diff --git a/.gradle/6.7.1/executionHistory/executionHistory.bin b/.gradle/6.7.1/executionHistory/executionHistory.bin
index 00cb28b..9da4508 100644
Binary files a/.gradle/6.7.1/executionHistory/executionHistory.bin and b/.gradle/6.7.1/executionHistory/executionHistory.bin differ
diff --git a/.gradle/6.7.1/executionHistory/executionHistory.lock b/.gradle/6.7.1/executionHistory/executionHistory.lock
index 4ebe675..535dc3b 100644
Binary files a/.gradle/6.7.1/executionHistory/executionHistory.lock and b/.gradle/6.7.1/executionHistory/executionHistory.lock differ
diff --git a/.gradle/6.7.1/fileHashes/fileHashes.bin b/.gradle/6.7.1/fileHashes/fileHashes.bin
index fc8cbf8..5fc39f4 100644
Binary files a/.gradle/6.7.1/fileHashes/fileHashes.bin and b/.gradle/6.7.1/fileHashes/fileHashes.bin differ
diff --git a/.gradle/6.7.1/fileHashes/fileHashes.lock b/.gradle/6.7.1/fileHashes/fileHashes.lock
index e5842a0..1257bf3 100644
Binary files a/.gradle/6.7.1/fileHashes/fileHashes.lock and b/.gradle/6.7.1/fileHashes/fileHashes.lock differ
diff --git a/.gradle/6.7.1/javaCompile/classAnalysis.bin b/.gradle/6.7.1/javaCompile/classAnalysis.bin
index 5252d4f..4fe4960 100644
Binary files a/.gradle/6.7.1/javaCompile/classAnalysis.bin and b/.gradle/6.7.1/javaCompile/classAnalysis.bin differ
diff --git a/.gradle/6.7.1/javaCompile/javaCompile.lock b/.gradle/6.7.1/javaCompile/javaCompile.lock
index 8d9e9fc..eb017e7 100644
Binary files a/.gradle/6.7.1/javaCompile/javaCompile.lock and b/.gradle/6.7.1/javaCompile/javaCompile.lock differ
diff --git a/.gradle/6.7.1/javaCompile/taskHistory.bin b/.gradle/6.7.1/javaCompile/taskHistory.bin
index b637186..6d75895 100644
Binary files a/.gradle/6.7.1/javaCompile/taskHistory.bin and b/.gradle/6.7.1/javaCompile/taskHistory.bin differ
diff --git a/.gradle/buildOutputCleanup/buildOutputCleanup.lock b/.gradle/buildOutputCleanup/buildOutputCleanup.lock
index 95e4e06..bf8b315 100644
Binary files a/.gradle/buildOutputCleanup/buildOutputCleanup.lock and b/.gradle/buildOutputCleanup/buildOutputCleanup.lock differ
diff --git a/.gradle/buildOutputCleanup/outputFiles.bin b/.gradle/buildOutputCleanup/outputFiles.bin
index 7d0584a..613ef72 100644
Binary files a/.gradle/buildOutputCleanup/outputFiles.bin and b/.gradle/buildOutputCleanup/outputFiles.bin differ
diff --git a/.idea/modules/app/WhiteBoard-SDK.app.iml b/.idea/modules/app/WhiteBoard-SDK.app.iml
index ca39e8b..5503679 100644
--- a/.idea/modules/app/WhiteBoard-SDK.app.iml
+++ b/.idea/modules/app/WhiteBoard-SDK.app.iml
@@ -31,7 +31,7 @@
         </compilerSettings>
         <compilerArguments>
           <option name="destination" value="$MODULE_DIR$/../../../app/build/tmp/kotlin-classes/debug" />
-          <option name="classpath" value="$USER_HOME$/.gradle/caches/transforms-2/files-2.1/647050df4529753a167923089c587ad0/jetified-qndroid-rtc-4.0.1-beta.2.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/61f368d8c45af07078af96be5fb469a0/databinding-adapters-4.1.3-api.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/d235e78cac757e4ab925db84a2cb8ddd/databinding-runtime-4.1.3-api.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/200e515765875a657b104fbebf5b2347/jetified-viewbinding-4.1.3-api.jar:/home/mjl/.gradle/caches/modules-2/files-2.1/androidx.databinding/databinding-common/4.1.3/38c07effff5b5a85e4a340086efcea530695cc1c/databinding-common-4.1.3.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/75db3b4617aad1ab58e047454302ef2c/jetified-activity-ktx-1.2.1-api.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/3d171073c025738b457fb72d74b59061/jetified-core-ktx-1.3.2-api.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/0f7b3bd2461d6a099627a4c66ad24834/material-1.2.1-api.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/52e61e813cb44803c1ce78504b8f5ee2/constraintlayout-2.0.4-api.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/121786d19d0c3e49fd7732adc0b9e82b/jetified-zxing-library-2.2-api.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/a45951f5e66547291c4e75545de848a8/jetified-alertdialog-appcompat-debug-api.