parcel write boolean值
http://stackoverflow.com/questions/6201311/how-to-read-write-a-boolean-when-implementing-the-parcelable-interface
writeToParcel:
dest.writeByte((byte) (myBoolean ? 1 : 0)); //if myBoolean == true, byte == 1
readFromParcel:
myBoolean = in.readByte() != 0; //myBoolean == true if byte != 0