android WebView的网页上传文件

1. android WebView 网页上传文件（图片资源等）
   网页访问本地资源有两种方法：1可以通过js互调，原生代码提供对应的方法；2网页中标签，访问本地资源。

   本文主要讲的就是2 。

2. 具体代码（以Webview在Activity中为列）

 ValueCallback mUploadMessages;
 ValueCallback mUploadMessage;
   int  FILECHOOSER_RESULTCODE = 100;
    WebChromeClient wvcc = new WebChromeClient() {
        // For Android 3.0-
        public void openFileChooser(ValueCallback uploadMsg) {
            Log.d(TAG, "openFileChoose(ValueCallback uploadMsg)");
            mUploadMessage = uploadMsg;
            Intent i = new Intent(Intent.ACTION_GET_CONTENT);
            i.addCategory(Intent.CATEGORY_OPENABLE);
            i.setType("*/*");
            startActivityForResult(Intent.createChooser(i, "File Chooser"), FILECHOOSER_RESULTCODE);        }
        // For Android 3.0+
        public void openFileChooser( ValueCallback uploadMsg, String acceptType ) {
            Log.d(TAG, "openFileChoose( ValueCallback 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
        public void openFileChooser(ValueCallback uploadMsg, String acceptType, String capture){
            Log.d(TAG, "openFileChoose(ValueCallback uploadMsg, String acceptType, String capture)");
            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 5.0+
        public boolean onShowFileChooser (WebView webView, ValueCallback filePathCallback, WebChromeClient.FileChooserParams fileChooserParams) {
            Log.d(TAG, "onShowFileChooser(ValueCallback uploadMsg, String acceptType, String capture)");
            mUploadMessages = filePathCallback;
            Intent i = new Intent(Intent.ACTION_GET_CONTENT);
            i.addCategory(Intent.CATEGORY_OPENABLE);
            i.setType("*/*");
            startActivityForResult(Intent.createChooser(i, "File Browser"),
                    FILECHOOSER_RESULTCODE);
            return true;
        }
    };


 @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);


        if (requestCode == FILECHOOSER_RESULTCODE ) {
            if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP){
                   if (null == mUploadMessages )
                    return;
                       mUploadMessages.onReceiveValue(WebChromeClient.FileChooserParams.parseResult(resultCode, data));
                mUploadMessages = null;
            }else {
                if (null == mUploadMessage)
                    return;
                Uri result = data == null || resultCode != RESULT_OK ? null
                        : data.getData();
                mUploadMessage.onReceiveValue(result);
                mUploadMessage = null;
            }



        }

    }

1. 在WebView设置好 setWebChromeClient(wvcc);

在具体项目中已使用。