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n a perfect world when you start building a structure such as a house, all the parties involved communicate all the details of the project in a detailed fashion. However, as you probably know, we do not live in a perfect world. You will certainly find that this is the case when developing software systems and applications. Typically, the client is not sure of what they want the system or project to do; or, they are aware of what they want it to do, but only conceptually. Regardless of what the client knows or can communicate, one factor seems to be a constant the client wants the project completed as soon as possible. The phrase I want it finished yesterday seems to be common in the software world. This pressure from the client can often result in the developer or development team overlooking the requirements phase of the project and proceeding prematurely to the actual coding and development phases with only a slim idea about what they need to build. In this chapter, you will explore the ins and outs of gathering the requirements from the client for your project. You will also examine the pressure to bypass this phase that clients and management teams often place upon the development teams. Specifically, I will answer the following questions in this chapter: What exactly is requirement gathering Why is it beneficial What is the Microsoft Solution Framework How do you gather requirements What are the official case study requirements

public class SpinnerDemo extends Activity implements AdapterView.OnItemSelectedListener { TextView selection; String[] items={"lorem", "ipsum", "dolor", "sit", "amet", "consectetuer", "adipiscing", "elit", "morbi", "vel", "ligula", "vitae", "arcu", "aliquet", "mollis", "etiam", "vel", "erat", "placerat", "ante", "porttitor", "sodales", "pellentesque", "augue", "purus"}; @Override public void onCreate(Bundle icicle) { super.onCreate(icicle); setContentView(R.layout.main); selection=(TextView)findViewById(R.id.selection); Spinner spin=(Spinner)findViewById(R.id.spinner); spin.setOnItemSelectedListener(this);

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You may be asking, why is the author explaining to me what a requirement is To answer this question, many development teams and companies overlook this phase and jump straight to the development phase as a result of wanting to get the project finished as soon as they can. A common quote attributed to Yogi Berra is, If you don t know where you are going, how will you know when you get there This is applicable within this discussion because some developers and development teams indeed start building software applications without knowing what they re building. But how will you know for sure when the project is finished for your customer or client The simple answer is, you never really will, and you can find yourself in quite the predicament.

ArrayAdapter<String> aa=new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item, items); aa.setDropDownViewResource( android.R.layout.simple_spinner_dropdown_item); spin.setAdapter(aa); } public void onItemSelected(AdapterView< > parent, View v, int position, long id) { selection.setText(items[position]); } public void onNothingSelected(AdapterView< > parent) { selection.setText(""); } }

Menu items can have icons. To provide an icon in the form of a reference to a drawable resource (e.g., @drawable/eject), use the android:icon attribute on the item element.

This oversight in my experience has often led to the project duration being longer and more work being performed than necessary, thus creating more of an expense for the client After reading the previous paragraph, you are probably thinking that this is an overstatement Perhaps it is; however, many projects today in the real world will be managed in this fashion, without requirements gathering, because of the pressure to produce a system as quickly as possible for the client Many undesired results can arise from proceeding in this way That is why it is much more beneficial to inform your client that taking the extra time in the beginning to discuss, gather, and document the specific requirements will almost always save a great amount of time at the end and produce a system that will function in the way it has been expected to function.

Here, we attach the activity itself as the selection listener (spin.setOnItemSelectedListener(this)). This works because the activity implements the OnItemSelectedListener interface. We configure the adapter not only with the list of fake words, but also with a specific resource to use for the drop-down view (via aa.setDropDownViewResource()). Also notice the use of android.R.layout.simple_spinner_item as the built-in View for showing items in the spinner itself. Finally, we implement the callbacks required by OnItemSelectedListener to adjust the selection label based on user input. Figures 7 4 and 7 5 show the results.

Now, I will briefly explain what a requirement is and then what the entire process entails A requirement is a sometimes detailed and sometimes not detailed instruction that a system or finished product must include or perform When in the context of software, a requirement is typically referring to a feature that the overall system needs to perform For example, a requirement of an e-commerce system might be that the system will implement a customized shopping cart as opposed to a premade, third-party shopping cart Every system or structure needs to have an initial plan so that those constructing it know what they need to build Therefore, when setting out to build a software application or an e-commerce application, you need to establish some type of blueprint, prior to taking the first step, that contains all the requirements You might be thinking that gathering requirements seems pretty simple to do.

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