安卓网络视图<输入类型= "file" >不起作用

Question

我在网站上保留了一个html文件。

https://pinapakait.com/cam/testcam.html

它具有以下简单的输入类型文件代码 输入类型="文件" 接受="图像/*;捕获=相机">

当通过网络浏览器在移动设备中打开时，它正在打开文件，相机选项。但现在在安卓的网页视图中打开。

非常感谢您的帮助。

授予以下权限

uses-permission android:name="android.permission.INTERNET" 
uses-permission android:name="android.permission.CAMERA" 
uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"
uses-feature android:name="android.hardware.camera" android:required="true"
uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"
uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"
uses-permission android:name="android.permission.WRITE_INTERNAL_STORAGE"
uses-permission android:name="android.permission.READ_INTERNAL_STORAGE" 

为 Web 视图设置以下设置。

setLoadsImagesAutomatically(true)
setJavaScriptEnabled(true)
setDomStorageEnabled(true)
setLoadWithOverviewMode(true)
setPluginState(WebSettings.PluginState.ON)
setMediaPlaybackRequiresUserGesture(false)
setPluginState(WebSettings.PluginState.ON)
setAppCacheEnabled(true)
setScrollBarStyle(View.SCROLLBARS_INSIDE_OVERLAY)
setAllowFileAccessFromFileURLs(true)
setAllowUniversalAccessFromFileURLs(true)
setJavaScriptCanOpenWindowsAutomatically(true)
setBuiltInZoomControls(true)
setPluginsEnabled(true)
setAllowFileAccess(true)
setAllowContentAccess(true)
setSupportZoom(true)

Answer 1

我在网络视图上遇到了同样的问题，在谷歌搜索它之后，我通过扩展 WebChromeClient 找到了这个解决方案。

public class MyWebChromeClient extends WebChromeClient {
DetailsFragmentWebView context;
public ValueCallback<Uri> mUploadMessage;
public ValueCallback<Uri[]> mUploadMessageAboveL;
public Uri mCapturedImageURI;
public MyWebChromeClient(DetailsFragmentWebView context){
this.context = context;
//this.mCapturedImageURI = mCapturedImageURI;
//this.mUploadMessage = mUploadMessage;
//this.mUploadMessageAboveL = mUploadMessageAboveL;
}
// openFileChooser for Android 3.0+
public void openFileChooser(ValueCallback<Uri> uploadMsg, ValueCallback<Uri[]> uploadMsgAboveL, String acceptType){
// Update message
mUploadMessage = uploadMsg;
mUploadMessageAboveL = uploadMsgAboveL;
try{
// Create AndroidExampleFolder at sdcard
File imageStorageDir = new File(
Environment.getExternalStoragePublicDirectory(
Environment.DIRECTORY_PICTURES)
, "AndroidExampleFolder");
if (!imageStorageDir.exists()) {
// Create AndroidExampleFolder at sdcard
imageStorageDir.mkdirs();
}
// Create camera captured image file path and name
File file = new File(
imageStorageDir + File.separator + "IMG_"
+ String.valueOf(System.currentTimeMillis())
+ ".jpg");
mCapturedImageURI = Uri.fromFile(file);
// Camera capture image intent
final Intent captureIntent = new Intent(
android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
captureIntent.putExtra(MediaStore.EXTRA_OUTPUT, mCapturedImageURI);
Intent i = new Intent(Intent.ACTION_GET_CONTENT);
i.addCategory(Intent.CATEGORY_OPENABLE);
i.setType("image/*");
// Create file chooser intent
Intent chooserIntent = Intent.createChooser(i, "Image Chooser");
// Set camera intent to file chooser
chooserIntent.putExtra(Intent.EXTRA_INITIAL_INTENTS
, new Parcelable[] { captureIntent });
// On select image call onActivityResult method of activity
context.startActivityForResult(chooserIntent, FILECHOOSER_RESULTCODE);
}
catch(Exception e){
Toast.makeText(context.getActivity(), "Chrome Exception:"+e,
Toast.LENGTH_LONG).show();
}
}

//openFileChooser for other Android versions
public void openFileChooser(ValueCallback<Uri> uploadMsg,
String acceptType,
String capture) {
openFileChooser(uploadMsg , mUploadMessageAboveL, acceptType);
}
@Override
public boolean onShowFileChooser(WebView webView, ValueCallback<Uri[]> filePathCallback, FileChooserParams fileChooserParams) {
openFileChooser(null ,filePathCallback , "");
return true;
}
}

并将您的 Web 视图设置为使用此类：

MyWebChromeClient  myChromeClient = new myChromeClient(this);
webView.webChromeClient = myChromeClient;

您还需要将此代码添加到您的活动中：

override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
//super.onActivityResult(requestCode, resultCode, data)
if (requestCode == FILECHOOSER_RESULTCODE) {
if (null == myChromeClient.mUploadMessage && null == myChromeClient.mUploadMessageAboveL) return
val result = if (resultCode != RESULT_OK) null
else if (data!=null) data.data
else myChromeClient.mCapturedImageURI
if (myChromeClient.mUploadMessageAboveL != null) {
onActivityResultAboveL(requestCode, resultCode, data)
} else if (myChromeClient.mUploadMessage != null) {
myChromeClient.mUploadMessage?.onReceiveValue(result)
myChromeClient.mUploadMessage = null
}
}
}
@TargetApi(Build.VERSION_CODES.LOLLIPOP)
private fun onActivityResultAboveL(requestCode: Int, resultCode: Int, intent: Intent?) {
if (requestCode != FILECHOOSER_RESULTCODE || myChromeClient.mUploadMessageAboveL == null)
return
var results: Array<Uri>? = null
if (resultCode == Activity.RESULT_OK) {
if (intent != null) {
val dataString = intent.dataString
val clipData = intent.clipData
if (clipData != null) {
results = Array<Uri>(clipData.itemCount) { _->return Unit}
for (i in 0 until clipData.itemCount) {
val item = clipData.getItemAt(i)
results[i] = item.uri
}
}
if (dataString != null)
results = arrayOf(Uri.parse(dataString))
}else if (myChromeClient.mCapturedImageURI!=null)
results = arrayOf(myChromeClient.mCapturedImageURI)
}
myChromeClient.mUploadMessageAboveL?.onReceiveValue(results)
myChromeClient.mUploadMessageAboveL = null
}