package?com.example.bluetooth.le.packet;
import?java.util.linkedList;
import?java.util.List;

/**
?*?發送指令分包
?*/
public?class?BlePacketUtil?{
????/**
?????*?默認一包發送20字節數據
?????*/
????private?static?final?int?BUFFER_SIZE?=?20;

????/**
?????*?分包發送數據
?????*
?????*?@param?data?發送數據
?????*/
????public?static?List?writeEntity（byte[]?data）?{
????????if?（data?==?null）?{
????????????return?null;
????????}
????????List?packDataList?=?new?linkedList（）;
????????int?index?=?0;
????????int?runSize?=?0;
????????int?lastDataSize?=?0;
????????int?length?=?data.length;
????????while?（index?????????????byte[]?txBuffer?=?new?byte[BUFFER_SIZE];
????????????for?（int?i?=?0;?i?????????????????if?（index?????????????????????txBuffer[i]?=?data[index++];
????????????????}
????????????????runSize++;
????????????}
????????????if?（length?==?index）?{
????????????????lastDataSize?=?BUFFER_SIZE?-?（runSize?-?index）;
????????????????byte[]?lastBuffer?=?new?byte[lastDataSize]