尝试将数字设置为EditText中的文本

Question

I am having trouble setting a double in an edittext and I cannot get rid of the error. What am I doing wrong?

Here is what I have:

    final EditText somedouble_et = (EditText)findViewById(R.id.somedouble_search);
    somedouble_et.setText(doubleNumber.toString(), TextView.BufferType.EDITABLE);

The error I am getting is that is doesn't recognize TextView as a class. Is there an error in my xml?

<EditText android:layout_width = "fill_parent"
    android:layout_height = "fill_parent"
    android:id="@+id/somedouble"
    android:inputType="numberSigned"
    android:hint = ""
    android:text = "@+id/somedouble_search"/>

It does not seem to matter what id I use.

Answer 1

Should the first line of your code not be

final EditText somedouble_et = (EditText)findViewById(R.id.somedouble);

and in the xml, android:text should not be "@+id" anything!

Make sure you have imported TextView at the top of your code.

Answer 2

In your XML file, the android:id field should be as follows:

android:id="@+id/somedouble_search"

The text field should either be hardcoded ("mytext") or refer to a string resource (@string/mystringresource).

Hardcoded

android:text = "Hardcoded text"

Referencing something from strings.xml

android:text="@string/mystringresource"

The following piece of code is searching for an EditText with the id of somedouble_search in your XML file, yet your id is defined as android:id="@+id/somedouble"

final EditText somedouble_et = (EditText)findViewById(R.id.somedouble_search);

Remember

To reference any object defined in an XML, you reference it by its id defined in the xml - NOT by its text attribute. The text attribute only defines what text should be displayed.

For reference, please see this link.