Talkback问题汇总
2024-06-23 13:36:14
Talkback问题汇总
- 导航页面
- 界面与读屏内容不一致
- 移除引导页面
导航页面
界面与读屏内容不一致
- 现象：界面显示在page2，tts输出内容为page1+page2，返回上一页现象雷同
- 修改
- talkback-master\compositor\src\main\res\raw\compositor.json
"TYPE_VIEW_FOCUSED": {//modify>>>//"ttsOutput": "%event_description","ttsOutput": "","ttsAddToHistory": true,// From FallbackFormatter// TODO: Delete porting comments."earcon": {"if": "$event.sourceIsNull","then": "@raw/focus_actionable"},"haptic": {"if": "$event.sourceIsNull","then": "@array/view_focused_or_selected_pattern"}
},
由于json是全局配置文件，修改有风险，继而java中做判断条件修改
- talkback-master\compositor\src\main\java\com\google\android\accessibility\compositor\Compositor.java
private void handleEvent(int event,@Nullable EventId eventId,ParseTree.VariableDelegate delegate,HandleEventOptions options) {...// custom for training >>>CharSequence ttsOutput ="";if (eventObject!= null) {Log.i(TAG, "handleEvent: " + eventObject.toString());}if (eventObject!= null&& eventObject.getEventType() == AccessibilityEvent.TYPE_VIEW_FOCUSED&& "com.android.talkback".equals(eventObject.getPackageName())){ttsOutput ="";}else {ttsOutput = mParseTree.parseEventToString(event, OUTPUT_TTS_OUTPUT, delegate);}CharSequence ttsOutput = mParseTree.parseEventToString(event, OUTPUT_TTS_OUTPUT, delegate);Log.i(TAG, "handleEvent: ttsOutput="+ttsOutput);...}
- talkback-master\talkback\src\main\java\com\google\android\accessibility\talkback\eventprocessor\ProcessorScreen.java
此处修改可以避免title重复读
@Override
protected boolean allowAnnounce(AccessibilityEvent event) {// If the user performs a cursor control(copy, paste, start selection mode, etc) in the// talkback context menu and lands back to the edit text, a TYPE_WINDOWS_CHANGED and a// TYPE_WINDOW_STATE_CHANGED events will be fired. We should skip these two events to// avoid announcing the window title.boolean allowAnnounce = true;if (event.getEventType() == AccessibilityEvent.TYPE_WINDOWS_CHANGED&& EventState.getInstance().checkAndClearRecentFlag(EventState.EVENT_SKIP_WINDOWS_CHANGED_PROCESSING_AFTER_CURSOR_CONTROL)) {allowAnnounce = false;}if (event.getEventType() == AccessibilityEvent.TYPE_WINDOW_STATE_CHANGED&& EventState.getInstance().checkAndClearRecentFlag(EventState.EVENT_SKIP_WINDOW_STATE_CHANGED_PROCESSING_AFTER_CURSOR_CONTROL)) {allowAnnounce = false;}Log.i(TAG, "allowAnnounce: "+allowAnnounce);//modify>>>>>if (WindowUtils.rootChildMatchesResId(service, TrainingActivity.ROOT_RES_ID)){Log.i(TAG, "allowAnnounce: is TrainingActivity>>>");allowAnnounce = false;}return allowAnnounce;
}
- talkback-master\talkback\src\main\java\com\google\android\accessibility\talkback\training\TrainingFragment.java
修改后辅助功能的焦点框会直接选中界面外布局而非内部子布局
@Overridepublic View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedState) {final View view = inflater.inflate(R.layout.training_fragment_name, container, false);pageLayout = view.findViewById(R.id.training_page);@Nullable PageId pageId = (PageId) getArguments().get(EXTRA_PAGE);if (pageId == null) {LogUtils.e(TAG, "Cannot create view because no page ID.");return view;}page = PageConfig.getPage(pageId);if (page == null) {LogUtils.e(TAG, "Cannot create view because unknown PageId. [%s]", pageId.name());return view;}addView(inflater, container);//modify>>>>>//pageLayout.setImportantForAccessibility(IMPORTANT_FOR_ACCESSIBILITY_AUTO);pageLayout.setImportantForAccessibility(IMPORTANT_FOR_ACCESSIBILITY_NO_HIDE_DESCENDANTS);if (FeatureSupport.isWatch(getContext())) {// Support rotary input.view.requestFocus();}return view;}
- talkback-master\talkback\src\main\java\com\google\android\accessibility\talkback\utils\DiagnosticOverlayControllerImpl.java
以上修改后在返回上一页时会出现辅助功能的焦点框丢失，继而添加以下修改
/*** Receives and appends Feedback object to log controller. Feedback objects are filtered for swipe* gestures.*/public void appendLog(Feedback feedback) {Feedback.@Nullable Part failover =(feedback.failovers() == null || feedback.failovers().size() < 1? null: feedback.failovers().get(0));if (failover == null) {return;}// Filter for FOCUS and FOCUS DIRECTION actions,// which mark beg/end of swipe gesture + associated focusif (failover.focus() == null&& failover.focusDirection() == null&& failover.scroll() == null) {return;}/** Check to make sure eventID isn't null before checking for gestures */if (!this.enabled|| feedback.eventId() == null|| highlightOverlay == null|| diagnosticOverlay == null) {return;}/*** Clear/recycle traversed/unfocused nodes when window changes/scrolls to new screen because* usually {@link FocusProcessorForLogicalNavigation} tells when clear/recycle, but with new* screen change/scroll, we must call {@link* DiagnosticOverlayControllerImpl#clearAndRecycleCollectionNodes} from here*/if (feedback.eventId().getEventSubtype() == AccessibilityEvent.TYPE_WINDOWS_CHANGED|| feedback.eventId().getEventSubtype() == AccessibilityEvent.TYPE_WINDOW_STATE_CHANGED|| failover.scroll() != null) {Log.i(TAG, "appendLog: >>>>>>>>>>>>>>>>>>>>>>");//modify>>>>>需要添加判断条件//clearAndRecycleCollectionNodes(/* recycleFocusedNode= */ false);//highlightOverlay.clearHighlight();}
移除引导页面
找到对应的显示界面数组后跟踪，修改：
talkback-master\talkback\src\main\java\com\google\android\accessibility\talkback\TalkBackService.java
@Override
protected void onServiceConnected() {LogUtils.v(TAG, "System bound to service.");...//modify>>>>if (false && !FeatureSupport.isTv(getApplicationContext())&& !FeatureSupport.isWatch(getApplicationContext())) {OnboardingInitiator.showOnboarding91IfNecessary(this);}...
}
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