WebView를 이용한 파일 첨부 하기

웹뷰에선 버전별로 파일 첨부 코드를 생성해 줘야 한다.

*다른 버전은 문제 없는거 같은데 4.2.2 버전에서는 안된다.(이유는 모르겠다.)

permission 추가

<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />

변수 선언

private static final int FILECHOOSER_RESULTCODE   = 1;
private final static int FILECHOOSER_LOLLIPOP_REQ_CODE = 2;
private ValueCallback<Uri> mUploadMessage = null;
private ValueCallback<Uri[]> filePathCallbackLollipop;

WebView setWebChromeClient 부분

// For Android 3.0-
@SuppressWarnings("unused")
public void openFileChooser(ValueCallback<Uri> uploadMsg) {
    mUploadMessage = uploadMsg;
    Intent i = new Intent(Intent.ACTION_GET_CONTENT);
    i.addCategory(Intent.CATEGORY_OPENABLE);
    //i.setType("image/*");
    i.setType("*/*");
    startActivityForResult(Intent.createChooser(i, "File Chooser"), FILECHOOSER_RESULTCODE);
}

// For Android 3.0+
@SuppressWarnings("unused")
public void openFileChooser(ValueCallback<Uri> uploadMsg, String acceptType) {
    mUploadMessage = uploadMsg;
    Intent i = new Intent(Intent.ACTION_GET_CONTENT);
    i.addCategory(Intent.CATEGORY_OPENABLE);
    i.setType("*/*");
    startActivityForResult(Intent.createChooser(i, "File Browser"), FILECHOOSER_RESULTCODE);
}

// For Android 4.1+
@SuppressWarnings("unused")
public void openFileChooser(ValueCallback<Uri> uploadMsg, String acceptType, String capture) {
    mUploadMessage = uploadMsg;
    Intent i = new Intent(Intent.ACTION_GET_CONTENT);
    i.addCategory(Intent.CATEGORY_OPENABLE);
    //i.setType("image/*");
    i.setType("*/*");
    startActivityForResult(Intent.createChooser(i, "File Chooser"), FILECHOOSER_RESULTCODE);
}

// 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;
}

결과값 처리

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent intent) {
    if (requestCode == FILECHOOSER_RESULTCODE) {
        if (null == mUploadMessage)
            return;
        Uri result = intent == null || resultCode != RESULT_OK ? null : intent.getData();
        mUploadMessage.onReceiveValue(result);
        mUploadMessage = null;
    } else if (requestCode == FILECHOOSER_LOLLIPOP_REQ_CODE) {
        if (filePathCallbackLollipop == null) return ;
        filePathCallbackLollipop.onReceiveValue(WebChromeClient.FileChooserParams.parseResult(resultCode, intent));
        filePathCallbackLollipop = null;
    }
}