Java 如何计算listview中勾选的复选框数
我有一个自定义的数组适配器,它正在处理列表视图。 每行有两个复选框。总共有五行。 我希望能够计算勾选的复选框数量,然后在Stand1中显示该数字 所以基本上项目布局是这样的 stand1内部有一个列表视图和一个文本视图。 java调用一个名为CustomArrayAdaptor的数组适配器。 我希望能够计算点击的复选框数量,并将数据发送回stand1 我对android的开发还很陌生,所以如果有人能把我推向正确的方向,那就太好了 这是我的密码 Stand1.xmlJava 如何计算listview中勾选的复选框数,java,android,list,listview,checkbox,Java,Android,List,Listview,Checkbox,我有一个自定义的数组适配器,它正在处理列表视图。 每行有两个复选框。总共有五行。 我希望能够计算勾选的复选框数量,然后在Stand1中显示该数字 所以基本上项目布局是这样的 stand1内部有一个列表视图和一个文本视图。 java调用一个名为CustomArrayAdaptor的数组适配器。 我希望能够计算点击的复选框数量,并将数据发送回stand1 我对android的开发还很陌生,所以如果有人能把我推向正确的方向,那就太好了 这是我的密码 Stand1.xml <?xml versio
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent" android:layout_height="match_parent">
<ListView
android:layout_width="fill_parent"
android:layout_height="446dp"
android:id="@+id/Stand1list"
android:scrollIndicators="right"
android:smoothScrollbar="true">
</ListView>
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Send Score To Databse"
android:id="@+id/sendtodb"
android:textSize="12dp"
android:clickable="true"
android:layout_below="@+id/Stand1list"
android:layout_alignParentRight="true"
android:layout_alignParentEnd="true" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceLarge"
android:text="8/10"
android:id="@+id/Score"
android:layout_marginLeft="33dp"
android:layout_marginStart="33dp"
android:layout_alignBottom="@+id/sendtodb"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:layout_marginBottom="10dp" />
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="horizontal" android:layout_width="match_parent"
android:layout_height="match_parent"
android:padding="20dp">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/textelement"
xmlns:android="http://schemas.android.com/apk/res/android"
android:textSize="30dp"
android:textStyle="bold"
android:longClickable="false" />
<CheckBox
android:layout_width="50dp"
android:layout_height="50dp"
android:id="@+id/Checkbox1"
android:button="@drawable/checkboxcustom"
android:layout_marginLeft="50dp" />
<CheckBox
android:button="@drawable/checkboxcustom"
android:id="@+id/Checkbox2"
android:layout_width="50dp"
android:layout_height="50dp"
android:layout_marginLeft="50dp" />
</LinearLayout>
行布局1.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent" android:layout_height="match_parent">
<ListView
android:layout_width="fill_parent"
android:layout_height="446dp"
android:id="@+id/Stand1list"
android:scrollIndicators="right"
android:smoothScrollbar="true">
</ListView>
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Send Score To Databse"
android:id="@+id/sendtodb"
android:textSize="12dp"
android:clickable="true"
android:layout_below="@+id/Stand1list"
android:layout_alignParentRight="true"
android:layout_alignParentEnd="true" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceLarge"
android:text="8/10"
android:id="@+id/Score"
android:layout_marginLeft="33dp"
android:layout_marginStart="33dp"
android:layout_alignBottom="@+id/sendtodb"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:layout_marginBottom="10dp" />
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="horizontal" android:layout_width="match_parent"
android:layout_height="match_parent"
android:padding="20dp">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/textelement"
xmlns:android="http://schemas.android.com/apk/res/android"
android:textSize="30dp"
android:textStyle="bold"
android:longClickable="false" />
<CheckBox
android:layout_width="50dp"
android:layout_height="50dp"
android:id="@+id/Checkbox1"
android:button="@drawable/checkboxcustom"
android:layout_marginLeft="50dp" />
<CheckBox
