实现从文件读取自定义GPS位置的功能，增强了GPS定位的灵活性

android-15.0.0_r36/frameworks/base/0002-frameworks-base-gnss.patch

@@ -1,18 +1,16 @@
 --- a/frameworks/base/services/core/jni/com_android_server_location_GnssLocationProvider.cpp
 +++ b/frameworks/base/services/core/jni/com_android_server_location_GnssLocationProvider.cpp
-@@ -66,6 +66,11 @@
+@@ -66,6 +66,9 @@
  #include "jni.h"
  #include "utils/Log.h"
  #include "utils/misc.h"
 +#include <fstream>
 +#include <sstream>
 +#include <sys/stat.h>
-+
-+// Custom GPS location from file support
  
  static jclass class_gnssPowerStats;
  
-@@ -78,6 +83,15 @@
+@@ -75,6 +78,75 @@ static jmethodID method_isInEmergencySession;
  static jmethodID method_gnssPowerStatsCtor;
  static jmethodID method_setSubHalPowerIndicationCapabilities;
  
@@ -23,16 +21,6 @@
 +static time_t lastFileModTime = 0;
 +static const char* GPS_LOCATION_FILE = "/data/vendor/gps/custom_location.txt";
 +
-+// Function to read GPS coordinates from file
-+static bool readGpsLocationFromFile();
-+
- using android::OK;
- using android::sp;
- using android::status_t;
-@@ -200,6 +214,64 @@
- std::unique_ptr<android::gnss::MeasurementCorrectionsInterface> gnssMeasurementCorrectionsIface =
-         nullptr;
- 
 +// Function to read GPS coordinates from file
 +static bool readGpsLocationFromFile() {
 +    struct stat fileStat;
@@ -95,10 +83,10 @@
 +    return false;
 +}
 +
- namespace android {
- 
- namespace {
-@@ -367,6 +439,9 @@
+ using android::OK;
+ using android::sp;
+ using android::status_t;
+@@ -377,6 +449,9 @@ static jboolean android_location_gnss_hal_GnssNative_set_position_mode(
  }
  
  static jboolean android_location_gnss_hal_GnssNative_start(JNIEnv* /* env */, jclass) {
@@ -108,11 +96,16 @@
      return gnssHal->start();
  }
  
-@@ -443,8 +518,17 @@
+@@ -457,12 +532,24 @@ static void android_location_gnss_hal_GnssNative_inject_best_location(
          jfloat speedAccuracyMetersPerSecond, jfloat bearingAccuracyDegrees, jlong timestamp,
          jint elapsedRealtimeFlags, jlong elapsedRealtimeNanos,
          jdouble elapsedRealtimeUncertaintyNanos) {
 -    gnssHal->injectBestLocation(gnssLocationFlags, latitudeDegrees, longitudeDegrees,
+-                                altitudeMeters, speedMetersPerSec, bearingDegrees,
+-                                horizontalAccuracyMeters, verticalAccuracyMeters,
+-                                speedAccuracyMetersPerSecond, bearingAccuracyDegrees, timestamp,
+-                                elapsedRealtimeFlags, elapsedRealtimeNanos,
+-                                elapsedRealtimeUncertaintyNanos);
 +    
 +    // Check for custom GPS location from file
 +    if (readGpsLocationFromFile()) {
@@ -125,20 +118,24 @@
 +                                    elapsedRealtimeUncertaintyNanos);
 +    } else {
 +        gnssHal->injectBestLocation(gnssLocationFlags, latitudeDegrees, longitudeDegrees,
-                                     altitudeMeters, speedMetersPerSec, bearingDegrees,
-                                     horizontalAccuracyMeters, verticalAccuracyMeters,
-                                     speedAccuracyMetersPerSecond, bearingAccuracyDegrees, timestamp,
-                                     elapsedRealtimeFlags, elapsedRealtimeNanos,
-                                     elapsedRealtimeUncertaintyNanos);
++                                    altitudeMeters, speedMetersPerSec, bearingDegrees,
++                                    horizontalAccuracyMeters, verticalAccuracyMeters,
++                                    speedAccuracyMetersPerSecond, bearingAccuracyDegrees, timestamp,
++                                    elapsedRealtimeFlags, elapsedRealtimeNanos,
++                                    elapsedRealtimeUncertaintyNanos);
 +    }
  }
  
  static void android_location_gnss_hal_GnssNative_inject_location(
-@@ -455,8 +539,17 @@
+@@ -472,11 +559,22 @@ static void android_location_gnss_hal_GnssNative_inject_location(
          jfloat speedAccuracyMetersPerSecond, jfloat bearingAccuracyDegrees, jlong timestamp,
          jint elapsedRealtimeFlags, jlong elapsedRealtimeNanos,
          jdouble elapsedRealtimeUncertaintyNanos) {
 -    gnssHal->injectLocation(gnssLocationFlags, latitudeDegrees, longitudeDegrees, altitudeMeters,
+-                            speedMetersPerSec, bearingDegrees, horizontalAccuracyMeters,
+-                            verticalAccuracyMeters, speedAccuracyMetersPerSecond,
+-                            bearingAccuracyDegrees, timestamp, elapsedRealtimeFlags,
+-                            elapsedRealtimeNanos, elapsedRealtimeUncertaintyNanos);
 +    
 +    // Check for custom GPS location from file
 +    if (readGpsLocationFromFile()) {
@@ -150,10 +147,10 @@
 +                                elapsedRealtimeNanos, elapsedRealtimeUncertaintyNanos);
 +    } else {
 +        gnssHal->injectLocation(gnssLocationFlags, latitudeDegrees, longitudeDegrees, altitudeMeters,
-                                 speedMetersPerSec, bearingDegrees, horizontalAccuracyMeters,
-                                 verticalAccuracyMeters, speedAccuracyMetersPerSecond,
-                                 bearingAccuracyDegrees, timestamp, elapsedRealtimeFlags,
-                                 elapsedRealtimeNanos, elapsedRealtimeUncertaintyNanos);
++                                speedMetersPerSec, bearingDegrees, horizontalAccuracyMeters,
++                                verticalAccuracyMeters, speedAccuracyMetersPerSecond,
++                                bearingAccuracyDegrees, timestamp, elapsedRealtimeFlags,
++                                elapsedRealtimeNanos, elapsedRealtimeUncertaintyNanos);
 +    }
  }