文件上传的逻辑002

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

@@ -246,31 +246,24 @@ 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
+     */
     private void downloadFile(String url) {
         new Thread(() -> {
             try {
                 if (TextUtils.isEmpty(url)) {
-                    Toast.makeText(this, "下载地址为空", Toast.LENGTH_SHORT).show();
+                    handler.post(() ->
+                            Toast.makeText(this, "下载地址为空", Toast.LENGTH_SHORT).show()
+                    );
                     return;
                 }
 
                 if (url.startsWith("blob:") || url.startsWith("data:")) {
-                    Toast.makeText(this, "无法直接下载 Blob 文件，请检查前端下载逻辑", Toast.LENGTH_SHORT).show();
+                    handler.post(() ->
+                            Toast.makeText(this, "无法直接下载 Blob 文件，请检查前端下载逻辑", Toast.LENGTH_SHORT).show()
+                    );
                     return;
                 }
 
@@ -296,16 +289,22 @@ public class FirstActivity extends BaseActivity {
 
                 DownloadManager dm = (DownloadManager) getSystemService(DOWNLOAD_SERVICE);
                 if (dm != null) {
-                    Toast.makeText(this, "文件已开始下载，请等待", Toast.LENGTH_SHORT).show();
+                    handler.post(() ->
+                            Toast.makeText(this, "文件已开始下载，请等待", Toast.LENGTH_SHORT).show()
+                    );
                     currentDownloadId = dm.enqueue(request);
                     startDownloadProgressMonitor(dm, currentDownloadId);
                 } else {
-                    Toast.makeText(this, "系统下载服务不可用", Toast.LENGTH_SHORT).show();
+                    handler.post(() ->
+                            Toast.makeText(this, "系统下载服务不可用", Toast.LENGTH_SHORT).show()
+                    );
                 }
 
             } catch (Exception e) {
                 e.printStackTrace();
-                Toast.makeText(this, "下载失败: " + e.getMessage(), Toast.LENGTH_SHORT).show();
+                handler.post(() ->
+                        Toast.makeText(this, "下载失败: " + e.getMessage(), Toast.LENGTH_SHORT).show()
+                );
             }
         }).start();
     }
@@ -314,48 +313,69 @@ public class FirstActivity extends BaseActivity {
      * ✅ 监控下载进度，每秒回调一次到前端
      */
     private void startDownloadProgressMonitor(DownloadManager dm, long downloadId) {
+        new Thread(() -> {
+            DownloadManager.Query query = new DownloadManager.Query();
+            query.setFilterById(downloadId);
+            boolean downloading = true;
 
-        DownloadManager.Query query = new DownloadManager.Query();
+            while (downloading) {
-        query.setFilterById(downloadId);
+                try {
-        boolean downloading = true;
+                    Thread.sleep(1000);
+                    android.database.Cursor cursor = dm.query(query);
+                    if (cursor != null && cursor.moveToFirst()) {
+                        int status = cursor.getInt(cursor.getColumnIndex(DownloadManager.COLUMN_STATUS));
+                        long total = cursor.getLong(cursor.getColumnIndex(DownloadManager.COLUMN_TOTAL_SIZE_BYTES));
+                        long downloaded = cursor.getLong(cursor.getColumnIndex(DownloadManager.COLUMN_BYTES_DOWNLOADED_SO_FAR));
 
-        while (downloading) {
+                        if (status == DownloadManager.STATUS_RUNNING && total > 0) {
-            try {
+                            int progress = (int) ((downloaded * 100L) / total);
-                Thread.sleep(1000);
+                            handler.post(() -> {
-                android.database.Cursor cursor = dm.query(query);
+                                sendProgressToJs(progress);
-                if (cursor != null && cursor.moveToFirst()) {
+                                // 可选：减少 toast 频率，比如每 20% 提示一次
-                    int status = cursor.getInt(cursor.getColumnIndex(DownloadManager.COLUMN_STATUS));
+                                if (progress % 20 == 0) {
-                    long total = cursor.getLong(cursor.getColumnIndex(DownloadManager.COLUMN_TOTAL_SIZE_BYTES));
+                                    Toast.makeText(this, "下载中：" + progress + "%", Toast.LENGTH_SHORT).show();
-                    long downloaded = cursor.getLong(cursor.getColumnIndex(DownloadManager.COLUMN_BYTES_DOWNLOADED_SO_FAR));
+                                }
-                    if (status == DownloadManager.STATUS_RUNNING && total > 0) {
+                            });
-                        int progress = (int) ((downloaded * 100L) / total);
+                        } else if (status == DownloadManager.STATUS_SUCCESSFUL) {
-                        Toast.makeText(this, "下载中，当前进度为" + progress + "%", Toast.LENGTH_SHORT).show();
+                            downloading = false;
-                        handler.post(() -> sendProgressToJs(progress));
+                            handler.post(() -> {
-                    } else if (status == DownloadManager.STATUS_SUCCESSFUL) {
+                                sendProgressToJs(100);
-                        Toast.makeText(this, "下载完成，请到文件管理查看", Toast.LENGTH_SHORT).show();
+                                Toast.makeText(this, "下载完成，请到文件管理查看", Toast.LENGTH_SHORT).show();
-                        downloading = false;
+                            });
-                        handler.post(() -> sendProgressToJs(100));
+                        } else if (status == DownloadManager.STATUS_FAILED) {
-                    } else if (status == DownloadManager.STATUS_FAILED) {
+                            downloading = false;
-                        Toast.makeText(this, "下载失败" + status + "," + total + "," + downloaded, Toast.LENGTH_SHORT).show();
+                            handler.post(() -> {
-                        downloading = false;
+                                sendProgressToJs(-1);
-                        handler.post(() -> sendProgressToJs(-1));
+                                Toast.makeText(this, "下载失败", Toast.LENGTH_SHORT).show();
+                            });
+                        }
+                        cursor.close();
                     }
-                    cursor.close();
+                } catch (Exception e) {
+                    e.printStackTrace();
+                    downloading = false;
+                    handler.post(() ->
+                            Toast.makeText(this, "监控异常：" + e.getMessage(), Toast.LENGTH_SHORT).show()
+                    );
                 }
-            } catch (Exception ignored) {
-                Toast.makeText(this, "文件已开始下载，请等待报错", Toast.LENGTH_SHORT).show();
             }
-        }
+        }).start();
     }
 
