我有一个带有WebView的应用程序,显示一个HTML文件.在HTML文件中,有一个按钮,用于请求用户录制视频,或从文档文件夹中选择视频.

在选择(或录制)视频时,它会将带有链接(由Uri编码)的javascript函数调用到视频文件,然后将其设置为元素,方法是将其设置为源：

function showPreview(previewFile){
    console.log(previewFile);
    document.getElementById('previewVideo').src = previewFile;
}

我遇到了这个错误,我一直在寻找,但似乎无法找到解决方案：

I/chromium﹕ [INFO:CONSOLE(94)] "content://com.android.providers.media.documents/document/video%3A19961",source: file:///android_asset/index.html (94)
W/MediaResourceGetter﹕ permission denied to access network state
W/MediaResourceGetter﹕ non-file URI can't be read due to unsuitable network conditions
E/MediaResourceGetter﹕ Unable to configure Metadata extractor

如您所见,我正在我的javascript函数中记录视频文件的链接,您可以告诉内容链接：//com.android.providers.media.documents/document/video：19961.

这就是我在我的代码中加载WebView的方式(当然在XML中有相应的WebView)：

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    webView = (WebView) this.findViewById(R.id.webView);
    webView.getSettings().setAllowFileAccess(true);
    webView.getSettings().setAllowFileAccessFromFileURLs(true);
    webView.getSettings().setJavaScriptEnabled(true);
    webView.setWebChromeClient(new WebChromeClient());
    webView.addJavascriptInterface(new CSJSInterface(getApplicationContext()),"jsInterface");
    webView.loadUrl("file:///android_asset/index.html");
}

Javascript接口功能&打回来

 @JavascriptInterface
 public void showCapture() {
     File imageStorageDir = new File(
             Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES),CS_MOVIE_DIRECTORY);

     // Create the directory if needed:
     if (!imageStorageDir.exists()) {
         imageStorageDir.mkdirs();
     }

     // Create camera captured image file path and name
     File file = new File(
             imageStorageDir + File.separator + "MOV_"
                     + String.valueOf(System.currentTimeMillis())
                     + ".mp4");
     mCapturedImageURI = Uri.fromFile(file);
     // Camera capture image intent
     final Intent captureIntent = new Intent(MediaStore.ACTION_VIDEO_CAPTURE);
     captureIntent.putExtra(MediaStore.EXTRA_OUTPUT,mCapturedImageURI);
     Intent i = new Intent(Intent.ACTION_GET_CONTENT);
     i.addCategory(Intent.CATEGORY_OPENABLE);
     i.setType("video/*");

     // Create file chooser intent
     Intent chooserIntent = Intent.createChooser(i,"Video Chooser");

     // Set camera intent to file chooser
     chooserIntent.putExtra(Intent.EXTRA_INITIAL_INTENTS,new Parcelable[]{captureIntent});

     // On select image call onActivityResult method of activity
     startActivityForResult(chooserIntent,CAMERA_CAPTURE_RESULT);
 }

调用javascript链接已选择/录制的视频文件：

@Override
protected void onActivityResult(int requestCode,int resultCode,Intent data) {
    LogUtils.log(LogUtils.DEBUG,"onActivityResult called: " + requestCode + "," + resultCode);

    if (requestCode == CAMERA_CAPTURE_RESULT) {
        // Test if the WebView is loaded:
        if (webView != null) {
            LogUtils.log(LogUtils.DEBUG,"Calling javascript to set preview video.");
            webView.loadUrl("javascript: showPreview('" + Uri.encode(data.getData().toString()) + "');");
        }
    }
}

AndroidManifest.xml中

这是我的清单,因为我假设权限可能正在发挥作用