add sd card when creating avd and wait for it ready before pushing data into it

build/android/pylib/android_commands.py

 # Copyright (c) 2012 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 """Provides an interface to communicate with the device via the adb command.
 
 Assumes adb binary is currently on system path.
 """
 
 import collections
@@ skipping 301 matching lines @@
 
     logging.info('>>> $' + install_command)
     return self._adb.SendCommand(install_command, timeout_time=2*60)
 
   def MakeSystemFolderWritable(self):
     """Remounts the /system folder rw.  """
     out = self._adb.SendCommand('remount')
     if out.strip() != 'remount succeeded':
       raise errors.MsgException('Remount failed: %s' % out)
 
+  def WaitForSdCardReady(self, timeout_time):
+    """Wait for the SD card ready before pushing data into it."""
+    logging.info('Waiting for SD card ready...')
+    sdcard_ready = False
+    attempts = 0
+    wait_period = 5
+    while not sdcard_ready and attempts * wait_period < timeout_time:
+      output = self.RunShellCommand('ls /sdcard/')
+      if len(output) > 0:
+        sdcard_ready = True
+      else:
+        time.sleep(wait_period)
+        attempts += 1
+    if not sdcard_ready:
+      raise errors.WaitForResponseTimedOutError(
+          'SD card not ready after %s seconds' % timeout_time)
+
   # It is tempting to turn this function into a generator, however this is not
   # possible without using a private (local) adb_shell instance (to ensure no
   # other command interleaves usage of it), which would defeat the main aim of
   # being able to reuse the adb shell instance across commands.
   def RunShellCommand(self, command, timeout_time=20, log_result=True):
     """Send a command to the adb shell and return the result.
 
     Args:
       command: String containing the shell command to send. Must not include
                the single quotes as we use them to escape the whole command.
@@ skipping 500 matching lines @@
     pid_list = self.ExtractPid(package)
     smaps = collections.defaultdict(dict)
 
     for pid in pid_list:
       usage_dict_per_pid, smaps_per_pid = self.GetMemoryUsageForPid(pid)
       smaps[pid] = smaps_per_pid
       for (key, value) in usage_dict_per_pid.items():
         usage_dict[key] += value
 
     return usage_dict, smaps