Question

I’m trying to have a function where a layout is added to my view when a button is pressed. The ID’s of 2 EditTexts in the layout are added to a List<EditText>, so I can access them no matter how many instances of the XML layout are added. However, I’m having troubles getting this to work.

Main function setting up the view:

    ViewGroup view = null;
    TextView addressView;
    Button submit;
    ImageView addHeader;

    private int id = 0;
    private List<EditText> editTexts = new ArrayList<EditText>();


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

        view = (ViewGroup) findViewById(R.id.getLayout);


        addressView = (TextView) view.findViewById(R.id.getAddress);
        submit = (Button) view.findViewById(R.id.getSubmit);
        addHeader = (ImageView) view.findViewById(R.id.getHeaderAdd);

        addHeader.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {
                addHeaderBox();
            }           
        });

My function adding the layout:

private void addHeaderBox() {    
    LayoutInflater inflater = (LayoutInflater) this.getSystemService(Context.LAYOUT_INFLATER_SERVICE);

    inflater.inflate(R.layout.get_param, view, false);

    EditText nameBox = (EditText) view.findViewById(R.id.getValue);
    EditText valueBox = (EditText) view.findViewById(R.id.getName);

    nameBox.setId(id++);
    valueBox.setId(id++);

    editTexts.add(nameBox);
    editTexts.add(valueBox);
}   

getValue and getName are the ID’s of the two EditTexts in my layout (not the main getLayout).

07-19 10:25:13.088: E/AndroidRuntime(32034): java.lang.NullPointerException
07-19 10:25:13.088: E/AndroidRuntime(32034):    at myapp.httprequest.free.GETActivity.addHeaderBox(GETActivity.java:96)
07-19 10:25:13.088: E/AndroidRuntime(32034):    at myapp.httprequest.free.GETActivity.access$0(GETActivity.java:88)
07-19 10:25:13.088: E/AndroidRuntime(32034):    at myapp.httprequest.free.GETActivity$1.onClick(GETActivity.java:65)

Line 96 is nameBox.setId(id++)

Answer 1

Try:

.......
View someView = inflater.inflate(R.layout.get_param, view, false);

EditText nameBox = (EditText) someView.findViewById(R.id.getValue);
EditText valueBox = (EditText) someView.findViewById(R.id.getName);
........