UBuntuでAndroidデモをビルドする際のエラー

Question

私はhereと記載されているアンドロイドデモをビルドしようとしています。

また、私は以下のエラーの変形を続けています。私は、手動でいくつかのファイルをフォルダにコピーするだけでなく、APIレベルの変更を試みました。

エラーを解決する方法？前もって感謝します。

my@my:~/tensorflow$ bazel build //tensorflow/examples/android:tensorflow_demo 
WARNING: Bazel Android NDK crosstools are based on Android NDK revision 11. The revision of the Android NDK given in android_ndk_repository rule 'androidndk' is '12.1.2977051'. 
WARNING: /home/my/tensorflow/tensorflow/core/BUILD:646:12: in srcs attribute of cc_library rule //tensorflow/core:android_tensorflow_lib_lite: please do not import '//tensorflow/core/debug:debug_graph_utils.cc' directly. You should either move the file to this package or depend on an appropriate rule there. 
WARNING: /home/my/tensorflow/tensorflow/core/BUILD:646:12: in srcs attribute of cc_library rule //tensorflow/core:android_tensorflow_lib_lite: please do not import '//tensorflow/core/debug:debug_graph_utils.h' directly. You should either move the file to this package or depend on an appropriate rule there. 
WARNING: /home/my/tensorflow/tensorflow/core/BUILD:646:12: in srcs attribute of cc_library rule //tensorflow/core:android_tensorflow_lib_lite: please do not import '//tensorflow/core/kernels:avgpooling_op.h' directly. You should either move the file to this package or depend on an appropriate rule there. 
WARNING: /home/my/tensorflow/tensorflow/core/BUILD:646:12: in srcs attribute of cc_library rule //tensorflow/core:android_tensorflow_lib_lite: please do not import '//tensorflow/core/kernels:bounds_check.h' directly. You should either move the file to this package or depend on an appropriate rule there. 
WARNING: /home/my/tensorflow/tensorflow/core/BUILD:646:12: in srcs attribute of cc_library rule //tensorflow/core:android_tensorflow_lib_lite: please do not import '//tensorflow/core/kernels:eigen_activations.h' directly. You should either move the file to this package or depend on an appropriate rule there. 
WARNING: /home/my/tensorflow/tensorflow/core/BUILD:646:12: in srcs attribute of cc_library rule //tensorflow/core:android_tensorflow_lib_lite: please do not import '//tensorflow/core/kernels:eigen_attention.h' directly. You should either move the file to this package or depend on an appropriate rule there. 
WARNING: /home/my/tensorflow/tensorflow/core/BUILD:646:12: in srcs attribute of cc_library rule //tensorflow/core:android_tensorflow_lib_lite: please do not import '//tensorflow/core/kernels:eigen_backward_cuboid_convolutions.h' directly. You should either move the file to this package or depend on an appropriate rule there. 
WARNING: /home/my/tensorflow/tensorflow/core/BUILD:646:12: in srcs attribute of cc_library rule //tensorflow/core:android_tensorflow_lib_lite: please do not import '//tensorflow/core/kernels:eigen_backward_spatial_convolutions.h' directly. You should either move the file to this package or depend on an appropriate rule there. 
WARNING: /home/my/tensorflow/tensorflow/core/BUILD:646:12: in srcs attribute of cc_library rule //tensorflow/core:android_tensorflow_lib_lite: please do not import '//tensorflow/core/kernels:eigen_cuboid_convolution.h' directly. You should either move the file to this package or depend on an appropriate rule there. 
WARNING: /home/my/tensorflow/tensorflow/core/BUILD:646:12: in srcs attribute of cc_library rule //tensorflow/core:android_tensorflow_lib_lite: please do not import '//tensorflow/core/kernels:eigen_patch_3d.h' directly. You should either move the file to this package or depend on an appropriate rule there. 
WARNING: /home/my/tensorflow/tensorflow/core/BUILD:646:12: in srcs attribute of cc_library rule //tensorflow/core:android_tensorflow_lib_lite: please do not import '//tensorflow/core/kernels:eigen_pooling.h' directly. You should either move the file to this package or depend on an appropriate rule there. 
WARNING: /home/my/tensorflow/tensorflow/core/BUILD:646:12: in srcs attribute of cc_library rule //tensorflow/core:android_tensorflow_lib_lite: please do not import '//tensorflow/core/kernels:eigen_softmax.h' directly. You should either move the file to this package or depend on an appropriate rule there. 
