【移动应用开发技术】怎么在Android 8.0中实现慢充和快充提示语

【移动应用开发技术】怎么在Android8.0中实现慢充和快充提示语

今天就跟大家聊聊有关怎么在Android8.0中实现慢充和快充提示语，可能很多人都不太了解，为了让大家更加了解，在下给大家总结了以下内容，希望大家根据这篇文章可以有所收获。1.慢充和快充提示语\frameworks\base\packages\SystemUI\res-keyguard\values-zh-rCN中文提示语<string

name="keyguard_plugged_in"

msgid="89308975354638682">"正在充电"</string>

<string

name="keyguard_plugged_in_charging_fast"

msgid="8869226755413795173">"正在快速充电"</string>

<string

name="keyguard_plugged_in_charging_slowly"

msgid="6637043106038550407">"正在慢速充电"</string>英文提示语\frameworks\base\packages\SystemUI\res-keyguard\values1.快充充电器充电-显示快速充电字符串<!--

When

the

lock

screen

is

showing

and

the

phone

plugged

in,

and

the

battery

is

not

fully

charged,

and

it's

plugged

into

a

fast

charger,

say

that

it's

charging

fast.

-->

<string

name="keyguard_plugged_in_charging_fast">Charging

rapidly</string>2.普通充电电器-显示充电，该同7.0及其以前特性<!--

When

the

lock

screen

is

showing

and

the

phone

plugged

in,

and

the

battery

is

not

fully

charged,

say

that

it's

charging.

-->

<string

name="keyguard_plugged_in">Charging</string>3.电脑端或者笔记本端显示-缓慢充电<!--

When

the

lock

screen

is

showing

and

the

phone

plugged

in,

and

the

battery

is

not

fully

charged,

and

it's

plugged

into

a

slow

charger,

say

that

it's

charging

slowly.

-->

<string

name="keyguard_plugged_in_charging_slowly">Charging

slowly</string>2.原理根据当前的最大电压和电流计算出电流速度，并进行分类为慢速充电，充电，快速充电2.1源代码中的原始数据•public

static

final

String

EXTRA_MAX_CHARGING_CURRENT

=

“max_charging_current”;

•public

static

final

String

EXTRA_MAX_CHARGING_VOLTAGE

=

“max_charging_voltage”;发送“电池广播”位置将最大电流和电压上发应用层，这里主要一些8.1以上新增的数据，7.0以前有这个数据但是framework层没有使用frameworks/base/services/core/java/com/android/server/BatteryService.java

//

发送电池广播事件

private

void

sendIntentLocked()

{

//

Pack

up

the

values

and

broadcast

them

to

everyone

final

Intent

intent

=

new

Intent(Intent.ACTION_BATTERY_CHANGED);

intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY

|

Intent.FLAG_RECEIVER_REPLACE_PENDING);

intent.putExtra(BatteryManager.EXTRA_MAX_CHARGING_CURRENT,

mBatteryProps.maxChargingCurrent);

intent.putExtra(BatteryManager.EXTRA_MAX_CHARGING_VOLTAGE,

mBatteryProps.maxChargingVoltage);2.2adbshell查看linux的文件节点•获取当前的电流adb

shell

cat

/sys/class/power_supply/battery/current_max

adb

shell

cat

/sys/class/power_supply/battery/current_max

30000001•获取当前的电压adb

shell

cat

/sys/class/power_supply/battery/voltage_max

adb

shell

cat

/sys/class/power_supply/battery/voltage_max

50000001•具体源码system/core/healthd/BatteryMonitor.cpp

#define

POWER_SUPPLY_SYSFS_PATH

"/sys/class/"

POWER_SUPPLY_SUBSYSTEM

path.appendFormat("%s/%s/voltage_max",

POWER_SUPPLY_SYSFS_PATH,mChargerNames[i].string());2.3上层接收广播frameworks/base/packages/SystemUI/src/com/android/keyguard/KeyguardUpdateMonitor.java重点看maxChargingMicroAmp和maxChargingMicroVolt的算法规则private

final

BroadcastReceiver

mBroadcastReceiver

=

new

BroadcastReceiver()

{

}

else

if

(Intent.ACTION_BATTERY_CHANGED.equals(action))

