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README.md

@@ -7,7 +7,12 @@
 
 BJUT Wi-Fi client for Android.
 
-Warning: This is an experimental app.
+**Warning:** This is an experimental app.
 
 ## Install
-See [Releases](https://github.com/yunv/BJUTWiFi/releases). For a more stable app, go to [BJUTLoginApp](https://github.com/ZeroGoYoosee/BJUTLoginApp/).
+See [Releases](https://github.com/yunv/BJUTWiFi/releases). 
+
+Only Android 8.1 and later is supported. If you are using older versions, go to [BJUTLoginApp](https://github.com/ZeroGoYoosee/BJUTLoginApp/).
+
+## Screenshot
+<img src="https://github.com/yunv/BJUTWiFi/blob/master/art/0.png" width="540px">

app/src/main/kotlin/com/android/settings/graph/UsageGraph.kt

@@ -120,11 +120,8 @@ class UsageGraph(context: Context, attrs: AttributeSet?) : View(context, attrs)
 
     private fun addPathAndUpdate(points: SparseIntArray, paths: SparseIntArray,
                                  localPaths: SparseIntArray) {
-        var i = 0
-        val size = points.size()
-        while (i < size) {
+        for (i in 0 until points.size()) {
             paths.put(points.keyAt(i), points.valueAt(i))
-            i++
         }
         // Add a delimiting value immediately after the last point.
         paths.put(points.keyAt(points.size() - 1) + 1, PATH_DELIM)
@@ -185,26 +182,19 @@ class UsageGraph(context: Context, attrs: AttributeSet?) : View(context, attrs)
         }
     }
 
-    private fun hasDiff(x1: Int, x2: Int): Boolean {
-        return Math.abs(x2 - x1) >= mCornerRadius
-    }
+    private fun hasDiff(x1: Int, x2: Int) = Math.abs(x2 - x1) >= mCornerRadius
 
-    private fun getX(x: Float): Int {
-        return (x / mMaxX * width).toInt()
-    }
+    private fun getX(x: Float) = (x / mMaxX * width).toInt()
 
-    private fun getY(y: Float): Int {
-        return (height * (1 - y / mMaxY)).toInt()
-    }
+    private fun getY(y: Float) = (height * (1 - y / mMaxY)).toInt()
 
     private fun updateGradient() {
         mFillPaint.shader = LinearGradient(0f, 0f, 0f, height.toFloat(),
                 getColor(mAccentColor, .2f), 0, TileMode.CLAMP)
     }
 
-    private fun getColor(color: Int, alphaScale: Float): Int {
-        return color and ((0xff * alphaScale).toInt() shl 24 or 0xffffff)
-    }
+    private fun getColor(color: Int, alphaScale: Float) =
+            color and ((0xff * alphaScale).toInt() shl 24 or 0xffffff)
 
     override fun onDraw(canvas: Canvas) {
         // Draw lines across the top, middle, and bottom.
@@ -280,6 +270,6 @@ class UsageGraph(context: Context, attrs: AttributeSet?) : View(context, attrs)
     }
 
     companion object {
-        private val PATH_DELIM = -1
+        private const val PATH_DELIM = -1
     }
 }

app/src/main/kotlin/me/liuyun/bjutlgn/ui/StatusCard.kt

@@ -95,7 +95,7 @@ class StatusCard(private val cv: FrameLayout, private val graphCard: GraphCard?,
         cv.progress_ring.progressValue = percent
         startSpringAnimation(cv.progress_ring)
 
-        if (stats.isOnline) {
+        if (stats.isOnline && stats.flow != 0 && !app.prefs.getBoolean("debug", false)) {
             app.appDatabase.flowDao().insert(Flow(0, System.currentTimeMillis() / 1000L, stats.flow))
             graphCard?.show()
 

build.gradle

@@ -1,7 +1,7 @@
 // Top-level build file where you can add configuration options common to all sub-projects/modules.
 
 buildscript {
-    ext.kotlin_version = '1.2.21'
+    ext.kotlin_version = '1.2.30'
     ext.anko_version = '0.10.4'
     ext.support_lib_version = '27.0.2'
     ext.lifecycle_version = '1.1.0'
@@ -11,7 +11,7 @@ buildscript {
         google()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:3.1.0-beta4'
+        classpath 'com.android.tools.build:gradle:3.1.0-rc02'
         classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
     }
 }