Question

我在这里尝试从下拉微调器中显示所选值，但我的setOnItemSelectedListener无法正常工作

我的代码如下： -

ArrayAdapter<String> adapter =new ArrayAdapter<String>(this, R.array.location,list);

                spinner.setAdapter(adapter);
                spinner.setOnItemSelectedListener(new OnItemSelectedListener() {
                    public void onItemSelected(AdapterView<?> parent, View view,
                            int pos, long id) {
                        Toast.makeText(
                                parent.getContext(),
                                "The color is "
                                        + parent.getItemAtPosition(pos).toString(),
                                Toast.LENGTH_LONG).show();
                    }

                    public void onNothingSelected(AdapterView<?> parent) {
                    }
                });

Answer 1

 ArrayAdapter<CharSequence> adapter=ArrayAdapter.createFromResource(this,R.array.location,android.R.layout.simple_spinner_item);
            adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
            spinner.setAdapter(adapter);

    spinner.setOnItemSelectedListener(new OnItemSelectedListener() {
                        public void onItemSelected(AdapterView<?> parent, View view,
                                int pos, long id) {
                            Toast.makeText(
                                    parent.getContext(),
                                    "The color is "
                                            + spinner.getSelectedItem().toString(),
                                    Toast.LENGTH_LONG).show();
                        }

                        public void onNothingSelected(AdapterView<?> parent) {
                        }
                    });

进行必要的更改并尝试上述代码。如果不起作用，请将Charsequence更改为String。

Answer 2

试试这段代码

spin.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
            @Override
            public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
                Employee employee = employees.get(position);
            }

            @Override
            public void onNothingSelected(AdapterView<?> parent) {

            }
});

单击项目时无法获取Spinner值

2 个答案: