原生代码的位置

首先直接给出代码位置：
frameworks/base/packages/SystemUI/src/com/android/systemui/statusbar/phone/QuickSettings.java 第507行

        // Battery
        final QuickSettingsTileView batteryTile = (QuickSettingsTileView)
                inflater.inflate(R.layout.quick_settings_tile, parent, false);
        batteryTile.setContent(R.layout.quick_settings_tile_battery, inflater);
        batteryTile.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                startSettingsActivity(Intent.ACTION_POWER_USAGE_SUMMARY);
            }
        });
        mModel.addBatteryTile(batteryTile, new QuickSettingsModel.RefreshCallback() {
            @Override
            public void refreshView(QuickSettingsTileView unused, State state) {
                QuickSettingsModel.BatteryState batteryState =
                        (QuickSettingsModel.BatteryState) state;
                String t;
                if (batteryState.batteryLevel == 100) {
                    t = mContext.getString(R.string.quick_settings_battery_charged_label);
                } else {
                    t = batteryState.pluggedIn
                        ? mContext.getString(R.string.quick_settings_battery_charging_label,
                                batteryState.batteryLevel)
                        : mContext.getString(R.string.status_bar_settings_battery_meter_format,
                                batteryState.batteryLevel);
                }
                ((TextView)batteryTile.findViewById(R.id.text)).setText(t);
                batteryTile.setContentDescription(
                        mContext.getString(R.string.accessibility_quick_settings_battery, t));
            }
        });
        parent.addView(batteryTile);

直接注释掉parent.addView(batteryTile); 就好了。

非原厂代码

我现在手上这部分是非原厂代码，它的大体代码如下：

    private final boolean hasNoBattery = "true".equals(SystemProperties.get("ro.factory.without_battery", "false"));
    ...
        if(!hasNoBattery){
        final QuickSettingsTileView batteryTile = (QuickSettingsTileView)
                inflater.inflate(R.layout.quick_settings_tile, parent, false);
        batteryTile.setContent(R.layout.quick_settings_tile_battery, inflater);
        batteryTile.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                startSettingsActivity(Intent.ACTION_POWER_USAGE_SUMMARY);
            }
        });
        mModel.addBatteryTile(batteryTile, new QuickSettingsModel.RefreshCallback() {
            @Override
            public void refreshView(QuickSettingsTileView unused, State state) {
                QuickSettingsModel.BatteryState batteryState =
                        (QuickSettingsModel.BatteryState) state;
                String t;
                if (batteryState.batteryLevel == 100) {
                    t = mContext.getString(R.string.quick_settings_battery_charged_label);
                } else {
                    t = batteryState.pluggedIn
                        ? mContext.getString(R.string.quick_settings_battery_charging_label,
                                batteryState.batteryLevel)
                        : mContext.getString(R.string.status_bar_settings_battery_meter_format,
                                batteryState.batteryLevel);
                }
                ((TextView)batteryTile.findViewById(R.id.text)).setText(t);
                batteryTile.setContentDescription(
                        mContext.getString(R.string.accessibility_quick_settings_battery, t));
            }
        });
        parent.addView(batteryTile);
        }

增加了ro.factory.without_battery这个属性，那都有谁会对这个属性感兴趣呢？

./base/packages/Keyguard/src/com/android/keyguard/KeyguardMessageArea.java:59: private final boolean hasNoBattery = "true".equals(SystemProperties.get("ro.factory.without_battery", "false"));
./base/packages/SystemUI/src/com/android/systemui/BatteryMeterView.java:72: private final boolean hasNoBattery = "true".equals(SystemProperties.get("ro.factory.without_battery", "false"));
./base/packages/SystemUI/src/com/android/systemui/statusbar/phone/QuickSettingsModel.java:64: private final boolean hasNoBattery = "true".equals(SystemProperties.get("ro.factory.without_battery", "false"));
./base/packages/SystemUI/src/com/android/systemui/statusbar/phone/PhoneStatusBar.java:2906: private final boolean hasNoBattery = "true".equals(SystemProperties.get("ro.factory.without_battery", "false"));
./base/packages/SystemUI/src/com/android/systemui/statusbar/phone/PhoneStatusBarTransitions.java:39: private final boolean hasNoBattery = "true".equals(SystemProperties.get("ro.factory.without_battery", "false"));
./base/packages/SystemUI/src/com/android/systemui/statusbar/phone/QuickSettings.java:110: private final boolean hasNoBattery = "true".equals(SystemProperties.get("ro.factory.without_battery", "false"));

可以看到全部都是对 hasNoBattery 做判断的，再找找hasNoBattery这个关键字的用法。

./base/packages/Keyguard/src/com/android/keyguard/KeyguardMessageArea.java:227:        if(!hasNoBattery) setText(status);
./base/packages/SystemUI/src/com/android/systemui/statusbar/phone/QuickSettingsModel.java:607:        if(hasNoBattery) return;
./base/packages/SystemUI/src/com/android/systemui/statusbar/phone/QuickSettingsModel.java:613:        if(hasNoBattery) return;
./base/packages/SystemUI/src/com/android/systemui/statusbar/phone/PhoneStatusBar.java:2929:            if(!hasNoBattery)
./base/packages/SystemUI/src/com/android/systemui/statusbar/phone/PhoneStatusBarTransitions.java:107:            if(!hasNoBattery) mBattery.setAlpha(newAlphaBC);
./base/packages/SystemUI/src/com/android/systemui/statusbar/phone/QuickSettings.java:509:        if(!hasNoBattery){
./base/packages/SystemUI/src/com/android/systemui/BatteryMeterView.java:91:            if(hasNoBattery) return;
./base/packages/SystemUI/src/com/android/systemui/BatteryMeterView.java:153:        if(hasNoBattery) return;
./base/packages/SystemUI/src/com/android/systemui/BatteryMeterView.java:167:        if(hasNoBattery) return;
./base/packages/SystemUI/src/com/android/systemui/BatteryMeterView.java:248:        if(hasNoBattery) return;
./base/packages/SystemUI/src/com/android/systemui/BatteryMeterView.java:267:        if(hasNoBattery) return;
./base/packages/SystemUI/src/com/android/systemui/BatteryMeterView.java:373:        if(hasNoBattery) return;

现在你知道如果你的机器没有电池的话都应该改AOSP的哪些地方了，具体的方式我就不多说了，直接修改就好了。