Question

While I am working with help of tutorial I found this in textview android:text-“@string/hello” it shows some error.

Then I went through graphical view and right click the component and enter the text. Then that error removes and notifies me that

**Hardcoded string hello should use String resources**

Answer 1

In android, “@string/” refer to the string.xml in Project>res>values> location in your package explorer.

String.xml contains a xml file which refer to a string with an id.
Eg:

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <string name="hello">Hello World</string>
    <string name="app_name">My app</string>
</resources>

Here name=”hello” is the id & “Hello World” is its value. When @string/hello is used, the value will be shown.

Similar is the case with “@drawable/”. It will refer to the images used. and many more.

You can set text in text view programmatically. Eg:

TextView tv = (TextView)findViewById(R.id.text1);     //text1 is the id u provide in xml file
tv.setText("Hello World");

I hope it helped you.