Use webview in Android to open the local file Selector

Button definition on the webpage <input tyoe = "file"/>

Method 1: it is also the most searched solution on the Internet.
Reference: http://stackoverflow.com/questions/4944102/android-webview-file-input-field-filechooser-doesnt-show-up
Http://m0s-programming.blogspot.tw/2011/02/file-upload-in-through-webview-on.html

       @Override      protected void onActivityResult(int requestCode, int resultCode, Intent data) {            if(requestCode==FILECHOOSER_RESULTCODE) {                 if (null == mUploadMessage) return;                          Uri result = data == null || resultCode != RESULT_OK ? null                                  : data.getData();                          mUploadMessage.onReceiveValue(result);                          mUploadMessage = null;                                          }          ｝

Add the following code to the webchromeclient setting:

        setting.setWebChromeClient(new WebChromeClient() {             // For Android 3.0+         public void openFileChooser(ValueCallback<Uri> uploadMsg, String acceptType) {                  if (mUploadMessage != null) return;                mUploadMessage = uploadMsg;                   Intent i = new Intent(Intent.ACTION_GET_CONTENT);                i.addCategory(Intent.CATEGORY_OPENABLE);                i.setType("*/*");                    startActivityForResult( Intent.createChooser( i, "File Chooser" ), BrowserActivity.FILECHOOSER_RESULTCODE );                 }             // For Android < 3.0         public void openFileChooser(ValueCallback<Uri> uploadMsg) {                openFileChooser( uploadMsg, "" );         }           });
        // For Android  > 4.1.1
       public void openFileChooser(ValueCallback<Uri> uploadMsg, String acceptType, String capture) {
               openFileChooser(uploadMsg, acceptType);
       }

Openfilechooser is a hidden method.
In this way, you can open a directory to upload files. However, in Versions later than 3.0, if the same webpage is opened in the android browser,
There are also functions of photography and recording, and then directly upload the generated image or audio file, so we need to use the following method.
Method 2: refer to the source code program from Com. Android. browser.

   @Override       protected void onActivityResult(int requestCode, int resultCode, Intent data) {            if(requestCode==FILECHOOSER_RESULTCODE) {                 if (null == mUploadMessage) return;                          Uri result = data == null || resultCode != RESULT_OK ? null                                  : data.getData();                            if (result == null && data == null && resultCode == Activity.RESULT_OK) {                            File cameraFile = new File(mCameraFilePath);                            if (cameraFile.exists()) {                                result = Uri.fromFile(cameraFile);                                // Broadcast to the media scanner that we have a new photo                                // so it will be added into the gallery for the user.                                sendBroadcast(                                        new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE, result));                                    }                             }                        mUploadMessage.onReceiveValue(result);                          mUploadMessage = null;              }          ｝

Add the following code to the webchromeclient setting:

setting.setWebChromeClient(new WebChromeClient() {             // For Android 3.0+         public void openFileChooser(ValueCallback<Uri> uploadMsg, String acceptType) {                  if (mUploadMessage != null) return;                mUploadMessage = uploadMsg;                startActivityForResult(createDefaultOpenableIntent(),                        BrowserActivity.FILECHOOSER_RESULTCODE);            }                 }             // For Android < 3.0         public void openFileChooser(ValueCallback<Uri> uploadMsg) {                openFileChooser( uploadMsg, "" );         }  });

private Intent createDefaultOpenableIntent() {           // Create and return a chooser with the default OPENABLE           // actions including the camera, camcorder and sound           // recorder where available.             Intent i = new Intent(Intent.ACTION_GET_CONTENT);             i.addCategory(Intent.CATEGORY_OPENABLE);             i.setType("*/*");             Intent chooser = createChooserIntent(createCameraIntent(), createCamcorderIntent(),                    createSoundRecorderIntent());            chooser.putExtra(Intent.EXTRA_INTENT, i);            return chooser;        }                private Intent createChooserIntent(Intent... intents) {            Intent chooser = new Intent(Intent.ACTION_CHOOSER);            chooser.putExtra(Intent.EXTRA_INITIAL_INTENTS, intents);            chooser.putExtra(Intent.EXTRA_TITLE, "File Chooser");           return chooser;          }    private Intent createCameraIntent() {          Intent cameraIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);          File externalDataDir = Environment.getExternalStoragePublicDirectory(                    Environment.DIRECTORY_DCIM);          File cameraDataDir = new File(externalDataDir.getAbsolutePath() +                    File.separator + "browser-photos");          cameraDataDir.mkdirs();          String mCameraFilePath = cameraDataDir.getAbsolutePath() + File.separator +                    System.currentTimeMillis() + ".jpg";          cameraIntent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(new File(mCameraFilePath)));          return cameraIntent;        }    private Intent createCamcorderIntent() {         return new Intent(MediaStore.ACTION_VIDEO_CAPTURE);        }    private Intent createSoundRecorderIntent() {         return new Intent(MediaStore.Audio.Media.RECORD_SOUND_ACTION);        }