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/0ebec2fb32490bc79065cb6ba04fe975/appcompat-1.2.0-api.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/1fdff1f9277a526cc34f8102cf44e49e/jetified-viewpager2-1.0.0-api.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/bcbeefce49ccd2dbb8600a71dd7d690b/jetified-okhttp3-integration-4.12.0-api.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/6d670622e53b980a569d4697cfad92be/jetified-glide-4.12.0-api.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/c410c954003a04a62e16b231634559ae/legacy-support-v4-1.0.0-api.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/2ff87a5b5db1b412025c7e0c4f2adc46/fragment-1.3.0-api.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/6d7b1b0b81d7f3c8e0bcd5cd63e1bf9b/recyclerview-1.2.0-api.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/582d83c475be0e9f5de0dae0707a6222/jetified-appcompat-resources-1.2.0-api.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/dd554853cf873ff9ad56d3816e903758/vectordrawable-animated-1.1.0-api.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/7b443cdb4548757a68ffbfef73e2e82f/vectordrawable-1.1.0-api.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/60063806e3f0becf436f80805d08e20b/legacy-support-core-ui-1.0.0-api.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/1eccad0838b28c1931189d8087563444/drawerlayout-1.0.0-api.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/182addf8afaf14cb8ed9f837dda9ddb1/coordinatorlayout-1.1.0-api.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/faf15fe6b54538de16cadef636d90fe6/transition-1.2.0-api.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/a72240ca6de8ad5273364a526d9a46d0/jetified-activity-1.2.1-api.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/43d022e4dd564d332aeeebeefa1345ad/viewpager-1.0.0-api.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/096f4e6a39189555471ec44d2b645a58/legacy-support-core-utils-1.0.0-api.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/d2418c0d6bbd07fb4a4c3523ad10e7d4/loader-1.0.0-api.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/d1be7b5a52cff15b0ac100c38ae6e5b2/slidingpanelayout-1.0.0-api.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/aba2f984e9f5b1c39268bab3420c93ec/customview-1.0.0-api.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/df7a0a39a2014917058f95a1282d853d/media-1.0.0-api.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/7473b52d8aa52eecafd0936a7e9b349a/swiperefreshlayout-1.0.0-api.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/69a7da78702def2a83fce421e6b692a9/asynclayoutinflater-1.0.0-api.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/eddca5b557a5ac6397bf3bd1e9fe4d7c/core-1.3.2-api.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/c94154fbfba06775174ff6b18b0ac867/jetified-lifecycle-runtime-ktx-2.3.0-api.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/7bb59afb95ab6dea5ccf310b3e7b9499/lifecycle-runtime-2.3.0-api.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/709036f7f8c40c0435853c2d88ca6e74/versionedparcelable-1.1.0-api.jar:/home/mjl/.gradle/caches/modules-2/files-2.1/androidx.collection/collection/1.1.0/1f27220b47669781457de0d600849a5de0e89909/collection-1.1.0.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/af18941f3b8e8e25cf7f2a27894ece30/cursoradapter-1.0.0-api.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/d0f286f2d826febef56524b9d8ca3bd3/cardview-1.0.0-api.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/ef64146c0198e421dfd3f3ed527e0da2/jetified-lifecycle-viewmodel-ktx-2.3.1-api.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/6296859f97920f7ea54e2e3874bc452c/jetified-lifecycle-viewmodel-savedstate-2.3.0-api.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/5904aa0fea91a0437c45fa52e594bbc0/lifecycle-viewmodel-2.3.1-api.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/fd156f0850f55407645a600808a2ba04/jetified-savedstate-ktx-1.1.0-api.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/d6d9f41303092596131233dccabf441b/jetified-savedstate-1.1.0-api.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/6626033fd26ca6d83e52f7643d2054ad/jetified-lifecycle-livedata-ktx-2.3.1-api.