Update Android Apps to use gradle

platform_tools/android/gyp/skia_android.gypi

 # Copyright 2015 Google Inc.
 #
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 # This GYP file stores the dependencies necessary to build Skia on the Android
 # platform. The OS doesn't provide many stable libraries as part of the
 # distribution so we have to build a few of them ourselves.
 #
 {
   'variables': {
     'conditions': [
       [ 'skia_arch_type == "arm" and arm_version != 7', {
         'android_arch%': "armeabi",
+        'android_variant%': "arm",
       }],
       [ 'skia_arch_type == "arm" and arm_version == 7', {
         'android_arch%': "armeabi-v7a",
+        'android_variant%': "arm",
       }],
       [ 'skia_arch_type == "arm64"', {
         'android_arch%': "arm64-v8a",
+        'android_variant%': "arm64",
       }],
       [ 'skia_arch_type == "x86"', {
         'android_arch%': "x86",
+        'android_variant%': "x86",
       }],
       [ 'skia_arch_type == "x86_64"', {
         'android_arch%': "x86_64",
+        'android_variant%': "x86_64",
       }],
       [ 'skia_arch_type == "mips" and skia_arch_width == 32', {
         'android_arch%': "mips",
+        'android_variant%': "mips",
       }],
       [ 'skia_arch_type == "mips" and skia_arch_width == 64', {
         'android_arch%': "mips64",
+        'android_variant%': "mips64",
       }],
     ],
   },
   'targets': [
     {
       'target_name': 'CopySampleAppDeps',
       'type': 'none',
       'dependencies': [
         'skia_lib.gyp:skia_lib',
         'SampleApp.gyp:SampleApp',
       ],
       'copies': [
         # Copy all shared libraries into the Android app's libs folder.  Note
         # that this copy requires us to build SkiaAndroidApp after those
         # libraries, so that they exist by the time it occurs.  If there are no
         # libraries to copy, this will cause an error in Make, but the app will
         # still build.
         {
-          'destination': '<(PRODUCT_DIR)/android/SampleApp/libs/<(android_arch)',
+          'destination': '<(android_base)/apps/sample_app/src/main/libs/<(android_arch)',
           'conditions': [
             [ 'skia_shared_lib', {
               'files': [
                 '<(SHARED_LIB_DIR)/libSampleApp.so',
                 '<(SHARED_LIB_DIR)/libskia_android.so',
               ]}, {
               'files': [
                 '<(SHARED_LIB_DIR)/libSampleApp.so',
              ]}
            ],
           ],
         },
       ],
     },
     {
       'target_name': 'SampleApp_APK',
       'type': 'none',
       'dependencies': [
         'CopySampleAppDeps',
       ],
-      'variables': {
-         'ANDROID_SDK_ROOT': '<!(echo $ANDROID_SDK_ROOT)',
-         # the ninja generator treats PRODUCT_DIR as a relative path to the
-         # gyp directory but android ant build wants a path relative to the
-         # build.xml file so we do that adjustment here.
-         'ANDROID_OUT': '../../<(PRODUCT_DIR)/android/SampleApp'
-       },
       'actions': [
         {
           'action_name': 'SampleApp_apk',
           'inputs': [
-            '<(android_base)/app/AndroidManifest.xml',
-            '<(android_base)/app/build.xml',
-            '<(android_base)/app/project.properties',
-            '<(android_base)/app/jni/com_skia_SkiaSampleRenderer.h',
-            '<(android_base)/app/jni/com_skia_SkiaSampleRenderer.cpp',
-            '<(android_base)/app/src/com/skia/SkiaSampleActivity.java',
-            '<(android_base)/app/src/com/skia/SkiaSampleRenderer.java',
-            '<(android_base)/app/src/com/skia/SkiaSampleView.java',
+            '<(android_base)/apps/sample_app/src/main/AndroidManifest.xml',
+            '<(android_base)/apps/sample_app/src/main/jni/com_skia_SkiaSampleRenderer.h',
+            '<(android_base)/apps/sample_app/src/main/jni/com_skia_SkiaSampleRenderer.cpp',
+            '<(android_base)/apps/sample_app/src/main/java/com/skia/SkiaSampleActivity.java',
+            '<(android_base)/apps/sample_app/src/main/java/com/skia/SkiaSampleRenderer.java',
+            '<(android_base)/apps/sample_app/src/main/java/com/skia/SkiaSampleView.java',
           ],
           'outputs': [
-            '<(PRODUCT_DIR)/../android/SampleApp/bin/SampleApp.apk',
+            '<(android_base)/apps/sample_app/build',
           ],
           'action': [
-            'ant',
-            '-quiet',
-            '-f',
-            '<(android_base)/app/build.xml',
-            '-Dout.dir=<(ANDROID_OUT)/bin',
-            '-Dgen.absolute.dir=<(ANDROID_OUT)/gen',
-            '-Dnative.libs.absolute.dir=<(ANDROID_OUT)/libs',
-            '-Dout.final.file=<(ANDROID_OUT)/bin/SampleApp.apk',
-            '-Dsdk.dir=<(ANDROID_SDK_ROOT)',
-            'debug',
+            '<(android_base)/apps/gradlew',
+            ':sample_app:assemble<(android_variant)Debug',
+            '-p<(android_base)/apps/sample_app',
+            '-PsuppressNativeBuild',
           ],
         },
       ],
     },
     {
       'target_name': 'CopyVisualBenchDeps',
       'type': 'none',
       'dependencies': [
         'skia_lib.gyp:skia_lib',
         'visualbench.gyp:visualbench',
       ],
 
