import android.widget.Button;import android.widget.Toast; public class SingleChoiceItemsTest extends Activity implements OnClickListener{ private String[] province = new String[] { "上海", "北京", "湖南", "湖北", "海南" }; private Button btnSingleChoiceList; // 單擊事件對象的執行個體 private ButtonOnClick buttonOnClick = new ButtonOnClick(1); /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); btnSingleChoiceList = (Button) findViewById(R.id.btnSingleChoice); btnSingleChoiceList.setOnClickListener(this); } @Override public void onClick(View v) { showSingleChoiceButton(); } // 在單選選項中顯示 確定和取消按鈕 //buttonOnClickg變數的資料類型是ButtonOnClick,一個單擊事件類別 private void showSingleChoiceButton() { AlertDialog.Builder builder = new AlertDialog.Builder(this); builder.setTitle("請選擇省份"); builder.setSingleChoiceItems(province, 0, buttonOnClick); builder.setPositiveButton("確定", buttonOnClick); builder.setNegativeButton("取消", buttonOnClick); builder.show(); } private class ButtonOnClick implements DialogInterface.OnClickListener { private int index; // 表示選項的索引 public ButtonOnClick(int index) { this.index = index; } @Override public void onClick(DialogInterface dialog, int which) { // which表示單擊的按鈕索引,所有的選項索引都是大於0,按鈕索引都是小於0的。 if (which >= 0) { //如果單擊的是清單項目,將當前清單項目的索引儲存在index中。 //如果想單擊清單項目後關閉對話方塊,可在此處調用dialog.cancel() //或是用dialog.dismiss()方法。 index = which; } else { //使用者單擊的是【確定】按鈕 if (which == DialogInterface.BUTTON_POSITIVE) { //顯示使用者選擇的是第幾個清單項目。 final AlertDialog ad = new AlertDialog.Builder( SingleChoiceItemsTest.this).setMessage( "你選擇的地區是:" + index + ":" + province[index]).show(); //五秒鐘後自動關閉。 Handler hander = new Handler(); Runnable runnable = new Runnable() { @Override public void run() { ad.dismiss(); } }; hander.postDelayed(runnable, 5 * 1000); } //使用者單擊的是【取消】按鈕 else if (which == DialogInterface.BUTTON_NEGATIVE) { Toast.makeText(SingleChoiceItemsTest.this, "你沒有選擇任何東西", Toast.LENGTH_LONG); } } } }}
通過AlertDialog.Builder類的setSingleChoiceItems方法可以建立帶單按鈕的列表:方法如下:1、從資源檔中裝載資料:public Builder setSingleChoiceItems(int itemsId, int checkedItem, final OnClickListener listener)2、從資料集中裝載資料public Builder setSingleChoiceItems(Cursor cursor, int checkedItem, String
labelColumn, final OnClickListener listener)3、從字串數組中裝載資料public Builder setSingleChoiceItems(CharSequence[] items, int checkedItem, final OnClickListener listener)4、從ListAdapter對象中裝載資料public Builder setSingleChoiceItems(ListAdapter adpater, int checkedItem,
final OnClickListener listener)