如何在 Android 中创建多选微调器

Question

我使用下面的代码来创建一个简单的 Spinner（只允许单选）

但是现在我想知道如何使用微调器进行多项选择，我知道我可以使用 Dialog 实现这一点，但我必须使用微调器..

public class MainActivity extends Activity {

    Spinner spnr;

    String[] celebrities = {
            "Chris Hemsworth",
            "Jennifer Lawrence",
            "Jessica Alba",
            "Brad Pitt",
            "Tom Cruise",
            "Johnny Depp",
            "Megan Fox",
            "Paul Walker",
            "Vin Diesel"
    };

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        spnr = (Spinner)findViewById(R.id.spinner);
        ArrayAdapter<String> adapter = new ArrayAdapter<String>(
                this, android.R.layout.simple_spinner_item, celebrities);

        spnr.setAdapter(adapter);
        spnr.setOnItemSelectedListener(
                new AdapterView.OnItemSelectedListener() {

                    @Override
                    public void onItemSelected(AdapterView<?> arg0, View arg1,
                            int arg2, long arg3) {

                        int position = spnr.getSelectedItemPosition();
                        Toast.makeText(getApplicationContext(),"You have selected "+celebrities[+position],Toast.LENGTH_LONG).show();
                        // TODO Auto-generated method stub
                    }

                    @Override
                    public void onNothingSelected(AdapterView<?> arg0) {
                        // TODO Auto-generated method stub

                    }

                }
            );
    }

}

Answer 1

默认情况下 Spinner 不能用于多项选择。

如果你需要它，你必须扩展它，检查这里

带有多项选择的 Android Spinner