如何在 webview android 4.4 及更高版本中启用多个文件上传

Question

我正在使用 html input 标签。我正在尝试上传最多 5 个文件。代码适用于单个文件上传。
如何在 webview android 4.4 及更高版本中启用多个文件上传？

intent.putExtra(Intent.EXTRA_ALLOW_MULTIPLE,true); 

这个只有多个允许选择文件，但它不起作用

ValueCallback<Uri> mUploadMessage;
final int FILECHOOSER_RESULTCODE = 3;
final int REQUEST_SELECT_FILE = 32;
ValueCallback uploadMessage;


@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    getWindow().requestFeature(Window.FEATURE_PROGRESS);
    setTheme(R.style.AppTheme);
    setContentView(R.layout.activity_main);

    Uri uriUrl = Uri.parse("https://contactde.com/");
    webview = findViewById(R.id.webView);
    webview.getSettings().setUseWideViewPort(true);

    webview.setWebChromeClient(new WebChromeClient() {
        @Override
        public void onProgressChanged(WebView view, int newProgress) {
            super.onProgressChanged(view, newProgress);
            if (newProgress >= 100) {
                pd.cancel();
            } else {
                pd.setMessage("Loading " + newProgress + "%");
                pd.show();
            }

        }

        @Override
        public void onGeolocationPermissionsShowPrompt(String origin,
                                                       GeolocationPermissions.Callback callback) {

            callback.invoke(origin, true, false);
        }


        // For Android 3.0+
        public void openFileChooser(ValueCallback uploadMsg, String acceptType) {
            mUploadMessage = uploadMsg;
            Intent i = new Intent(Intent.ACTION_GET_CONTENT);
            i.addCategory(Intent.CATEGORY_OPENABLE);
            i.setType("*/*");
            i.putExtra(Intent.EXTRA_ALLOW_MULTIPLE,true);
            MainActivity.this.startActivityForResult(Intent.createChooser(i, "File Browser"), FILECHOOSER_RESULTCODE);
        }

        //For Android 4.1+ only
        protected void openFileChooser(ValueCallback<Uri> uploadMsg, String acceptType, String capture) {
            mUploadMessage = uploadMsg;
            Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
            intent.putExtra(Intent.EXTRA_ALLOW_MULTIPLE,true);
            intent.addCategory(Intent.CATEGORY_OPENABLE);
            intent.setType("*/*");
            startActivityForResult(Intent.createChooser(intent, "File Browser"), FILECHOOSER_RESULTCODE);
        }

        protected void openFileChooser(ValueCallback<Uri> uploadMsg) {
            mUploadMessage = uploadMsg;
            Intent i = new Intent(Intent.ACTION_GET_CONTENT);
            i.putExtra(Intent.EXTRA_ALLOW_MULTIPLE,true);
            i.addCategory(Intent.CATEGORY_OPENABLE);
            i.setType("*/*");
            startActivityForResult(Intent.createChooser(i, "File Chooser"), FILECHOOSER_RESULTCODE);
        }

        // For Lollipop 5.0+ Devices
        public boolean onShowFileChooser(WebView mWebView, ValueCallback<Uri[]> filePathCallback, WebChromeClient.FileChooserParams fileChooserParams) {
            if (uploadMessage != null) {
                uploadMessage.onReceiveValue(null);
                uploadMessage = null;
            }

            uploadMessage = filePathCallback;
            Intent intent = null;
            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
                intent = fileChooserParams.createIntent();
                intent.putExtra(Intent.EXTRA_ALLOW_MULTIPLE,true);
            }
            try {
                startActivityForResult(intent, REQUEST_SELECT_FILE);
            } catch (ActivityNotFoundException e) {
                uploadMessage = null;
                Toast.makeText(getApplicationContext(), "Cannot Open File Chooser", Toast.LENGTH_LONG).show();
                return false;
            }
            return true;
        }

        @Override
        public boolean onJsAlert(WebView view, String url, String message, JsResult result) {

            Log.d("LogTag", message);
            result.confirm();
            return true;
        }

    });
    webview.setWebViewClient(new CustomWebViewClient());
    webview.getSettings().setJavaScriptEnabled(true);
    webview.getSettings().setGeolocationEnabled(true);
    webview.getSettings().setAllowFileAccess(true);
    webview.getSettings().setJavaScriptCanOpenWindowsAutomatically(true);

    webview.clearCache(true);
    webview.loadUrl(uriUrl.toString());


}


private class CustomWebViewClient extends WebViewClient {
    @Override
    public void onReceivedError(WebView view, WebResourceRequest request, WebResourceError error) {
        Toast.makeText(MainActivity.this, "Something Wrong", Toast.LENGTH_LONG).show();
    }

    @Override
    public boolean shouldOverrideUrlLoading(WebView wv, String url) {
        Log.e("Url", url);
        if (url.startsWith("tel:")) {
            Intent intent = new Intent(Intent.ACTION_DIAL);
            intent.setData(Uri.parse(url));
            startActivity(intent);
            return true;
        } else if (url != null && url.startsWith("https://wa.me/")) {
            Intent myIntent = new Intent(Intent.ACTION_VIEW, Uri.parse(url));
            startActivity(myIntent);
            return true;
        } else {
            return false;
        }
    }
}


@Override
public void onBackPressed() {
    if (webview.canGoBack()) {
        webview.goBack();
    } else {
        super.onBackPressed();
    }
}

@Override
public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {
    super.onRequestPermissionsResult(requestCode, permissions, grantResults);

