充分利用Android的列表视图所有选中的项目 [英] Getting all checked items from listview Android
问题描述
我是机器人编程noobie,我使用Android的工作室,我有包含两个textviews和复选框列表视图项。
我试图创建一个复选框,以便listiview当一个特定的按钮点击我会得到一个列表中选中的项目的名称。
试图寻找教程和其他有用的东西,但只是无法得到它的权利。
谢谢大家 :)
这是我为ListView自定义适配器:
公共类postadapter扩展ArrayAdapter<邮电GT; {
ArrayList的<邮电GT;名单=新的ArrayList<信息>();
上下文语境;
INT layoutResourceId;
发布数据[] = NULL;公共postadapter(上下文的背景下,诠释layoutResourceId,ArrayList的<信息>名单){
超(背景下,layoutResourceId,清单);
this.layoutResourceId = layoutResourceId;
this.context =背景;
this.list =清单;
}@覆盖
公共查看getView(INT位置,查看convertView,父母的ViewGroup){
查看排= convertView;
ViewHolder支架=无效; 如果(行== NULL){
LayoutInflater充气=((活动)上下文).getLayoutInflater();
行= inflater.inflate(layoutResourceId,父母,假); 持有人=新ViewHolder();
holder.txtTitle =(TextView中)row.findViewById(R.id.textView1);
holder.txtdescription =(TextView中)row.findViewById(R.id.textView2);
holder.chk =(复选框)row.findViewById(R.id.chkbox); row.setTag(保持器);
holder.chk.setOnClickListener(新View.OnClickListener(){
公共无效的onClick(视图v){
复选框CB =(复选框)V;
后POST1 =(后)cb.getTag(); post1.setSelected(cb.isChecked());
}
});
}
其他
{
支架=(ViewHolder)row.getTag();
} 发布POST1 = list.get(位置);
holder.txtTitle.setText(post1.getPostname());
holder.txtdescription.setText(מספרשומרים:+ post1.getnumberguards()+משעה:+ post1.getstime()+עדשעה:+ post1.getetime());
holder.chk.setChecked(post1.isSelected());
返回行;
}静态类ViewHolder
{ TextView的txtTitle;
TextView的txtdescription;
复选框CHK;}
}
您可以保持所有选择复选框 - 一个布尔数组
- 声明布尔数组在适配器 -
布尔[] checkBoxState
- 初始化它在你的适配器的构造 -
checkBoxState =新的布尔[则为list.size()]
-
然后在你的getView方法使用这个数组 -
holder.checkBox.setOnClickListener(新View.OnClickListener(){
公共无效的onClick(视图v)
{
如果(((复选框)V).isChecked())
{
checkBoxState [位置] =真;
}
其他
{
checkBoxState [位置] = FALSE; }
}
}); -
从这个数组中的位置(这里适配器是您的自定义接口的对象) -
有关(INT K = 0; K<
adapter.checkBoxState.length; k ++)
{如果(adapter.checkBoxState [K] ==真)
{
}`
I am a noobie at android programming , I am using Android studio and I have a listview item containing two textviews and a checkbox. I am trying to create a listiview with checkboxes so when a click on a specific button I will get a list the names of the checked items . Tried looking for tutorials and other helpful things but just can't get it right. Thank You everyone :) This is my custom adapter for the listview:
public class postadapter extends ArrayAdapter<post> {
ArrayList<post> list = new ArrayList<post>();
Context context;
int layoutResourceId;
post data[] = null;
public postadapter(Context context, int layoutResourceId, ArrayList<post> list) {
super(context, layoutResourceId, list);
this.layoutResourceId = layoutResourceId;
this.context = context;
this.list = list;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
View row = convertView;
ViewHolder holder = null;
if(row == null) {
LayoutInflater inflater = ((Activity) context).getLayoutInflater();
row = inflater.inflate(layoutResourceId, parent, false);
holder = new ViewHolder();
holder.txtTitle = (TextView) row.findViewById(R.id.textView1);
holder.txtdescription = (TextView) row.findViewById(R.id.textView2);
holder.chk = (CheckBox) row.findViewById(R.id.chkbox);
row.setTag(holder);
holder.chk.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
CheckBox cb = (CheckBox) v;
post post1 = (post) cb.getTag();
post1.setSelected(cb.isChecked());
}
});
}
else
{
holder = (ViewHolder)row.getTag();
}
post post1 = list.get(position);
holder.txtTitle.setText(post1.getPostname());
holder.txtdescription.setText("מספר שומרים:"+post1.getnumberguards()+" משעה: "+post1.getstime()+" עד שעה: "+post1.getetime());
holder.chk.setChecked(post1.isSelected());
return row;
}
static class ViewHolder
{
TextView txtTitle;
TextView txtdescription;
CheckBox chk;
}
}
You can maintain a boolean array of all the selected checkbox-
- Declare Boolean array in your adapter -
boolean[] checkBoxState
- Initialize it in your adapter's constructor -
checkBoxState= new boolean[list.size()]
Then use this array in your getView method -
holder.checkBox.setOnClickListener(new View.OnClickListener() { public void onClick(View v) { if(((CheckBox)v).isChecked()) { checkBoxState[position]=true; } else { checkBoxState[position]=false; } } });
Retrieve the position from this array (Here adapter is the object of your custom adapter) -
for(int k=0;k< adapter.checkBoxState.length ;k++) {
if(adapter.checkBoxState[k]==true) { }`
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