diff --git a/.dart_tool/package_config.json b/.dart_tool/package_config.json
deleted file mode 100644
index 46c35be..0000000
--- a/.dart_tool/package_config.json
+++ /dev/null
@@ -1,140 +0,0 @@
-{
-  "configVersion": 2,
-  "packages": [
-    {
-      "name": "async",
-      "rootUri": "file:///Users/xianghairui/Development/flutter/.pub-cache/hosted/pub.flutter-io.cn/async-2.6.1",
-      "packageUri": "lib/",
-      "languageVersion": "2.12"
-    },
-    {
-      "name": "boolean_selector",
-      "rootUri": "file:///Users/xianghairui/Development/flutter/.pub-cache/hosted/pub.flutter-io.cn/boolean_selector-2.1.0",
-      "packageUri": "lib/",
-      "languageVersion": "2.12"
-    },
-    {
-      "name": "characters",
-      "rootUri": "file:///Users/xianghairui/Development/flutter/.pub-cache/hosted/pub.flutter-io.cn/characters-1.1.0",
-      "packageUri": "lib/",
-      "languageVersion": "2.12"
-    },
-    {
-      "name": "charcode",
-      "rootUri": "file:///Users/xianghairui/Development/flutter/.pub-cache/hosted/pub.flutter-io.cn/charcode-1.2.0",
-      "packageUri": "lib/",
-      "languageVersion": "2.12"
-    },
-    {
-      "name": "clock",
-      "rootUri": "file:///Users/xianghairui/Development/flutter/.pub-cache/hosted/pub.flutter-io.cn/clock-1.1.0",
-      "packageUri": "lib/",
-      "languageVersion": "2.12"
-    },
-    {
-      "name": "collection",
-      "rootUri": "file:///Users/xianghairui/Development/flutter/.pub-cache/hosted/pub.flutter-io.cn/collection-1.15.0",
-      "packageUri": "lib/",
-      "languageVersion": "2.12"
-    },
-    {
-      "name": "fake_async",
-      "rootUri": "file:///Users/xianghairui/Development/flutter/.pub-cache/hosted/pub.flutter-io.cn/fake_async-1.2.0",
-      "packageUri": "lib/",
-      "languageVersion": "2.12"
-    },
-    {
-      "name": "flutter",
-      "rootUri": "file:///Users/xianghairui/Development/flutter/packages/flutter",
-      "packageUri": "lib/",
-      "languageVersion": "2.12"
-    },
-    {
-      "name": "flutter_test",
-      "rootUri": "file:///Users/xianghairui/Development/flutter/packages/flutter_test",
-      "packageUri": "lib/",
-      "languageVersion": "2.12"
-    },
-    {
-      "name": "matcher",
-      "rootUri": "file:///Users/xianghairui/Development/flutter/.pub-cache/hosted/pub.flutter-io.cn/matcher-0.12.10",
-      "packageUri": "lib/",
-      "languageVersion": "2.12"
-    },
-    {
-      "name": "meta",
-      "rootUri": "file:///Users/xianghairui/Development/flutter/.pub-cache/hosted/pub.flutter-io.cn/meta-1.3.0",
-      "packageUri": "lib/",
-      "languageVersion": "2.12"
-    },
-    {
-      "name": "path",
-      "rootUri": "file:///Users/xianghairui/Development/flutter/.pub-cache/hosted/pub.flutter-io.cn/path-1.8.0",
-      "packageUri": "lib/",
-      "languageVersion": "2.12"
-    },
-    {
-      "name": "sky_engine",
-      "rootUri": "file:///Users/xianghairui/Development/flutter/bin/cache/pkg/sky_engine",
-      "packageUri": "lib/",
-      "languageVersion": "2.12"
-    },
-    {
-      "name": "source_span",
-      "rootUri": "file:///Users/xianghairui/Development/flutter/.pub-cache/hosted/pub.flutter-io.cn/source_span-1.8.1",
-      "packageUri": "lib/",
-      "languageVersion": "2.12"
-    },
-    {
-      "name": "stack_trace",
-      "rootUri": "file:///Users/xianghairui/Development/flutter/.pub-cache/hosted/pub.flutter-io.cn/stack_trace-1.10.0",
-      "packageUri": "lib/",
