Question

lstv = (ListView) findViewById(R.id.lista);
lstv.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent, View view, int posicion, long id) {
                removeItemFromList(posicion);
            }
        });
    }


    protected void removeItemFromList(final int position) {
        final int deletePosition = position;
        AlertDialog.Builder alert = new AlertDialog.Builder(
                Apple.this);
        alert.setTitle("Delete");
        alert.setMessage("¿Do you want delete?");
        alert.setPositiveButton("Si", new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialog, int which) {
Help here please...!!
            }
        });


        alert.setNegativeButton("No", new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialog, int which) {
                // TODO Auto-generated method stub
                dialog.dismiss();
            }
        });
        alert.show();

Answer 1

参考this

修改arrayList

然后

arrayList.remove([INDEX]);
arrayAdapter.notifyDataSetChanged();

现在，如果需要，请再次将adapter设置为ListView

Answer 2

你需要将item的arraylist传递给函数，删除后需要运行函数notifyDataSetChanged();这个函数重新构建listview。这样：

AlertDialog.Builder alertDialog = new AlertDialog.Builder(AlertDialogActivity.this);

    alertDialog.setTitle("title...");
    alertDialog.setMessage("Are you sure you want delete this?");
    alertDialog.setIcon(R.drawable.delete);

    alertDialog.setPositiveButton("YES", new DialogInterface.OnClickListener() {
        public void onClick(DialogInterface dialog,int which) {
                  mArrayList.remove(position);
                  mArrayAdapter.notifyDataSetChanged();


        Toast.makeText(getApplicationContext(), "You clicked on YES", Toast.LENGTH_SHORT).show();
        }
    });


    alertDialog.setNegativeButton("NO", new DialogInterface.OnClickListener() {
        public void onClick(DialogInterface dialog, int which) {

        Toast.makeText(getApplicationContext(), "You clicked on NO", Toast.LENGTH_SHORT).show();
        dialog.cancel();
        }
    });

    // Showing Alert Message
    alertDialog.show();

Answer 3

在Alert.Dialog方法中添加此代码

alert.setPositiveButton("Si", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {

                        itemList.remove(favTransPosition);
                        adapter.notifyDataSetChanged();                         

                        adapter = new ArrayAdapter<String>(, , , itemList); // Fill remaining params as you have created earlier
                        lstv.setAdapter(adapter);                       
                    }
                });

使用对话框android从listview中删除项目

3 个答案: