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To query for the current state of a fence, callFenceClient.queryFences()and pass the fence key for the fence to query.
The following example callsFenceClient.queryFences()to get aFenceStateMap,
and then uses theFenceStateMapto return aFenceStatevalue to show the current state, previous state, and the time when the fence was
last updated:
protectedvoidqueryFence(finalStringfenceKey){Awareness.getFenceClient(this).queryFences(FenceQueryRequest.forFences(Arrays.asList(fenceKey))).addOnSuccessListener(newOnSuccessListener<FenceQueryResponse>(){@OverridepublicvoidonSuccess(FenceQueryResponseresponse){FenceStateMapmap=response.getFenceStateMap();for(StringfenceKey:map.getFenceKeys()){FenceStatefenceState=map.getFenceState(fenceKey);Log.i(TAG,"Fence "+fenceKey+": "+fenceState.getCurrentState()+", was="+fenceState.getPreviousState()+", lastUpdateTime="+DATE_FORMAT.format(newDate(fenceState.getLastFenceUpdateTimeMillis())));}}}).addOnFailureListener(newOnFailureListener(){@OverridepublicvoidonFailure(@NonNullExceptione){Log.e(TAG,"Could not query fence: "+fenceKey);return;}});}
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Missing the information I need","missingTheInformationINeed","thumb-down"],["Too complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-09-04 UTC."],[[["\u003cp\u003eUse \u003ccode\u003eFenceClient.queryFences()\u003c/code\u003e to get the current state of a fence by providing its fence key.\u003c/p\u003e\n"],["\u003cp\u003eThe \u003ccode\u003equeryFences()\u003c/code\u003e method returns a \u003ccode\u003eFenceStateMap\u003c/code\u003e containing the state of the queried fences.\u003c/p\u003e\n"],["\u003cp\u003e\u003ccode\u003eFenceState\u003c/code\u003e objects within the map provide the current, previous state, and last update time of each fence.\u003c/p\u003e\n"],["\u003cp\u003eThe provided code example demonstrates querying for a fence's state and logging its details.\u003c/p\u003e\n"]]],[],null,["# Query for fence state\n\nTo query for the current state of a fence, call\n[`FenceClient.queryFences()`](/android/reference/com/google/android/gms/awareness/FenceClient#public-taskfencequeryresponse-queryfences-fencequeryrequest-fencequeryrequest) and pass the fence key for the fence to query.\n\nThe following example calls `FenceClient.queryFences()` to get a `FenceStateMap`,\nand then uses the `FenceStateMap` to return a\n[`FenceState`](/android/reference/com/google/android/gms/awareness/fence/FenceState)\nvalue to show the current state, previous state, and the time when the fence was\nlast updated: \n\n protected void queryFence(final String fenceKey) {\n Awareness.getFenceClient(this)\n .queryFences(FenceQueryRequest.forFences(Arrays.asList(fenceKey)))\n .addOnSuccessListener(new OnSuccessListener\u003cFenceQueryResponse\u003e() {\n @Override\n public void onSuccess(FenceQueryResponse response) {\n FenceStateMap map = response.getFenceStateMap();\n for (String fenceKey : map.getFenceKeys()) {\n FenceState fenceState = map.getFenceState(fenceKey);\n Log.i(TAG, \"Fence \" + fenceKey + \": \"\n + fenceState.getCurrentState()\n + \", was=\"\n + fenceState.getPreviousState()\n + \", lastUpdateTime=\"\n + DATE_FORMAT.format(\n new Date(fenceState.getLastFenceUpdateTimeMillis())));\n }\n }\n })\n .addOnFailureListener(new OnFailureListener() {\n @Override\n public void onFailure(@NonNull Exception e) {\n Log.e(TAG, \"Could not query fence: \" + fenceKey);\n return;\n }\n });\n }"]]
