Android WebView 不支持 H5 input type="file" 解决方法

最近因为赶项目进度，因此将本来要用原生控件实现的界面，自己做了H5并嵌入webview中。发现点击H5中 input type="file" 标签 不能打开android资源管理器。

通过网络搜索发现是因为 android webview 由于考虑安全原因屏蔽了 input type="file" 这个功能 。

经过不懈的努力，以及google 翻译的帮助 在 stackoverflow 中找到了解决的方法。

具体可以理解为 重写webview 的WebChromeClient ，废话不多说直接贴代码:

private ValueCallback<Uri> mUploadMessage;
public ValueCallback<Uri[]> uploadMessage;
public static final int REQUEST_SELECT_FILE = 100;
private final static int FILECHOOSER_RESULTCODE = 2;
webview.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
   @TargetApi(Build.VERSION_CODES.LOLLIPOP)
   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(getBaseContext(), "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);
   }
 });
}
@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(getBaseContext(), "Failed to Upload Image", Toast.LENGTH_LONG).show();
}

以上所述是小编给大家介绍的Android WebView 不支持 H5 input type="file" 解决方法网站的支持！

来源：http://www.cnblogs.com/hvkcode/p/6945043.html