Dialog的4中功能的展示，以及他的监听方法

public class ActivityMain extends Activity {
 //为dialog排序方便后面判断使用
 private static final int DIALOG1 = 1;
 private static final int DIALOG2 = 2;
 private static final int DIALOG4 = 4;
 private static final int DIALOG3 = 3;

//判断dialog，并却返回到指定的方法中,这里的方法是以个回调方法，执行后面的showDialog()方法后都会回调
 @Override
 protected Dialog onCreateDialog(int id) {
  switch (id) {
  case DIALOG1:
   return buildDialog1(ActivityMain.this);

  case DIALOG2:
   return buildDialog2(ActivityMain.this);

  case DIALOG3:
   return buildDialog3(ActivityMain.this);
  case DIALOG4:
   return buildDialog4(ActivityMain.this);

  }
  return null;
 }
 
 protected void onPrepareDialog(int id, Dialog dialog){
  if(id==DIALOG1){
   setTitle("测试");
  }
 }
  //为Activity设置布局以及按钮的监听
 @Override
 protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.alert_dialog);

  Button button1 = (Button) findViewById(R.id.button1);
  button1.setOnClickListener(new OnClickListener() {
   public void onClick(View v) {
    showDialog(DIALOG1);
   }
  });

  Button buttons2 = (Button) findViewById(R.id.buttons2);
  buttons2.setOnClickListener(new OnClickListener() {
   public void onClick(View v) {
    showDialog(DIALOG2);
   }
  });

  Button button3 = (Button) findViewById(R.id.button3);
  button3.setOnClickListener(new OnClickListener() {
   public void onClick(View v) {
    showDialog(DIALOG3);
   }
  });
  
  Button button4 = (Button) findViewById(R.id.button4);
  button4.setOnClickListener(new OnClickListener() {
   public void onClick(View v) {
    showDialog(DIALOG4);
   }
  });
 }
//为Dialog设置内容以及按键监听
 private Dialog buildDialog1(Context context) {
  //AlertDialog是Dialog的子类,Builder为AlertDialog的内部类,通过Builder为AlertDialog来设置内容
  AlertDialog.Builder builder = new AlertDialog.Builder(context);
  //builder设置AlertDialog中的提示图标
  builder.setIcon(R.drawable.alert_dialog_icon);
  //builder设置AlertDialog中的提示文本
  builder.setTitle(R.string.alert_dialog_two_buttons_title);
  //builder设置AlertDialog中左按键的名以及按键监听
  builder.setPositiveButton(R.string.alert_dialog_ok,
    new DialogInterface.OnClickListener() {
     public void onClick(DialogInterface dialog, int whichButton) {

      setTitle("点击了对话框上的确定按钮");
     }
    });
  //builder设置AlertDialog中右按键的名以及按键监听
  builder.setNegativeButton(R.string.alert_dialog_cancel,
    new DialogInterface.OnClickListener() {
     public void onClick(DialogInterface dialog, int whichButton) {

      setTitle("点击了对话框上的取消按钮");
     }
    });
  //返回 builder的create()方法
  return builder.create();

 }
 private Dialog buildDialog2(Context context) {
  AlertDialog.Builder builder = new AlertDialog.Builder(context);
  builder.setIcon(R.drawable.alert_dialog_icon);
  builder.setTitle(R.string.alert_dialog_two_buttons_msg);
  //builder设置AlertDialog中的多文本提示信息
  builder.setMessage(R.string.alert_dialog_two_buttons2_msg);
  builder.setPositiveButton(R.string.alert_dialog_ok,
    new DialogInterface.OnClickListener() {
     public void onClick(DialogInterface dialog, int whichButton) {

      setTitle("点击了对话框上的确定按钮");
     }
    });
  //builder设置AlertDialog中中间按键以及监听
  builder.setNeutralButton(R.string.alert_dialog_something,
    new DialogInterface.OnClickListener() {
     public void onClick(DialogInterface dialog, int whichButton) {

      setTitle("点击了对话框上的进入详细按钮");
     }
    });
  builder.setNegativeButton(R.string.alert_dialog_cancel,
    new DialogInterface.OnClickListener() {
     public void onClick(DialogInterface dialog, int whichButton) {

      setTitle("点击了对话框上的取消按钮");
     }
    });
  return builder.create();
 }

 private Dialog buildDialog3(Context context) {
  //LayoutInflater为动态加载xml方法主要为不是activity的其他空间添加布局方法
  LayoutInflater inflater = LayoutInflater.from(this);
  //创建View来赋值LayoutInflater的布局
  final View textEntryView = inflater.inflate(
    R.layout.alert_dialog_text_entry, null);
  AlertDialog.Builder builder = new AlertDialog.Builder(context);
  builder.setIcon(R.drawable.alert_dialog_icon);
  builder.setTitle(R.string.alert_dialog_text_entry);
  //通过builder为LayoutInflater加载布局
  builder.setView(textEntryView);
  builder.setPositiveButton(R.string.alert_dialog_ok,
    new DialogInterface.OnClickListener() {
     public void onClick(DialogInterface dialog, int whichButton) {
      setTitle("点击了对话框上的确定按钮");
     }
    });
  builder.setNegativeButton(R.string.alert_dialog_cancel,
    new DialogInterface.OnClickListener() {
     public void onClick(DialogInterface dialog, int whichButton) {
      setTitle("点击了对话框上的取消按钮");
     }
    });
  return builder.create();
 }
 
//下面是进度对话框
 private Dialog buildDialog4(Context context) {
  //申明进度对话框，可以直接new.
  ProgressDialog dialog = new ProgressDialog(context);
  dialog.setTitle("正在下载歌曲");
  dialog.setMessage("请稍候……");
  return  dialog;
 }
}