Crosswalk Cordova Android multiple file select

Question

I have a hybrid app built using cordova and angularjs, for Android I run the app using crosswalk.

I\'ve been scouring the internet to find the solution for the html5 fi

Answer 1

After weeks of trying to sort this out, I finally got it to work (Cordova without Crosswalk). This was done using Cordova Tools in Windows so please pardon the filespecs below.

Step 1: Change the minSdkVersion in platforms\Android\CordovaLib\AndroidManifest.xml to 21 Explanation: onShowFileChooser API was introduced in LOLLIPOP (API 21). It allows returning url[] instead of url returned by showFileChooser in earlier API versions. This gets called only when you change the API to 21 or greater.

Step 2: Update/Replace the onActivityResult method to retrieve multiple files. Append the following after creating intent using fileChooserParams to allow choosing multiple files:

    intent.putExtra(Intent.EXTRA_ALLOW_MULTIPLE, true);

Location: platforms\android\CordovaLib\src\org\apache\cordova\engine\SystemWebChromeClient.java

Step 3: Update the corresponding onActivityResult method to return multiple urls using intent.getClipData().

Caveats:

1. Enables Multi-upload for all calls. You could update the intent based on fileChooserParams mode.
2. Disables Camera as a source in chooser which is available with crosswalk by default.

Final Code:

Uri photoUri;

@TargetApi(Build.VERSION_CODES.LOLLIPOP)
@Override
public boolean onShowFileChooser(WebView webView, final ValueCallback filePathsCallback, final WebChromeClient.FileChooserParams fileChooserParams) {
    // Check and use MIME Type.
    String mimeType = "*/*";
    int ACTION_CODE = FILECHOOSER_RESULTCODE;
    try {
        if (fileChooserParams.getAcceptTypes().length > 0) {
            mimeType = fileChooserParams.getAcceptTypes()[0];
        } else {
            mimeType = "*/*";
        }
    } catch (Exception e) {
        mimeType = "*/*";
    };

    // Check if Mutiple is specified 
    Boolean selectMultiple = false;
    if (fileChooserParams.getMode() == WebChromeClient.FileChooserParams.MODE_OPEN_MULTIPLE) {
        selectMultiple = true;
    };

    Intent intent = new Intent();
    intent.setAction(Intent.ACTION_GET_CONTENT);
    intent.addCategory(Intent.CATEGORY_OPENABLE);
    if (selectMultiple) { intent.putExtra(Intent.EXTRA_ALLOW_MULTIPLE, true); };
    intent.setType(mimeType);
    ACTION_CODE = FILECHOOSER_RESULTCODE;
    final Intent chooserIntent = Intent.createChooser(intent, "Select Source");

    // Add camera intent to the chooser if image and send URI to return full image 
    if (mimeType.equals("image/*")) {
        photoUri = null;
        try {
            File photoFile = createImageFile();
            photoUri = Uri.fromFile(photoFile);
        }
        catch (Exception ex) {
            photoUri = null;
        }
        if (photoUri != null) {
            Intent camIntent = new Intent();
            camIntent.setAction(MediaStore.ACTION_IMAGE_CAPTURE);
            camIntent.putExtra(MediaStore.EXTRA_OUTPUT, photoUri);
            camIntent.putExtra("return-data", true);
            chooserIntent.putExtra(Intent.EXTRA_INITIAL_INTENTS, new Intent [] {camIntent} );
        }
    }

    try {
        parentEngine.cordova.startActivityForResult(new CordovaPlugin() {
            @Override
            public void onActivityResult(int requestCode, int resultCode, Intent intent) {
                if (resultCode ==  Activity.RESULT_OK && intent != null) {
                    if (intent.getData() != null)
                    {
                        Uri[] result = WebChromeClient.FileChooserParams.parseResult(resultCode, intent);
                        filePathsCallback.onReceiveValue(result);
                    }
                    else
                    {
                        if (intent.getClipData() != null) {
                            final int numSelectedFiles = intent.getClipData().getItemCount();
                            Uri[] result = new Uri[numSelectedFiles];
                            for (int i = 0; i < numSelectedFiles; i++) {
                                result[i] = intent.getClipData().getItemAt(i).getUri();
                            }
                            filePathsCallback.onReceiveValue(result);
                        }
                        else {
                            filePathsCallback.onReceiveValue(null);
                        }
                    }
                }
                else if(resultCode ==  Activity.RESULT_OK && (intent == null || intent.getData() == null )) {
                    Uri[] result = new Uri[1];
                    result[0] = photoUri;
                    filePathsCallback.onReceiveValue(result);
                } else {
                    filePathsCallback.onReceiveValue(null);
                }
            }
        }, chooserIntent, ACTION_CODE);
    } catch (ActivityNotFoundException e) {
        Log.w("No activity found to handle file chooser intent.", e);
        filePathsCallback.onReceiveValue(null);
    }
    return true;
}