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package com.lan.www;

import java.io.File;

import android.app.Activity;

import android.app.DownloadManager;

import android.content.BroadcastReceiver;

import android.content.Context;

import android.content.Intent;

import android.content.IntentFilter;

import android.net.Uri;

import android.os.Bundle;

import android.os.Environment;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.Button;

import android.widget.TextView;

public class DowloadManagerActivity extends Activity {

    /** Called when the activity is first created. */

    TextView tv;

    Button btDel;

    DownloadManager dm;

    long downloadId;

    @Override

    public void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.main);

        tv = (TextView) findViewById(R.id.tv);

        btDel = (Button) findViewById(R.id.button2);

        btDel.setOnClickListener(new OnClickListener() {

           

            public void onClick(View v) {

                // TODO Auto-generated method stub

                //这个方法是变参，可以有多个参数

                dm.remove(downloadId);//删除

            }

        });

        //得到系统的DownloadManager

        dm = (DownloadManager) getSystemService(DOWNLOAD_SERVICE);

       

    public void doClick(View v)

    {

        DownloadManager.Request dmReq =

                    //转化成Uri的格式

                new DownloadManager.Request(Uri.parse("http://127.0.0.1:8080/tomServer/file/db.zip"));

        dmReq.setTitle("db.zip");//设置标题

        dmReq.setDescription(" downloading!");//设置工作状态

      

//禁止发出通知，既后台下载  down.setShowRunningNotification(false);

//不显示下载界面  down.setVisibleInDownloadsUi(false);

       //设置下载方式，(这里设置的是3G和WIFI)

dmReq.setAllowedNetworkTypes(DownloadManager.Request.NETWORK_MOBILE|DownloadManager.Request.NETWORK_WIFI);

       //dmReqi.setDestinationUri整合了下面两种方法

      //dmReq.setDestinationInExternalFilesDir(context, dirType, subPath);//设置下载后文件存放的位置

       // dmReq.setDestinationInExternalPublicDir(dirType, subPath); //公共路径

        dmReqi.setDestinationUri(

                Uri.fromFile(new File(

                        //设置公共路径

                        Environment.getExternalStoragePublicDirectory(

                                //设置文件

                                Environment.DIRECTORY_DOWNLOADS

                                ).getAbsoluteFile()

                        +".zip")

                ));

        //放到一个队列里，队列里系统里会给一个Id;

        downloadId = dm.enqueue(dmReq);

        //设置过虑器，用系统给的就可以，可以添加多外过虑器，添加多个用add

        IntentFilter filter = new IntentFilter(DownloadManager.ACTION_DOWNLOAD_COMPLETE);

        //注册广播

        registerReceiver(thereReceiver, filter);

       

        tv.setText(tv.getText().toString()+" download started : id = "+downloadId);

    }

   

    @Override

    protected void onPause() {

        // TODO Auto-generated method stub

        super.onPause();

        //解除注册广播

        unregisterReceiver(thereReceiver);

    }

   

    public BroadcastReceiver thereReceiver = new BroadcastReceiver() {

       

        @Override

        public void onReceive(Context context, Intent intent) {

            // TODO Auto-generated method stub

            Bundle extras = intent.getExtras();

            long doneId = extras.getLong(DownloadManager.EXTRA_DOWNLOAD_ID);

            tv.setText(tv.getText().toString()+" \nfinish "+doneId);

        }

    };

}

android设置配置文件

添加下面两条权限

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

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

2.2以前版本的可能还要添加DownloadManager的使用权限，

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