DailyDictionary Mars常用控件

1.spinner

Activity

public class MainActivity extends AppCompatActivity {

private Spinner spinner;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

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

ArrayAdapter adapter=ArrayAdapter.createFromResource(

this,R.array.arrar,android.R.layout.simple_spinner_item);

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

spinner.setAdapter(adapter);

spinner.setPrompt("Spinner");

spinner.setOnItemSelectedListener(new SpinnerOnSelectedListener());

}

class SpinnerOnSelectedListener implements AdapterView.OnItemSelectedListener{

@Override

public void onItemSelected(AdapterView adapterView, View view,int position,long id){

String selected=adapterView.getItemAtPosition(position).toString();

Log.d("1",selected);

}

@Override

public void onNothingSelected(AdapterViewadapterView){

System.out.println("nothingselected");

}

}