三十四、AndroidSpinner控件之键值对用法

package com.ljq.activity;

import java.io.Serializable;

&＃64;SuppressWarnings("serial")
public class Dict implements Serializable {
private Integer id;
private String text;

public Dict() {
}

public Dict(Integer id, String text) {
super();
this.id &＃61; id;
this.text &＃61; text;
}

public Integer getId() {
return id;
}

public void setId(Integer id) {
this.id &＃61; id;
}

public String getText() {
return text;
}

public void setText(String text) {
this.text &＃61; text;
}

/**
* 为什么要重写toString()呢&＃xff1f;
*
* 因为适配器在显示数据的时候&＃xff0c;如果传入适配器的对象不是字符串的情况下&＃xff0c;直接就使用对象.toString()
*/
&＃64;Override
public String toString() {
return text;
}

}

package com.ljq.activity;

import java.util.ArrayList;
import java.util.List;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Spinner;
import android.widget.Toast;
import android.widget.AdapterView.OnItemSelectedListener;

public class MainActivity extends Activity {
private Spinner mySpinner;

&＃64;Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);

mySpinner &＃61; (Spinner) findViewById(R.id.mySpinner);
List dicts &＃61; new ArrayList();
dicts.add(new Dict(1, "测试1"));
dicts.add(new Dict(2, "测试2"));
dicts.add(new Dict(3, "测试3"));
dicts.add(new Dict(4, "测试4"));
ArrayAdapter adapter &＃61; new ArrayAdapter(this,
android.R.layout.simple_spinner_item, dicts);
mySpinner.setAdapter(adapter);
mySpinner.setOnItemSelectedListener(new OnItemSelectedListener(){
public void onItemSelected(AdapterView parent, View view,
int position, long id) {
// 获取键的方法&＃xff1a;mySpinner.getSelectedItem().toString()或((Dict)mySpinner.getSelectedItem()).getId()
// 获取值的方法&＃xff1a;((Dict)mySpinner.getSelectedItem()).getText();
Toast.makeText(MainActivity.this,
"键:" &＃43; mySpinner.getSelectedItem().toString() &＃43; "、" &＃43; ((Dict) mySpinner.getSelectedItem()).getId() &＃43;
"&＃xff0c;值:" &＃43; ((Dict) mySpinner.getSelectedItem()).getText(),
Toast.LENGTH_LONG).show();
}

public void onNothingSelected(AdapterView parent) {

}
});
}
}

android:orientation&＃61;"vertical"
android:layout_width&＃61;"fill_parent"
android:layout_height&＃61;"fill_parent">
android:layout_height&＃61;"wrap_content"
android:id&＃61;"&＃64;&＃43;id/mySpinner"/>