1. 慢充和快充提示语
\frameworks\base\packages\SystemUI\res-keyguard\values-zh-rCN
中文提示语
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<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\values
1.快充充电器充电-显示快速充电字符串
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<!-- 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
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<!-- 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
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<!-- 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
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•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
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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); |
2.2 adb shell 查看linux的文件节点
•获取当前的电流
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adb shell cat /sys/class/power_supply/battery/current_maxadb shell cat /sys/class/power_supply/battery/current_max30000001 |
•获取当前的电压
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adb shell cat /sys/class/power_supply/battery/voltage_maxadb shell cat /sys/class/power_supply/battery/voltage_max50000001 |
•具体源码
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system/core/healthd/BatteryMonitor.cpp#define POWER_SUPPLY_SYSFS_PATH "/sys/class/" POWER_SUPPLY_SUBSYSTEMpath.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
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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
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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
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frameworks/base/packages/SystemUI/src/com/android/systemui/statusbar/KeyguardIndicationController.java int chargingId; switch (mChargingSpeed) { case KeyguardUpdateMonitor.BatteryStatus.CHARGING_FAST: chargingId = hasChargingTime ? R.string.keyguard_indication_charging_time_fast : R.string.keyguard_plugged_in_charging_fast; break; case KeyguardUpdateMonitor.BatteryStatus.CHARGING_SLOWLY: chargingId = hasChargingTime ? R.string.keyguard_indication_charging_time_slowly : R.string.keyguard_plugged_in_charging_slowly; break; default: chargingId = hasChargingTime ? R.string.keyguard_indication_charging_time : R.string.keyguard_plugged_in; break; } |
总结
以上所述是小编给大家介绍的Android 8.0 慢充和快充提示语的实现原理，希望对大家有所帮助，如果大家有任何疑问请给我留言，小编会及时回复大家的。在此也非常感谢大家对服务器之家网站的支持！
原文链接：https://blog.csdn.net/su749520/article/details/80346310
