WebView <input type="file"> 처리방법

처리방법의 중요골자는 openFileChooser 라는 hidden method를 통해 file tag을 인터셉트해서 앨범 액티비티를 띄운후 onActivityResult를 통해 사진 데이터를 받아 처리

//변수들

    private ValueCallback<Uri> filePathCallbackNormal;

    private ValueCallback<Uri[]> filePathCallbackLollipop;

    private final static int FILECHOOSER_NORMAL_REQ_CODE = 1;

    private final static int FILECHOOSER_LOLLIPOP_REQ_CODE = 2;

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        WebView wv = (WebView) findViewById(R.id.webview);

        wv.setWebChromeClient(new WebChromeClient() {

//여기부터 중요

            // For Android < 3.0

            public void openFileChooser( ValueCallback<Uri> uploadMsg) {

                Log.d("MainActivity", "3.0 <");

                openFileChooser(uploadMsg, "");

            }

            // For Android 3.0+

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

                Log.d("MainActivity", "3.0+");

                filePathCallbackNormal = uploadMsg;

                Intent i = new Intent(Intent.ACTION_GET_CONTENT);

                i.addCategory(Intent.CATEGORY_OPENABLE);

                i.setType("image/*");

                startActivityForResult(Intent.createChooser(i, "File Chooser"), FILECHOOSER_NORMAL_REQ_CODE);

            }

            // For Android 4.1+

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

                Log.d("MainActivity", "4.1+");

                openFileChooser(uploadMsg, acceptType);

            }

            // For Android 5.0+

            public boolean onShowFileChooser(

                    WebView webView, ValueCallback<Uri[]> filePathCallback,

                    WebChromeClient.FileChooserParams fileChooserParams) {

                Log.d("MainActivity", "5.0+");

                if (filePathCallbackLollipop != null) {

                    filePathCallbackLollipop.onReceiveValue(null);

                    filePathCallbackLollipop = null;

                }

                filePathCallbackLollipop = filePathCallback;

                Intent i = new Intent(Intent.ACTION_GET_CONTENT);

                i.addCategory(Intent.CATEGORY_OPENABLE);

                i.setType("image/*");

                startActivityForResult(Intent.createChooser(i, "File Chooser"), FILECHOOSER_LOLLIPOP_REQ_CODE);

                return true;

            }

//여기까지

        });

        WebSettings set = wv.getSettings();

        set.setJavaScriptEnabled(true);

        wv.loadUrl("http://test.com/upload.php");

    }

//여기도 중요

    @Override

    protected void onActivityResult(int requestCode, int resultCode, Intent data) {

        if (requestCode == FILECHOOSER_NORMAL_REQ_CODE) {

            if (filePathCallbackNormal == null) return ;

            Uri result = (data == null || resultCode != RESULT_OK) ? null : data.getData();

            filePathCallbackNormal.onReceiveValue(result);

            filePathCallbackNormal = null;

        } else if (requestCode == FILECHOOSER_LOLLIPOP_REQ_CODE) {

            if (filePathCallbackLollipop == null) return ;

            filePathCallbackLollipop.onReceiveValue(WebChromeClient.FileChooserParams.parseResult(resultCode, data));

            filePathCallbackLollipop = null;

        }

    }