Android常识总结

// 重写方法   点击菜单 弹出的菜单项的设置	@Override	public boolean onCreateOptionsMenu(Menu menu) {				menu.add(0, Config_constant.MENU_EXIT, 0, "退出")			.setIcon(R.drawable.exit);		return super.onCreateOptionsMenu(menu);	}// 用户点击菜单选项触发的事件	@Override	public boolean onOptionsItemSelected(MenuItem item) {		switch(item.getItemId()){				case Config_constant.MENU_EXIT:					//按下退出菜单选项			new AlertDialog.Builder(this)							.setTitle("提示")							.setMessage("确认退出吗？")							.setIcon(R.drawable.alert_icon)							.setPositiveButton(									"确定",									new DialogInterface.OnClickListener() {									@Override									public void onClick(DialogInterface dialog, int which) {										android.os.Process.killProcess(android.os.Process.myPid());		//结束进程  退出程序										TabDemoActivity.this.finish();									}							})							.setNegativeButton(									"取消",									new DialogInterface.OnClickListener() {										@Override										public void onClick(DialogInterface dialog, int which) {}									})							.show();							break;			}		return super.onOptionsItemSelected(item);	}