationName){
super();
this.icon = icon;
this.applicationName = applicationName;
}
}
导入android.app.Activity；
导入android.content.pm.ApplicationInfo；
导入android.content.pm.PackageManager；
导入android.os.Bundle；
导入android.widget.ArrayAdapter；
导入android.widget.BaseAdapter；
导入android.widget.ListView；
导入android.widget.TextView；
导入java.util.ArrayList；
导入java.util.List；
导入android.content.pm.PackageInfo；
公共类CacheActivity扩展了活动{
@凌驾
创建时受保护的void（Bundle savedInstanceState）{
super.onCreate（savedInstanceState）；
setContentView（R.layout.activity\u缓存）；
最终ListView listApplication=（ListView）findViewById（R.id.listApplication）；
ApplicationInfo ApplicationInfo=getApplicationInfo（）；
PackageManager pm=getPackageManager（）；
List pInfo=new ArrayList（）；
pInfo.addAll（pm.getInstalledPackages（0））；
AppInfo app_info[]=新AppInfo[pInfo.size（）]；
int计数器=0；
用于（PackageInfo项目：pInfo）{
试一试{
applicationInfo=pm.getApplicationInfo（item.packageName，1）；
应用程序信息[计数器]=新的应用程序信息（pm.getApplicationInfo（applicationInfo），
valueOf（pm.getApplicationLabel（applicationInfo））；
系统输出打印项次（计数器）；
}
捕获（例外e）{
System.out.println（e.getMessage（））；
}
计数器++；
}
AppInfoAdapter=新的AppInfoAdapter（此，R.layout.listview\u item\u行，app\u info）；
setAdapter（适配器）；
}
}
mListView.setOnItemClickListener(new OnItemClickListener()
{
@Override
public void onItemClick(AdapterView<?> parent, View v, int position, long id)
{
CheckBox cb = (CheckBox) v.findViewById(R.id.checkbox_id);
}
});
public class CustomAdapter extends BaseAdapter {
private Context context;
public static ArrayList<Model> modelArrayList;
public CustomAdapter(Context context, ArrayList<Model> modelArrayList) {
this.context = context;
this.modelArrayList = modelArrayList;
}
@Override
public int getViewTypeCount() {
return getCount();
}
@Override
public int getItemViewType(int position) {
return position;
}
@Override
public int getCount() {
return modelArrayList.size();
}
@Override
public Object getItem(int position) {
return modelArrayList.get(position);
}
@Override
public long getItemId(int position) {
return 0;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
final ViewHolder holder;
if (convertView == null) {
holder = new ViewHolder(); LayoutInflater inflater = (LayoutInflater) context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = inflater.inflate(R.layout.lv_item, null, true);
holder.checkBox = (CheckBox) convertView.findViewById(R.id.cb);
holder.tvAnimal = (TextView) convertView.findViewById(R.id.animal);
convertView.setTag(holder);
}else {
// the getTag returns the viewHolder object set as a tag to the view
holder = (ViewHolder)convertView.getTag();
}
holder.checkBox.setText("Checkbox "+position);
holder.tvAnimal.setText(modelArrayList.get(position).getAnimal());
holder.checkBox.setChecked(modelArrayList.get(position).getSelected());
holder.checkBox.setTag(R.integer.btnplusview, convertView);
holder.checkBox.setTag( position);
holder.checkBox.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
View tempview = (View) holder.checkBox.getTag(R.integer.btnplusview);
TextView tv = (TextView) tempview.findViewById(R.id.animal);
Integer pos = (Integer) holder.checkBox.getTag();
Toast.makeText(context, "Checkbox "+pos+" clicked!", Toast.LENGTH_SHORT).show();
if(modelArrayList.get(pos).getSelected()){
modelArrayList.get(pos).setSelected(false);
}else {
modelArrayList.get(pos).setSelected(true);
}
}
});
return convertView;
}
private class ViewHolder {
protected CheckBox checkBox;
private TextView tvAnimal;
}
}
mListView.setOnItemClickListener（新的OnItemClickListener（）
{
@凌驾
public void onItemClick（AdapterView父视图、视图v、整型位置、长id）
{
复选框cb=（复选框）v.findViewById（R.id.CheckBox\u id）；
}
});
public class MainActivity extends Activity {
AppInfoAdapter adapter ;
AppInfo app_info[] ;
@Override
protected void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
final ListView listApplication = (ListView)findViewById(R.id.listApplication);
Button b= (Button) findViewById(R.id.button1);
b.setOnClickListener(new OnClickListener()
{
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
StringBuilder result = new StringBuilder();
for(int i=0;i<adapter.mCheckStates.size();i++)
{
if(adapter.mCheckStates.get(i)==true)
{
result.append(app_info[i].applicationName);
