背景：有个html页面，用html里面自带的<input type =file/>上传文件(图片，word，Excel等)浏览器直接打开可以上传，
套壳在Android app里面，点击文件上传没反应，修改Android代码，可以实现相应功能，亲测有效。
1、在oncreate 方法上面 加入以下代码：
1 private static final int REQUEST_STORAGE = 1;2 private static final int REQUEST_LOCATION = 2;3 public ValueCallback<Uri> mUploadMessage;4 public static final int FILECHOOSER_RESULTCODE = 5173;
2、添加以下方法：
1 webView.setWebChromeClient(new WebChromeClient() { 2 3 // For Android 3.0+ 4 public void openFileChooser(ValueCallback<Uri> uploadMsg) { 5 6 mUploadMessage = uploadMsg; 7 Intent i = new Intent(Intent.ACTION_GET_CONTENT); 8 i.addCategory(Intent.CATEGORY_OPENABLE); 9 i.setType("image/*");10 MainActivity.this.startActivityForResult(Intent.createChooser(i,"File Chooser"), FILECHOOSER_RESULTCODE);11 12 }13 14 // For Android 3.0+15 public void openFileChooser( ValueCallback uploadMsg, String acceptType ) {16 mUploadMessage = uploadMsg;17 Intent i = new Intent(Intent.ACTION_GET_CONTENT);18 i.addCategory(Intent.CATEGORY_OPENABLE);19 i.setType("*/*");20 MainActivity.this.startActivityForResult(21 Intent.createChooser(i, "File Browser"),22 FILECHOOSER_RESULTCODE);23 }24 25 //For Android 4.126 public void openFileChooser(ValueCallback<Uri> uploadMsg, String acceptType, String capture){27 mUploadMessage = uploadMsg;28 Intent i = new Intent(Intent.ACTION_GET_CONTENT);29 i.addCategory(Intent.CATEGORY_OPENABLE);30 i.setType("image/*");31 MainActivity.this.startActivityForResult( Intent.createChooser( i, "File Chooser" ), MainActivity.FILECHOOSER_RESULTCODE );32 }33 34 public boolean onShowFileChooser(35 WebView webView, ValueCallback<Uri[]> filePathCallback,36 FileChooserParams fileChooserParams) {37 if (mUMA != null) {38 mUMA.onReceiveValue(null);39 }40 mUMA = filePathCallback;41 Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);42 if (takePictureIntent.resolveActivity(MainActivity .this.getPackageManager()) != null) {43 File photoFile = null;44 try {45 photoFile = createImageFile();46 takePictureIntent.putExtra("PhotoPath", mCM);47 } catch (IOException ex) {48 //Log.e(TAG, "Image file creation failed", ex);49 }50 if (photoFile != null) {51 mCM = "file:" + photoFile.getAbsolutePath();52 takePictureIntent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(photoFile));53 } else {54 takePictureIntent = null;55 }56 }57 58 Intent contentSelectionIntent = new Intent(Intent.ACTION_GET_CONTENT);59 contentSelectionIntent.addCategory(Intent.CATEGORY_OPENABLE);60 contentSelectionIntent.setType("*/*");61 Intent[] intentArray;62 if (takePictureIntent != null) {63 intentArray = new Intent[]{takePictureIntent};64 } else {65 intentArray = new Intent[0];66 }67 Intent chooserIntent = new Intent(Intent.ACTION_CHOOSER);68 chooserIntent.putExtra(Intent.EXTRA_INTENT, contentSelectionIntent);69 chooserIntent.putExtra(Intent.EXTRA_TITLE, "Image Chooser");70 chooserIntent.putExtra(Intent.EXTRA_INITIAL_INTENTS, intentArray);71 startActivityForResult(chooserIntent, FCR);72 return true;73 }74 });
3、添加方法：
1 // Create an image file2 private File createImageFile() throws IOException {3 @SuppressLint("SimpleDateFormat") String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new java.util.Date());4 String imageFileName = "img_" + timeStamp + "_";5 File storageDir = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES);6 return File.createTempFile(imageFileName, ".jpg", storageDir);7 }
4、onActivityResult
1 @Override 2 protected void onActivityResult(int requestCode, int resultCode, Intent data) { 3 // TODO Auto-generated method stub 4 super.onActivityResult(requestCode, resultCode, data); 5 6 if(requestCode==FILECHOOSER_RESULTCODE) { 7 if (null == mUploadMessage) return; 8 Uri result = data == null || resultCode != RESULT_OK ? null 9 : data.getData();10 mUploadMessage.onReceiveValue(result);11 mUploadMessage = null;12 }13 14 if (Build.VERSION.SDK_INT >= 21) {15 Uri[] results = null;16 //Check if response is positive17 if (resultCode == Activity.RESULT_OK) {18 if (requestCode == FCR) {19 if (null == mUMA) {20 return;21 }22 if (data == null) {23 //Capture Photo if no image available24 if (mCM != null) {25 results = new Uri[]{Uri.parse(mCM)};26 }27 } else {28 String dataString = data.getDataString();29 if (dataString != null) {30 results = new Uri[]{Uri.parse(dataString)};31 }32 }33 mUMA.onReceiveValue(results);34 mUMA = null;35 }36 }37 } else {38 if (requestCode == FCR) {39 if (null == mUM) return;40 Uri result = data == null || resultCode != RESULT_OK ? null : data.getData();41 mUM.onReceiveValue(result);42 mUM = null;43 }44 }45 }
参考：https://www.zidsworld.com/android-development/make-android-webview-support-file-upload/