WebView中响应网页的“上传文件”需求

最新推荐文章于 2025-05-24 14:35:04 发布

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博客介绍了与Web端文件类型相关的操作步骤，包括提及web端要求的文件类型，如图片（image/*、image/jpeg等）、视频（video/*），还说明了设置类型以及反馈给web的步骤。

第一步：

webView.getSettings().setJavaScriptEnabled(true);

第二步：

webView.setWebChromeClient(new WebChromeClient() {
//扩展浏览器上传文件
//3.0++版本
public void openFileChooser(ValueCallback<Uri> uploadMsg, String acceptType) {
   openFileChooserImpl(uploadMsg, acceptType);
}

//3.0--版本
public void openFileChooser(ValueCallback<Uri> uploadMsg) {
   openFileChooserImpl(uploadMsg, null);
}

public void openFileChooser(ValueCallback<Uri> uploadMsg, String acceptType, String capture) {
   openFileChooserImpl(uploadMsg, acceptType);
}

// For Android > 5.0
@RequiresApi(api = Build.VERSION_CODES.LOLLIPOP)
public boolean onShowFileChooser(WebView webView, ValueCallback<Uri[]> uploadMsg, FileChooserParams fileChooserParams) {
   String[] acceptTypes = fileChooserParams.getAcceptTypes();
   openFileChooserImplForAndroid5(uploadMsg, acceptTypes);
   return true;
}});

//acceptType即是web端要求的文件类型，一般有

图片：image/*
视频：video/*

图片：image/jpeg,image/gif,image/png

第三步：设置类型

private void openFileChooserImpl(ValueCallback<Uri> uploadMsg, String acceptType) {
   mUploadMessage = uploadMsg;
   Intent i = new Intent(Intent.ACTION_GET_CONTENT);
   i.addCategory(Intent.CATEGORY_OPENABLE);
   i.setType("*/*");
   if (acceptType != null) {
      i.putExtra(Intent.EXTRA_MIME_TYPES, new String[]{acceptType});
   }
   startActivityForResult(Intent.createChooser(i, "文件选择"), FILECHOOSER_RESULTCODE);
}

private void openFileChooserImplForAndroid5(ValueCallback<Uri[]> uploadMsg, String[] acceptTypes) {
   mUploadMessageForAndroid5 = uploadMsg;
   Intent contentSelectionIntent = new Intent(Intent.ACTION_GET_CONTENT);
   contentSelectionIntent.addCategory(Intent.CATEGORY_OPENABLE);
   contentSelectionIntent.setType("*/*");
   if (acceptTypes != null) {
      contentSelectionIntent.putExtra(Intent.EXTRA_MIME_TYPES, acceptTypes);//支持多类型
   }
   Intent chooserIntent = new Intent(Intent.ACTION_CHOOSER);
   chooserIntent.putExtra(Intent.EXTRA_INTENT, contentSelectionIntent);
   chooserIntent.putExtra(Intent.EXTRA_TITLE, "文件选择");

   startActivityForResult(chooserIntent, FILECHOOSER_RESULTCODE_FOR_ANDROID_5);
}

第四步：反馈给web

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent intent) {
   if (requestCode == FILECHOOSER_RESULTCODE) {
      if (null == mUploadMessage)
         return;
      Uri result = intent == null || resultCode != RESULT_OK ? null : intent.getData();
      mUploadMessage.onReceiveValue(result);
      Logger.d("result:" + result);
      mUploadMessage = null;

   } else if (requestCode == FILECHOOSER_RESULTCODE_FOR_ANDROID_5) {
      if (null == mUploadMessageForAndroid5)
         return;
      Uri result = (intent == null || resultCode != RESULT_OK) ? null : intent.getData();
      if (result != null) {
         mUploadMessageForAndroid5.onReceiveValue(new Uri[]{result});
         Logger.d("result5:" + result);
      } else {
         mUploadMessageForAndroid5.onReceiveValue(new Uri[]{});
      }
      mUploadMessageForAndroid5 = null;
   }
}