这个是从stackOverFlow上面找到的解决方案，主要用途是处理软

这个是从stackOverFlow上面找到的解决方案，主要用途是处理软键盘回删按钮backSpace时回调OnKeyListener

Results (English) 1:

This one is from stackOverFlow to find solutions, the main purpose is to deal with the soft keyboard back to the callback when the button backSpace delete OnKeyListener

Results (English) 2:

This is from stackOverFlow found above solution, the main purpose when treating soft keyboard Press delete button backSpace callback OnKeyListener

Results (English) 3:

This is the solution from the above to find stackOverFlow, the main purpose is to deal with the soft keyboard back to delete button backSpace callback OnKeyListener