android:button="@drawable/checkboxcustom"
android:id="@+id/Checkbox2"
android:layout_width="50dp"
android:layout_height="50dp"
android:layout_marginLeft="50dp" />
</LinearLayout>
Stand1.java
public class Stand1 extends Fragment {
ListView mList;
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View root = inflater.inflate(R.layout.stand1,container,false);
mList = (ListView) root.findViewById(R.id.Stand1list);
return root;
}
public void onActivityCreated(Bundle savedInstanceState)
{
super.onActivityCreated(savedInstanceState);
populateListView();
}
private void populateListView() {
String[] pair = {"Pair 1","Pair 2","Pair 3","Pair 4","Pair 5"};
//build adapter
ArrayAdapter<String> adapter = new CustomArrayAdaptor(getActivity(),pair);
mList.setAdapter(adapter);
}
}
public class CustomArrayAdaptor extends ArrayAdapter<String>{
public CustomArrayAdaptor(Context context, String [] Pairs) {
super(context, R.layout.row_layout1, Pairs);
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
LayoutInflater inflater = LayoutInflater.from(getContext());
View CustomView = inflater.inflate(R.layout.row_layout1, parent, false);
String stringelement = getItem(position);
TextView Text= (TextView)CustomView.findViewById(R.id.textelement);
Text.setText(stringelement);
return CustomView;
}
}
公共类Stand1扩展了片段{
ListView-mList;
@可空
@凌驾
CreateView上的公共视图(布局、充气机、视图组容器、捆绑包保存状态){
视图根=充气机。充气(右侧布局。支架1,容器,错误);
mList=(ListView)root.findViewById(R.id.Stand1list);
返回根;
}
已创建ActivityState上的公共无效(Bundle savedInstanceState)
{
super.onActivityCreated(savedInstanceState);
populateListView();
}
私有void populateListView(){
字符串[]对={“对1”、“对2”、“对3”、“对4”、“对5”};
//构建适配器
ArrayAdapter=新的CustomArrayAdapter(getActivity(),pair);
mList.setAdapter(适配器);
}
}
CustomArrayAdaptor.java
public class Stand1 extends Fragment {
ListView mList;
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View root = inflater.inflate(R.layout.stand1,container,false);
mList = (ListView) root.findViewById(R.id.Stand1list);
return root;
}
public void onActivityCreated(Bundle savedInstanceState)
{
super.onActivityCreated(savedInstanceState);
populateListView();
}
private void populateListView() {
String[] pair = {"Pair 1","Pair 2","Pair 3","Pair 4","Pair 5"};
//build adapter
ArrayAdapter<String> adapter = new CustomArrayAdaptor(getActivity(),pair);
mList.setAdapter(adapter);
}
}
public class CustomArrayAdaptor extends ArrayAdapter<String>{
public CustomArrayAdaptor(Context context, String [] Pairs) {
super(context, R.layout.row_layout1, Pairs);
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
LayoutInflater inflater = LayoutInflater.from(getContext());
View CustomView = inflater.inflate(R.layout.row_layout1, parent, false);
String stringelement = getItem(position);
TextView Text= (TextView)CustomView.findViewById(R.id.textelement);
Text.setText(stringelement);
return CustomView;
}
}
公共类CustomArrayAdapter扩展了ArrayAdapter{
公共CustomArrayAdaptor(上下文,字符串[]对){
super(上下文,R.layout.row\u layout1,成对);
}
@凌驾
公共视图getView(int位置、视图转换视图、视图组父视图){
LayoutInflater充气器=LayoutInflater.from(getContext());
视图CustomView=充气机。充气(R.layout.row\u layout1,父级,false);
String stringelement=getItem(位置);
TextView Text=(TextView)CustomView.findViewById(R.id.textelement);
setText(stringelement);
返回自定义视图;
}
}
谢谢各位首先,您应该在适配器中回收视图:
LayoutInflater inflater = LayoutInflater.from(getContext());
if (convertView == null) {
convertView = inflater.inflate(R.layout.row_layout1, parent, false);
}
在此之后,我认为您应该在数据源中保存每个复选框的状态,或者只保留一个与配对数组大小相同的列表,并使用从getView获得的位置将其保存在那里。首先,您应该在适配器中循环视图:
LayoutInflater inflater = LayoutInflater.from(getContext());