-      "languageVersion": "2.12"
-    },
-    {
-      "name": "stream_channel",
-      "rootUri": "file:///Users/xianghairui/Development/flutter/.pub-cache/hosted/pub.flutter-io.cn/stream_channel-2.1.0",
-      "packageUri": "lib/",
-      "languageVersion": "2.12"
-    },
-    {
-      "name": "string_scanner",
-      "rootUri": "file:///Users/xianghairui/Development/flutter/.pub-cache/hosted/pub.flutter-io.cn/string_scanner-1.1.0",
-      "packageUri": "lib/",
-      "languageVersion": "2.12"
-    },
-    {
-      "name": "term_glyph",
-      "rootUri": "file:///Users/xianghairui/Development/flutter/.pub-cache/hosted/pub.flutter-io.cn/term_glyph-1.2.0",
-      "packageUri": "lib/",
-      "languageVersion": "2.12"
-    },
-    {
-      "name": "test_api",
-      "rootUri": "file:///Users/xianghairui/Development/flutter/.pub-cache/hosted/pub.flutter-io.cn/test_api-0.3.0",
-      "packageUri": "lib/",
-      "languageVersion": "2.12"
-    },
-    {
-      "name": "typed_data",
-      "rootUri": "file:///Users/xianghairui/Development/flutter/.pub-cache/hosted/pub.flutter-io.cn/typed_data-1.3.0",
-      "packageUri": "lib/",
-      "languageVersion": "2.12"
-    },
-    {
-      "name": "vector_math",
-      "rootUri": "file:///Users/xianghairui/Development/flutter/.pub-cache/hosted/pub.flutter-io.cn/vector_math-2.1.0",
-      "packageUri": "lib/",
-      "languageVersion": "2.12"
-    },
-    {
-      "name": "flutter_openim_sdk",
-      "rootUri": "../",
-      "packageUri": "lib/",
-      "languageVersion": "2.12"
-    }
-  ],
-  "generated": "2021-06-29T10:21:00.926273Z",
-  "generator": "pub",
-  "generatorVersion": "2.13.0"
-}
diff --git a/.dart_tool/package_config_subset b/.dart_tool/package_config_subset
deleted file mode 100644
index 52920bc..0000000
--- a/.dart_tool/package_config_subset
+++ /dev/null
@@ -1,89 +0,0 @@
-flutter_openim_sdk
-2.12
-file:///Users/xianghairui/AndroidStudioProjects/Open-IM-SDK-Flutter/
-file:///Users/xianghairui/AndroidStudioProjects/Open-IM-SDK-Flutter/lib/
-async
-2.12
-file:///Users/xianghairui/Development/flutter/.pub-cache/hosted/pub.flutter-io.cn/async-2.6.1/
-file:///Users/xianghairui/Development/flutter/.pub-cache/hosted/pub.flutter-io.cn/async-2.6.1/lib/
-boolean_selector
-2.12
-file:///Users/xianghairui/Development/flutter/.pub-cache/hosted/pub.flutter-io.cn/boolean_selector-2.1.0/
-file:///Users/xianghairui/Development/flutter/.pub-cache/hosted/pub.flutter-io.cn/boolean_selector-2.1.0/lib/
-characters
-2.12
-file:///Users/xianghairui/Development/flutter/.pub-cache/hosted/pub.flutter-io.cn/characters-1.1.0/
-file:///Users/xianghairui/Development/flutter/.pub-cache/hosted/pub.flutter-io.cn/characters-1.1.0/lib/
-charcode
-2.12
-file:///Users/xianghairui/Development/flutter/.pub-cache/hosted/pub.flutter-io.cn/charcode-1.2.0/
-file:///Users/xianghairui/Development/flutter/.pub-cache/hosted/pub.flutter-io.cn/charcode-1.2.0/lib/
-clock
-2.12
-file:///Users/xianghairui/Development/flutter/.pub-cache/hosted/pub.flutter-io.cn/clock-1.1.0/
-file:///Users/xianghairui/Development/flutter/.pub-cache/hosted/pub.flutter-io.cn/clock-1.1.0/lib/
-collection
-2.12
-file:///Users/xianghairui/Development/flutter/.pub-cache/hosted/pub.flutter-io.cn/collection-1.15.0/
-file:///Users/xianghairui/Development/flutter/.pub-cache/hosted/pub.flutter-io.cn/collection-1.15.0/lib/
-fake_async
-2.12
-file:///Users/xianghairui/Development/flutter/.pub-cache/hosted/pub.flutter-io.cn/fake_async-1.2.0/
