文件上传的逻辑002

app/src/main/java/com/pxkj/jwzs/FirstActivity.java

@@ -246,19 +246,6 @@ public class FirstActivity extends BaseActivity {
 //                || url.contains("/api/file/");
     }
 
-    private void previewFile(String url) {
-        try {
-            if (webView != null) {
-                webView.loadUrl(url);
-            }
-
-            Toast.makeText(this, "正在打开文件预览...", Toast.LENGTH_SHORT).show();
-        } catch (Exception e) {
-            e.printStackTrace();
-            Toast.makeText(this, "预览文件失败: " + e.getMessage(), Toast.LENGTH_LONG).show();
-        }
-    }
-
     private long currentDownloadId = -1; // 保存当前下载任务ID
     /**
      * ✅ 下载文件并调用系统 DownloadManager
@@ -429,7 +416,7 @@ public class FirstActivity extends BaseActivity {
     private void uploadFile(Uri uri) {
         new Thread(() -> {
             try {
-                // ✅ 上传接口
+                // ✅ 上传接口地址
                 String uploadUrl = "http://20.47.196.98:40080/fwzx/v1.0.0/getServiceInfoByServiceId/32092423SJNB12202507111046530001/320924230000-3-0800-5CDEC9969D674E1CBB7E2F86A697B0D7/api/file/upload";
 
                 String token = getToken();
@@ -438,32 +425,40 @@ public class FirstActivity extends BaseActivity {
                     return;
                 }
 
-                // ✅ 获取文件名
+                // ✅ 获取文件名和大小
                 String fileName = getFileNameFromUri(uri);
                 if (TextUtils.isEmpty(fileName)) fileName = "upload_file";
+                long fileSize = getFileSizeFromUri(uri);
 
-                // ✅ 读取文件内容并计算文件大小
+                // ✅ 使用流式读取方式构建 RequestBody（防止 OOM）
                 InputStream inputStream = getContentResolver().openInputStream(uri);
-                byte[] fileBytes = new byte[inputStream.available()];
-                inputStream.read(fileBytes);
+                okhttp3.RequestBody fileBody = new okhttp3.RequestBody() {
+                    @Nullable
+                    @Override
+                    public okhttp3.MediaType contentType() {
+                        return okhttp3.MediaType.parse("application/octet-stream");
+                    }
+
+                    @Override
+                    public void writeTo(okio.BufferedSink sink) throws IOException {
+                        byte[] buffer = new byte[4096];
+                        int bytesRead;
+                        while ((bytesRead = inputStream.read(buffer)) != -1) {
+                            sink.write(buffer, 0, bytesRead);
+                        }
                         inputStream.close();
+                    }
+                };
 
-                long fileSize = fileBytes.length; // 文件大小（字节）
-
-                // ✅ 构建 OkHttp 上传请求
-                okhttp3.OkHttpClient client = new okhttp3.OkHttpClient();
-                okhttp3.RequestBody fileBody = okhttp3.RequestBody.create(
-                        okhttp3.MediaType.parse("application/octet-stream"),
-                        fileBytes
-                );
                 okhttp3.MultipartBody requestBody = new okhttp3.MultipartBody.Builder()
                         .setType(okhttp3.MultipartBody.FORM)
                         .addFormDataPart("file", fileName, fileBody)
                         .build();
 
+                okhttp3.OkHttpClient client = new okhttp3.OkHttpClient();
                 okhttp3.Request request = new okhttp3.Request.Builder()
                         .url(uploadUrl)
-                        .addHeader("accesstoken", token) // ✅ 加 token
+                        .addHeader("accesstoken", token) // ✅ 带 token
                         .post(requestBody)
                         .build();
 
@@ -476,13 +471,12 @@ public class FirstActivity extends BaseActivity {
                     String safeResult = result.replace("'", "\\'");
                     String safeFileName = fileName.replace("'", "\\'");
 
-                    // ✅ JS 回调：fileName、data、fileSize
+                    // ✅ JS 回调 fileName、data、fileSize
                     runOnUiThread(() -> {
                         Toast.makeText(this, "上传成功", Toast.LENGTH_SHORT).show();
-
                         if (webView != null) {
                             String jsCode = String.format(
-                                    "window.onFileUploadSuccess && window.onFileUploadSuccess({fileName: '%s', data: %s, fileSize: %.2f})",
+                                    "window.onFileUploadSuccess && window.onFileUploadSuccess({fileName: '%s', data: %s, fileSize: %d})",
                                     safeFileName, safeResult, fileSize
                             );
                             webView.evaluateJavascript(jsCode, null);
@@ -503,6 +497,36 @@ public class FirstActivity extends BaseActivity {
         }).start();
     }
 
+    /**
+     * ✅ 获取文件大小（兼容 content:// 与 file://）
+     */
+    private long getFileSizeFromUri(Uri uri) {
+        long fileSize = 0L;
+        if ("content".equals(uri.getScheme())) {
+            try (Cursor cursor = getContentResolver().query(uri, null, null, null, null)) {
+                if (cursor != null && cursor.moveToFirst()) {
+                    int sizeIndex = cursor.getColumnIndex(OpenableColumns.SIZE);
+                    if (sizeIndex != -1) {
+                        fileSize = cursor.getLong(sizeIndex);
+                    }
+                }
+            } catch (Exception e) {
+                e.printStackTrace();
+            }
+        }
+        if (fileSize <= 0) {
+            // 尝试从 File 读取
+            String path = uri.getPath();
+            if (path != null) {
+                java.io.File file = new java.io.File(path);
+                if (file.exists()) {
+                    fileSize = file.length();
+                }
+            }
+        }
+        return fileSize;
+    }
+
 
     /**
      * 从 Uri 获取文件名