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/9a85e0e03244fc2cab1aea6b21fd54a7/lifecycle-livedata-2.3.1-api.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/a10d89f07e32a97d4c6271cae5eec1bb/jetified-lifecycle-livedata-core-ktx-2.3.1-api.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/1ba6a312d295b2a1af3acc40bcfcec31/lifecycle-livedata-core-2.3.1-api.jar:/home/mjl/.gradle/caches/modules-2/files-2.1/androidx.lifecycle/lifecycle-common/2.3.1/fc466261d52f4433863642fb40d12441ae274a98/lifecycle-common-2.3.1.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/59478e191ce5ea17251d347407dc85be/core-runtime-2.1.0-api.jar:/home/mjl/.gradle/caches/modules-2/files-2.1/androidx.arch.core/core-common/2.1.0/b3152fc64428c9354344bd89848ecddc09b6f07e/core-common-2.1.0.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/afab22be1e590fed46daf2abca297727/jetified-gifdecoder-4.12.0-api.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/e2e7ef4bfb2555e5000d84c708f7797e/exifinterface-1.2.0-api.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/b8b9eecadfa976d525f940ed9f6fb8a8/interpolator-1.0.0-api.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/ba2f8f2a2726f286d0c8bb0e82e251c2/documentfile-1.0.0-api.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/cd55aa0bbaf21519a3f1f286a829b8ce/localbroadcastmanager-1.0.0-api.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/9375f0108dcbd5b5f0b2ab6f35cb4bc9/print-1.0.0-api.jar:/home/mjl/.gradle/caches/modules-2/files-2.1/androidx.annotation/annotation/1.1.0/e3a6fb2f40e3a3842e6b7472628ba4ce416ea4c8/annotation-1.1.0.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/eb67109027e49068638c7d0581af4a45/jetified-activities-debug-api.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/c2bf84be279e883fbe1afab8e7aeebb2/jetified-dimensions-debug-api.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/70d894d5bf4f7b66a6dcb1c34670f5a9/jetified-kotlin-stdlib-jdk8-1.4.32.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/aacca68dbc5c6374a1ac6cb7b55310cb/jetified-oss-android-sdk-2.9.6-api.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/0dccf271807ad6e4141144d3ec2ba6ff/jetified-okhttp-4.8.1.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/03727e34460ab7460ccfe0f57f2fa3db/jetified-kotlin-stdlib-jdk7-1.4.32.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/f3621df29ddc0b1bf137136a5c4b7a8b/jetified-kotlinx-coroutines-android-1.4.1.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/c86f90f2e6e7def12e8de6c10e7348e7/jetified-okio-jvm-2.7.0.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/fb91717155e651499e4957e8be1f8143/jetified-kotlinx-coroutines-core-jvm-1.4.1.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/1d21e7357a24531eed89dd6dce0c1383/jetified-kotlin-stdlib-1.4.32.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/f2b58f7990301c750ac42a8fd76e0b18/jetified-kotlin-stdlib-common-1.4.32.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/94cd6dd1da1a4576494d489c9b4d3363/jetified-annotations-13.0.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/c10d2c2eab80e0cb1fb3feaa78b3f5b0/jetified-annotation-experimental-1.0.0-api.jar:/home/mjl/.gradle/caches/modules-2/files-2.1/androidx.constraintlayout/constraintlayout-solver/2.0.4/1f001d7db280a89a6c26b26a66eb064bb6d5efeb/constraintlayout-solver-2.0.4.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/b0b82c9e050d776603826645418f372c/jetified-disklrucache-4.12.0.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/f2bdc2ce4420c6c533f18ebe42907557/jetified-annotations-4.12.0.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/96a4ac374f7bc9c5f28bf7c863450b29/jetified-happy-dns-0.2.17.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/d5bd2eae35bc046fa1d1c07fcc17e970/jetified-crashreport-3.3.92-api.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/33c291911e1c4f178be3c4929db57a63/jetified-nativecrashreport-3.9.1-api.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/fa369729f955237da68faf612f465f76/jetified-qndroid-whiteboard-1.1.6-api.jar:/home/mjl/Android/Sdk/platforms/android-30/android.jar:/home/mjl/Android/Sdk/build-tools/29.0.2/core-lambda-stubs.jar" />
