增加上传图片，从相册选取照片显示还有点问题

2025-07-19 01:21:18 +08:00
parent 85b902882c
commit fc42bb4af6
17 changed files with 791 additions and 9 deletions
--- a/app/src/main/java/com/ttstd/elderlyassistant/utils/FileUtils.java
+++ b/app/src/main/java/com/ttstd/elderlyassistant/utils/FileUtils.java
@@ -0,0 +1,76 @@
+package com.ttstd.elderlyassistant.utils;
+
+import android.content.ContentResolver;
+import android.content.Context;
+import android.database.Cursor;
+import android.net.Uri;
+import android.os.Build;
+import android.provider.MediaStore;
+import android.provider.OpenableColumns;
+import android.util.Log;
+
+import java.io.File;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+
+public class FileUtils {
+
+    public static File uriToFile(Context context, Uri uri) throws IOException {
+        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.Q) {
+            // Android 10 以下用 MediaStore 查询
+            File file = uriToFileLegacy(context, uri);
+            if (file != null) return file;
+        }
+        // Android 10+ 或查询失败时使用沙盒复制
+        return uriToFileModern(context, uri);
+    }
+
+    public static File uriToFileLegacy(Context context, Uri uri) {
+        String[] projection = {MediaStore.Images.Media.DATA};
+        try (Cursor cursor = context.getContentResolver().query(uri, projection, null, null, null)) {
+            if (cursor != null && cursor.moveToFirst()) {
+                int columnIndex = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
+                String filePath = cursor.getString(columnIndex);
+                return new File(filePath);
+            }
+        } catch (Exception e) {
+            Log.e("URI_TO_FILE", "Query failed: " + e.getMessage());
+        }
+        return null;
+    }
+
+    public static File uriToFileModern(Context context, Uri uri) throws IOException {
+        ContentResolver resolver = context.getContentResolver();
+        String fileName = getFileName(resolver, uri); // 获取文件名（见下文辅助方法）
+        File cacheDir = context.getExternalCacheDir(); // 建议使用缓存目录
+        File outputFile = new File(cacheDir, fileName);
+
+        try (InputStream is = resolver.openInputStream(uri);
+             OutputStream os = new FileOutputStream(outputFile)) {
+            byte[] buffer = new byte[1024];
+            int len;
+            while ((len = is.read(buffer)) != -1) {
+                os.write(buffer, 0, len);
+            }
+        }
+        return outputFile;
+    }
+
+    // 获取文件名辅助方法
+    private static String getFileName(ContentResolver resolver, Uri uri) {
+        String name = null;
+        if (ContentResolver.SCHEME_CONTENT.equals(uri.getScheme())) {
+            try (Cursor cursor = resolver.query(uri, null, null, null, null)) {
+                if (cursor != null && cursor.moveToFirst()) {
+                    name = cursor.getString(cursor.getColumnIndex(OpenableColumns.DISPLAY_NAME));
+                }
+            }
+        }
+        if (name == null) {
+            name = uri.getLastPathSegment(); // 备用方案
+        }
+        return name;
+    }
+}