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我正在使用 webview 运行我的网络应用程序，在我的应用程序中，我允许用户将图像上传到我的服务器，在 android > 3 上一切正常，在 Android 2.3.3 浏览器上它也可以按预期工作，但在webview 该文件未填充，并且我的服务器正在获取一个空对象。只有当我从相机拍照时才会发生这种情况（即常规画廊工作正常）。我注意到 Uri 与 file:/// 和 content:/// 不同

附件是我的代码：HTML（我的简单测试页面）：

<!DOCTYPE html>
<html>
<head>
  <meta name="viewport" content="width=device-width, initial-scale=1">
</head>

<body>
<form id="fuForm" name="fuForm" action="/questions/upload" method="POST" enctype="multipart/form-data">

    <label for="fileToUpload">Select a File to Upload</label><br />
    <input type="file" name="fileToUpload" id="fileToUpload"/>
    <input type="submit"/>
</form>
</body>
</html>

主要活动代码：

    webView = (WebView) findViewById(R.id.webview);
    webView.getSettings().setJavaScriptEnabled(true);
    webView.getSettings().setBuiltInZoomControls(true);
    webView.getSettings().setSavePassword(false);
    webView.getSettings().setSaveFormData(false);
    webView.setWebViewClient(new MyWebViewClient());
    webView.setWebChromeClient(new MyWebChromeViewClient());  
    webView.loadUrl(url);


    private class MyWebViewClient extends WebViewClient {
            @Override
            public boolean shouldOverrideUrlLoading(WebView view, String url) {
                view.loadUrl(url);
                return true;
            }
        }

        private class MyWebChromeViewClient extends WebChromeClient {
            //@Override
            public void openFileChooser(ValueCallback<Uri> uploadMsg, String acceptType )  {      
                 File imageStorageDir = new File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES), "MyApp");
                // Create the storage directory if it does not exist
                if (! imageStorageDir.exists()){
                    imageStorageDir.mkdirs();                  
                }
                File file = new File(imageStorageDir + File.separator + "IMG_" + String.valueOf(System.currentTimeMillis()) + ".jpg");  
                imageUri = Uri.fromFile(file); 

                final List<Intent> cameraIntents = new ArrayList<Intent>();
                final Intent captureIntent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
                final PackageManager packageManager = getPackageManager();
                final List<ResolveInfo> listCam = packageManager.queryIntentActivities(captureIntent, 0);
                for(ResolveInfo res : listCam) {
                    final String packageName = res.activityInfo.packageName;
                    final Intent intent = new Intent(captureIntent);
                    intent.setComponent(new ComponentName(res.activityInfo.packageName, res.activityInfo.name));
                    intent.setPackage(packageName);
                    intent.putExtra(MediaStore.EXTRA_OUTPUT, imageUri);
                    cameraIntents.add(intent);
                }


                uploadMessage = uploadMsg; 
                Intent intent = new Intent(Intent.ACTION_GET_CONTENT);  
                intent.addCategory(Intent.CATEGORY_OPENABLE);  
                intent.setType("image/*"); 
                Intent chooserIntent = Intent.createChooser(intent,"Image Chooser");
                chooserIntent.putExtra(Intent.EXTRA_INITIAL_INTENTS, cameraIntents.toArray(new Parcelable[]{}));
                activity.startActivityForResult(chooserIntent,  FILECHOOSER_RESULTCODE); 
            }

   // For Android < 3.0
        @SuppressWarnings("unused")
        public void openFileChooser(ValueCallback<Uri> uploadMsg) {
            openFileChooser(uploadMsg, "");
        }

    }

   @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent intent) {
        // super.onActivityResult(requestCode, resultCode, intent);
        if (resultCode == RESULT_OK && requestCode == FILECHOOSER_RESULTCODE) {
            if (null == uploadMessage)
                return;
            final boolean isCamera;
            if (intent == null) {
                isCamera = true;
            } else {
                final String action = intent.getAction();
                if (action == null) {
                    isCamera = false;
                } else {
                    isCamera = action
                            .equals(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
                }
            }
            Uri result;
            if (isCamera) {
                result = imageUri;
            } else {
                result = intent == null ? null : intent.getData();
            }
            uploadMessage.onReceiveValue(result);
        } else {
            uploadMessage.onReceiveValue(null);
        }
        uploadMessage = null;
    }

任何帮助将不胜感激...

乔。

4

1 回答 1

0

我遇到了同样的问题，但经过长时间的研究，我自己找到了解决方案。

在 Android 2.3.3 上，webview 不支持带有文件协议 (file:///) 的 Uri。在调用uploadMessage.onReceiveValue之前，我们需要将图片的Uri转换为内容协议Uri(content:///)。下面代码中的变量imageFilePath是摄像头采集到的图片文件的绝对路径。

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent intent) {
    // super.onActivityResult(requestCode, resultCode, intent);
    if (resultCode == RESULT_OK && requestCode == FILECHOOSER_RESULTCODE) {
        if (null == uploadMessage)
            return;
        final boolean isCamera;
        if (intent == null) {
            isCamera = true;
        } else {
            final String action = intent.getAction();
            if (action == null) {
                isCamera = false;
            } else {
                isCamera = action.equals(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
            }
        }
        Uri result;
        if (isCamera) {
            **String mediaUri =MediaStore.Images.Media.insertImage(getContentResolver(),imageFilePath,"","");
            result = Uri.parse(mediaUri);**
        } else {
            result = intent == null ? null : intent.getData();
        }
        uploadMessage.onReceiveValue(result);
    } else {
        uploadMessage.onReceiveValue(null);
    }
    uploadMessage = null;
}
于 2013-07-22T14:29:37.897 回答