diff --git a/app/src/main/java/com/duolebo/blyrobot/data/Task.kt b/app/src/main/java/com/duolebo/blyrobot/data/Task.kt
index dd8bff231c304f1059dd23221b4a03aeff456008..11500ecb0094b32265d7c3f71b77578d53bb6c92 100644
--- a/app/src/main/java/com/duolebo/blyrobot/data/Task.kt
+++ b/app/src/main/java/com/duolebo/blyrobot/data/Task.kt
@@ -211,14 +211,15 @@ class Task : Thread, IAppBaseCallback {
         Log.i(TAG, "processChannels")
         step()
         quitCapture()
+        AdbUtil.sendMultiKey(this.apkInfo.channelKeyEvent)
         for (i in index + 1 until this.apkInfo.channelCount) {
 
             if (this.status == State.MANUAL_STOP)
                 return false
+
             // 模拟按键事件. 切换频道进行抓取
             this.channelIndex = i
             capture(apkInfo.captureDelay)
-            AdbUtil.sendMultiKey(this.apkInfo.channelKeyEvent)
 
             if (!AppUtil.isAppForeground(context, this.apkInfo.packageName)) {
                 Log.i(TAG, "target app crashed?")
@@ -226,6 +227,8 @@ class Task : Thread, IAppBaseCallback {
             }
 
             step()
+
+            AdbUtil.sendMultiKey(this.apkInfo.channelKeyEvent)
         }
 
         return true
@@ -237,26 +240,19 @@ class Task : Thread, IAppBaseCallback {
      */
     private fun step() {
         Log.i(TAG, "step channel ${this.channelIndex}")
+        doCapture()
+        doScreenShot()
+    }
 
+    private fun doCapture() {
         var playUrlItems = analysisCapture()
         // 如果没有抓取到地址，再次尝试
         if (playUrlItems.size <= 0) {
             capture(this.apkInfo.captureDelay)
             playUrlItems = analysisCapture()
         }
-        // 截图保存
-        val screenShots = saveScreenShot()
-        if (screenShots.size > 0)
-            uploadImages.addAll(screenShots)
-
         val channels = this.reportJson.optJSONArray("channels")
         val channelJson = JSONObject()
-
-        val channelImageFile = File(screenShots[0])
-        channelJson.putOpt("channelImage", channelImageFile.name)
-        val channelEpgImageFile = File(screenShots[1])
-        channelJson.putOpt("channelEpgImage", channelEpgImageFile.name)
-
         channelJson.putOpt("channelId", this.channelIndex)
 
         val playUrls = JSONArray()
@@ -281,7 +277,8 @@ class Task : Thread, IAppBaseCallback {
 
         if (quit) {
             Log.i(TAG, "capture sleep $delay seconds")
-            Thread.sleep(delay * 1000L)
+
+            sleepBySeconds(delay.toLong())
             quitCapture()
         }
     }
@@ -358,7 +355,7 @@ class Task : Thread, IAppBaseCallback {
     }
 
     // 截取一张频道图+一张显示频道节目的图
-    private fun saveScreenShot(): ArrayList<String> {
+    private fun doScreenShot() {
         val screenImages = ArrayList<String>()
 
         var time = imageDateFormat.format(Date())
@@ -372,7 +369,27 @@ class Task : Thread, IAppBaseCallback {
         screenShot(absOkName)
         screenImages.add("$absOkName.jpg")
 
-        return screenImages
+        AdbUtil.sendMultiKey("back")
+
+        if (screenImages.size > 0)
+            uploadImages.addAll(screenImages)
+
+        val channelJson = JSONObject()
+
+        val channelImageFile = File(screenImages[0])
+        channelJson.putOpt("channelImage", channelImageFile.name)
+        val channelEpgImageFile = File(screenImages[1])
+        channelJson.putOpt("channelEpgImage", channelEpgImageFile.name)
+
+        channelJson.putOpt("channelId", this.channelIndex)
+    }
+
+    private fun sleepBySeconds(seconds: Long) {
+        try {
+            Thread.sleep(seconds * 1000)
+        } catch (e: Exception) {
+            e.printStackTrace()
+        }
     }
 
     // 截图处理，转成jpg
diff --git a/app/src/main/java/com/duolebo/blyrobot/util/AdbUtil.kt b/app/src/main/java/com/duolebo/blyrobot/util/AdbUtil.kt
index aaffe277084998b623c83b7451251551a03112da..cbb6c3871b23ed59307e3f494ac998a4f55ba5d0 100644
--- a/app/src/main/java/com/duolebo/blyrobot/util/AdbUtil.kt
+++ b/app/src/main/java/com/duolebo/blyrobot/util/AdbUtil.kt
@@ -9,7 +9,7 @@ import java.io.IOException
 import java.io.InputStreamReader
 
 object AdbUtil {
-    const val TAG = "AdbUtil"
+    const val TAG = "TaskAdbUtil"
     const val SHELL = "sh"
     const val ROOT_SHELL = "su"
     const val LINE_BREAK = "\n"
@@ -209,6 +209,7 @@ object AdbUtil {
     }
 
     fun sendMultiKey(keyPath: String) {
+        Log.i(TAG, "sendMultiKey:$keyPath")
         val keyEvents = ArrayList<EmulateKey>()
         val keys = keyPath.split(Constants.SLASH)
         for (stepKey in keys) {