CODEWITHSUNDEEP
androidandroid-layout
dacongy
dacongy

Reputation: 2552

meaning of setting android:text to @+id/xyz

What does it mean to set the android:text attribute of a view in a layout xml file to something like @+id/xyz. An example can be found at https://github.com/freezy/android-xbmcremote/blob/master/res/layout/actor_item.xml

Relevant code copied here:

    <TextView 
        android:text="@+id/actor_name" 
        android:id="@+id/actor_name" 
        android:textColor="#ffffff"
        android:layout_width="wrap_content" 
        android:layout_height="wrap_content" />
    <TextView 
        android:text="@+id/actor_role" 
        android:id="@+id/actor_role" 
        android:layout_width="wrap_content" 
        android:layout_height="wrap_content" />

Upvotes: 1

Views: 163

Answers (4)

Jitesh Upadhyay
Jitesh Upadhyay

Reputation: 5260

please visit http://developer.android.com/guide/topics/ui/declaring-layout.html#id

The plus (+) sign just indicates it that the ID should be created if it is not under existence at the moment.

It is a general practice to use @+id/something when defining a new View in a layout, and then later use @id/something to reference the View from another part of the layout (say, in any RelativeLayout ) or R.id.something to reference it from our java code.

Upvotes: 0

M S Gadag
M S Gadag

Reputation: 2057

"@+id/id" means you are giving a unique name or id for textview which will help to identify that textview and android:text is like body of the textview u can give anything which u want to display.

Upvotes: 1

Keya
Keya

Reputation: 849

"android:text" requires to set String to it. It's the text that will appear in the TextView.

You can either use a plain string or use @string to extract the string from res/values/strings.xml

<TextView 
    android:text="@string/actor_name" 
    android:id="@+id/actor_name" 
    android:textColor="#ffffff"
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" />

"@+id/id" is a kind of action that tells the android framework to create an id. The plus symbol, +, indicates that this is a new resource ID and will be created if doesn't exist.

Upvotes: 0

Szymon
Szymon

Reputation: 43023

That doesn't make much sense. According to documentation what you assign to android:text must be a string value:

Must be a string value, using \\; to escape characters such as \\n or \\uxxxx for a unicode character.

This may also be a reference to a resource (in the form "@[package:]type:name") or theme attribute (in the form "?[package:][type:]name") containing a value of this type.

Values of @id are integers.

Upvotes: 1

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