Android加载html实现文件上传功能

package com.daohee.lingangoa;

import android.annotation.TargetApi;
import android.app.Activity;
import android.content.ClipData;
import android.content.Intent;
import android.net.Uri;
import android.os.Build;
import android.os.Bundle;
import android.view.KeyEvent;
import android.webkit.ValueCallback;
import android.webkit.WebChromeClient;
import android.webkit.WebSettings;
import android.webkit.WebView;
import android.webkit.WebViewClient;

public class MainActivity extends Activity {

	private WebView webview;
	private ValueCallback mUploadMessage;
    private ValueCallback mUploadCallbackAboveL;
    private final static int FILECHOOSER_RESULTCODE = 1;

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		// 实例化WebView对象
		webview = new WebView(this);
		webview.setWebViewClient(new MyWebViewClinet());
		webview.setWebChromeClient(new MyChromeViewClient());
		//设置 缓存模式 
		webview.getSettings().setCacheMode(WebSettings.LOAD_DEFAULT);  
		// 开启 DOM storage API 功能 
		webview.getSettings().setDomStorageEnabled(true); 
		webview.setVerticalScrollBarEnabled(true);
        webview.setHorizontalScrollBarEnabled(true);
		WebSettings webSettings = webview.getSettings(); 
		webSettings.setJavaScriptEnabled(true);
		webSettings.setDomStorageEnabled(true);  //开启DOM  
		webSettings.setDefaultTextEncodingName("utf-8");//设置编码  
		// // web页面处理  
		webSettings.setAllowFileAccess(true);// 支持文件流  
		webSettings.setUseWideViewPort(true);// 调整到适合webview大小  
		webSettings.setLoadWithOverviewMode(true);//调整到适合webview大小  
		webSettings.setAppCacheEnabled(true);
		webSettings.setLoadWithOverviewMode(true); 
		webSettings.setNeedInitialFocus(false);
		webSettings.setSupportMultipleWindows(true);
		webSettings.setBuiltInZoomControls(true);
		webSettings.setJavaScriptCanOpenWindowsAutomatically(true);
		webSettings.setSupportZoom(true);
		//提高网页加载速度，暂时阻塞图片加载，然后网页加载好了，在进行加载图片  
//		webSettings.setBlockNetworkImage(true);  
		// 加载需要显示的网页
		webview.loadUrl("http://192.168.0.30:8080/jeesite");
		// 设置Web视图
		setContentView(webview);
	}

	@Override
	// 设置回退
	// 覆盖Activity类的onKeyDown(int keyCoder,KeyEvent event)方法
	public boolean onKeyDown(int keyCode, KeyEvent event) {
		if ((keyCode == KeyEvent.KEYCODE_BACK) && webview.canGoBack()) {
			webview.goBack(); // goBack()表示返回WebView的上一页面
			return true;
		}
		return false;
	}

	// Web视图
	private class MyWebViewClinet extends WebViewClient {
	        @Override
	        public boolean shouldOverrideUrlLoading(WebView view, String url) {
	            view.loadUrl(url);
	            return true;
	        }
	}
	 
	 class MyChromeViewClient extends WebChromeClient {
			 // For Android 3.0+
	         public void openFileChooser(ValueCallback uploadMsg) {
	             mUploadMessage = uploadMsg;
	             Intent i = new Intent(Intent.ACTION_GET_CONTENT);
	             i.addCategory(Intent.CATEGORY_OPENABLE);
	             i.setType("*/*");
	             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 uploadMsg, String acceptType, String capture){
	             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" ), MainActivity.FILECHOOSER_RESULTCODE );
	         }
	         // For Android 5.0+
	         public boolean onShowFileChooser (WebView webView, ValueCallback filePathCallback, WebChromeClient.FileChooserParams fileChooserParams) {
	             mUploadCallbackAboveL = filePathCallback;
	             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);
	             return true;
	         }

	    }
	 /**
	     *新打开的activity 关闭后 传输数据到此activity
	     */
	    @Override
	    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
	        super.onActivityResult(requestCode, resultCode, data);
	        if(requestCode==FILECHOOSER_RESULTCODE)
	        {
	            if (null == mUploadMessage && null == mUploadCallbackAboveL) return;
	            Uri result = data == null || resultCode != RESULT_OK ? null : data.getData();
	            if (mUploadCallbackAboveL != null) {
	                onActivityResultAboveL(requestCode, resultCode, data);
	            }
	            else  if (mUploadMessage != null) {
	                mUploadMessage.onReceiveValue(result);
	                mUploadMessage = null;
	            }
	        }
	    }

	    @TargetApi(Build.VERSION_CODES.LOLLIPOP)
	    private void onActivityResultAboveL(int requestCode, int resultCode, Intent data) {
	        if (requestCode != FILECHOOSER_RESULTCODE
	                || mUploadCallbackAboveL == null) {
	            return;
	        }

	        Uri[] results = null;
	        if (resultCode == Activity.RESULT_OK) {
	            if (data == null) {

	            } else {
	                String dataString = data.getDataString();
	                ClipData clipData = data.getClipData();

	                if (clipData != null) {
	                    results = new Uri[clipData.getItemCount()];
	                    for (int i = 0; i < clipData.getItemCount(); i++) {
	                        ClipData.Item item = clipData.getItemAt(i);
	                        results[i] = item.getUri();
	                    }
	                }

	                if (dataString != null)
	                    results = new Uri[]{Uri.parse(dataString)};
	            }
	        }
	        mUploadCallbackAboveL.onReceiveValue(results);
	        mUploadCallbackAboveL = null;
	        return;
	    }

}

activity_main.xml  内容

AndroidManifest.xml   内容