java Web视图文件选择器崩溃问题

Question

在onShowFileChooser中(WebView view, ValueCallback<Uri[]> filePath, WebChromeClient.FileChooserParams fileChooserParams)函数将filePath设为null

Device configuration:
Debug-infos:
Android version: 21
Device: samsung SM-N9005
OS Version: 3.4.0-6408191(N9005DXSGBQA1)
Device: hlte

在其他设备和api级别，它工作正常

webView.setWebChromeClient(new WebChromeClient() {

        // For Android 5.0
        public boolean onShowFileChooser(WebView view, ValueCallback<Uri[]> filePath, WebChromeClient.FileChooserParams fileChooserParams) {

            //qrCodeReaderView.stopCamera();
            mFilePathCallback = filePath;
            Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
            File photoFile = null;
            try {
                photoFile = createImageFile();
            } catch (IOException e) {
                e.printStackTrace();
            }

            mCapturedImageURI = Uri.fromFile(photoFile);
            if (photoFile != null) {
                takePictureIntent.putExtra(MediaStore.EXTRA_OUTPUT, mCapturedImageURI
                );
            } else {

            }
            startActivityForResult(takePictureIntent, INPUT_FILE_REQUEST_CODE);

            return true;

        }

    });

关于活动结果：

 @Override public void onActivityResult(int requestCode, int resultCode, Intent data) { 
     super.onActivityResult(requestCode, resultCode, data);       
     mFilePathCallback.onReceiveValue(new Uri[]{mCapturedImageURI});   
     mFilePathCallback = null;
   }

日志：

java.lang.RuntimeException: 
Unable to resume activity   
{com.gaintz/com.shashank.gaintz.WebViewActivity}:  
java.lang.RuntimeException: Failure delivering result ResultInfo{who=null, request=1, result=-1, data=null} to activity  {com.gaintz/com.shashank.gaintz.WebViewActivity}: 

java.lang.NullPointerException: Attempt to invoke interface method 'void 安卓.webkit.ValueCallback.onReceiveValue(java.lang.Object‌​)' on a null object reference at 安卓.app.ActivityThread.performResumeActivity(ActivityThr‌​ead.java:3390) at 

Answer 1

我知道现在给出答案已经太迟了，但我也有同样的问题，我解决了，所以给未来的读者留下了答案

我只在安卓棒棒糖上遇到过这个问题（三星galaxy s4，注3）

每当我拍照时，文件路径总是空的

通过多次测试，我意识到每次拍照时网络视图都会刷新

刷新的原因是“活动导向”

将此添加到Menifest中，以保持具有webview的活动的起源或定位状态

<activity 
 ...
 android:configChanges="orientation|screenSize">

你也可以参考Android - Preventing WebView reload on Rotate