系统版本：
RK3288 android 5.1
（与参考的变量和宏有点区别）
设备没有电池，在进行
Fota
升级时，提示电量不能低于
30%
，外接电源，可是读出来的电量是
0%
，无法进行升级，只能手动设置电池电量。
$ adb shell dumpsys battery
//
通过
adb
查询电池信息
Current Battery Service state:
AC powered: false
USB powered: false
Wireless powered: false
status: 1
health: 1
present: true
level: 0
//
电池电量
scale: 100
voltage: 0
temperature: 0
technology:
diff –git a/system/core/healthd/BatteryMonitor.cpp b/system/core/healthd/BatteryMonitor.cpp
old mode
100644
new
mode
100755
index d317b28..6b37dee
— a/system/core/healthd/BatteryMonitor.cpp
+++ b/system/core/healthd/BatteryMonitor.cpp
@@ –
35
,
7
+
35
,
7
@@
#define
POWER_SUPPLY_SUBSYSTEM "power_supply"
#define
POWER_SUPPLY_SYSFS_PATH "/sys/class/" POWER_SUPPLY_SUBSYSTEM
–
#define
FAKE_BATTERY_CAPACITY 42
+
#define
FAKE_BATTERY_CAPACITY 100
#define
FAKE_BATTERY_TEMPERATURE 424
namespace
android {
@@ –
513
,
8
+
513
,
14
@@
void
BatteryMonitor::init(
struct
healthd_config *hc) {
closedir(dir);
}
–
if
(!mChargerNames.size())
+
if
(!mChargerNames.size()) {
KLOG_ERROR(LOG_TAG,
"No charger supplies found\n"
);
+
/*————
电池电量一直显示
100%————*/
+ mBatteryFixedCapacity = FAKE_BATTERY_CAPACITY;
//
电量
level
+ mBatteryFixedTemperature = FAKE_BATTERY_TEMPERATURE;
//
温度
temperature
+ mBatteryDevicePresent =
true
;
+
/*————————————————*/
+ }
if
(!mBatteryDevicePresent) {
KLOG_WARNING(LOG_TAG,
"No battery devices found\n"
);
hc->periodic_chores_interval_fast = –
1
;
$ adb shell dumpsys battery
Current Battery Service state:
AC powered: false
USB powered: false
Wireless powered: false
status: 1
health: 1
present: true
level: 100
//
电池电量
scale: 100
voltage: 0
temperature: 424
technology:
