java - 如何从其他布局 Android 中 getText()

Question

如何从其他 .xml 中 getText() AutoCompleteTextView ？我已经尝试过这段代码:

    //getFragmentOrder
    LayoutInflater inflater = (LayoutInflater)getContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    FormDataOrder = inflater.inflate(R.layout.formdata_order_content_main, null);

    ti_namapic = (AutoCompleteTextView) FormDataOrder.findViewById(R.id.ti_namapic);

    String a = ti_namapic.getText().toString();
    System.out.println("Value --> "+ a);

如果我在.xml中手动设置(android:text = "MyText")，我收到该文本，但如果我从设备屏幕键入/输入，我不会收到该值。

编辑:这是我的完整代码。

public class FormDataObject extends Fragment {

AutoCompleteTextView ti_desc;
AutoCompleteTextView ti_group;

View v;
Button btn_ok;

/*--------------------------------------*/
View FormDataOrder;

AutoCompleteTextView ti_namapic;

/* =========================================================================================== */
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState)
{
    v = inflater.inflate(R.layout.formdata_object_content_main,container,false);


    addButtonListener();

    return v;
}

/* =========================================================================================== */
public void addButtonListener()
{

    ti_desc = (AutoCompleteTextView) v.findViewById(R.id.ti_desc);
    ti_group = (AutoCompleteTextView) v.findViewById(R.id.ti_group);

    btn_ok = (Button) v.findViewById(R.id.btn_ok);
    btn_ok.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            getValueFromFragmentOrder();

            System.out.println("ti_desc ----> " + ti_desc.getText());
            System.out.println("ti_group ----> " + ti_group.getText());
        }
    });
}

/* =========================================================================================== */
public void getValueFromFragmentOrder()
{
    System.out.println("getComponentFromOthersFragment ----------> RUN");

    //getFragmentOrder
    LayoutInflater inflater = (LayoutInflater)getContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    FormDataOrder = inflater.inflate(R.layout.formdata_order_content_main, null);

    ti_namapic = (AutoCompleteTextView) FormDataOrder.findViewById(R.id.ti_namapic);

    String a = ti_namapic.getText().toString();

    System.out.println("Value ----------> "+ a);
}
}

“getValueFromFragmentOrder();”不工作，值 a --> 返回 null/空

Answer 1

您正在膨胀布局，但您没有在任何地方添加该 View 。首先添加 View ，然后获取值。它会起作用的。