Added some minor instructions for AndroidStudio 3.1.2

README.md

@@ -15,6 +15,37 @@
 |color_unchecked_stroke|color|未选中时边框颜色|
 
 
+## Install (Android Studio 3.1.2)
+
+1. Select `File` > `Project Structure...`
+
+2. Click the green `+` icon (top left) 
+
+ **or** Press **ALT+INSERT** to open the "new module dialog.
+
+3. Select `Import Gradle Project`
+
+4. Select the directory where you download and unzipped the project. 
+
+ **or** 
+ - git clone https://github.com/andyxialm/SmoothCheckBox.git
+ - specifically `SmoothCheckBox`
+
+5. The dialog will present two modules `:library` and `:sample`, check `:library` checkbox. Then choose `Finish`.
+
+6. Open your projects `settings.gradle(Project Settings)` file. Add a new line `:library`
+
+7. Open `build.gradle(Module:app)` in the 
+
+```
+dependencies {  
+		...
+		implementation project(':library')
+}
+```
+8. Gradle `sync` your project, to complete the changes.
+
+
 ## Sample Usage 使用
 
 
@@ -61,4 +92,4 @@ Welcome to [offer me](mailto:andyxialm@gmail.com). :smiley:
     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.
+    limitations under the License.