result.append("\n");
}
}
Toast.makeText(MainActivity.this, result, 1000).show();
}
});
ApplicationInfo applicationInfo = getApplicationInfo();
PackageManager pm = getPackageManager();
List<PackageInfo> pInfo = new ArrayList<PackageInfo>();
pInfo.addAll(pm.getInstalledPackages(0));
app_info = new AppInfo[pInfo.size()];
int counter = 0;
for(PackageInfo item: pInfo){
try{
applicationInfo = pm.getApplicationInfo(item.packageName, 1);
app_info[counter] = new AppInfo(pm.getApplicationIcon(applicationInfo),
String.valueOf(pm.getApplicationLabel(applicationInfo)));
System.out.println(counter);
}
catch(Exception e){
System.out.println(e.getMessage());
}
counter++;
}
adapter = new AppInfoAdapter(this, R.layout.listview_item_row, app_info);
listApplication.setAdapter(adapter);
}
}
公共类MainActivity扩展活动{
AppInfoAdapter；
AppInfo app_info[]；
@凌驾
创建时受保护的void（Bundle savedInstanceState）{
super.onCreate（savedInstanceState）；
setContentView（R.layout.activity_main）；
最终ListView listApplication=（ListView）findViewById（R.id.listApplication）；
按钮b=（按钮）findViewById（R.id.button1）；
b、 setOnClickListener（新的OnClickListener（）
{
@凌驾
公共void onClick（视图v）{
//TODO自动生成的方法存根
StringBuilder结果=新建StringBuilder（）；
对于（int i=0；i我也有类似的问题。提供的xml示例作为单个ListViewItem放置，我无法单击项本身，但复选框起作用
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="horizontal" android:layout_width="match_parent"
android:layout_height="50dp"
android:id="@+id/source_container"
>
<ImageView
android:layout_width="40dp"
android:layout_height="40dp"
android:id="@+id/menu_source_icon"
android:background="@drawable/bla"
android:layout_margin="5dp"
/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/menu_source_name"
android:text="Test"
android:textScaleX="1.5"
android:textSize="20dp"
android:padding="8dp"
android:layout_weight="1"
android:layout_gravity="center_vertical"
android:textColor="@color/source_text_color"/>
<CheckBox
android:layout_width="40dp"
android:layout_height="match_parent"
android:id="@+id/menu_source_check_box"/>
</LinearLayout>
复选框控件。这是一个简化，但非常简单。。。
如前所述，您需要将焦点标志添加到复选框中。
您还需要添加clickable标志，如下所示：
android:focusable="false"
android:clickable="false"
然后从ListView
（ListFragment
在我的例子中）中控制复选框状态onListItemClick
事件
这是示例onListItemClick方法：
public void onListItemClick(ListView l, View v, int position, long id) {
super.onListItemClick(l, v, position, id);
//Get related checkbox and change flag status..
CheckBox cb = (CheckBox)v.findViewById(R.id.rowDone);
cb.setChecked(!cb.isChecked());
Toast.makeText(getActivity(), "Click item", Toast.LENGTH_SHORT).show();
}
[带复选框的自定义ListView]
如果customlayout使用复选框，则必须将复选框设置为focusable=false
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<TextView android:id="@+id/rowTextView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:padding="10dp"
android:textSize="16sp" >
</TextView>
<CheckBox android:id="@+id/CheckBox01"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:padding="10dp"
android:layout_alignParentRight="true"
android:layout_marginRight="6sp"
android:focusable="false"> // <---important
</CheckBox>
</RelativeLayout>
//使复选框不可聚焦，然后在列表项上单击执行此操作，
这里codevalue是位置
Arraylist<Integer> selectedschools=new Arraylist<Integer>();
lvPickSchool.setOnItemClickListener(new AdapterView.OnItemClickListener()
{
@Override
public void onItemClick(AdapterView<?> parent, View view, int codevalue, long id)
{
CheckBox cb = (CheckBox) view.findViewById(R.id.cbVisitingStatus);
cb.setChecked(!cb.isChecked());
if(cb.isChecked())
{
if(!selectedschool.contains(codevaule))
{
selectedschool.add(codevaule);
}
}
else
{
if(selectedschool.contains(codevaule))
{
selectedschool.remove(codevaule);
}
}
}
});
arraylistselectedschools=newarraylist（）；
lvPickSchool.setOnItemClickListener（新的AdapterView.OnItemClickListener（）
{
@凌驾
public void onItemClick（AdapterView父级、视图、int-codevalue、长id）
{
复选框cb=（复选框）view.findViewById（R.id.cbVisitingStatus）；
cb.setChecked（！cb.isChecked（））；
if（cb.isChecked（））
{
如果（！selectedschool.contains（codevaule））
{
选择学校。添加（代码规则）；
}
}
其他的
{
如果（所选学校包含（代码规则））
{
所选学校。删除（codevaule）；
}
}
}
});
“复选框用于确定我在列表视图中选择的项目”
只需在Adapter类中使用setTag（）方法将标记添加到复选框中，另一端使用getTag（）方法
在复选框的xml代码中，只需输入“android:onClick=“your method”属性
<CheckBox
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:onClick="checkboxClicked"
