在Android中使用列表视图外部的删除按钮删除列表视图中的项目
我正在使用一个自定义列表视图,它有一个在Android中使用列表视图外部的删除按钮删除列表视图中的项目,android,listview,android-cursoradapter,Android,Listview,Android Cursoradapter,我正在使用一个自定义列表视图,它有一个复选框和按钮,并使用游标适配器填充列表视图 现在,当我单击按钮delete时,我想删除列表视图中的项目。因此,我先使用button click listener,然后在listview中捕获项目click,我为listview编写了itemclicklistener,然后尝试捕获,但这里没有任何功能,因为当在listview中单击项目时,控件将不会进入itemclicklistener 代码: 公共类管理器扩展活动{ 字符串getentry; 私有int s
复选框
和按钮
,并使用游标适配器填充列表视图
现在,当我单击按钮delete
时,我想删除列表视图中的项目。因此,我先使用button click listener,然后在listview中捕获项目click,我为listview编写了itemclicklistener,然后尝试捕获,但这里没有任何功能,因为当在listview中单击项目时,控件将不会进入itemclicklistener
代码:
公共类管理器扩展活动{
字符串getentry;
私有int storeID=0;
//数据库d;
斯托克表街;
私人股票;
公共光标a1;
意向bd;
意向sd;
//ListView流行股票;
/*公共股票经理(){
//TODO自动生成的构造函数存根
}*/
静态类视窗夹{
复选框cb;
按钮视图1;
}
创建时受保护的void(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.stockmanager);
//d=新数据库(getApplicationContext());
st=新股票表(getApplicationContext());
最终按钮AddStock=(按钮)findViewById(R.id.button1);
最终按钮DeleteStock=(按钮)findViewById(R.id.button3);
最终EditText条目=(EditText)findViewById(R.id.editText1);
最终按钮详细信息=(按钮)findViewById(R.id.button2);
//最终ListView popstocks=(ListView)findViewById(R.id.listView1);
最终ListView popstocks=(ListView)findViewById(R.id.listView1);
最终文本视图显示股票=(文本视图)findViewById(R.id.textView2);
********用于删除listview中的项的按钮**************************
setOnClickListener(新的OnClickListener(){
@凌驾
公共void onClick(视图v){
//TODO自动生成的方法存根
setOnItemClickListener(新的OnItemClickListener(){
@凌驾
公共链接(AdapterView arg0、视图arg1、,
整数arg2,长arg3){
//TODO自动生成的方法存根
//Toast.makeText(getApplicationContext(),popstocks.getCheckedItemCount(),Toast.LENGTH_LONG).show();
System.out.println(popstocks.getCheckedItemCount());
}
});
System.out.println(popstocks.isItemChecked(popstocks.getCheckedItemPosition());
}
});
}
公共类poplist扩展了CursorAdapter{
公共poplist(上下文,游标c){
超级(上下文,c);
//TODO自动生成的构造函数存根
}
//StockTable st1=新的StockTable(getApplicationContext());
//数据库d1=新数据库(getApplicationContext());
@凌驾
public void bindView(视图、上下文、光标c){
//TODO自动生成的方法存根
最终视图持有者myviewholder=新视图持有者();
myviewholder.cb=(复选框)view.findviewbyd(R.id.checkBox1);
myviewholder.view1=(按钮)view.findViewById(R.id.button1);
//if(c.moveToFirst()){
//cb.setText(a1.getString(a1.getColumnIndex(st1.column2));
//做{
//cb.setText(a1.getString(a1.getColumnIndexOrThrow(st.column2));
myviewholder.cb.setText(c.getString(c.getColumnIndexOrThrow(st.column3));
//}while(a1.moveToNext());
// }
myviewholder.view1.setOnClickListener(新的OnClickListener(){
@凌驾
公共void onClick(视图v){
//TODO自动生成的方法存根
sd=新意图(v.getContext(),StockDetail.class);
sd.putExtra(“StockName”,myviewholder.cb.getText());
星触觉;
}
});
}
@凌驾
公共视图newView(上下文上下文、光标c、视图组父对象){
//TODO自动生成的方法存根
LayoutFlater充气机=LayoutFlater.from(上下文);
视图v=充气机。充气(R.layout.stocklist,父项,false);
bindView(v,context,c);
返回v;
//返回null;
}
}
}
我如何解决这个问题?如果我走错了方向,我很乐意接受任何指导。我是Android的初学者
编辑
创建时受保护的void(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.stockmanager);
//d=新数据库(getApplicationContext());
st=新股票表(getApplicationContext());
最终按钮AddStock=(按钮)findViewById(R.id.button1);
最终按钮DeleteStock=(按钮)findViewById(R.id.button3);
最终EditText条目=(EditText)findViewById(R.id.editText1);
最终按钮详细信息=(按钮)findViewById(R.id.button2);
//最终ListView popstocks=(ListView)findViewById(R.id.listView1);
最终ListView popstocks=(ListView)findViewById(R.id.listView1);
最终文本视图显示股票=(文本视图)findViewById(R.id.textView2);
displaystocks.setText(“您还没有添加任何股票,首先输入股票名称,然后单击添加股票按钮”);
getstocks=“选择”+st.column1+”作为_id,“+st.column3+”从“+st.tablename”;
a1=Da
public class manager extends Activity{
String getentry;
private int storeID=0;
//Database d;
StockTable st;
private String getstocks;
public Cursor a1;
Intent bd;
Intent sd;
//ListView popstocks;
/*public stockmanager() {
// TODO Auto-generated constructor stub
}*/
static class ViewHolder {
CheckBox cb;
Button view1;
}
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.stockmanager);
// d=new Database(getApplicationContext());
st=new StockTable(getApplicationContext());
final Button AddStock=(Button) findViewById(R.id.button1);
final Button DeleteStock=(Button) findViewById(R.id.button3);
final EditText entry=(EditText) findViewById(R.id.editText1);
