更新读取Assets文件方法

app/src/main/java/com/agenew/mnist/Utils.java

@@ -2,7 +2,7 @@ package com.agenew.mnist;
 
 import android.content.Context;
 import android.content.res.AssetFileDescriptor;
-import android.content.res.AssetManager;
+import android.util.Log;
 
 import java.io.FileInputStream;
 import java.io.IOException;
@@ -10,16 +10,51 @@ import java.nio.MappedByteBuffer;
 import java.nio.channels.FileChannel;
 
 public class Utils {
+	private static final String TAG = "Utils";
 	public static final int PIXEL_SIZE = 28;
 	private static final String MODEL_FILE = "mnist.tflite";
 
 	public static MappedByteBuffer loadModelFile(Context context) throws IOException {
-		AssetManager assets = context.getAssets();
-		AssetFileDescriptor fileDescriptor = assets.openFd(MODEL_FILE);
-		FileInputStream inputStream = new FileInputStream(fileDescriptor.getFileDescriptor());
-		FileChannel fileChannel = inputStream.getChannel();
-		long startOffset = fileDescriptor.getStartOffset();
-		long declaredLength = fileDescriptor.getDeclaredLength();
-		return fileChannel.map(FileChannel.MapMode.READ_ONLY, startOffset, declaredLength);
+		return loadMappedFile(context, MODEL_FILE);
+	}
+
+	public static MappedByteBuffer loadMappedFile(Context context, String filePath) throws IOException {
+		AssetFileDescriptor fileDescriptor = context.getAssets().openFd(filePath);
+		MappedByteBuffer result = null;
+		try {
+			FileInputStream inputStream = new FileInputStream(fileDescriptor.getFileDescriptor());
+
+			try {
+				FileChannel fileChannel = inputStream.getChannel();
+				long startOffset = fileDescriptor.getStartOffset();
+				long declaredLength = fileDescriptor.getDeclaredLength();
+				result = fileChannel.map(FileChannel.MapMode.READ_ONLY, startOffset, declaredLength);
+			} catch (Throwable e) {
+				try {
+					inputStream.close();
+				} catch (Throwable e1) {
+					e.addSuppressed(e1);
+				}
+
+				throw e;
+			} finally {
+				inputStream.close();
+			}
+		} catch (Throwable e) {
+			if (fileDescriptor != null) {
+				try {
+					fileDescriptor.close();
+				} catch (Throwable e1) {
+					e.addSuppressed(e1);
+				}
+			}
+			Log.e(TAG, "WL_DEBUG loadMappedFile e = " + e, e);
+		} finally {
+			if (fileDescriptor != null) {
+				fileDescriptor.close();
+			}
+		}
+
+		return result;
 	}
 }