+          <option name="classpath" value="$MODULE_DIR$/../../../app/build/intermediates/compile_and_runtime_not_namespaced_r_class_jar/debug/R.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/647050df4529753a167923089c587ad0/jetified-qndroid-rtc-4.0.1-beta.2.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/61f368d8c45af07078af96be5fb469a0/databinding-adapters-4.1.3-api.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/d235e78cac757e4ab925db84a2cb8ddd/databinding-runtime-4.1.3-api.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/200e515765875a657b104fbebf5b2347/jetified-viewbinding-4.1.3-api.jar:/home/mjl/.gradle/caches/modules-2/files-2.1/androidx.databinding/databinding-common/4.1.3/38c07effff5b5a85e4a340086efcea530695cc1c/databinding-common-4.1.3.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/75db3b4617aad1ab58e047454302ef2c/jetified-activity-ktx-1.2.1-api.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/3d171073c025738b457fb72d74b59061/jetified-core-ktx-1.3.2-api.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/0f7b3bd2461d6a099627a4c66ad24834/material-1.2.1-api.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/52e61e813cb44803c1ce78504b8f5ee2/constraintlayout-2.0.4-api.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/121786d19d0c3e49fd7732adc0b9e82b/jetified-zxing-library-2.2-api.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/a45951f5e66547291c4e75545de848a8/jetified-alertdialog-appcompat-debug-api.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/0ebec2fb32490bc79065cb6ba04fe975/appcompat-1.2.0-api.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/1fdff1f9277a526cc34f8102cf44e49e/jetified-viewpager2-1.0.0-api.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/bcbeefce49ccd2dbb8600a71dd7d690b/jetified-okhttp3-integration-4.12.0-api.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/6d670622e53b980a569d4697cfad92be/jetified-glide-4.12.0-api.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/c410c954003a04a62e16b231634559ae/legacy-support-v4-1.0.0-api.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/2ff87a5b5db1b412025c7e0c4f2adc46/fragment-1.3.0-api.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/6d7b1b0b81d7f3c8e0bcd5cd63e1bf9b/recyclerview-1.2.0-api.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/582d83c475be0e9f5de0dae0707a6222/jetified-appcompat-resources-1.2.0-api.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/dd554853cf873ff9ad56d3816e903758/vectordrawable-animated-1.1.0-api.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/7b443cdb4548757a68ffbfef73e2e82f/vectordrawable-1.1.0-api.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/60063806e3f0becf436f80805d08e20b/legacy-support-core-ui-1.0.0-api.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/1eccad0838b28c1931189d8087563444/drawerlayout-1.0.0-api.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/182addf8afaf14cb8ed9f837dda9ddb1/coordinatorlayout-1.1.0-api.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/faf15fe6b54538de16cadef636d90fe6/transition-1.2.0-api.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/a72240ca6de8ad5273364a526d9a46d0/jetified-activity-1.2.1-api.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/43d022e4dd564d332aeeebeefa1345ad/viewpager-1.0.0-api.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/096f4e6a39189555471ec44d2b645a58/legacy-support-core-utils-1.0.0-api.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/d2418c0d6bbd07fb4a4c3523ad10e7d4/loader-1.0.0-api.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/d1be7b5a52cff15b0ac100c38ae6e5b2/slidingpanelayout-1.0.0-api.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/aba2f984e9f5b1c39268bab3420c93ec/customview-1.0.0-api.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/df7a0a39a2014917058f95a1282d853d/media-1.0.0-api.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/7473b52d8aa52eecafd0936a7e9b349a/swiperefreshlayout-1.0.0-api.