Added README.md

Author: li2

README.md

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+[![](https://jitpack.io/v/li2/android-common.svg)](https://jitpack.io/#li2/android-common)
+
+
+##  Common Library
+
+This library icludes bunches of utilities classes.
+
+
+```
+├── arch
+│   ├── Event.kt
+│   ├── LiveDataExt.kt
+│   ├── Resource.kt
+│   └── SingleLiveEvent.kt
+├── collections
+│   └── CollectionsExt.kt
+├── framework
+│   ├── ApiLevelUtils.kt
+│   └── CookiesUtil.kt
+├── logic
+│   └── BooleanExt.kt
+├── net
+│   └── Uri.kt
+├── number
+│   ├── IntExt.kt
+│   └── NumberFormatUtils.kt
+├── rx
+│   ├── ObservableExt.kt
+│   ├── RxBluetooth.kt
+│   ├── RxBus.kt
+│   ├── RxDialog.kt
+│   ├── RxPermissions.kt
+│   └── internal
+└── text
+    ├── StringExt.kt
+    └── buildSpanned.kt
+```
+
+## Usage
+
+TODO
+
+
+
+## Download
+
+```gradle
+implementation 'com.github.li2:android-common:latest_version'
+```
+
+
+
+## License
+
+```
+    Copyright (C) 2020 Weiyi Li
+
+    Licensed under the Apache License, Version 2.0 (the "License");
+    you may not use this file except in compliance with the License.
+    You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+    Unless required by applicable law or agreed to in writing, software
+    distributed under the License is distributed on an "AS IS" BASIS,
+    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+    See the License for the specific language governing permissions and
+    limitations under the License.
+```