Using color in Android, by XML

In Android, colors can be defined directly, such as "#ff0000" for red. You can also create a resource file under /res/values folder(with any file name), with your own color id defined inside. Such that you can access them in Java code using id. Android also defined a baseset in android.R.color.

example:

/res/values/mycolor.xml

<?xml version="1.0" encoding="utf-8"?> <resources> <color name="red">#ff0000</color> <color name="green">#00ff00</color> <color name="blue">#0000ff</color> </resources>

/res/layout/main.xml

<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent" android:id="@+id/background" > <TextView android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="@string/hello" /> <!-- "white" defined in Android base set of colors --> <Button android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="WHITE" android:textColor="@android:color/white" android:id="@+id/whitebutton" /> <!-- direct define textColor --> <Button android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="RED" android:textColor="#ff0000" android:id="@+id/redbutton" /> <!-- "green" defined in mycolor.xml --> <Button android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="GREEN" android:textColor="@color/green" android:id="@+id/greenbutton" /> <!-- "blue" defined in mycolor.xml --> <Button android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="BLUE" android:textColor="@color/blue" android:id="@+id/bluebutton" /> </LinearLayout>

Using color in Android, by XML

Using color in Android, by XML

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