How Android distinguishes between real-computer and simulator

One, native way.

Read the configuration and hardware-related information in the device through the C code.

1,diskstats

Gets the partition state information for the Flash.

int fd = open ("/proc/diskstats", o_rdonly);

bytes = Read (fd, buf, bytes);

Difference: There are mmcblk0 partitions on the real machine, but the simulator has no partition information.

2,mac address.

Read the MAC address through the socket and the IOCTL.

SOCKFD = socket (af_inet, SOCK_DGRAM, 0);

IOCTL (SOCKFD, siocgifconf, (char*) &ifc);

IOCTL (SOCKFD, SIOCGIFADDR, &ifr[i])

IOCTL (SOCKFD, SIOCGIFHWADDR, (char*) &ifr[i])

Difference: The real machine can get Wlan0 IP and MAC address, the simulator can only get eth0 IP and MAC address;

3, useful prop information.

__system_property_get (key, BUF);

Difference: The simulator does not have the Ro.boot.serialno and Ro.serialno properties, the machine serial number in the real machine.

The simulator Ro.hardware property is goldfish and the real machine is the respective model.

4,CPU information.

int fd = open ("/proc/cpuinfo", o_rdonly);

bytes = Read (fd, buf, bytes);

Difference: The Cpuinfo hardware in the simulator is goldfish.

5,drivers

int fd = open ("/proc/tty/drivers", o_rdonly);

Difference: The simulator contains goldfish drivers

6, simulator-specific files.

int fd = open ("/dev/socket/qemud", o_rdonly);

int fd = open ("/dev/qemu_pipe", o_rdonly);

The difference: Emulator proprietary files, not in the real machine.

Two, the traditional way:

It can be obtained from Java layer code in the following ways:

1,imei and IMSI

IMEI Mobile Device International identification code.

IMSI IMSI International Mobile Subscriber ID, stored in SIM card

Final Telephonymanager TM = (Telephonymanager) getbasecontext (). Getsystemservice (Context.telephony_service);

String IMEI = Tm.getdeviceid ();

String IMSI = Tm.getsubscriberid ();

Device 1:354273055927169/null (no card)

Equipment 2:862966024243759/460011040618938

Simulator: 000000000000000/310260000000000

2,serial Serial Number

String serial = Android.os.Build.SERIAL;

Equipment 1:4df78680771b117b

Equipment 2:OBAI5HDQZPDIRCQG

Simulator: Unknown

3,android_id

String android_id = secure.getstring (Getcontentresolver (), secure.android_id);

Devices and simulators are available, 16-bit.

4,mac Address

Wifimanager wifimanage= (Wifimanager) Getsystemservice (Context.wifi_service); Wifiinfo wifiinfo= wifimanage.getconnectioninfo ();

Equipment 1:88:32:9B:1E:49:20

Equipment 2:f8:a4:5f:fd:56:17

Emulator: null

How Android distinguishes between real-computer and simulator