Android13默认开启电池百分比数字显示Framework
有个小需求，需要实现。
查了很多平台，就是没有Android13的。
通过查阅Framework代码。终于找到了如何默认显示。
QSSI.13/frameworks/base/packages/SystemUI/src/com/android/systemui/battery/BatteryMeterView.java
void updateShowPercent() {final boolean showing = mBatteryPercentView != null;// TODO(b/140051051)final boolean systemSetting = 0 != whitelistIpcs(() -> Settings.System.getIntForUser(getContext().getContentResolver(),SHOW_BATTERY_PERCENT, 1, UserHandle.USER_CURRENT)); //修改 0 为不显示数字， 1 为显示数字。boolean shouldShow = (mShowPercentAvailable && systemSetting && mShowPercentMode != MODE_OFF)|| mShowPercentMode == MODE_ON|| mShowPercentMode == MODE_ESTIMATE;shouldShow = shouldShow && !mBatteryStateUnknown;if (shouldShow) {if (!showing) {mBatteryPercentView = loadPercentView();if (mPercentageStyleId != 0) { // Only set if specified as attributemBatteryPercentView.setTextAppearance(mPercentageStyleId);}if (mTextColor != 0)mBatteryPercentView.setTextColor(mTextColor);updatePercentText();addView(mBatteryPercentView,new ViewGroup.LayoutParams(LayoutParams.WRAP_CONTENT,LayoutParams.MATCH_PARENT));}} else {if (showing) {removeView(mBatteryPercentView);mBatteryPercentView = null;}}}
QSSI.13/packages/apps/Settings/src/com/android/settings/display/BatteryPercentagePreferenceController.java
@Overridepublic void updateState(Preference preference) {int setting = Settings.System.getInt(mContext.getContentResolver(),SHOW_BATTERY_PERCENT, 1); // 0 为不显示数字， 1为显示数字((SwitchPreference) preference).setChecked(setting == 1);}修改2个地方，一个是Setting，一个是SystemUI显示。
通过，0，1 的切换，可以修改默认显示电池数字百分比，或不显示电池数字百分比的效果。