if (convertView == null) {
convertView = inflater.inflate(R.layout.row_layout1, parent, false);
}
在此之后,我认为您应该在数据源中保存每个复选框的状态,或者只保留一个与配对数组大小相同的列表,并使用从getView获得的位置将其保存在那里。我向您的CustomArrayAdaptor添加了一些内容,并对其进行了测试,请参见下文:
public class CustomArrayAdapter extends ArrayAdapter<String> {
int checkAccumulator;
public CustomArrayAdapter(Context context, String [] Pairs) {
super(context, R.layout.row_layout1, Pairs);
checkAccumulator = 0;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
LayoutInflater inflater = LayoutInflater.from(getContext());
View customView = inflater.inflate(R.layout.row_layout1, parent, false);
String stringelement = getItem(position);
TextView Text = (TextView) customView.findViewById(R.id.textelement);
CheckBox checkBox1 = (CheckBox) customView.findViewById(R.id.Checkbox1);
CheckBox checkBox2 = (CheckBox) customView.findViewById(R.id.Checkbox2);
CompoundButton.OnCheckedChangeListener checkListener = new CompoundButton.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
countCheck(isChecked);
Log.i("MAIN", checkAccumulator + "");
}
};
checkBox1.setOnCheckedChangeListener(checkListener);
checkBox2.setOnCheckedChangeListener(checkListener);
Text.setText(stringelement);
return customView;
}
private void countCheck(boolean isChecked) {
checkAccumulator += isChecked ? 1 : -1 ;
}
}
公共类CustomArrayAdapter扩展了ArrayAdapter{
整数校验累加器;
公共CustomArrayAdapter(上下文,字符串[]对){
super(上下文,R.layout.row\u layout1,成对);
检查累加器=0;
}
@凌驾
公共视图getView(int位置、视图转换视图、视图组父视图){
LayoutInflater充气器=LayoutInflater.from(getContext());
视图customView=充气机。充气(R.layout.row\u layout1,父级,false);
String stringelement=getItem(位置);
TextView Text=(TextView)customView.findViewById(R.id.textelement);
复选框checkBox1=(复选框)customView.findviewbyd(R.id.checkBox1);
复选框checkBox2=(复选框)customView.findviewbyd(R.id.checkBox2);
CompoundButton.OnCheckedChangeListener checkListener=新建CompoundButton.OnCheckedChangeListener(){
@凌驾
检查更改后的公共无效(复合按钮视图,布尔值已检查){
计数检查(已检查);
Log.i(“MAIN”,checkacculator+”);
}
};
checkBox1.setOnCheckedChangeListener(checkListener);
checkBox2.setOnCheckedChangeListener(checkListener);
setText(stringelement);
返回自定义视图;
}
私有void countCheck(布尔值已检查){
检查累加器+=已检查?1:-1;
}
}
应该适合您。我在您的CustomArrayAdaptor中添加了一些东西,并对其进行了测试,请参见以下内容:
public class CustomArrayAdapter extends ArrayAdapter<String> {
int checkAccumulator;
public CustomArrayAdapter(Context context, String [] Pairs) {
super(context, R.layout.row_layout1, Pairs);
checkAccumulator = 0;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
LayoutInflater inflater = LayoutInflater.from(getContext());
View customView = inflater.inflate(R.layout.row_layout1, parent, false);
String stringelement = getItem(position);
TextView Text = (TextView) customView.findViewById(R.id.textelement);
CheckBox checkBox1 = (CheckBox) customView.findViewById(R.id.Checkbox1);
CheckBox checkBox2 = (CheckBox) customView.findViewById(R.id.Checkbox2);
CompoundButton.OnCheckedChangeListener checkListener = new CompoundButton.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
countCheck(isChecked);
Log.i("MAIN", checkAccumulator + "");
}
};
checkBox1.setOnCheckedChangeListener(checkListener);
checkBox2.setOnCheckedChangeListener(checkListener);
Text.setText(stringelement);
return customView;
}
private void countCheck(boolean isChecked) {
checkAccumulator += isChecked ? 1 : -1 ;
}
}
公共类CustomArrayAdapter扩展了ArrayAdapter{
整数校验累加器;
公共CustomArrayAdapter(上下文,字符串[]对){
super(上下文,R.layout.row\u layout1,成对);
检查累加器=0;
}
@凌驾
公共视图getView(int位置、视图转换视图、视图组父视图){
LayoutInflater充气器=LayoutInflater.from(getContext());
视图自定义视图=充气机。充气(右)