如何在Android的Spinner中加载数据？

Question

I tried to load data into my spinner. But it doesn't works well. I don't know the reason for that. I have tried using only diamond operator (<>) and other methods in Stack Overflow.

Spinner spinner = (Spinner) findViewById(R.id.spinner3);

            spinner.setOnItemSelectedListener((AdapterView.OnItemSelectedListener) this);
                    List<String> view = new ArrayList<String>();
            view.add("Grid view");
            view.add("chart view");



            ArrayAdapter<String> dataAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item,View);


            dataAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);


            spinner.setAdapter(dataAdapter);

Answer 1

更改此代码

 ArrayAdapter<String> dataAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item,view);//insted of View use view

Answer 2

使用view代替View

  ArrayAdapter<String> dataAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item,view);

Answer 3

Another workable example of your code

Spinner spinner = (Spinner) findViewById(R.id.spinner);
spinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
    @Override
    public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {

    }

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

    }
});
spinner.setAdapter(new ArrayAdapter<>(this, android.R.layout.simple_spinner_dropdown_item,
        Arrays.asList("Grid View", "chart view")));

Answer 4

spinner=(Spinner)findViewById(R.id.spinner);

ArrayAdapter<String> dataAdapter = new ArrayAdapter<String>(this, R.layout.spinner_items,yourArrayList);
spinner.setAdapter(dataAdapter);
spinner.setOnItemSelectedListener(this);

@Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
    switch (parent.getId()){
        case R.id.spinner:
            String str_type=parent.getItemAtPosition(position).toString();
            TypeSelected = position;
            break;
    }
}

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

Answer 5

try

String[] data= {"Grid view","chart view"};
Spinner spinner = (Spinner) findViewById(R.id.spinner3);
ArrayAdapter<String> adapter = new ArrayAdapter<String>(getActivity(),android.R.layout.simple_spinner_item,data);

spinner .setAdapter(adapter);
adapter.notifyDataSetChanged();

then you could get selected items position on

spinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
            @Override
            public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {    }