Add some android commands (#517)

* add commands

* fix rubocop

* add documentations

* update some comments

Author: KazuCocoa

android_tests/lib/android/specs/common/command.rb

@@ -20,6 +20,9 @@ def before_first
     Selenium::WebDriver::Remote::Bridge.method_defined?(:get_network_connection).must_equal true
     Selenium::WebDriver::Remote::Bridge.method_defined?(:get_performance_data_types).must_equal true
     Selenium::WebDriver::Remote::Bridge.method_defined?(:get_performance_data).must_equal true
+    Selenium::WebDriver::Remote::Bridge.method_defined?(:get_system_bars).must_equal true
+    Selenium::WebDriver::Remote::Bridge.method_defined?(:get_display_density).must_equal true
+    Selenium::WebDriver::Remote::Bridge.method_defined?(:is_keyboard_shown).must_equal true
   end
 
   t 'check all command with arg' do

android_tests/lib/android/specs/common/device.rb

@@ -23,6 +23,18 @@
     Date.parse(device_time)
   end
 
+  t 'get_system_bars' do
+    get_system_bars
+  end
+
+  t 'get_display_density' do
+    (get_display_density > 0).must_equal true
+  end
+
+  t 'system_bars' do
+    is_keyboard_shown.must_equal false
+  end
+
   t 'background_app' do
     wait { background_app 5 }
   end

lib/appium_lib/common/command.rb

@@ -13,6 +13,9 @@ module Commands
         open_notifications:         [:post, 'session/:session_id/appium/device/open_notifications'.freeze],
         toggle_airplane_mode:       [:post, 'session/:session_id/appium/device/toggle_airplane_mode'.freeze],
         current_activity:           [:get,  'session/:session_id/appium/device/current_activity'.freeze],
+        get_system_bars:            [:get,  'session/:session_id/appium/device/system_bars'.freeze],
+        get_display_density:        [:get,  'session/:session_id/appium/device/display_density'.freeze],
+        is_keyboard_shown:          [:get,  'session/:session_id/appium/device/is_keyboard_shown'.freeze],
         get_network_connection:     [:get,  'session/:session_id/network_connection'.freeze],
         get_performance_data_types: [:post, 'session/:session_id/appium/performanceData/types'.freeze],
 

lib/appium_lib/device/device.rb

@@ -23,6 +23,30 @@ module Device
 
     # @!method current_activity
 
+    # @!method get_system_bars
+    #   Get system bar's information
+    #   @return [String] System bar
+    #
+    #   ```ruby
+    #   get_system_bars
+    #   ```
+
+    # @!method get_display_density
+    #   Get connected device's density.
+    #   @return [Integer] The size of density
+    #
+    #   ```ruby
+    #   get_display_density # 320
+    #   ```
+
+    # @!method is_keyboard_shown
+    #   Get whether keyboard is displayed or not.
+    #   @return [Bool] Return true if keyboard is shown. Return false if keyboard is hidden.
+    #
+    #   ```ruby
+    #   is_keyboard_shown # false
+    #   ```
+
     # @!method launch_app
     #   Start the simulator and application configured with desired capabilities
 
@@ -538,7 +562,7 @@ def ime_deactivate
     #   @return [String] The context currently being used.
 
     # @!method available_contexts
-    # @return [Array<String>] All usable contexts, as an array of strings.
+    #   @return [Array<String>] All usable contexts, as an array of strings.
 
     # Perform a block within the given context, then switch back to the starting context.
     # @param context (String) The context to switch to for the duration of the block.