选择文件不使用webview的手机上工作

当我遇到类似的问题时，我使用了this souce中的setWebChromeClient()方法。

import android.app.AlertDialog; 
import android.content.Context; 
import android.content.Intent; 
import android.net.Uri; 
import android.os.Bundle; 
import android.view.View; 
import android.webkit.JavascriptInterface; 
import android.webkit.ValueCallback; 
import android.webkit.WebChromeClient; 
import android.webkit.WebView; 
import android.webkit.WebViewClient; 
import android.widget.ProgressBar; 
import android.widget.Toast; 
import org.apache.http.util.EncodingUtils; 
public class BrowserScreen extends Activity { 
    private WebView webView; 
    private String url = "url"; 
    private ValueCallback<Uri> mUploadMessage; 
    private final static int FILECHOOSER_RESULTCODE = 1; 
    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     // TODO Auto-generated method stub 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.browser_activity); 
     initFields(); 
     setListeners(); 
    } 
    public void initFields() { 
     // TODO Auto-generated method stub 
     webView = (WebView) findViewById(R.id.webView1); 
     webView.getSettings().setJavaScriptEnabled(true); 
     webView.getSettings().setBuiltInZoomControls(true); 
     webView.getSettings().setAllowFileAccess(true); 
    } 
    public void setListeners() { 
     // TODO Auto-generated method stub 
     webView.setWebViewClient(new WebViewClient() { 
      public void onReceivedError(WebView view, int errorCode, String description, String failingUrl) { 
       webView.loadUrl("about:blank"); 
       view.clearHistory(); 
      } 
     }); 
     webView.setWebChromeClient(new WebChromeClient() { 
      public void onProgressChanged(WebView view, int progress) { 
      } 
      //The undocumented magic method override 
      //Eclipse will swear at you if you try to put @Override here 
      // For Android 3.0+ 
      public 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); 
      } 
      // For Android 3.0+ 
      public void openFileChooser(ValueCallback uploadMsg, String acceptType) { 
       mUploadMessage = uploadMsg; 
       Intent i = new Intent(Intent.ACTION_GET_CONTENT); 
       i.addCategory(Intent.CATEGORY_OPENABLE); 
       i.setType("*/*"); 
       startActivityForResult(
         Intent.createChooser(i, "File Browser"), 
         FILECHOOSER_RESULTCODE); 
      } 
      //For Android 4.1 
      public void openFileChooser(ValueCallback<Uri> uploadMsg, String acceptType, String capture) { 
       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); 
      } 
     }); 
      webView.loadUrl(url); 
     final MyJavaScriptInterface myJavaScriptInterface 
       = new MyJavaScriptInterface(this); 
     webView.addJavascriptInterface(myJavaScriptInterface, "AndroidFunction"); 
    } 
    @Override 
    public void onBackPressed() { 
     // TODO Auto-generated method stub 
     if (webView.canGoBack() == true) { 
      webView.goBack(); 
     } else { 
      super.onBackPressed(); 
     } 
    } 
    public class MyJavaScriptInterface { 
     Context mContext; 
     MyJavaScriptInterface(Context c) { 
      mContext = c; 
     } 
     @JavascriptInterface 
     public void showToast(String toast) { 
      Toast.makeText(mContext, toast, Toast.LENGTH_SHORT).show(); 
      // webView.loadUrl("javascript:document.getElementById(\"Button3\").innerHTML = \"bye\";"); 
     } 
     @JavascriptInterface 
     public void openAndroidDialog() { 
      AlertDialog.Builder myDialog 
        = new AlertDialog.Builder(BrowserScreen.this); 
      myDialog.setTitle("DANGER!"); 
      myDialog.setMessage("You can do what you want!"); 
      myDialog.setPositiveButton("ON", null); 
      myDialog.show(); 
     } 
    } 
    @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); 
      mUploadMessage = null; 
     } 
    } 
}