我一直在努力从WebView上传文件。我在谷歌上搜索并实施了所有建议的解决方案(例如这篇SO帖子)，但没有一个可行。
我有一个HTML页面与以下代码上传文件。
<form method="POST" enctype="multipart/form-data">
File to upload: <input type="file" name="uploadfile">
<input type="submit" value="Press to Upload..."> to upload the file!
</form>
它在桌面浏览器如Firefox和内置浏览器中运行良好 的模拟器/ AVD，即，当我点击“浏览…”按钮渲染 元素，浏览器打开一个对话框 框，在那里我可以选择一个文件上传。
然而，在android 3.0模拟器/ AVD中，当我点击“选择” 文件”，什么都没有发生，没有文件对话框被打开!
当前回答
我发现有必要在Android 4.1中定义公共void openFileChooser(ValueCallback<Uri> uploadMsg, String acceptType, String capture)。然后我采用了米歇尔·奥利弗的解决方案。
其他回答
蜂窝(API 11)到Android 11的工作方法
由swati vishnoi更新，这适用于派和以上
static WebView mWebView;
private ValueCallback<Uri> mUploadMessage;
public ValueCallback<Uri[]> uploadMessage;
public static final int REQUEST_SELECT_FILE = 100;
private final static int FILECHOOSER_RESULTCODE = 1;
修改onActivityResult ()
@Override
public void onActivityResult(int requestCode, int resultCode, Intent intent)
{
if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP)
{
if (requestCode == REQUEST_SELECT_FILE)
{
if (uploadMessage == null)
return;
uploadMessage.onReceiveValue(WebChromeClient.FileChooserParams.parseResult(resultCode, intent));
uploadMessage = null;
}
}
else if (requestCode == FILECHOOSER_RESULTCODE)
{
if (null == mUploadMessage)
return;
// Use MainActivity.RESULT_OK if you're implementing WebView inside Fragment
// Use RESULT_OK only if you're implementing WebView inside an Activity
Uri result = intent == null || resultCode != MainActivity.RESULT_OK ? null : intent.getData();
mUploadMessage.onReceiveValue(result);
mUploadMessage = null;
}
else
Toast.makeText(getActivity().getApplicationContext(), "Failed to Upload Image", Toast.LENGTH_LONG).show();
}
现在在onCreate()或onCreateView()中粘贴以下代码
WebSettings mWebSettings = mWebView.getSettings();
mWebSettings.setJavaScriptEnabled(true);
mWebSettings.setSupportZoom(false);
mWebSettings.setAllowFileAccess(true);
mWebSettings.setAllowContentAccess(true);
mWebView.setWebChromeClient(new WebChromeClient()
{
// For 3.0+ Devices (Start)
// onActivityResult attached before constructor
protected void openFileChooser(ValueCallback uploadMsg, String acceptType)
{
mUploadMessage = uploadMsg;
Intent i = new Intent(Intent.ACTION_GET_CONTENT);
i.addCategory(Intent.CATEGORY_OPENABLE);
i.setType("image/*");
startActivityForResult(Intent.createChooser(i, "File Browser"), FILECHOOSER_RESULTCODE);
}
// For Lollipop 5.0+ Devices
public boolean onShowFileChooser(WebView mWebView, ValueCallback<Uri[]> filePathCallback, WebChromeClient.FileChooserParams fileChooserParams)
{
if (uploadMessage != null) {
uploadMessage.onReceiveValue(null);
uploadMessage = null;
}
uploadMessage = filePathCallback;
Intent intent = fileChooserParams.createIntent();
try
{
startActivityForResult(intent, REQUEST_SELECT_FILE);
} catch (ActivityNotFoundException e)
{
uploadMessage = null;
Toast.makeText(getActivity().getApplicationContext(), "Cannot Open File Chooser", Toast.LENGTH_LONG).show();
return false;
}
return true;
}
//For Android 4.1 only
protected void openFileChooser(ValueCallback<Uri> uploadMsg, String acceptType, String capture)
{
mUploadMessage = uploadMsg;
Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
intent.addCategory(Intent.CATEGORY_OPENABLE);
intent.setType("image/*");
startActivityForResult(Intent.createChooser(intent, "File Browser"), FILECHOOSER_RESULTCODE);
}
protected void openFileChooser(ValueCallback<Uri> uploadMsg)
{
mUploadMessage = uploadMsg;
Intent i = new Intent(Intent.ACTION_GET_CONTENT);
i.addCategory(Intent.CATEGORY_OPENABLE);
i.setType("image/*");
startActivityForResult(Intent.createChooser(i, "File Chooser"), FILECHOOSER_RESULTCODE);
}
});
解决方案:https://github.com/delight-im/Android-AdvancedWebView
崩裂剂解决方案:
activity和fragment的区别只在onActivityResult中:
片段:
lateinit var webViewGlobal: AdvancedWebView private set
class WebViewFragment : Fragment(), AdvancedWebView.Listener {
private lateinit var binding: FragmentWebViewBinding
override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? {
binding = FragmentWebViewBinding.inflate(inflater)
webViewGlobal = binding.webWiew
return binding.root
}
}
活动:
class MainActivity : AppCompatActivity() {
override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
webViewGlobal.onActivityResult(requestCode, resultCode, data)
super.onActivityResult(requestCode, resultCode, data)
}
}
Android 11:
<application
...
android:requestLegacyExternalStorage="true"
...
/>
清单:
<uses-permission android:name="android.permission.CAMERA"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
我发现有必要在Android 4.1中定义公共void openFileChooser(ValueCallback<Uri> uploadMsg, String acceptType, String capture)。然后我采用了米歇尔·奥利弗的解决方案。
我花了将近一个月的时间研究这个问题。一切都失败了。在多个网站中看到的所有代码都不工作。但这里存在最好的解决方案
https://github.com/chiclaim/android-webview-upload-file
步骤
1)点击克隆或下载
2)在本地目录中获取zip fle
3)解压压缩文件
4)开放Android工作室
5)转到文件---->打开>导航到你解压内容的目录。
6)在webView中更改所需的web url。loadUrl(“您的url hre”);在MainActivity.java
7)适用于Android studio 3.4.2版本
你访问过这个链接吗? http://groups.google.com/group/android-developers/browse_thread/thread/dcaf8b2fdd8a90c4/62d5e2ffef31ebdb
http://moazzam-khan.com/blog/?tag=android-upload-file
http://evgenyg.wordpress.com/2010/05/01/uploading-files-multipart-post-apache/
通过javalib Apache Commons上传文件的简明示例
我想你会从中得到帮助的