android:id="@+id/checkBox_Service_row"
android:layout_marginRight="5dp"
android:layout_alignParentTop="true"
android:layout_alignParentRight="true"
android:layout_alignParentEnd="true" />
完整参考资料，请参阅：
将所选项目传递给下一个活动
主要源代码如下
首先创建一个模型类
public class Model {
private boolean isSelected;
private String animal;
public String getAnimal() {
return animal;
}
public void setAnimal(String animal) {
this.animal = animal;
}
public boolean getSelected() {
return isSelected;
}
public void setSelected(boolean selected) {
isSelected = selected;
}
}
然后在适配器类中，将标记设置为复选框
public void onListItemClick(ListView l, View v, int position, long id) {
super.onListItemClick(l, v, position, id);
//Get related checkbox and change flag status..
CheckBox cb = (CheckBox)v.findViewById(R.id.rowDone);
cb.setChecked(!cb.isChecked());
Toast.makeText(getActivity(), "Click item", Toast.LENGTH_SHORT).show();
}
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<TextView android:id="@+id/rowTextView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:padding="10dp"
android:textSize="16sp" >
</TextView>
<CheckBox android:id="@+id/CheckBox01"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:padding="10dp"
android:layout_alignParentRight="true"
android:layout_marginRight="6sp"
android:focusable="false"> // <---important
</CheckBox>
</RelativeLayout>
Arraylist<Integer> selectedschools=new Arraylist<Integer>();
lvPickSchool.setOnItemClickListener(new AdapterView.OnItemClickListener()
{
@Override
public void onItemClick(AdapterView<?> parent, View view, int codevalue, long id)
{
CheckBox cb = (CheckBox) view.findViewById(R.id.cbVisitingStatus);
cb.setChecked(!cb.isChecked());
if(cb.isChecked())
{
if(!selectedschool.contains(codevaule))
{
selectedschool.add(codevaule);
}
}
else
{
if(selectedschool.contains(codevaule))
{
selectedschool.remove(codevaule);
}
}
}
});
@Override
public void onBindViewHolder(MyViewHolder holder, int position) {
ServiceHelper helper=userServices.get(position);
holder.tvServiceName.setText(helper.getServiceName());
if(!helper.isServiceStatus()){
holder.btnAdd.setVisibility(View.VISIBLE);
holder.btnAdd.setTag(helper.getServiceName());
holder.checkBoxServiceStatus.setVisibility(View.INVISIBLE);
}else{
holder.checkBoxServiceStatus.setVisibility(View.VISIBLE);
//This Line
holder.checkBoxServiceStatus.setTag(helper.getServiceName());
holder.btnAdd.setVisibility(View.INVISIBLE);
}
}
<CheckBox
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:onClick="checkboxClicked"
android:id="@+id/checkBox_Service_row"
android:layout_marginRight="5dp"
android:layout_alignParentTop="true"
android:layout_alignParentRight="true"
android:layout_alignParentEnd="true" />
protected void checkboxClicked(View view)
{
CheckBox checkBox=(CheckBox) view;
String tagName="";
if(checkBox.isChecked()){
tagName=checkBox.getTag().toString();
deleteServices.add(tagName);
checkboxArrayList.add(checkBox);
}else {
checkboxArrayList.remove(checkBox);
tagName=checkBox.getTag().toString();
if(deleteServices.size()>0&&deleteServices.contains(tagName)){
deleteServices.remove(tagName);
}
}
}
public class Model {
private boolean isSelected;
private String animal;
public String getAnimal() {
return animal;
}
public void setAnimal(String animal) {
this.animal = animal;
}
public boolean getSelected() {
return isSelected;
}
public void setSelected(boolean selected) {
isSelected = selected;
}
}
public class CustomAdapter extends BaseAdapter {
private Context context;
public static ArrayList<Model> modelArrayList;
public CustomAdapter(Context context, ArrayList<Model> modelArrayList) {
this.context = context;
this.modelArrayList = modelArrayList;
}
@Override
public int getViewTypeCount() {
return getCount();
}
@Override
public int getItemViewType(int position) {
return position;
}
@Override
public int getCount() {
return modelArrayList.size();
}
@Override
public Object getItem(int position) {
return modelArrayList.get(position);
}
@Override
public long getItemId(int position) {
return 0;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
final ViewHolder holder;
if (convertView == null) {