       'copies': [
         # Copy all shared libraries into the Android app's libs folder.  Note
         # that this copy requires us to build SkiaAndroidApp after those
         # libraries, so that they exist by the time it occurs.  If there are no
         # libraries to copy, this will cause an error in Make, but the app will
         # still build.
         {
-          'destination': '<(PRODUCT_DIR)/android/VisualBench/libs/<(android_arch)',
+          'destination': '<(android_base)/apps/visualbench/src/main/libs/<(android_arch)',
           'conditions': [
             [ 'skia_shared_lib', {
               'files': [
                 '<(SHARED_LIB_DIR)/libskia_android.so',
                 '<(SHARED_LIB_DIR)/libvisualbench.so',
               ]}, {
               'files': [
                 '<(SHARED_LIB_DIR)/libvisualbench.so',
              ]}
            ],
           ],
         },
       ],
     },
     {
       'target_name': 'VisualBench_APK',
       'type': 'none',
       'dependencies': [
         'CopyVisualBenchDeps',
       ],
-      'variables': {
-         'ANDROID_SDK_ROOT': '<!(echo $ANDROID_SDK_ROOT)',
-         # the ninja generator treats PRODUCT_DIR as a relative path to the
-         # gyp directory but android ant build wants a path relative to the
-         # build.xml file so we do that adjustment here.
-         'ANDROID_OUT': '../../<(PRODUCT_DIR)/android/VisualBench/'
-       },
       'actions': [
         {
           'action_name': 'SkiaVisualBench_apk',
           'inputs': [
-            '<(android_base)/visualbench/AndroidManifest.xml',
-            '<(android_base)/visualbench/build.xml',
-            '<(android_base)/visualbench/project.properties',
-            '<(android_base)/visualbench/src/com/skia/VisualBenchActivity.java',
+            '<(android_base)/apps/visualbench/src/main/AndroidManifest.xml',
+            '<(android_base)/apps/visualbench/src/main/java/com/skia/VisualBenchActivity.java',
           ],
           'outputs': [
-            '<(PRODUCT_DIR)/../android/VisualBench/bin/VisualBench.apk',
+            '<(android_base)/apps/visualbench/build',
           ],
           'action': [
-            'ant',
-            '-quiet',
-            '-f',
-            '<(android_base)/visualbench/build.xml',
-            '-Dout.dir=<(ANDROID_OUT)/bin',
-            '-Dgen.absolute.dir=<(ANDROID_OUT)/gen',
-            '-Dnative.libs.absolute.dir=<(ANDROID_OUT)/libs',
-            '-Dout.final.file=<(ANDROID_OUT)/bin/VisualBench.apk',
-            '-Dsdk.dir=<(ANDROID_SDK_ROOT)',
-            'debug',
+            '<(android_base)/apps/gradlew',
+            ':visualbench:assemble<(android_variant)Debug',
+            '-p<(android_base)/apps/visualbench',
+            '-PsuppressNativeBuild',
           ],
         },
       ],
     },
   ],
 }