WARNING: /home/my/tensorflow/tensorflow/core/BUILD:646:12: in srcs attribute of cc_library rule //tensorflow/core:android_tensorflow_lib_lite: please do not import '//tensorflow/core/kernels:eigen_spatial_convolutions.h' directly. You should either move the file to this package or depend on an appropriate rule there. 
WARNING: /home/my/tensorflow/tensorflow/core/BUILD:646:12: in srcs attribute of cc_library rule //tensorflow/core:android_tensorflow_lib_lite: please do not import '//tensorflow/core/kernels:maxpooling_op.h' directly. You should either move the file to this package or depend on an appropriate rule there. 
WARNING: /home/my/tensorflow/tensorflow/core/BUILD:646:12: in srcs attribute of cc_library rule //tensorflow/core:android_tensorflow_lib_lite: please do not import '//tensorflow/core/kernels:ops_util.cc' directly. You should either move the file to this package or depend on an appropriate rule there. 
WARNING: /home/my/tensorflow/tensorflow/core/BUILD:646:12: in srcs attribute of cc_library rule //tensorflow/core:android_tensorflow_lib_lite: please do not import '//tensorflow/core/kernels:ops_util.h' directly. You should either move the file to this package or depend on an appropriate rule there. 
WARNING: /home/my/tensorflow/tensorflow/core/BUILD:646:12: in srcs attribute of cc_library rule //tensorflow/core:android_tensorflow_lib_lite: please do not import '//tensorflow/core/kernels:pooling_ops_common.cc' directly. You should either move the file to this package or depend on an appropriate rule there. 
WARNING: /home/my/tensorflow/tensorflow/core/BUILD:646:12: in srcs attribute of cc_library rule //tensorflow/core:android_tensorflow_lib_lite: please do not import '//tensorflow/core/kernels:pooling_ops_common.h' directly. You should either move the file to this package or depend on an appropriate rule there. 
WARNING: /home/my/tensorflow/tensorflow/core/BUILD:646:12: in srcs attribute of cc_library rule //tensorflow/core:android_tensorflow_lib_lite: please do not import '//tensorflow/core/util/ctc:ctc_beam_entry.h' directly. You should either move the file to this package or depend on an appropriate rule there. 
WARNING: /home/my/tensorflow/tensorflow/core/BUILD:646:12: in srcs attribute of cc_library rule //tensorflow/core:android_tensorflow_lib_lite: please do not import '//tensorflow/core/util/ctc:ctc_beam_scorer.h' directly. You should either move the file to this package or depend on an appropriate rule there. 
WARNING: /home/my/tensorflow/tensorflow/core/BUILD:646:12: in srcs attribute of cc_library rule //tensorflow/core:android_tensorflow_lib_lite: please do not import '//tensorflow/core/util/ctc:ctc_beam_search.h' directly. You should either move the file to this package or depend on an appropriate rule there. 
WARNING: /home/my/tensorflow/tensorflow/core/BUILD:646:12: in srcs attribute of cc_library rule //tensorflow/core:android_tensorflow_lib_lite: please do not import '//tensorflow/core/util/ctc:ctc_decoder.h' directly. You should either move the file to this package or depend on an appropriate rule there. 
WARNING: /home/my/tensorflow/tensorflow/core/BUILD:646:12: in srcs attribute of cc_library rule //tensorflow/core:android_tensorflow_lib_lite: please do not import '//tensorflow/core/util/ctc:ctc_loss_util.h' directly. You should either move the file to this package or depend on an appropriate rule there. 
INFO: Found 1 target... 
ERROR: missing input file '@androidsdk//:platforms/android-23/android.jar'. 
ERROR: /home/my/tensorflow/tensorflow/examples/android/BUILD:47:1: //tensorflow/examples/android:tensorflow_demo: missing input file '@androidsdk//:platforms/android-23/android.jar'. 
Target //tensorflow/examples/android:tensorflow_demo failed to build 
Use --verbose_failures to see the command lines of failed build steps. 
ERROR: /home/my/tensorflow/tensorflow/examples/android/BUILD:47:1 1 input file(s) do not exist. 
INFO: Elapsed time: 0.105s, Critical Path: 0.01s 

Answer 1

実際に必要なSDKプラットフォームがダウンロードされていることを確認してください。 SDKマネージャ自体をインストールするだけではそれはできません。

編集：Androidスタジオを使用している場合は、ツール - > Android - > SDKマネージャ - >外観&動作 - >システム設定 - > SDKプラットフォームに移動します。

そこから、ダウンロードする必要のあるAPIレベルのプラットフォームのチェックボックスをクリックして、適用する必要があります。