如何使上传按钮在android应用程序中工作? [英] How to make upload button work in android app?

问题描述

这个问题被多次遇到，但似乎没有任何解释有效.(或者也许我在这个叫做互联网的混乱中没有找到它)......

This question is encountered several times, though there doesn't seem to be no explanation that works. (or maybe I didn't find it in this chaos called internet)...

我正在开发一个 android 应用程序，它会打开一个包含上传按钮的 HTML 页面.它在 WebView 中不起作用.

I am developing an android app that opens a HTML page that contains an upload button. It doesn't work in WebView.

我试过了:http://m0s-programming.blogspot.in/2011/02/file-upload-in-through-webview-on.html

但是 eclipse 给出警告 openFileChooser(ValueCallback uploadMsg) 永远不会在本地使用".该应用应适用于 Android 2.2 (API 8) 及更高版本.

but eclipse gives warning that "openFileChooser(ValueCallback uploadMsg) is never used locally". The app should work with Android 2.2 (API 8) and above.

它给出了一些错误，我猜是由于 WebView.setWebChromeClient(new CustomWebChromeClient()

It give some errors, I guess due to wrong placement of WebView.setWebChromeClient(new CustomWebChromeClient()

有人可以帮我解决这个问题吗?

Can someone help me on this?

推荐答案

这里回答了关于文件上传的类似问题:在WebView中上传文件.

A similar question about file upload was answered here: File Upload in WebView.

另外，不同版本的 Android 需要不同的方法:https://stackoverflow.com/posts/12746435/edit

Also different versions of Android require different methods: https://stackoverflow.com/posts/12746435/edit

这是活动的完整且自给自足的代码:

Here is full and self-sufficient code of the activity:

public class FileAttachmentActivity extends Activity {

    private ValueCallback<Uri> mUploadMessage;
    private final static int FILECHOOSER_RESULTCODE = 1;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        WebView wv = new WebView(this);
        wv.setWebViewClient(new WebViewClient());
        wv.setWebChromeClient(new WebChromeClient() {
            //The undocumented magic method override  
            //Eclipse will swear at you if you try to put @Override here  
            public void openFileChooser(ValueCallback<Uri> uploadMsg) {
                FileAttachmentActivity.this.showAttachmentDialog(uploadMsg);
            }

            // For Android > 3.x
            public void openFileChooser(ValueCallback<Uri> uploadMsg, String acceptType) {
                FileAttachmentActivity.this.showAttachmentDialog(uploadMsg);
            }

            // For Android > 4.1
            public void openFileChooser(ValueCallback<Uri> uploadMsg, String acceptType, String capture) {
                FileAttachmentActivity.this.showAttachmentDialog(uploadMsg);
            }
        });

        this.setContentView(wv);

        wv.loadUrl("https://dl.dropbox.com/u/8047386/posttest.htm");

    }

    private void showAttachmentDialog(ValueCallback<Uri> uploadMsg) {
        this.mUploadMessage = uploadMsg;

        Intent i = new Intent(Intent.ACTION_GET_CONTENT);
        i.addCategory(Intent.CATEGORY_OPENABLE);
        i.setType("*/*");

        this.startActivityForResult(Intent.createChooser(i, "Choose type of attachment"), FILECHOOSER_RESULTCODE);
    }

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

这篇关于如何使上传按钮在android应用程序中工作?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！