微调菜单 - Android

Question

I would like to add multiple spinner bar menu in my app in android. I am a beginner in it and i created only one spinner bar. When i create the next one it doesn't work well. tried to add next spinner here but when I did it, it displays value from the second table in the first spinner. It should be first spinner -1st table etc. Thanks in advance for help.

public class SecondPan extends AppCompatActivity implements AdapterView.OnItemSelectedListener {
    private Spinner sspnOption6,sspn2;
    private TextView ttxOption6,ttx;
    @Override
    protected void onCreate(Bundle savedInstanceState) {


        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_second_pan);
        Spinner spinner = findViewById(R.id.sspn);
        ArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromResource(this,R.array.tab1, android.R.layout.simple_spinner_item);
        adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
        spinner.setAdapter(adapter);
        spinner.setOnItemSelectedListener(this);



    }

    @Override
    public void onItemSelected(AdapterView<?> parent, View view, int position, long l) {
        String text = parent.getItemAtPosition(position).toString();
        Toast.makeText(parent.getContext(),text, Toast.LENGTH_SHORT).show();
    }

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

    }
}

Answer 1

You have declared two Spinners sspnOption6 and sspn2 , but you never used them. Also you have got the reference for only one spinner which id is sspn .

So now get reference to another id also create different ArrayAdapters for them, this way you will not get value of first spinner in second one for selected position.

Make theses changes.

You have already declared two spinners before onCreate():

private Spinner sspnOption6Spinner;
private Spinner sspn2Spinner;

Get reference of those views, you have earlier got only one.

// Check your id's from layout.
sspnOption6Spinner = findViewById(R.id.sspn_options6);
sspn2Spinner = findViewById(R.id.sspn);

Set ArrayAdapters

ArrayAdapter<CharSequence> firstSpinnerAdapter = ArrayAdapter.createFromResource(this,R.array.tab1, android.R.layout.simple_spinner_item);
firstSpinnerAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
sspnOption6Spinner.setAdapter(adapter);

ArrayAdapter<CharSequence> secondSpinnerAdapter = ArrayAdapter.createFromResource(this,R.array.tab2, android.R.layout.simple_spinner_item);
secondSpinnerAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
sspn2Spinner.setAdapter(adapter);

Now set listeners, both should have their own:

        sspnOption6Spinner.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
                String text = parent.getItemAtPosition(position).toString();
                Toast.makeText(parent.getContext(),text, Toast.LENGTH_SHORT).show();
            }
        });

        sspn2Spinner.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
                String text = parent.getItemAtPosition(position).toString();
                Toast.makeText(parent.getContext(),text, Toast.LENGTH_SHORT).show();
            }
        });

If you want you can set onNothingSelected()

Also read the documentation , it has all details.

Answer 2

I would like to add multiple spinner bar menu in my app in android. I am a beginner in it and i created only one spinner bar. When i create the next one it doesn't work well. tried to add next spinner here but when I did it, it displays value from the second table in the first spinner. It should be first spinner -1st table etc. Thanks in advance for help.

public class SecondPan extends AppCompatActivity implements AdapterView.OnItemSelectedListener {
    private Spinner sspnOption6,sspn2;
    private TextView ttxOption6,ttx;
    @Override
    protected void onCreate(Bundle savedInstanceState) {


        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_second_pan);
        Spinner spinner = findViewById(R.id.sspn);
        ArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromResource(this,R.array.tab1, android.R.layout.simple_spinner_item);
        adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
        spinner.setAdapter(adapter);
        spinner.setOnItemSelectedListener(this);



    }

    @Override
    public void onItemSelected(AdapterView<?> parent, View view, int position, long l) {
        String text = parent.getItemAtPosition(position).toString();
        Toast.makeText(parent.getContext(),text, Toast.LENGTH_SHORT).show();
    }

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

    }
}