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