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/69a7da78702def2a83fce421e6b692a9/asynclayoutinflater-1.0.0-api.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/eddca5b557a5ac6397bf3bd1e9fe4d7c/core-1.3.2-api.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/c94154fbfba06775174ff6b18b0ac867/jetified-lifecycle-runtime-ktx-2.3.0-api.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/7bb59afb95ab6dea5ccf310b3e7b9499/lifecycle-runtime-2.3.0-api.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/709036f7f8c40c0435853c2d88ca6e74/versionedparcelable-1.1.0-api.jar:/home/mjl/.gradle/caches/modules-2/files-2.1/androidx.collection/collection/1.1.0/1f27220b47669781457de0d600849a5de0e89909/collection-1.1.0.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/af18941f3b8e8e25cf7f2a27894ece30/cursoradapter-1.0.0-api.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/d0f286f2d826febef56524b9d8ca3bd3/cardview-1.0.0-api.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/ef64146c0198e421dfd3f3ed527e0da2/jetified-lifecycle-viewmodel-ktx-2.3.1-api.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/6296859f97920f7ea54e2e3874bc452c/jetified-lifecycle-viewmodel-savedstate-2.3.0-api.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/5904aa0fea91a0437c45fa52e594bbc0/lifecycle-viewmodel-2.3.1-api.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/fd156f0850f55407645a600808a2ba04/jetified-savedstate-ktx-1.1.0-api.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/d6d9f41303092596131233dccabf441b/jetified-savedstate-1.1.0-api.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/6626033fd26ca6d83e52f7643d2054ad/jetified-lifecycle-livedata-ktx-2.3.1-api.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/9a85e0e03244fc2cab1aea6b21fd54a7/lifecycle-livedata-2.3.1-api.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/a10d89f07e32a97d4c6271cae5eec1bb/jetified-lifecycle-livedata-core-ktx-2.3.1-api.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/1ba6a312d295b2a1af3acc40bcfcec31/lifecycle-livedata-core-2.3.1-api.jar:/home/mjl/.gradle/caches/modules-2/files-2.1/androidx.lifecycle/lifecycle-common/2.3.1/fc466261d52f4433863642fb40d12441ae274a98/lifecycle-common-2.3.1.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/59478e191ce5ea17251d347407dc85be/core-runtime-2.1.0-api.jar:/home/mjl/.gradle/caches/modules-2/files-2.1/androidx.arch.core/core-common/2.1.0/b3152fc64428c9354344bd89848ecddc09b6f07e/core-common-2.1.0.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/afab22be1e590fed46daf2abca297727/jetified-gifdecoder-4.12.0-api.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/e2e7ef4bfb2555e5000d84c708f7797e/exifinterface-1.2.0-api.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/b8b9eecadfa976d525f940ed9f6fb8a8/interpolator-1.0.0-api.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/ba2f8f2a2726f286d0c8bb0e82e251c2/documentfile-1.0.0-api.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/cd55aa0bbaf21519a3f1f286a829b8ce/localbroadcastmanager-1.0.0-api.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/9375f0108dcbd5b5f0b2ab6f35cb4bc9/print-1.0.0-api.jar:/home/mjl/.gradle/caches/modules-2/files-2.1/androidx.annotation/annotation/1.1.0/e3a6fb2f40e3a3842e6b7472628ba4ce416ea4c8/annotation-1.1.0.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/eb67109027e49068638c7d0581af4a45/jetified-activities-debug-api.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/c2bf84be279e883fbe1afab8e7aeebb2/jetified-dimensions-debug-api.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/70d894d5bf4f7b66a6dcb1c34670f5a9/jetified-kotlin-stdlib-jdk8-1.4.32.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/aacca68dbc5c6374a1ac6cb7b55310cb/jetified-oss-android-sdk-2.9.6-api.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/0dccf271807ad6e4141144d3ec2ba6ff/jetified-okhttp-4.8.1.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/03727e34460ab7460ccfe0f57f2fa3db/jetified-kotlin-stdlib-jdk7-1.4.32.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/f3621df29ddc0b1bf137136a5c4b7a8b/jetified-kotlinx-coroutines-android-1.4.1.