1.Dialog有四种,分别是AlertDialog，ProgressDialog，DatePickerDialog，TimePickerDialog

1.1AlertDialog

public class MainActivity extends Activity {

	private View view;

	private TextView tView;

	private EditText eText;

	@Override

	protected void onCreate(Bundle savedInstanceState) {

		super.onCreate(savedInstanceState);

		setContentView(R.layout.activity_main);

		LayoutInflater layoutInflater = (LayoutInflater) getSystemService(LAYOUT_INFLATER_SERVICE);

		view = layoutInflater.inflate(R.layout.cell, null);

		tView = (TextView) view.findViewById(R.id.tv2);

		eText = (EditText) view.findViewById(R.id.et1);

		new AlertDialog.Builder(this).setTitle("友情提示").setView(view)

				.setMessage("确定退出？")

				.setNegativeButton("取消", new OnClickListener() {

					@Override

					public void onClick(DialogInterface dialog, int which) {

						// TODO Auto-generated method stub

						Toast.makeText(MainActivity.this, "确定",

								Toast.LENGTH_SHORT).show();

					}

				}).setNeutralButton("中立", new OnClickListener() {

					@Override

					public void onClick(DialogInterface dialog, int which) {

						// TODO Auto-generated method stub

						Toast.makeText(MainActivity.this, "取消",

								Toast.LENGTH_SHORT).show();

					}

				}).setPositiveButton("确定", new OnClickListener() {

					@Override

					public void onClick(DialogInterface dialog, int which) {

						// TODO Auto-generated method stub

						Toast.makeText(MainActivity.this, eText.getText()

								.toString(), Toast.LENGTH_SHORT).show();

						// tView.setText(eText.getText().toString());

					}

				}).show();

	}

}

1.2ProgressDialog

	ProgressDialog pgd = new ProgressDialog(this);

		pgd.setTitle("nihao");

		pgd.setMessage("hehe");

		//pgd.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);

		pgd.setProgress(100);

		pgd.show();

1.3DatePickerDialog

DatePickerDialog datePickerDialog = new DatePickerDialog(this,new OnDateSetListener() {

		@Override

		public void onDateSet(DatePicker view, int year, int monthOfYear,

				int dayOfMonth) {

			// TODO Auto-generated method stub

		}

	}, myear,mmouth,mday);datePickerDialog.show();

1.4 TimePickerDialog

于1.3相同的使用方式。

2.Menu有三种：分别是：optionsMenu，SubMenu，ContextMenu

2.1.OptionsMenu

public boolean onCreateOptionsMenu(Menu menu) {

		menu.add(menu.NONE,1,menu.NONE,"菜单1");

		menu.add(menu.NONE,2,menu.NONE,"菜单2");

		menu.add(menu.NONE,3,menu.NONE,"菜单3");

		menu.add(menu.NONE,4,menu.NONE,"菜单4");

		menu.add(menu.NONE,5,menu.NONE,"菜单5");

		return true;

	}

@Override

public boolean onOptionsItemSelected(MenuItem item) {

	switch (item.getItemId()) {

	case 1:

		Toast.makeText(this,"1", Toast.LENGTH_SHORT).show();

		break;

	default:

		Toast.makeText(this,"其他", Toast.LENGTH_SHORT).show();

		break;

	}

	return super.onOptionsItemSelected(item);

}

2.2.SubMenu

@Override

	public boolean onCreateOptionsMenu(Menu menu) {

		menu.add(menu.NONE,1,menu.NONE,"菜单1");

		menu.add(menu.NONE,2,menu.NONE,"菜单2");

		menu.add(menu.NONE,3,menu.NONE,"菜单3");

		menu.add(menu.NONE,4,menu.NONE,"菜单4");

		menu.add(menu.NONE,5,menu.NONE,"菜单5");

		SubMenu subMenu = menu.addSubMenu(menu.NONE,6,menu.NONE,"菜单6");

		subMenu.setHeaderTitle("你好");

		subMenu.setIcon(R.drawable.ic_launcher);

		subMenu.addSubMenu(menu.NONE,7,menu.NONE,"菜单7");

		return true;

	}

@Override

public boolean onOptionsItemSelected(MenuItem item) {

	switch (item.getItemId()) {

	case 1:

		Toast.makeText(this,"1", Toast.LENGTH_SHORT).show();

		break;

	default:

		Toast.makeText(this,"其他", Toast.LENGTH_SHORT).show();

		break;

	}

	return super.onOptionsItemSelected(item);

}

2.3ContextMenu

public class MainActivity extends Activity {

	@Override

	protected void onCreate(Bundle savedInstanceState) {

		super.onCreate(savedInstanceState);

		setContentView(R.layout.activity_main);

TextView textView = (TextView) findViewById(R.id.tv1);

registerForContextMenu(textView);

	}

@Override

public void onCreateContextMenu(ContextMenu menu, View v,

		ContextMenuInfo menuInfo) {

	menu.add(menu.NONE,1,menu.NONE,"菜单1");

	menu.add(menu.NONE,2,menu.NONE,"菜单2");

	menu.add(menu.NONE,3,menu.NONE,"菜单3");

	menu.add(menu.NONE,4,menu.NONE,"菜单4");

	menu.add(menu.NONE,5,menu.NONE,"菜单5");

	super.onCreateContextMenu(menu, v, menuInfo);

}

	@Override

	public boolean onContextItemSelected(MenuItem item) {

		// TODO Auto-generated method stub

		switch (item.getItemId()) {

		case 1:

			Toast.makeText(this,"1",Toast.LENGTH_SHORT).show();

			break;

		default:

			break;

		}

		return super.onContextItemSelected(item);

	}

}

3.Notification

NotificationManager notificationManager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);

       //声明Notification

	    Notification notification = new Notification();

	    //设置notification的参数

	    notification.icon=R.drawable.ic_launcher;

	   Intent intent = new Intent(this,MainActivity.class);

	   PendingIntent pendingIntent = PendingIntent.getActivity(this,0, intent,0);

	   notification.setLatestEventInfo(this,"haha" ,"contentText",pendingIntent);

	   notificationManager.notify(10,notification);

4.TabHost

TabHost tabHost = getTabHost();

		LayoutInflater.from(this).inflate(R.layout.activity_main,

				tabHost.getTabContentView(), true);

		Intent intent = new Intent(MainActivity.this, SeocndActivity.class);

		tabHost.addTab(tabHost.newTabSpec("tab1").setIndicator("搜索")

				.setContent(intent));

		tabHost.addTab(tabHost.newTabSpec("tab2").setIndicator("搜索")

				.setContent(intent));

		tabHost.addTab(tabHost.newTabSpec("tab2").setIndicator("搜索")

				.setContent(R.id.l1));