final Button BroDetail=(Button) findViewById(R.id.button2);
//final ListView popstocks=(ListView) findViewById(R.id.listView1);
final ListView popstocks =(ListView) findViewById(R.id.listView1);
final TextView displaystocks=(TextView) findViewById(R.id.textView2);
********button that is used for deleting the item in listview**************************
DeleteStock.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
popstocks.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> arg0, View arg1,
int arg2, long arg3) {
// TODO Auto-generated method stub
//Toast.makeText(getApplicationContext(), popstocks.getCheckedItemCount(), Toast.LENGTH_LONG).show();
System.out.println(popstocks.getCheckedItemCount());
}
});
System.out.println(popstocks.isItemChecked(popstocks.getCheckedItemPosition()));
}
});
}
public class poplist extends CursorAdapter{
public poplist(Context context, Cursor c) {
super(context, c);
// TODO Auto-generated constructor stub
}
//StockTable st1=new StockTable(getApplicationContext());
//Database d1=new Database(getApplicationContext());
@Override
public void bindView(View view, Context context, Cursor c) {
// TODO Auto-generated method stub
final ViewHolder myviewholder=new ViewHolder();
myviewholder.cb=(CheckBox) view.findViewById(R.id.checkBox1);
myviewholder.view1=(Button) view.findViewById(R.id.button1);
//if(c.moveToFirst()){
//cb.setText(a1.getString(a1.getColumnIndex(st1.column2)));
//do{
//cb.setText(a1.getString(a1.getColumnIndexOrThrow(st.column2)));
myviewholder.cb.setText(c.getString(c.getColumnIndexOrThrow(st.column3)));
// }while (a1.moveToNext());
// }
myviewholder.view1.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
sd=new Intent(v.getContext(),StockDetail.class);
sd.putExtra("StockName", myviewholder.cb.getText());
startActivity(sd);
}
});
}
@Override
public View newView(Context context, Cursor c, ViewGroup parent) {
// TODO Auto-generated method stub
LayoutInflater inflater = LayoutInflater.from(context);
View v = inflater.inflate(R.layout.stocklist, parent, false);
bindView(v, context, c);
return v;
// return null;
}
}
}
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.stockmanager);
// d=new Database(getApplicationContext());
st=new StockTable(getApplicationContext());
final Button AddStock=(Button) findViewById(R.id.button1);
final Button DeleteStock=(Button) findViewById(R.id.button3);
final EditText entry=(EditText) findViewById(R.id.editText1);
final Button BroDetail=(Button) findViewById(R.id.button2);
//final ListView popstocks=(ListView) findViewById(R.id.listView1);
final ListView popstocks =(ListView) findViewById(R.id.listView1);
final TextView displaystocks=(TextView) findViewById(R.id.textView2);
displaystocks.setText("You have not added any stocks start by entering stock name and clicking ADD Stock button");
getstocks="Select " + st.column1 + " as _id, " + st.column3 + " From "+ st.tablename;
a1=Database.getInstance(getApplicationContext()).getWritableDatabase().rawQuery(getstocks, null);
if(a1.moveToNext())
{
displaystocks.setVisibility(View.INVISIBLE);
}
poplist populatestocks=new poplist(getApplicationContext(),a1) ;
popstocks.setAdapter(populatestocks);
popstocks.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
long arg3) {
System.out.println("Item Clicked");
System.out.println(popstocks.getCheckedItemPosition());
}
});
@Override
public void bindView(View view, Context context, Cursor c) {
// TODO Auto-generated method stub
final ViewHolder myviewholder=new ViewHolder();
myviewholder.cb=(CheckBox) view.findViewById(R.id.checkBox1);
myviewholder.view1=(Button) view.findViewById(R.id.button1);
//if(c.moveToFirst()){
//cb.setText(a1.getString(a1.getColumnIndex(st1.column2)));
//do{
//cb.setText(a1.getString(a1.getColumnIndexOrThrow(st.column2)));
myviewholder.cb.setText(c.getString(c.getColumnIndexOrThrow(st.column3)));
// }while (a1.moveToNext());
// }
myviewholder.cb.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// CheckBox Clicked
}
});
myviewholder.view1.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
sd=new Intent(v.getContext(),StockDetail.class);
sd.putExtra("StockName", myviewholder.cb.getText());
startActivity(sd);
}
});
}