Android O 修改吉字节为GB

中文状态下，流量使用、存储容量等位置的单位为中文表述：字节、吉字节、兆字节。需要将其改为 B、GB、MB 等。

1.修改流量使用单位

package/apps/Settings/src/com/android/settings/datausage/DataUsagePreference.java

  @Overridepublic void setTemplate(NetworkTemplate template, int subId,NetworkServices services) {mTemplate = template;mSubId = subId;DataUsageController controller = new DataUsageController(getContext());DataUsageController.DataUsageInfo usageInfo = controller.getDataUsageInfo(mTemplate);setSummary(getContext().getString(R.string.data_usage_template,Formatter.formatFileSize(getContext(), usageInfo.usageLevel), usageInfo.period));setIntent(getIntent());}

frameworks/base/core/java/android/text/format/Formatter.java

  private static String formatRoundedBytesResult(@NonNull Context context, @NonNull RoundedBytesResult input) {//add for change 吉字节 to GB      final Locale locale = /*localeFromContext(context)*/Locale.US;//add endfinal NumberFormat numberFormatter = getNumberFormatter(locale, input.fractionDigits);if (input.units == MeasureUnit.BYTE || input.units == PETABYTE) {// ICU spells out "byte" instead of "B", and can't format petabytes yet.final String formattedNumber = numberFormatter.format(input.value);return context.getString(com.android.internal.R.string.fileSizeSuffix,formattedNumber, getSuffixOverride(context.getResources(), input.units));} else {return formatMeasureShort(locale, numberFormatter, input.value, input.units);}}/** {@hide} */public static BytesResult formatBytes(Resources res, long sizeBytes, int flags) {final RoundedBytesResult rounded = RoundedBytesResult.roundBytes(sizeBytes, flags);// add for change 吉字节 to GB   final Locale locale = /*res.getConfiguration().getLocales().get(0)*/Locale.US;// add endfinal NumberFormat numberFormatter = getNumberFormatter(locale, rounded.fractionDigits);final String formattedNumber = numberFormatter.format(rounded.value);final String units;if (rounded.units == MeasureUnit.BYTE || rounded.units == PETABYTE) {// ICU spells out "byte" instead of "B", and can't format petabytes yet.units = getSuffixOverride(res, rounded.units);} else { // Since ICU does not give us access to the pattern, we need to extract the unit string// from ICU, which we do by taking out the formatted number out of the formatted string// and trimming the result of spaces and controls.final String formattedMeasure = formatMeasureShort(locale, numberFormatter, rounded.value, rounded.units);final String numberRemoved = deleteFirstFromString(formattedMeasure, formattedNumber);units = SPACES_AND_CONTROLS.trim(numberRemoved).toString();}return new BytesResult(formattedNumber, units, rounded.roundedBytes);}

2.修改存储容量单位

package/apps/Settings/src/com/android/settings/deviceinfo/PrivateVolumeSettings.java

  // 不同类型标签private static final int[] ITEMS_SHOW_SHARED = new int[] {R.string.storage_detail_apps,R.string.storage_detail_images,R.string.storage_detail_videos,R.string.storage_detail_audio,R.string.storage_detail_system,R.string.storage_detail_other,};...private void addDetailItems(PreferenceGroup category, boolean showShared, int userId) {final int[] itemsToAdd = (showShared ? ITEMS_SHOW_SHARED : ITEMS_NO_SHOW_SHARED);for (int i = 0; i < itemsToAdd.length; ++i) {addItem(category, itemsToAdd[i], null, userId);}}private void addItem(PreferenceGroup group, int titleRes, CharSequence title, int userId) {if (titleRes == R.string.storage_detail_system) {if (mSystemSize <= 0) {Log.w(TAG, "Skipping System storage because its size is " + mSystemSize);return;}if (userId != UserHandle.myUserId()) {// Only display system on current user.return;}}StorageItemPreference item;if (mItemPoolIndex < mItemPreferencePool.size()) {item = mItemPreferencePool.get(mItemPoolIndex);} else {item = buildItem();mItemPreferencePool.add(item);}if (title != null) {item.setTitle(title);item.setKey(title.toString());} else {item.setTitle(titleRes);item.setKey(Integer.toString(titleRes));}item.setSummary(R.string.memory_calculating_size);item.userHandle = userId;addPreference(group, item);  //全部添加到布局中++mItemPoolIndex;}

追踪下来可以知道，这些标签都是StorageItemPreference

package/apps/Settings/src/com/android/settings/deviceinfo/StorageItemPreference.java

  public void setStorageSize(long size, long total) {setSummary(FileSizeFormatter.formatFileSize(getContext(),size,MeasureUnit.GIGABYTE,FileSizeFormatter.GIGABYTE_IN_BYTES));if (total == 0) {mProgressPercent = 0;} else {mProgressPercent = (int)(size * PROGRESS_MAX / total);}updateProgressBar();}

更新Summary有调用到FileSizeFormatter中的formatFileSize方法

package/apps/Settings/src/com/android/settings/utils/FileSizeFormatter.java

  private static String formatRoundedBytesResult(@NonNull Context context, @NonNull RoundedBytesResult input) {// add for change 吉字节 to GB   final Locale locale = /*localeFromContext(context)*/Locale.US;// add endfinal NumberFormat numberFormatter = getNumberFormatter(locale, input.fractionDigits);return formatMeasureShort(locale, numberFormatter, input.value, input.units);}public static String formatFileSize(@Nullable Context context, long sizeBytes, MeasureUnit unit, long mult) {if (context == null) {return "";}final RoundedBytesResult res = formatBytes(sizeBytes, unit, mult);return bidiWrap(context, formatRoundedBytesResult(context, res));}

Android O 里的网络流量使用、存储容量这两处位置的单位显示并非使用了不同语言的 values，而是使用了 Formatter 类来控制修改。

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Android O 修改吉字节为GB

1.修改流量使用单位

2.修改存储容量单位

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