如何实现内部类的实例化呢,我的代码错误Unable to instantiate application android.app.Application: java.lang.NullPointerException
dev_item.class
public class dev_item {
static public final byte DEV_MAX_NUM = 32;
public byte dev_type;
public String dev_name;
public String dev_no;
public String dev_ip;
public byte send_stat;
public int radio_flag;
public dev_item(){
}
}
`
dev_grp.class
public class dev_grp {
public dev_grp()
{
dev_list = new dev_item[dev_item.DEV_MAX_NUM];
for(int i=0; i<dev_item.DEV_MAX_NUM; i++)
{
dev_list[i] = new dev_item();
dev_num = 0;
}
}
static public byte dev_num;
static public byte dev_send_ctrl_index;
static public dev_item dev_list[];
}
``