Android WebView Upload Picture via Camera

When clicking an Input File button on webview,
we want to take a picture from camera and place the image to that input.

1. Declare instance variables

private final static int CAPTURE_RESULTCODE = 1;
private ValueCallback<Uri> mUploadMessage;
private String filePath;

2. Set custom webChromeClient to WebView

myWebView.setWebChromeClient(new WebChromeClient() {				
	@SuppressWarnings("unused")
	public void openFileChooser(ValueCallback<Uri> uploadMsg, String acceptType, String capture) {
		openFileChooser(uploadMsg);
	}

	@SuppressWarnings("unused")
	public void openFileChooser(ValueCallback<Uri> uploadMsg, String acceptType) {
		openFileChooser(uploadMsg);
	}

	public void openFileChooser(ValueCallback<Uri> uploadMsg) {
		this.mUploadMessage = uploadMsg;

		File imageStorageDir = new File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES), "appName");
		this.filePath = imageStorageDir + File.separator + "IMG_" + String.valueOf(System.currentTimeMillis()) + ".jpg";
		File file = new File(this.filePath);

		Intent captureIntent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
		captureIntent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(file));
		MainActivity.this.startActivityForResult(captureIntent,  CAPTURE_RESULTCODE); 
	}
});

3. Apply onActivityResult to handle the picture after capture

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent intent) {
	if (requestCode == CAPTURE_RESULTCODE) {
		if (null == this.mUploadMessage || (resultCode != RESULT_OK && !new File(filePath).exists())) {
			this.mUploadMessage.onReceiveValue(null);
		} else {
			ContentValues values = new ContentValues();
			values.put(MediaStore.Images.Media.DATA, this.filePath);
			this.mUploadMessage.onReceiveValue(this.getContentResolver().insert(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, values));
		}
		this.mUploadMessage = null;
	}
}