Add: README document

README.md

@@ -0,0 +1,22 @@
+# Fitness Recorder
+
+An Android application for reading heart rates from MI Band 2.
+
+## Current Features
+
+- Read realtime heart rate data from MI Band 2
+- Store and export data (Exported database file can be opened by SQLite clients like [SQLite Browser](https://sqlitebrowser.org/), [DataGrip](https://www.jetbrains.com/datagrip/), etc.)
+
+Please forgive the shortcomings in this project, which are probably caused by my lack of Android development knowledge and experience currently. Suggestions and contribution for improvements are certainly welcome.
+
+## Remark
+
+- For longtime measurement, __DO ALLOW__ the app to run in background. (You may need to enable this permission manually, especially for highly customized Android OS like Flyme and MIUI, otherwise the background service may be killed by the system without any notification.)
+- It is suggested to "stop measurement" before exporting data.
+
+## Acknowledgement
+
+- Leo Soares, [Mi Band 2, Part 1: Authentication](https://leojrfs.github.io/writing/miband2-part1-auth/)
+- Volodymyr Shymanskyy, [Mi Band 2 python test](Mi Band 2 python test)
+- Andrey Nikishaev, [How I hacked my Xiaomi MiBand 2 fitness tracker—a step-by-step Linux guide](https://medium.com/@a.nikishaev/how-i-hacked-xiaomi-miband-2-to-control-it-from-linux-a5bd2f36d3ad)
+- 陈利健, [Android BLE开发详解和FastBle源码解析](https://www.jianshu.com/p/795bb0a08beb)

app/build.gradle

@@ -24,15 +24,13 @@ android {
 }
 
 dependencies {
-    implementation fileTree(dir: 'libs', include: ['*.jar'])
+    implementation fileTree(include: ['*.jar'], dir: 'libs')
     implementation 'com.android.support:appcompat-v7:28.0.0-rc01'
     implementation 'com.android.support.constraint:constraint-layout:1.1.2'
     implementation 'com.android.support:recyclerview-v7:28.0.0-rc01'
-
     implementation 'com.annimon:stream:1.2.0'
     implementation 'com.clj.fastble:FastBleLib:2.3.2'
     implementation 'commons-io:commons-io:2.6'
-
     testImplementation 'junit:junit:4.12'
     androidTestImplementation 'com.android.support.test:runner:1.0.2'
     androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'