CustomWebChromeClient.java

//imports
//webchromeclient for input type=file with file selector
public class CustomWebChromeClient extends WebChromeClient {
    @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/*");
        startActivityForResult(Intent.createChooser(i, "Choose image"), 1);
    }
    @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"), 1);
    }
    // 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/*");
        startActivityForResult(Intent.createChooser(i, "File Chooser"), 1);
    }