Android文件选择器不是从Lollipop中的WebView或Marshmallow打开的

Question

我正在开发一个应用程序,它使用a WebView来访问某些逻辑.逻辑,有一个用户可以上传图片的部分,但是,我似乎找不到应用程序这样做的方法.
我正在使用的代码就是这个链接.

正如您将看到的那样,自定义Intent设置WebChromeClient,然而,文件选择器根本不打开.码:

public void openFileChooser(ValueCallback<Uri> uploadMsg, String acceptType){  

                // Update message
                mUploadMessage = uploadMsg;

                try{    

                    // Create AndroidExampleFolder at sdcard

                    File imageStorageDir = new File(
                                           Environment.getExternalStoragePublicDirectory(
                                           Environment.DIRECTORY_PICTURES)
                                           , "AndroidExampleFolder");

                    if (!imageStorageDir.exists()) {
                        // Create AndroidExampleFolder at sdcard
                        imageStorageDir.mkdirs();
                    }

                    // Create camera captured image file path and name 
                    File file = new File(
                                    imageStorageDir + File.separator + "IMG_"
                                    + String.valueOf(System.currentTimeMillis()) 
                                    + ".jpg");

                    mCapturedImageURI = Uri.fromFile(file); 

                    // Camera capture image intent
                    final Intent captureIntent = new Intent(
                                                  android.provider.MediaStore.ACTION_IMAGE_CAPTURE);

                    captureIntent.putExtra(MediaStore.EXTRA_OUTPUT, mCapturedImageURI);

                    Intent i = new Intent(Intent.ACTION_GET_CONTENT); 
                    i.addCategory(Intent.CATEGORY_OPENABLE);
                    i.setType("image/*");

                    // Create file chooser intent
                    Intent chooserIntent = Intent.createChooser(i, "Image Chooser");

                    // Set camera intent to file chooser 
                    chooserIntent.putExtra(Intent.EXTRA_INITIAL_INTENTS
                                           , new Parcelable[] { captureIntent });

                    // On select image call onActivityResult method of activity
                    startActivityForResult(chooserIntent, FILECHOOSER_RESULTCODE);

                  }
                 catch(Exception e){
                     Toast.makeText(getBaseContext(), "Exception:"+e, 
                                Toast.LENGTH_LONG).show();
                 }

            }

提前致谢!
编辑

因此,在@JoxTraex开悟了之后,我意识到文件选择器没有触发,因为我没有覆盖任何方法WebChromeClient.现在,文件选择器正在提示,但是,如果选择图像,则图像不会上传.
我用于文件选择器的代码:

@Override
            public boolean onShowFileChooser(WebView webView, ValueCallback<Uri[]> filePathCallback, FileChooserParams fileChooserParams) {
                openFileChooser(filePathCallback, "");
                return super.onShowFileChooser(webView, filePathCallback, fileChooserParams);
            }

            public void openFileChooser(ValueCallback<Uri[]> uploadMsg, String acceptType){
                // Update message
                //mUploadMessage = uploadMsg.this;
                try{
                    // Create AndroidExampleFolder at sdcard
                    File imageStorageDir = new File(
                            Environment.getExternalStoragePublicDirectory(
                                    Environment.DIRECTORY_PICTURES)
                            , "AndroidExampleFolder");

                    if (!imageStorageDir.exists()) {
                        // Create AndroidExampleFolder at sdcard
                        imageStorageDir.mkdirs();
                    }

                    // Create camera captured image file path and name
                    File file = new File(
                            imageStorageDir + File.separator + "IMG_"
                                    + String.valueOf(System.currentTimeMillis())
                                    + ".jpg");

                    mCapturedImageURI = Uri.fromFile(file);

                    // Camera capture image intent
                    final Intent captureIntent = new Intent(
                            android.provider.MediaStore.ACTION_IMAGE_CAPTURE);

                    captureIntent.putExtra(MediaStore.EXTRA_OUTPUT, mCapturedImageURI);

                    Intent i = new Intent(Intent.ACTION_GET_CONTENT);
                    i.addCategory(Intent.CATEGORY_OPENABLE);
                    i.setType("image/*");

                    // Create file chooser intent
                    Intent chooserIntent = Intent.createChooser(i, "Image Chooser");

                    // Set camera intent to file chooser
                    chooserIntent.putExtra(Intent.EXTRA_INITIAL_INTENTS
                            , new Parcelable[] { captureIntent });

                    // On select image call onActivityResult method of activity
                    startActivityForResult(chooserIntent, FILECHOOSER_RESULTCODE);

                }
                catch(Exception e){
                    Toast.makeText(getBaseContext(), "Exception:"+e,
                            Toast.LENGTH_LONG).show();
                }

            }

提前致谢!

Answer 1

好吧,在与一些听众挣扎之后,我找到了解决我情况的代码.不过,感谢@JoxTraex和这个家伙.

Answer 2

接受的答案是正确的，但如果它对任何人有帮助，我会发布我的代码。我使用了下面的代码，该代码将添加到 webChrome 类中。

public boolean onShowFileChooser(WebView view, ValueCallback<Uri[]> uploadMsg, WebChromeClient.FileChooserParams fileChooserParams) {
            mFilePathCallback = uploadMsg;
            Intent i = new Intent(Intent.ACTION_GET_CONTENT);
            i.addCategory(Intent.CATEGORY_OPENABLE);
            i.setType("image/*");
            startActivityForResult(Intent.createChooser(i, "File Chooser"), FILECHOOSER_RESULTCODE);
            return true;
        }

并使用onActivityResult中的代码

if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
        if (requestCode != FILECHOOSER_RESULTCODE || mFilePathCallback == null) {
            super.onActivityResult(requestCode, resultCode, intent);
            return;
        }
        Uri[] results = null;
        // Check that the response is a good one
        if (resultCode == Activity.RESULT_OK) {
                String dataString = intent.getDataString();
                if (dataString != null) {
                    results = new Uri[]{Uri.parse(dataString)};
            }
        }
        mFilePathCallback.onReceiveValue(results);
        mFilePathCallback = null;
    }

您还需要 Marshmallow 及更高版本的运行时权限。这段代码在 Lollipop 中可以正常工作。您还必须为其他 Android 版本添加条件才能使其在其他版本上运行