diff --git a/app/build.gradle b/app/build.gradle
index 19f542a..a42eaf0 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -7,7 +7,7 @@ android {
         minSdkVersion 19
         targetSdkVersion 28
         versionCode 101002
-        versionName "1.2"
+        versionName "1.2.1"
         testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
     }
     buildTypes {
diff --git a/app/src/main/java/com/kevin/testool/adblib/CmdTools.java b/app/src/main/java/com/kevin/testool/adblib/CmdTools.java
index 09d8af1..241e712 100644
--- a/app/src/main/java/com/kevin/testool/adblib/CmdTools.java
+++ b/app/src/main/java/com/kevin/testool/adblib/CmdTools.java
@@ -337,7 +337,8 @@ public static String _execAdbCmd(final String cmd, final int wait) {
                     stream.close();
                 }
             } else {
-                Thread.sleep(Math.abs(wait));
+                Thread.sleep(100);
+                return "";
             }
 
             // 获取stream所有输出
diff --git a/app/src/main/java/com/kevin/testool/common/Common.java b/app/src/main/java/com/kevin/testool/common/Common.java
index 53e972a..4b2ddcc 100644
--- a/app/src/main/java/com/kevin/testool/common/Common.java
+++ b/app/src/main/java/com/kevin/testool/common/Common.java
@@ -438,7 +438,7 @@ public static ArrayList<Element> get_elements(Boolean fresh, String key, String
                         SystemClock.sleep(100);
                         wait += 100;
                     }
-                    if (wait > 15000){
+                    if (wait > 60000){
                         complete = true;
                     }
                 }
diff --git a/app/src/main/java/com/kevin/testool/utils/AdbUtils.java b/app/src/main/java/com/kevin/testool/utils/AdbUtils.java
index 1f3e5a5..21f6e3d 100644
--- a/app/src/main/java/com/kevin/testool/utils/AdbUtils.java
+++ b/app/src/main/java/com/kevin/testool/utils/AdbUtils.java
@@ -106,10 +106,10 @@ public void run() {
     }
 
     /**
-     * Root身份执行shell命令，不关注输出结果
-     *
+     * 执行shell命令，无root权限需开启adb tcpip 5555
      * @param command 待执行的shell命令
-     * @return 是否成功执行shell命令
+     * @param timeout timeout == 0 阻塞命令直到执行结束;timeout>0 超时时间,超时后结束进程; timeout< 0 等待timeout绝对值时间，不返回命令结果
+     * @return shell命令执行结果
      */
     public static String runShellCommand(String command, int timeout) {
         boolean waitResult = true;