Android basic1

View:

xml visualizer:

http://labs.udacity.com/android-visualizer/#/android/sandbox

hex color:

http://www.w3schools.com/colors/colors_hex.asp

ImageView:

<ImageView

    android:src="@drawable/cake" //don't need to write the suffix,just name

    android:layout_width="wrap_content"

    android:layout_height="wrap_content"

    android:scaleType="centerCrop"/>//no any white border,fully

developer.android.com

<TextView>:sp is only for font:scaled pixel

google: TextView android