android webview type=file文件上传，安卓端代码

http://stackoverflow.com/questions/5907369/file-upload-in-webview

http://blog.csdn.net/longlingli/article/details/16946047

注意：不能再onResume中写加载webview的语句，因为当切换到图像库找照片的时候 自身的activity 被pause了，选好图片切回来的时候再次调用onresume了，webview又重新加载所以图片可能无法显示了

package com.example.cairh_sjkh_it;


import android.app.Activity;
import android.app.AlertDialog;
import android.app.AlertDialog.Builder;
import android.app.Notification.Action;
import android.content.Intent;
import android.content.res.Configuration;
import android.graphics.Bitmap;
import android.net.Uri;
import android.os.Build;
import android.os.Bundle;
import android.webkit.JsResult;
import android.webkit.ValueCallback;
import android.webkit.WebChromeClient;
import android.webkit.WebView;
import android.webkit.WebViewClient;

public class MainActivity extends Activity {
    public ValueCallback<Uri> mUploadMessage;
    public final static int FILECHOOSER_RESULTCODE = 1;
     WebView webView;
        @Override
        protected void onCreate(Bundle savedInstanceState)  {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.res);
            webView=(WebView)findViewById(R.id.webview);
            //js调试调试功能支持4.4版本以上的
           if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
                WebView.setWebContentsDebuggingEnabled(true);
           }
           //js生效
           webView.getSettings().setJavaScriptEnabled(true);
           //让 h5页面中的 alert生效
           webView.setWebChromeClient(new WebChromeClient(){
               //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/*");    
                MainActivity.this.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("*/*");  
               MainActivity.this.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/*");    
                   MainActivity.this.startActivityForResult( Intent.createChooser( i, "File Chooser" ), MainActivity.FILECHOOSER_RESULTCODE );  
      
               }  
               @Override 
               public boolean onJsAlert(WebView view,String url,String message,JsResult result)
               {
                   return super.onJsAlert(view,url,message,result);
               } });   
           webView.setWebViewClient(new WebViewClient(){
               @Override
               public boolean shouldOverrideUrlLoading(WebView view,String url){
                   // TODO Auto-generated method stub
                   // 使用自己的WebView组件来响应Url加载事件，而不是使用默认浏览器器加载页面
                   view.loadUrl(url);
                   return super.shouldOverrideUrlLoading(view, url);
               }
           });
           webView.getSettings().setDomStorageEnabled(true);
           webView.getSettings().setDatabaseEnabled(true);
                   
           webView.loadUrl("http://192.168.226.153:8080/mobile/index.htm");
               
        }
        @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;    
         }  
       }  
        
        public class myWebClient extends WebViewClient  
        {  
            @Override  
            public void onPageStarted(WebView view, String url, Bitmap favicon) {  
                // TODO Auto-generated method stub  
                super.onPageStarted(view, url, favicon);  
            }  
          
            @Override  
            public boolean shouldOverrideUrlLoading(WebView view, String url) {  
                // TODO Auto-generated method stub  
          
                view.loadUrl(url);  
                return true;  
          
            }  
          
            @Override  
            public void onPageFinished(WebView view, String url) {  
                // TODO Auto-generated method stub  
                super.onPageFinished(view, url);  
          
            }  
        }  
          
        //flipscreen not loading again  
        @Override  
        public void onConfigurationChanged(Configuration newConfig){          
            super.onConfigurationChanged(newConfig);  
        }  
          
        // To handle "Back" key press event for WebView to go back to previous screen.  
        /*@Override  
        public boolean onKeyDown(int keyCode, KeyEvent event)   
        {  
            if ((keyCode == KeyEvent.KEYCODE_BACK) && web.canGoBack()) {  
                web.goBack();  
                return true;  
            }  
            return super.onKeyDown(keyCode, event);  
        }*/  
}