{

final

int

status

=

intent.getIntExtra(EXTRA_STATUS,

BATTERY_STATUS_UNKNOWN);

final

int

plugged

=

intent.getIntExtra(EXTRA_PLUGGED,

0);

final

int

level

=

intent.getIntExtra(EXTRA_LEVEL,

0);

final

int

health

=

intent.getIntExtra(EXTRA_HEALTH,

BATTERY_HEALTH_UNKNOWN);

final

int

maxChargingMicroAmp

=

intent.getIntExtra(EXTRA_MAX_CHARGING_CURRENT,

-1);

int

maxChargingMicroVolt

=

intent.getIntExtra(EXTRA_MAX_CHARGING_VOLTAGE,

-1);

final

int

maxChargingMicroWatt;

if

(maxChargingMicroVolt

<=

0)

{

maxChargingMicroVolt

=

DEFAULT_CHARGING_VOLTAGE_MICRO_VOLT;

}

if

(maxChargingMicroAmp

>

0)

{

//

Calculating

muW

=

muA

*

muV

/

(10^6

mu^2

/

mu);

splitting

up

the

divisor

//

to

maintain

precision

equally

on

both

factors.

maxChargingMicroWatt

=

(maxChargingMicroAmp

/

1000)

*

(maxChargingMicroVolt

/

1000);

}

else

{

maxChargingMicroWatt

=

-1;

}

final

Message

msg

=

mHandler.obtainMessage(

MSG_BATTERY_UPDATE,

new

BatteryStatus(status,

level,

plugged,

health,

maxChargingMicroWatt));

mHandler.sendMessage(msg);2.4显示字符串frameworks/base/packages/SystemUI/src/com/android/systemui/statusbar/KeyguardIndicationController.java事件接收protected

class

BaseKeyguardCallback

extends

KeyguardUpdateMonitorCallback

{

public

static

final

int

HIDE_DELAY_MS

=

5000;

private

int

mLastSuccessiveErrorMessage

=

-1;

@Override

public

void

onRefreshBatteryInfo(KeyguardUpdateMonitor.BatteryStatus

status)

{

boolean

isChargingOrFull

=

status.status

==

BatteryManager.BATTERY_STATUS_CHARGING

||

status.status

==

BatteryManager.BATTERY_STATUS_FULL;

boolean

wasPluggedIn

=

mPowerPluggedIn;

mPowerPluggedIn

=

status.isPluggedIn()

&&

isChargingOrFull;

mPowerCharged

=

status.isCharged();

mChargingWattage

=

status.maxChargingWattage;

mChargingSpeed

=

status.getChargingSpeed(mSlowThreshold,

mFastThreshold);

updateIndication();

if

(mDozing)

{

if

(!wasPluggedIn

&&

mPowerPluggedIn)

{

showTransientIndication(computePowerIndication());

hideTransientIndicationDelayed(HIDE_DELAY_MS);

}

else

if

(wasPluggedIn

&&

!mPowerPluggedIn)

{

hideTransientIndication();

}

}

}

=====================================================================================================

public

static

class

BatteryStatus

{

public

static

final

int

CHARGING_UNKNOWN

=

-1;

public

static

final

int

CHARGING_SLOWLY

=

0;

public

static

final

int

CHARGING_REGULAR

=

1;

public

static

final

int

CHARGING_FAST

=

2;

public

final

int

status;

public

final

int

level;

public

final

int

plugged;

public

final

int

health;

public

final

int

maxChargingWattage;

public

BatteryStatus(int

status,

int

level,

int

plugged,

int

health,

int

maxChargingWattage)

{

this.status

=

status;

this.level

=

level;

this.plugged

=

plugged;

this.health

=

health;

this.maxChargingWattage

=

maxChargingWattage;

}

public

final

int

getChargingSpeed(int

slowThreshold,

int

fastThreshold)

{

return

maxChargingWattage

<=

0

?

CHARGING_UNKNOWN

:

maxChargingWattage

<

slowThreshold

?

CHARGING_SLOWLY

:

maxChargingWattage

>

fastThreshold

?

CHARGING_FAST

:

CHARGING_REGULAR;

}显示字符串frameworks/base/packages/SystemUI/src/com/android/systemui/statusbar/KeyguardIndicationCon