android学习笔记之WebView浏览器下载文件

java代码：

package com.zwebxiazai;

import android.app.Activity;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.webkit.DownloadListener;
import android.webkit.WebView;
import android.webkit.WebViewClient;

public class zwebxiazai extends Activity {
   
 WebView webView;
   
   @Override
    public voidonCreate(Bundle savedInstanceState) {
       super.onCreate(savedInstanceState);
       setContentView(R.layout.main);
       this.webView=(WebView) this.findViewById(R.id.webview);
       this.webView.getSettings().setSupportZoom(false);
       this.webView.getSettings().setJavaScriptCanOpenWindowsAutomatically(true);
       this.webView.loadUrl("http://a.zntx.cc/");
       this.webView.setWebViewClient(new WebViewClientDemo());
       webView.setDownloadListener(new DownloadListener() {
           public void onDownloadStart(String url, String userAgent,
                           String contentDisposition, String mimetype,
                           long contentLength) {
                   //实现下载的代码
                                         Uri uri = Uri.parse(url);
          Intent intent = new Intent(Intent.ACTION_VIEW,uri);
                   startActivity(intent);
           }
    });

    }
  private class WebViewClientDemo extendsWebViewClient {
   @Override
    //在WebView中而不是默认浏览器中显示页面
    publicboolean shouldOverrideUrlLoading(WebView view, String url) {
    view.loadUrl(url);
     return true;
    }

     

    }
  }

 

main.xml代码：

<?xml version="1.0"encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
   android:orientation="vertical"
   android:layout_width="fill_parent"
   android:layout_height="fill_parent"
   >
<TextView
   android:layout_width="fill_parent"
   android:layout_height="wrap_content"
   android:text="@string/hello"
   />
<WebView android:id="@+id/webview"android:layout_width="fill_parent"
   android:layout_height="0dip" android:layout_weight="1"/>

</LinearLayout>

在AndroidManifest.xml中加入访问internet的权限：

<uses-permissionandroid:name="android.permission.INTERNET"></uses-permission>