最终我想确定我的程序运行的机器是笔记本电脑还是台式机。我想用 JNA 和 msn 的 PowrProf lib 来做到这一点,GetPwrCapabilities Function使用 LidPresent 标志。
SYSTEM_POWER_CAPABILITIES
的一部分struct(这是 GetPwrCapabilities()
方法的参数)
BYTE spare2[3];
BYTE spare3[8];
BATTERY_REPORTING_SCALE BatteryScale[3];
SYSTEM_POWER_STATE AcOnLineWake;
SYSTEM_POWER_STATE 枚举:
typedef enum _SYSTEM_POWER_STATE {
PowerSystemUnspecified = 0,
PowerSystemWorking = 1,
PowerSystemSleeping1 = 2,
PowerSystemSleeping2 = 3,
PowerSystemSleeping3 = 4,
PowerSystemHibernate = 5,
PowerSystemShutdown = 6,
PowerSystemMaximum = 7
} SYSTEM_POWER_STATE, *PSYSTEM_POWER_STATE;
枚举在此处进行了解释,但我不确定我是否正确执行此操作,因为我收到此错误:
Exception in thread "main" java.lang.IllegalArgumentException: Invalid Structure field in class JNAPlayground$PowrProf$SYSTEM_POWER_CAPABILITIES, field name 'AcOnLineWake', interface JNAPlayground$PowrProf$SYSTEM_POWER_STATE: The type "JNAPlayground$PowrProf$SYSTEM_POWER_STATE" is not supported: Native size for type "JNAPlayground$PowrProf$SYSTEM_POWER_STATE" is unknown
您能否指导我或为我指出正确的方向:
- 数组
- 枚举(如果我有这个错误)
- 如果我没有导入足够的库
到目前为止我的java代码:
public interface PowrProf extends StdCallLibrary
{
PowrProf INSTANCE = (PowrProf) Native.loadLibrary(
"C:\\WINDOWS\\system32\\PowrProf.dll", PowrProf.class);
public static interface SYSTEM_POWER_STATE
{
public static final int owerSystemUnspecified = 0;
public static final int PowerSystemWorking = 1;
public static final int PowerSystemSleeping1 = 2;
public static final int PowerSystemSleeping2 = 3;
public static final int PowerSystemSleeping3 = 4;
public static final int PowerSystemHibernate = 5;
public static final int PowerSystemShutdown = 6;
public static final int PowerSystemMaximum = 7;
}
public static class BATTERY_REPORTING_SCALE extends Structure
{
public long Granularity;
public long Capacity;
}
public static class SYSTEM_POWER_CAPABILITIES extends Structure
{
public boolean PowerButtonPresent;
public boolean SleepButtonPresent;
public boolean LidPresent;
public boolean SystemS1;
public boolean SystemS2;
public boolean SystemS3;
public boolean SystemS4;
public boolean SystemS5;
public boolean HiberFilePresent;
public boolean FullWake;
public boolean VideoDimPresent;
public boolean ApmPresent;
public boolean UpsPresent;
public boolean ThermalControl;
public boolean ProcessorThrottle;
public int ProcessorMinThrottle;
public int ProcessorMaxThrottle;
public boolean FastSystemS4;
public int spare2[] = new int[3];
public boolean DiskSpinDown;
public int spare3[] = new int[8];
public boolean SystemBatteriesPresent;
public boolean BatteriesAreShortTerm;
public BATTERY_REPORTING_SCALE BatteryScale[] = new BATTERY_REPORTING_SCALE[3];
public SYSTEM_POWER_STATE AcOnLineWake;
public SYSTEM_POWER_STATE SoftLidWake;
public SYSTEM_POWER_STATE RtcWake;
public SYSTEM_POWER_STATE MinDeviceWakeState;
public SYSTEM_POWER_STATE DefaultLowLatencyWake;
}
void GetPwrCapabilities( SYSTEM_POWER_CAPABILITIES result );
}
谢谢, 埃里克
最佳答案
在谷歌搜索完之后,我尝试重新访问 jna 的主网页并忽略这里的其他枚举问题。枚举的映射是here 。我的代码现在显示有一个盖子!
import com.sun.jna.Native;
import com.sun.jna.Structure;
import com.sun.jna.win32.StdCallLibrary;
public class JNAPlayground
{
public interface PowrProf extends StdCallLibrary
{
PowrProf INSTANCE = (PowrProf) Native.loadLibrary(
"C:\\WINDOWS\\system32\\PowrProf.dll", PowrProf.class);
public static class BATTERY_REPORTING_SCALE extends Structure
{
public long Granularity;
public long Capacity;
}
public static class SYSTEM_POWER_CAPABILITIES extends Structure
{
public boolean PowerButtonPresent;
public boolean SleepButtonPresent;
public boolean LidPresent;
public boolean SystemS1;
public boolean SystemS2;
public boolean SystemS3;
public boolean SystemS4;
public boolean SystemS5;
public boolean HiberFilePresent;
public boolean FullWake;
public boolean VideoDimPresent;
public boolean ApmPresent;
public boolean UpsPresent;
public boolean ThermalControl;
public boolean ProcessorThrottle;
public int ProcessorMinThrottle;
public int ProcessorMaxThrottle;
public boolean FastSystemS4;
public int spare2[] = new int[3];
public boolean DiskSpinDown;
public int spare3[] = new int[8];
public boolean SystemBatteriesPresent;
public boolean BatteriesAreShortTerm;
public BATTERY_REPORTING_SCALE BatteryScale[] = new BATTERY_REPORTING_SCALE[3];
public int AcOnLineWake;
public int SoftLidWake;
public int RtcWake;
public int MinDeviceWakeState;
public int DefaultLowLatencyWake;
}
void GetPwrCapabilities( SYSTEM_POWER_CAPABILITIES result );
}
public static void main( String[] args )
{
PowrProf lib2 = PowrProf.INSTANCE;
PowrProf.SYSTEM_POWER_CAPABILITIES systemPOWERCAPABILITIES = new PowrProf.SYSTEM_POWER_CAPABILITIES();
lib2.GetPwrCapabilities(systemPOWERCAPABILITIES);
System.out.println("Lid present:" + systemPOWERCAPABILITIES.LidPresent);
}
}
关于java - 结构复杂的JNA,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/2413973/