Pro Android 4

Summary

Let’s summarize the topics covered in this chapter:

• Drag and drop support in Android 3.0, and implementing it prior to 3.0 using other methods
• Iterating through possible drop targets to see if a drop (that is, finger leaving the screen after dragging) occurred
• The difficulty of doing the math to keep track of where a dragged object is and whether it’s over a drop target
• Drag-and-drop support in Android 3.0+, which is much nicer because it eliminates a lot of guesswork
• Drag listeners, which can be any objects and do not need to be draggables or drop-target views
• The fact that a drag can occur across fragments
• The DragEvent object, which can contain lots of great information about what is being dragged and why
• How Android takes care of ...