+    /**
+     * ✅ 向前端回调进度
+     */
     private void sendProgressToJs(int progress) {
         try {
             if (webView != null) {
                 String js = String.format("if(window.onDownloadProgress){window.onDownloadProgress(%d);}", progress);
                 webView.evaluateJavascript(js, null);
             }
-        } catch (Exception ignored) {
+        } catch (Exception e) {
-            Toast.makeText(this, "文件已开始下载，请等待报错sendProgressToJs", Toast.LENGTH_SHORT).show();
+            e.printStackTrace();
+            handler.post(() ->
+                    Toast.makeText(this, "进度回调异常：" + e.getMessage(), Toast.LENGTH_SHORT).show()
+            );
         }
     }
 
@@ -390,48 +410,55 @@ public class FirstActivity extends BaseActivity {
             }
         }
     }
-
     /**
-     * 上传文件到服务器
+     * ✅ 上传文件，并在上传成功后将 fileName、data、fileSize 传给前端
      */
     private void uploadFile(Uri uri) {
         new Thread(() -> {
             try {
-                // ✅ 修改为你的文件上传接口地址
+                // ✅ 上传接口地址
-//                String uploadUrl = "http://218.92.207.242:9678/file/upload"; // TODO: 替换为后端真实接口
-
                 String uploadUrl = "http://20.47.196.98:40080/fwzx/v1.0.0/getServiceInfoByServiceId/32092423SJNB12202507111046530001/320924230000-3-0800-5CDEC9969D674E1CBB7E2F86A697B0D7/api/file/upload";
 
-                String token = getToken(); // ✅ 从本地获取前端传来的 token
+                String token = getToken();
                 if (TextUtils.isEmpty(token)) {
                     runOnUiThread(() -> Toast.makeText(this, "请先登录后再上传", Toast.LENGTH_SHORT).show());
                     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
+                // ✅ 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()];
+                okhttp3.RequestBody fileBody = new okhttp3.RequestBody() {
-                inputStream.read(fileBytes);
+                    @Nullable
-                inputStream.close();
+                    @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();
+                    }
+                };
 
-                // 使用 OkHttp 上传
-                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)  // ✅ 添加 token 认证头
+                        .addHeader("accesstoken", token) // ✅ 带 token
                         .post(requestBody)
                         .build();
 
@@ -441,18 +468,16 @@ public class FirstActivity extends BaseActivity {
                     String result = response.body().string();
                     Log.d(TAG, "文件上传成功: " + result);
 
-                    // ✅ 提取 fileName 与后端返回的 data
+                    String safeResult = result.replace("'", "\\'");
-                    String safeResult = result.replace("'", "\\'"); // 避免 JS 语法错误
                     String safeFileName = fileName.replace("'", "\\'");
 
+                    // ✅ JS 回调 fileName、data、fileSize
                     runOnUiThread(() -> {
                         Toast.makeText(this, "上传成功", Toast.LENGTH_SHORT).show();
-
                         if (webView != null) {
-                            // ✅ 传 fileName 与 data 到前端
                             String jsCode = String.format(
-                                    "window.onFileUploadSuccess && window.onFileUploadSuccess({fileName: '%s', data: %s})",
+                                    "window.onFileUploadSuccess && window.onFileUploadSuccess({fileName: '%s', data: %s, fileSize: %d})",
-                                    safeFileName, safeResult
+                                    safeFileName, safeResult, fileSize
                             );
                             webView.evaluateJavascript(jsCode, null);
                         }
@@ -472,6 +497,37 @@ 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
      */