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/c86f90f2e6e7def12e8de6c10e7348e7/jetified-okio-jvm-2.7.0.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/fb91717155e651499e4957e8be1f8143/jetified-kotlinx-coroutines-core-jvm-1.4.1.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/1d21e7357a24531eed89dd6dce0c1383/jetified-kotlin-stdlib-1.4.32.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/f2b58f7990301c750ac42a8fd76e0b18/jetified-kotlin-stdlib-common-1.4.32.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/94cd6dd1da1a4576494d489c9b4d3363/jetified-annotations-13.0.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/c10d2c2eab80e0cb1fb3feaa78b3f5b0/jetified-annotation-experimental-1.0.0-api.jar:/home/mjl/.gradle/caches/modules-2/files-2.1/androidx.constraintlayout/constraintlayout-solver/2.0.4/1f001d7db280a89a6c26b26a66eb064bb6d5efeb/constraintlayout-solver-2.0.4.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/b0b82c9e050d776603826645418f372c/jetified-disklrucache-4.12.0.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/f2bdc2ce4420c6c533f18ebe42907557/jetified-annotations-4.12.0.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/96a4ac374f7bc9c5f28bf7c863450b29/jetified-happy-dns-0.2.17.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/d5bd2eae35bc046fa1d1c07fcc17e970/jetified-crashreport-3.3.92-api.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/33c291911e1c4f178be3c4929db57a63/jetified-nativecrashreport-3.9.1-api.jar:/home/mjl/.gradle/caches/transforms-2/files-2.1/2a213ec788e3a84925e35100b6db65e6/jetified-qndroid-whiteboard-1.1.8-api.jar:/home/mjl/Android/Sdk/platforms/android-30/android.jar:/home/mjl/Android/Sdk/build-tools/29.0.2/core-lambda-stubs.jar" />
           <option name="noStdlib" value="true" />
           <option name="noReflect" value="true" />
           <option name="moduleName" value="app_debug" />
@@ -196,6 +196,6 @@
     <orderEntry type="library" name="Gradle: androidx.annotation:annotation-experimental:1.0.0@aar" level="project" />
     <orderEntry type="library" name="Gradle: com.tencent.bugly:crashreport:3.3.92@aar" level="project" />
     <orderEntry type="library" name="Gradle: com.tencent.bugly:nativecrashreport:3.9.1@aar" level="project" />
-    <orderEntry type="library" name="Gradle: :qndroid-whiteboard-1.1.6:@aar" level="project" />
+    <orderEntry type="library" name="Gradle: :qndroid-whiteboard-1.1.8:@aar" level="project" />
   </component>
 </module>
\ No newline at end of file
diff --git a/app/build.gradle b/app/build.gradle
index 7a82e33..df4cbfa 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -101,7 +101,7 @@ dependencies {
     implementation 'com.github.bumptech.glide:okhttp3-integration:4.12.0'
     implementation("com.squareup.okhttp3:okhttp:4.8.1")
     implementation ('com.qiniu:happy-dns:0.2.17')
-    implementation (name:'qndroid-whiteboard-1.1.7',ext:"aar")
+    implementation (name:'qndroid-whiteboard-1.1.8',ext:"aar")
    // implementation project(":qiniuwhiteboard")
     implementation ('com.aliyun.dpa:oss-android-sdk:2.9.6')
     implementation 'cn.yipianfengye.android:zxing-library:2.2'
diff --git a/app/libs/qndroid-whiteboard-1.1.7.aar b/app/libs/qndroid-whiteboard-1.1.8.aar
similarity index 60%
rename from app/libs/qndroid-whiteboard-1.1.7.aar
rename to app/libs/qndroid-whiteboard-1.1.8.aar
index ef8f2b9..db296ba 100644
Binary files a/app/libs/qndroid-whiteboard-1.1.7.aar and b/app/libs/qndroid-whiteboard-1.1.8.aar differ
diff --git a/app/src/main/res/layout/activity_room.xml b/app/src/main/res/layout/activity_room.xml
index 53b0cee..6ddf6b2 100644
--- a/app/src/main/res/layout/activity_room.xml
+++ b/app/src/main/res/layout/activity_room.xml
@@ -2,8 +2,6 @@
 <layout xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto">
 
-
-
     <data>
         <import type="com.qiniu.droid.whiteboard.type.WidgetType" />
 
@@ -14,8 +12,6 @@
             type="com.qiniu.whiteboard.example.RoomViewModel" />
     </data>
 
-
-
     <androidx.constraintlayout.widget.ConstraintLayout
         android:layout_width="match_parent"
         android:layout_height="match_parent"