gistfile1.java

package cn.yo2.aquarium.alertdialogtest;

import android.app.Activity;
import android.app.AlertDialog;
import android.app.Dialog;
import android.os.Bundle;
import android.text.format.DateFormat;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;

public class Main extends Activity {
	private static final int TIME_ALERT_DIALOG_1 = 1;
	private static final int TIME_ALERT_DIALOG_2 = 2;

	/** Called when the activity is first created. */
	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.main);

		Button button1 = (Button) findViewById(R.id.btn_show_1);

		Button button2 = (Button) findViewById(R.id.btn_show_2);

		button1.setOnClickListener(new OnClickListener() {

			public void onClick(View v) {
				// TODO Auto-generated method stub
				showDialog(TIME_ALERT_DIALOG_1);
			}
		});

		button2.setOnClickListener(new OnClickListener() {

			public void onClick(View v) {
				// TODO Auto-generated method stub
				showDialog(TIME_ALERT_DIALOG_2);
			}
		});
	}

	@Override
	protected Dialog onCreateDialog(int id) {
		switch (id) {
		case TIME_ALERT_DIALOG_1:
			AlertDialog.Builder timeDialog1 = new AlertDialog.Builder(this);
			timeDialog1.setTitle("Alert 1: have not called setMessage in onCreateDialog");

			return timeDialog1.create();
		case TIME_ALERT_DIALOG_2:
			AlertDialog.Builder timeDialog2 = new AlertDialog.Builder(this);
			timeDialog2.setTitle("Alert 2: have called setMessage in onCreateDialog");
			timeDialog2.setMessage("");
			return timeDialog2.create();
		default:
			break;
		}
		return super.onCreateDialog(id);
	}

	@Override
	protected void onPrepareDialog(int id, Dialog dialog) {
		switch (id) {
		case TIME_ALERT_DIALOG_1:

			AlertDialog timeDialog1 = (AlertDialog) dialog;
			timeDialog1.setMessage(DateFormat.format("h:mm:ss", System
					.currentTimeMillis()));
			break;
		case TIME_ALERT_DIALOG_2:

			AlertDialog timeDialog2 = (AlertDialog) dialog;
			timeDialog2.setMessage(DateFormat.format("h:mm:ss", System
					.currentTimeMillis()));
			break;
		default:
			break;
		}
		super.onPrepareDialog(id, dialog);
	}
}