holder = new ViewHolder(); LayoutInflater inflater = (LayoutInflater) context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = inflater.inflate(R.layout.lv_item, null, true);
holder.checkBox = (CheckBox) convertView.findViewById(R.id.cb);
holder.tvAnimal = (TextView) convertView.findViewById(R.id.animal);
convertView.setTag(holder);
}else {
// the getTag returns the viewHolder object set as a tag to the view
holder = (ViewHolder)convertView.getTag();
}
holder.checkBox.setText("Checkbox "+position);
holder.tvAnimal.setText(modelArrayList.get(position).getAnimal());
holder.checkBox.setChecked(modelArrayList.get(position).getSelected());
holder.checkBox.setTag(R.integer.btnplusview, convertView);
holder.checkBox.setTag( position);
holder.checkBox.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
View tempview = (View) holder.checkBox.getTag(R.integer.btnplusview);
TextView tv = (TextView) tempview.findViewById(R.id.animal);
Integer pos = (Integer) holder.checkBox.getTag();
Toast.makeText(context, "Checkbox "+pos+" clicked!", Toast.LENGTH_SHORT).show();
if(modelArrayList.get(pos).getSelected()){
modelArrayList.get(pos).setSelected(false);
}else {
modelArrayList.get(pos).setSelected(true);
}
}
});
return convertView;
}
private class ViewHolder {
protected CheckBox checkBox;
private TextView tvAnimal;
}
}
public class Model {
private boolean isSelected;
private String animal;
public String getAnimal() {
return animal;
}
public void setAnimal(String animal) {
this.animal = animal;
}
public boolean getSelected() {
return isSelected;
}
public void setSelected(boolean selected) {
isSelected = selected;
}
}
holder.checkBox.setTag(R.integer.btnplusview, convertView);
holder.checkBox.setTag( position);
holder.checkBox.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
View tempview = (View) holder.checkBox.getTag(R.integer.btnplusview);
TextView tv = (TextView) tempview.findViewById(R.id.animal);
Integer pos = (Integer) holder.checkBox.getTag();
Toast.makeText(context, "Checkbox "+pos+" clicked!", Toast.LENGTH_SHORT).show();
if(modelArrayList.get(pos).getSelected()){
modelArrayList.get(pos).setSelected(false);
}else {
modelArrayList.get(pos).setSelected(true);
}
}
});
public class CustomAdapter extends BaseAdapter {
private Context context;
public static ArrayList<Model> modelArrayList;
public CustomAdapter(Context context, ArrayList<Model> modelArrayList) {
this.context = context;
this.modelArrayList = modelArrayList;
}
@Override
public int getViewTypeCount() {
return getCount();
}
@Override
public int getItemViewType(int position) {
return position;
}
@Override
public int getCount() {
return modelArrayList.size();
}
@Override
public Object getItem(int position) {
return modelArrayList.get(position);
}
@Override
public long getItemId(int position) {
return 0;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
final ViewHolder holder;
if (convertView == null) {
holder = new ViewHolder(); LayoutInflater inflater = (LayoutInflater) context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = inflater.inflate(R.layout.lv_item, null, true);
holder.checkBox = (CheckBox) convertView.findViewById(R.id.cb);
holder.tvAnimal = (TextView) convertView.findViewById(R.id.animal);
convertView.setTag(holder);
}else {
// the getTag returns the viewHolder object set as a tag to the view
holder = (ViewHolder)convertView.getTag();
}
holder.checkBox.setText("Checkbox "+position);
holder.tvAnimal.setText(modelArrayList.get(position).getAnimal());
holder.checkBox.setChecked(modelArrayList.get(position).getSelected());
holder.checkBox.setTag(R.integer.btnplusview, convertView);
holder.checkBox.setTag( position);
holder.checkBox.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
View tempview = (View) holder.checkBox.getTag(R.integer.btnplusview);
TextView tv = (TextView) tempview.findViewById(R.id.animal);
Integer pos = (Integer) holder.checkBox.getTag();
Toast.makeText(context, "Checkbox "+pos+" clicked!", Toast.LENGTH_SHORT).show();
if(modelArrayList.get(pos).getSelected()){
modelArrayList.get(pos).setSelected(false);
}else {
modelArrayList.get(pos).setSelected(true);
}
}
});
return convertView;
}
private class ViewHolder {
protected CheckBox checkBox;
private TextView tvAnimal;
}
}