Java library (#1869)

Summary:
Pull Request resolved: #1869

The demo app can be built with internal build system after this.

Reviewed By: mcr229

Differential Revision: D53240967

fbshipit-source-id: 64966c5017cc4f8ee7e841e3481641320715d53b

Author: kirklandsign

examples/demo-apps/android/ExecuTorchDemo/app/src/main/AndroidManifest.xml

@@ -1,9 +1,13 @@
 <?xml version="1.0" encoding="utf-8"?>
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
-    xmlns:tools="http://schemas.android.com/tools">
+    xmlns:tools="http://schemas.android.com/tools"
+    package="com.example.executorchdemo">
+
+    <uses-sdk android:minSdkVersion="19"
+          android:targetSdkVersion="34"
+          android:maxSdkVersion="40" />
 
     <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
-    <uses-permission android:name="android.permission.CAMERA" />
 
     <application
         android:allowBackup="true"
@@ -15,7 +19,7 @@
         android:supportsRtl="true"
         android:theme="@style/Theme.ExecuTorchDemo"
         android:extractNativeLibs="true"
-        tools:targetApi="31">
+        tools:targetApi="34">
 
         <uses-native-library android:name="libexecutorchdemo.so"
             android:required="false"/>

examples/demo-apps/android/ExecuTorchDemo/app/src/main/java/com/example/executorchdemo/ClassificationActivity.java

@@ -18,11 +18,11 @@
 import android.widget.Button;
 import android.widget.ImageView;
 import android.widget.TextView;
-import com.example.executorchdemo.executor.EValue;
-import com.example.executorchdemo.executor.Module;
-import com.example.executorchdemo.executor.Tensor;
-import com.example.executorchdemo.executor.TensorImageUtils;
 import java.io.IOException;
+import org.pytorch.executorch.EValue;
+import org.pytorch.executorch.Module;
+import org.pytorch.executorch.Tensor;
+import org.pytorch.executorch.TensorImageUtils;
 
 public class ClassificationActivity extends Activity implements Runnable {
 

examples/demo-apps/android/ExecuTorchDemo/app/src/main/java/com/example/executorchdemo/MainActivity.java

@@ -21,16 +21,16 @@
 import android.widget.Button;
 import android.widget.ImageView;
 import android.widget.ProgressBar;
-import com.example.executorchdemo.executor.EValue;
-import com.example.executorchdemo.executor.Module;
-import com.example.executorchdemo.executor.Tensor;
-import com.example.executorchdemo.executor.TensorImageUtils;
 import java.io.File;
 import java.io.FileOutputStream;
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.OutputStream;
 import java.util.Objects;
+import org.pytorch.executorch.EValue;
+import org.pytorch.executorch.Module;
+import org.pytorch.executorch.Tensor;
+import org.pytorch.executorch.TensorImageUtils;
 
 public class MainActivity extends Activity implements Runnable {
   private ImageView mImageView;

examples/demo-apps/android/ExecuTorchDemo/app/src/main/res/values/styles.xml

@@ -7,4 +7,4 @@
         <item name="colorAccent">@color/colorAccent</item>
     </style>
 
-</resources>
+</resources>

extension/android/src/main/java/org/pytorch/executorch/DType.java

@@ -0,0 +1,69 @@
+/*
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ * All rights reserved.
+ *
+ * This source code is licensed under the BSD-style license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+package org.pytorch.executorch;
+
+/** Codes representing tensor data types. */
+public enum DType {
+  // NOTE: "jniCode" must be kept in sync with scalar_type.h.
+  // NOTE: Never serialize "jniCode", because it can change between releases.
+
+  /** Code for dtype torch::executor::Byte */
+  UINT8(0),
+  /** Code for dtype torch::executor::Char */
+  INT8(1),
+  /** Code for dtype torch::executor::Short */
+  INT16(2),
+  /** Code for dtype torch::executor::Int */
+  INT32(3),
+  /** Code for dtype torch::executor::Long */
+  INT64(4),
+  /** Code for dtype torch::executor::Half */
+  HALF(5),
+  /** Code for dtype torch::executor::Float */
+  FLOAT(6),
+  /** Code for dtype torch::executor::Double */
+  DOUBLE(7),
+  /** Code for dtype torch::executor::ComplexHalf */
+  COMPLEX_HALF(8),
+  /** Code for dtype torch::executor::ComplexFloat */
+  COMPLEX_FLOAT(9),
+  /** Code for dtype torch::executor::ComplexDouble */
+  COMPLEX_DOUBLE(10),
+  /** Code for dtype torch::executor::Bool */
+  BOOL(11),
+  /** Code for dtype torch::executor::QInt8 */
+  QINT8(12),
+  /** Code for dtype torch::executor::QUInt8 */
+  QUINT8(13),
+  /** Code for dtype torch::executor::QInt32 */
+  QINT32(14),
+  /** Code for dtype torch::executor::BFloat16 */
+  BFLOAT16(15),
+  /** Code for dtype torch::executor::QUInt4x2 */
+  QINT4X2(16),
+  /** Code for dtype torch::executor::QUInt2x4 */
+  QINT2X4(17),
+  /** Code for dtype torch::executor::Bits1x8 */
+  BITS1X8(18),
+  /** Code for dtype torch::executor::Bits2x4 */
+  BITS2X4(19),
+  /** Code for dtype torch::executor::Bits4x2 */
+  BITS4X2(20),
+  /** Code for dtype torch::executor::Bits8 */
+  BITS8(21),
+  /** Code for dtype torch::executor::Bits16 */
+  BITS16(22),
+  ;
+
+  final int jniCode;
+
+  DType(int jniCode) {
+    this.jniCode = jniCode;
+  }
+}