-file:///Users/xianghairui/Development/flutter/.pub-cache/hosted/pub.flutter-io.cn/fake_async-1.2.0/lib/
-matcher
-2.12
-file:///Users/xianghairui/Development/flutter/.pub-cache/hosted/pub.flutter-io.cn/matcher-0.12.10/
-file:///Users/xianghairui/Development/flutter/.pub-cache/hosted/pub.flutter-io.cn/matcher-0.12.10/lib/
-meta
-2.12
-file:///Users/xianghairui/Development/flutter/.pub-cache/hosted/pub.flutter-io.cn/meta-1.3.0/
-file:///Users/xianghairui/Development/flutter/.pub-cache/hosted/pub.flutter-io.cn/meta-1.3.0/lib/
-path
-2.12
-file:///Users/xianghairui/Development/flutter/.pub-cache/hosted/pub.flutter-io.cn/path-1.8.0/
-file:///Users/xianghairui/Development/flutter/.pub-cache/hosted/pub.flutter-io.cn/path-1.8.0/lib/
-source_span
-2.12
-file:///Users/xianghairui/Development/flutter/.pub-cache/hosted/pub.flutter-io.cn/source_span-1.8.1/
-file:///Users/xianghairui/Development/flutter/.pub-cache/hosted/pub.flutter-io.cn/source_span-1.8.1/lib/
-stack_trace
-2.12
-file:///Users/xianghairui/Development/flutter/.pub-cache/hosted/pub.flutter-io.cn/stack_trace-1.10.0/
-file:///Users/xianghairui/Development/flutter/.pub-cache/hosted/pub.flutter-io.cn/stack_trace-1.10.0/lib/
-stream_channel
-2.12
-file:///Users/xianghairui/Development/flutter/.pub-cache/hosted/pub.flutter-io.cn/stream_channel-2.1.0/
-file:///Users/xianghairui/Development/flutter/.pub-cache/hosted/pub.flutter-io.cn/stream_channel-2.1.0/lib/
-string_scanner
-2.12
-file:///Users/xianghairui/Development/flutter/.pub-cache/hosted/pub.flutter-io.cn/string_scanner-1.1.0/
-file:///Users/xianghairui/Development/flutter/.pub-cache/hosted/pub.flutter-io.cn/string_scanner-1.1.0/lib/
-term_glyph
-2.12
-file:///Users/xianghairui/Development/flutter/.pub-cache/hosted/pub.flutter-io.cn/term_glyph-1.2.0/
-file:///Users/xianghairui/Development/flutter/.pub-cache/hosted/pub.flutter-io.cn/term_glyph-1.2.0/lib/
-test_api
-2.12
-file:///Users/xianghairui/Development/flutter/.pub-cache/hosted/pub.flutter-io.cn/test_api-0.3.0/
-file:///Users/xianghairui/Development/flutter/.pub-cache/hosted/pub.flutter-io.cn/test_api-0.3.0/lib/
-typed_data
-2.12
-file:///Users/xianghairui/Development/flutter/.pub-cache/hosted/pub.flutter-io.cn/typed_data-1.3.0/
-file:///Users/xianghairui/Development/flutter/.pub-cache/hosted/pub.flutter-io.cn/typed_data-1.3.0/lib/
-vector_math
-2.12
-file:///Users/xianghairui/Development/flutter/.pub-cache/hosted/pub.flutter-io.cn/vector_math-2.1.0/
-file:///Users/xianghairui/Development/flutter/.pub-cache/hosted/pub.flutter-io.cn/vector_math-2.1.0/lib/
-sky_engine
-2.12
-file:///Users/xianghairui/Development/flutter/bin/cache/pkg/sky_engine/
-file:///Users/xianghairui/Development/flutter/bin/cache/pkg/sky_engine/lib/
-flutter
-2.12
-file:///Users/xianghairui/Development/flutter/packages/flutter/
-file:///Users/xianghairui/Development/flutter/packages/flutter/lib/
-flutter_test
-2.12
-file:///Users/xianghairui/Development/flutter/packages/flutter_test/
-file:///Users/xianghairui/Development/flutter/packages/flutter_test/lib/
-2
diff --git a/.dart_tool/version b/.dart_tool/version
deleted file mode 100644
index e3a4f19..0000000
--- a/.dart_tool/version
+++ /dev/null
@@ -1 +0,0 @@
-2.2.0
\ No newline at end of file
diff --git a/.packages b/.packages
deleted file mode 100644
index 759fa85..0000000
--- a/.packages
+++ /dev/null
@@ -1,28 +0,0 @@
-# This file is deprecated. Tools should instead consume 
-# `.dart_tools/package_config.json`.
