android WebView的网页上传文件

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 。
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;            }        }    }

在WebView设置好 setWebChromeClient(wvcc);

在具体项目中已使用。

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