Android下拉框

Activity_main.xml

MainActivity.java

package?pw.gutao.android_08_0628;

import?android.support.v7.app.AppCompatActivity;
import?android.os.Bundle;
import?android.view.View;
import?android.widget.AdapterView;
import?android.widget.ArrayAdapter;
import?android.widget.AutoCompleteTextView;
import?android.widget.MultiAutoCompleteTextView;
import?android.widget.Spinner;
import?android.widget.Toast;

public?class?MainActivity?extends?AppCompatActivity?{

????private?AutoCompleteTextView?autoCompleteTextView;
????private?MultiAutoCompleteTextView?multiAutoCompleteTextView;
????private?Spinner?spinner;

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

??????????????//獲取下拉列表
????????spinner?=?(Spinner)?findViewById(R.id.s_main_1);


????????//定義數(shù)組，保存省份
????????final?String[]?provinces?=?{"湖南","湖北","河南","河北","山東","山西"};
????????//創(chuàng)建適配器
????????ArrayAdapter?adapters?=?new?ArrayAdapter(this,android.R.layout.simple_list_item_1,provinces);
????????//設(shè)置適配器
????????spinner.setAdapter(adapters);
????????//獲取當(dāng)前選中的選項
????????spinner.setOnItemSelectedListener(new?AdapterView.OnItemSelectedListener()?{
????????????@Override
????????????public?void?onItemSelected(AdapterView?parent,?View?view,?int?position,?long?id)?{
????????????????Toast.makeText(MainActivity.this,provinces[position]+"省",Toast.LENGTH_SHORT).show();
????????????}

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

????????????}
????????});
????}
}