-# 
-# For more info see: https://dart.dev/go/dot-packages-deprecation
-# 
-# Generated by pub on 2021-06-29 18:21:00.912978.
-async:file:///Users/xianghairui/Development/flutter/.pub-cache/hosted/pub.flutter-io.cn/async-2.6.1/lib/
-boolean_selector:file:///Users/xianghairui/Development/flutter/.pub-cache/hosted/pub.flutter-io.cn/boolean_selector-2.1.0/lib/
-characters:file:///Users/xianghairui/Development/flutter/.pub-cache/hosted/pub.flutter-io.cn/characters-1.1.0/lib/
-charcode:file:///Users/xianghairui/Development/flutter/.pub-cache/hosted/pub.flutter-io.cn/charcode-1.2.0/lib/
-clock:file:///Users/xianghairui/Development/flutter/.pub-cache/hosted/pub.flutter-io.cn/clock-1.1.0/lib/
-collection:file:///Users/xianghairui/Development/flutter/.pub-cache/hosted/pub.flutter-io.cn/collection-1.15.0/lib/
-fake_async:file:///Users/xianghairui/Development/flutter/.pub-cache/hosted/pub.flutter-io.cn/fake_async-1.2.0/lib/
-flutter:file:///Users/xianghairui/Development/flutter/packages/flutter/lib/
-flutter_test:file:///Users/xianghairui/Development/flutter/packages/flutter_test/lib/
-matcher:file:///Users/xianghairui/Development/flutter/.pub-cache/hosted/pub.flutter-io.cn/matcher-0.12.10/lib/
-meta:file:///Users/xianghairui/Development/flutter/.pub-cache/hosted/pub.flutter-io.cn/meta-1.3.0/lib/
-path:file:///Users/xianghairui/Development/flutter/.pub-cache/hosted/pub.flutter-io.cn/path-1.8.0/lib/
-sky_engine:file:///Users/xianghairui/Development/flutter/bin/cache/pkg/sky_engine/lib/
-source_span:file:///Users/xianghairui/Development/flutter/.pub-cache/hosted/pub.flutter-io.cn/source_span-1.8.1/lib/
-stack_trace:file:///Users/xianghairui/Development/flutter/.pub-cache/hosted/pub.flutter-io.cn/stack_trace-1.10.0/lib/
-stream_channel:file:///Users/xianghairui/Development/flutter/.pub-cache/hosted/pub.flutter-io.cn/stream_channel-2.1.0/lib/
-string_scanner:file:///Users/xianghairui/Development/flutter/.pub-cache/hosted/pub.flutter-io.cn/string_scanner-1.1.0/lib/
-term_glyph:file:///Users/xianghairui/Development/flutter/.pub-cache/hosted/pub.flutter-io.cn/term_glyph-1.2.0/lib/
-test_api:file:///Users/xianghairui/Development/flutter/.pub-cache/hosted/pub.flutter-io.cn/test_api-0.3.0/lib/
-typed_data:file:///Users/xianghairui/Development/flutter/.pub-cache/hosted/pub.flutter-io.cn/typed_data-1.3.0/lib/
-vector_math:file:///Users/xianghairui/Development/flutter/.pub-cache/hosted/pub.flutter-io.cn/vector_math-2.1.0/lib/
-flutter_openim_sdk:lib/