文件上传的逻辑

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

@@ -24,6 +24,13 @@ import android.widget.Toast;
 import androidx.annotation.Nullable;
 import androidx.annotation.RequiresApi;
 
+import android.app.Activity;
+import android.content.Intent;          // ← 文件选择核心类
+import android.database.Cursor;        // ← 解析文件信息
+import android.provider.OpenableColumns; // ← 获取文件名、大小
+
+import org.json.JSONObject;
+
 import java.io.IOException;
 import java.io.InputStream;
 import java.lang.ref.WeakReference;
@@ -239,6 +246,19 @@ 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
 
     private void downloadFile(String url) {
@@ -275,6 +295,7 @@ 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();
                 currentDownloadId = dm.enqueue(request);
                 startDownloadProgressMonitor(dm, currentDownloadId);
             } else {
@@ -298,7 +319,6 @@ public class FirstActivity extends BaseActivity {
 
         while (downloading) {
             try {
-                Toast.makeText(this, "文件已开始下载，请等待", Toast.LENGTH_SHORT).show();
                 Thread.sleep(1000);
                 android.database.Cursor cursor = dm.query(query);
                 if (cursor != null && cursor.moveToFirst()) {
@@ -337,6 +357,160 @@ public class FirstActivity extends BaseActivity {
         }
     }
 
+// ==============================
+// 文件选择与上传逻辑（新增部分）
+// ==============================
+
+    private static final int REQUEST_CODE_FILE_CHOOSER = 2001;
+
+    /**
+     * JS 调用此方法选择文件
+     */
+    @JavascriptInterface
+    public void chooseFile() {
+        Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
+        intent.setType("*/*");
+        intent.addCategory(Intent.CATEGORY_OPENABLE);
+        startActivityForResult(Intent.createChooser(intent, "选择要上传的文件"), REQUEST_CODE_FILE_CHOOSER);
+    }
+
+    /**
+     * 文件选择结果回调
+     */
+    @Override
+    protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {
+        super.onActivityResult(requestCode, resultCode, data);
+        if (requestCode == REQUEST_CODE_FILE_CHOOSER && resultCode == RESULT_OK && data != null) {
+            Uri uri = data.getData();
+            if (uri != null) {
+                Toast.makeText(this, "文件已选择，开始上传...", Toast.LENGTH_SHORT).show();
+                uploadFile(uri);  // 自动上传文件
+            }
+        }
+    }
+
+    /**
+     * 上传文件到服务器
+     */
+    private void uploadFile(Uri uri) {
+        new Thread(() -> {
+            try {
+                // ✅ 修改为你的文件上传接口地址
+//                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
+                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
+                String fileName = getFileNameFromUri(uri);
+                if (TextUtils.isEmpty(fileName)) fileName = "upload_file";
+
+                // 读取文件内容
+                InputStream inputStream = getContentResolver().openInputStream(uri);
+                byte[] fileBytes = new byte[inputStream.available()];
+                inputStream.read(fileBytes);
+                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.Request request = new okhttp3.Request.Builder()
+                        .url(uploadUrl)
+                        .addHeader("accesstoken", token)  // ✅ 添加 token 认证头
+                        .post(requestBody)
+                        .build();
+
+                okhttp3.Response response = client.newCall(request).execute();
+
+                if (response.isSuccessful()) {
+                    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("'", "\\'"); // 避免 JS 语法错误
+                    String safeFileName = fileName.replace("'", "\\'");
+
+                    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})",
+                                    safeFileName, safeResult
+                            );
+                            webView.evaluateJavascript(jsCode, null);
+                        }
+                    });
+                } else {
+                    runOnUiThread(() ->
+                            Toast.makeText(this, "上传失败: " + response.code(), Toast.LENGTH_LONG).show()
+                    );
+                }
+
+            } catch (Exception e) {
+                e.printStackTrace();
+                runOnUiThread(() ->
+                        Toast.makeText(this, "上传异常: " + e.getMessage(), Toast.LENGTH_LONG).show()
+                );
+            }
+        }).start();
+    }
+
+    /**
+     * 从 Uri 获取文件名
+     */
+    private String getFileNameFromUri(Uri uri) {
+        String result = null;
+        if ("content".equals(uri.getScheme())) {
+            try (android.database.Cursor cursor = getContentResolver().query(uri, null, null, null, null)) {
+                if (cursor != null && cursor.moveToFirst()) {
+                    result = cursor.getString(cursor.getColumnIndexOrThrow(android.provider.OpenableColumns.DISPLAY_NAME));
+                }
+            }
+        }
+        if (result == null) {
+            result = uri.getPath();
+            int cut = result.lastIndexOf('/');
+            if (cut != -1) result = result.substring(cut + 1);
+        }
+        return result;
+    }
+
+// ==============================
+// ✅ 新增：存储与获取 token 的方法
+// ==============================
+
+    private static final String KEY_TOKEN = "USER_TOKEN";
+
+    // JS 传入 token
+    @JavascriptInterface
+    public void setToken(String token) {
+        if (!TextUtils.isEmpty(token)) {
+            SpUtils.putString(this, KEY_TOKEN, token);
+            Log.d(TAG, "已保存 token: " + token);
+        }
+    }
+
+    // 获取本地 token
+    private String getToken() {
+        return SpUtils.getString(this, KEY_TOKEN, "");
+    }
+
+
     public static class JsBridge {
         private final WeakReference<FirstActivity> activityRef;
 
@@ -370,6 +544,32 @@ public class FirstActivity extends BaseActivity {
             }
         }
 
+        // ✅ 供前端调用的文件选择方法
+        @JavascriptInterface
+        public void chooseFile() {
+            FirstActivity activity = activityRef.get();
+            if (activity != null) {
+                activity.runOnUiThread(activity::chooseFile);
+            }
+        }
+
+        // ✅ 供前端调用的文件选择方法
+        @JavascriptInterface
+        public void previewFile(String url) {
+            FirstActivity activity = activityRef.get();
+            if (activity != null && !TextUtils.isEmpty(url)) {
+                activity.runOnUiThread(() -> activity.previewFile(url));
+            }
+        }
+
+        // ✅ 供前端调用的文件选择方法
+        @JavascriptInterface
+        public void setToken(String token) {
+            FirstActivity activity = activityRef.get();
+            if (activity != null && !TextUtils.isEmpty(token)) {
+                activity.runOnUiThread(() -> activity.setToken(token));
+            }
+        }
         @JavascriptInterface
         public void showLog(String message) {
             FirstActivity activity = activityRef.get();