    // Forward results to EasyPermissions
    EasyPermissions.onRequestPermissionsResult(requestCode, permissions, grantResults, this);
}

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    if (requestCode == REQUEST_SELECT_FILE) {
        if (uploadMessage == null) return;

        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
            uploadMessage.onReceiveValue(WebChromeClient.FileChooserParams.parseResult(resultCode, data));
        }
        uploadMessage = null;
    } else if (requestCode == FILECHOOSER_RESULTCODE) {
        if (null == mUploadMessage)
            return;
        // Use MainActivity.RESULT_OK if you're implementing WebView inside Fragment
        // Use RESULT_OK only if you're implementing WebView inside an Activity
        Uri result = data == null || resultCode != MainActivity.RESULT_OK ? null : data.getData();
        mUploadMessage.onReceiveValue(result);
        mUploadMessage = null;
    }
}

Answer 1

想通了

链接Here

然后添加

i.putExtra(Intent.EXTRA_ALLOW_MULTIPLE,true); 

Answer 2

用于从图库中选择多张图片

i.putExtra(Intent.EXTRA_ALLOW_MULTIPLE,true);

使用相机选项上传多张图片的终极解决方案，也适用于 Android Lollipop 到 Android 10、SDK 30。

private static final int FILECHOOSER_RESULTCODE   = 1;
private ValueCallback<Uri> mUploadMessage;
private ValueCallback<Uri[]> mUploadMessages;
private Uri mCapturedImageURI = null;

将此添加到 MainActivity 的 OnCreate

mWebView.setWebChromeClient(new WebChromeClient() {

            // openFileChooser for Android 3.0+

            public void openFileChooser(ValueCallback<Uri> uploadMsg, String acceptType){
                mUploadMessage = uploadMsg;
                openImageChooser();
            }

            // For Lollipop 5.0+ Devices

            public boolean onShowFileChooser(WebView mWebView, ValueCallback<Uri[]> filePathCallback, WebChromeClient.FileChooserParams fileChooserParams) {
                mUploadMessages = filePathCallback;
                openImageChooser();
                return true;
            }

            // openFileChooser for Android < 3.0

            public void openFileChooser(ValueCallback<Uri> uploadMsg){
                openFileChooser(uploadMsg, "");
            }

            //openFileChooser for other Android versions

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

private void openImageChooser() {
    try {
        File imageStorageDir = new File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES), "FolderName");
        if (!imageStorageDir.exists()) {
            imageStorageDir.mkdirs();
        }
        File file = new File(imageStorageDir + File.separator + "IMG_" + String.valueOf(System.currentTimeMillis()) + ".jpg");
        mCapturedImageURI = Uri.fromFile(file);

        final Intent captureIntent = new Intent(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/*");
        i.putExtra(Intent.EXTRA_ALLOW_MULTIPLE,true);
        Intent chooserIntent = Intent.createChooser(i, "Image Chooser");
        chooserIntent.putExtra(Intent.EXTRA_INITIAL_INTENTS, new Parcelable[]{captureIntent});

        startActivityForResult(chooserIntent, FILECHOOSER_RESULTCODE);
    } catch (Exception e) {
        e.printStackTrace();
    }
}

        });

onActivityResult

public void onActivityResult(final int requestCode, final int resultCode, final Intent data) {


        super.onActivityResult(requestCode, resultCode, data);
        if (requestCode == FILECHOOSER_RESULTCODE) {

            if (null == mUploadMessage && null == mUploadMessages) {
                return;
            }

            if (null != mUploadMessage) {
                handleUploadMessage(requestCode, resultCode, data);

            } else if (mUploadMessages != null) {
                handleUploadMessages(requestCode, resultCode, data);
            }
        }





    }

    private void handleUploadMessage(final int requestCode, final int resultCode, final Intent data) {
        Uri result = null;
        try {
            if (resultCode != RESULT_OK) {
                result = null;
            } else {
                // retrieve from the private variable if the intent is null

                result = data == null ? mCapturedImageURI : data.getData();
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
        mUploadMessage.onReceiveValue(result);
        mUploadMessage = null;

        // code for all versions except of Lollipop
        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.LOLLIPOP) {

                result = null;

                try {
                    if (resultCode != RESULT_OK) {
                        result = null;
                    } else {
                        // retrieve from the private variable if the intent is null
                        result = data == null ? mCapturedImageURI : data.getData();
                    }
                } catch (Exception e) {
                    Toast.makeText(getApplicationContext(), "activity :" + e, Toast.LENGTH_LONG).show();
                }

                mUploadMessage.onReceiveValue(result);
                mUploadMessage = null;
            }

        } // end of code for all versions except of Lollipop






    private void handleUploadMessages(final int requestCode, final int resultCode, final Intent data) {
        Uri[] results = null;
        try {
            if (resultCode != RESULT_OK) {
                results = null;
            } else {
                if (data != null) {
                    String dataString = data.getDataString();
                    ClipData clipData = data.getClipData();
                    if (clipData != null) {
                        results = new Uri[clipData.getItemCount()];
                        for (int i = 0; i < clipData.getItemCount(); i++) {
                            ClipData.Item item = clipData.getItemAt(i);
                            results[i] = item.getUri();
                        }
                    }
                    if (dataString != null) {
                        results = new Uri[]{Uri.parse(dataString)};
                    }
                } else {
                    results = new Uri[]{mCapturedImageURI};
                }
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
        mUploadMessages.onReceiveValue(results);
        mUploadMessages = null;
    }