Android应用开发笔记 - 项目代码3

1.3 App类控件

MainActivity.java

package com.example.apppalettesdemo;

import android.os.Bundle;
import android.app.Activity;
import android.app.AlertDialog;
import android.app.AlertDialog.Builder;
import android.app.Notification;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.app.ProgressDialog;
import android.content.DialogInterface;
import android.content.DialogInterface.OnClickListener;
import android.content.Intent;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.Toast;

public class MainActivity extends Activity implements OnClickListener {

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

@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.my_options_menu, menu);
return true;
}

@Override
public boolean onOptionsItemSelected(MenuItem item) {
// TODO Auto-generated method stub
Boolean flag = false;

switch (item.getItemId()) {
case R.id.AlertDialog01:
Builder dialog = new AlertDialog.Builder(MainActivity.this);
dialog.setTitle("Hint");
dialog.setMessage("This is Message!");
dialog.setPositiveButton("Ok", this);
dialog.show();

flag = true;
break;

case R.id.notificationManager01:
NotificationManager notiManager =
(NotificationManager) getSystemService(NOTIFICATION_SERVICE);

Notification notiInst = new Notification(
R.drawable.ic_launcher, "This is notify 2012-09-12",
System.currentTimeMillis());
PendingIntent pendIntent = PendingIntent.getActivity(
this, 0, new Intent(this, MainActivity.class),
PendingIntent.FLAG_UPDATE_CURRENT);
notiInst.setLatestEventInfo(this, "Notify", "Notify 01", pendIntent);

notiManager.notify(0, notiInst);

flag = true;
break;

case R.id.progressDialog01:
ProgressDialog progrDialog = new ProgressDialog(this);
progrDialog.setProgressStyle(ProgressDialog.STYLE_SPINNER);
progrDialog.setMessage("Loading Information...");
progrDialog.show();

flag = true;
break;

default:
break;
}

return flag;
}

// DialogInterface
@Override
public void onClick(DialogInterface dialog, int which) {
// TODO Auto-generated method stub
Toast.makeText(this, "You just press 'AlertDialog' button!", Toast.LENGTH_SHORT).show();
}

}