Android - 利用DownloadManager下載檔案

在Android2.3中，官網已經提供透過http下載檔案的API，請看官網說明。
這裡直接使用範例

package com.test.testdownload;

import android.app.Activity;
import android.app.DownloadManager;
import android.app.DownloadManager.Request;
import android.net.Uri;
import android.os.Bundle;

public class Main extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
       
        DownloadManager dm = (DownloadManager) getSystemService(DOWNLOAD_SERVICE);
       
        //指定檔案來源，必需是http，hppts會有錯誤
        Request request = new Request(
        Uri.parse("http://www.ballpure.com/uploads4/userup/1107/25003614Z55.jpg"));
       
        //存檔路徑及檔名
        Uri uri = Uri.parse("file:///mnt/sdcard/download_name.jpg");
        request.setDestinationUri(uri);
       
        //開始下載
        dm.enqueue(request);
    }
}

AndroidManifest.xml 如下:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
      package="com.test.testdownload"
      android:versionCode="1"
      android:versionName="1.0">
    <uses-sdk android:minSdkVersion="9" />

    <application android:icon="@drawable/icon" android:label="@string/app_name">
        <activity android:name=".Main"
                  android:label="@string/app_name">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>

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