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如何使用OnitemLongClick删除ListView中的项目?

onlongclicklistener alertdialog android-listview android

no_profile · 技术社区 · 7 年前

我已经创建了一个 onitemLongClick which will display the following alertDialog when listView is long clicked.我的代码的问题是,即使我从列表中选择了“编辑”作为选项,该项仍将被删除。

我想在单击“编辑”时表达一个意图,在单击“删除”时删除该项,但我不知道如何创建条件语句来执行该操作。

这是我的代码:

MaultActudio.Java

<--start of snippet-->

@覆盖
公共布尔型OnitemLongClick(adapterView<?>视图,最终内部位置,长ID){
persons selectedPersons=this.list.get(职位);
string name=selectedPersons.getname();

final charsequence[]选项=“编辑”,“删除”

builder.items(选项,新对话框interference.onclickListener()。{

@覆盖
public void onclick(dialoginterface dialog,int which){
列出。删除(位置);
adapter.notifyDataSetChanged();
toast.maketext(mainactivity.this,“项目已删除!”,toast.length_long.show();

}
(});
alertDialog dialog=builder.create();
dialog.show();

返回真值;

}

<--代码段结尾-->


我想在单击“编辑”时表达一个意图,在单击“删除”时删除该项,但我对如何创建条件语句没有任何线索。



这是我的代码:

mainactivity.java(主活动.java)

<-- start of snippet -->

@Override
public boolean onItemLongClick(AdapterView<?> View view, final int position, long id){
   Persons selectedPersons = this.list.get(position);
   String name = selectedPersons.getName();

   final CharSequence[] options = {"Edit", "Delete"};

   builder.Items(options, new DialogInterference.OnClickListener(){

      @Override
      public void onClick(DialogInterface dialog, int which){
          list.remove(position);
          adapter.notifyDataSetChanged();
          Toast.makeText(MainActivity.this, "Item deleted!", Toast.LENGTH_LONG).show();

}
});
AlertDialog dialog = builder.create();
dialog.show();

return true;

}

<-- end of snippet -->

2 回复 | 直到 7 年前

shb 7 年前

把一个if条件放在你的onclick中,就像这样-

@Override
 public boolean onItemLongClick(AdapterView<?> View view, f final int position, long id){
    Persons selectedPersons = this.list.get(position);
    String name = selectedPersons.getName();

    final CharSequence[] options = {"Edit", "Delete"};

   builder.Items(options, new DialogInterference.OnClickListener(){

      @Override
      public void onClick(DialogInterface dialog, int which){
          if(options[which].equals("Delete") {
              list.remove(position);
              adapter.notifyDataSetChanged();
              Toast.makeText(MainActivity.this, "Item deleted!", Toast.LENGTH_LONG).show();
           } else if(options[which].equals("Edit") {
                 //Do edit
           }

      }
});

SaadAAkash 7 年前

自从你提到 wanted to put an intent when I click "Edit" and delete the item when I click Delete ,我认为你可以通过使用 which 从您的 DialogInterference.OnClickListener() 这样地:

@Override
public boolean onItemLongClick(AdapterView<?> View view, final int position, long id){
   Persons selectedPersons = this.list.get(position);
   String name = selectedPersons.getName();
   final CharSequence[] options = {"Edit", "Delete"};
   builder.Items(options, new DialogInterference.OnClickListener(){
      @Override
      public void onClick(DialogInterface dialog, int which){
          if (which == 0) { //put the edit codes like call an intent
            Intent i = new Intent(getApplicationContext(), ActivityEdit.class);  
            startActivity(i); 
          } else {
             list.remove(position);
             adapter.notifyDataSetChanged();
             Toast.makeText(MainActivity.this, "Item deleted!", Toast.LENGTH_LONG).show();
          }
      }
   });
   AlertDialog dialog = builder.create();
   dialog.show();
   return true;
}

Rajan Girsa 7 年前

添加列表的AlertDialog OnitemLongClick()事件。像这样的事情:

new AlertDialog.Builder(this)
    .setTitle("Are you sure?")
    .setMessage("Do you want to delete this MemberClass?")
    .setIcon(android.R.drawable.ic_dialog_alert)
    .setPositiveButton("Yes", new DialogInterface.OnClickListener() {
        public void onClick(DialogInterface dialog, int whichButton) {
        list.remove(position);
        Toast.makeText(DeleteMember.this, "Deleted Member", Toast.LENGTH_SHORT).show(); 
    }})
    .setNegativeButton(android.R.string.no, null).show();
}