Android开发之文件下载，状态时显示下载进度，点击自动安装

		

	 

	在进行软件升级时，需要进行文件下载，在这里实现自定义的文件下载，并在状态栏显示下载进度，下载完成后，点击触发安装。

	 

	用于下载文件和显示现在进度的线程类如下：

	 

	 

	package com.channelsoft.ahzyfis.util; 

	 

	import java.io.File; 

	import java.io.FileOutputStream; 

	import java.io.InputStream; 

	import java.net.HttpURLConnection; 

	import java.net.URL; 

	 

	import android.app.Notification; 

	import android.app.NotificationManager; 

	import android.app.PendingIntent; 

	import android.content.Context; 

	import android.content.Intent; 

	import android.net.Uri; 

	import android.os.Environment; 

	import android.os.Handler; 

	import android.os.Message; 

	import android.util.Log; 

	import android.widget.RemoteViews; 

	import android.widget.Toast; 

	 

	import com.channelsoft.ahzyfis.AhzyFisActivity; 

	import com.channelsoft.ahzyfis.R; 

	 

	/**

	 * 

	 * <dl>

	 * <dt>AppFileDownUtils.java</dt>

	 * <dd>Description: 文件下载</dd>

	 * <dd>Copyright: Copyright (C) 2011</dd>

	 * <dd>Company: </dd>

	 * <dd>CreateDate: 2011-10-19</dd>

	 * </dl>

	 * 

	 * @author ZhanHua

	 */ 

	public class AppFileDownUtils extends Thread { 

	 

	    private Context mContext; 

	    private Handler mHandler; 

	    private String mDownloadUrl; // 文件下载url，已做非空检查 

	    private String mFileName; 

	    private Message msg; 

	 

	    private final String APP_FOLDER = "DownDemo"; // sd卡应用目录 

	    private final String APK_FOLDER = "apkFile"; // 下载apk文件目录 

	 

	    public static final int MSG_UNDOWN = 0; //未开始下载 

	    public static final int MSG_DOWNING = 1; // 下载中 

	    public static final int MSG_FINISH = 1; // 下载完成 

	    public static final int MSG_FAILURE = 2;// 下载失败 

	 

	    private NotificationManager mNotifManager; 

	    private Notification mDownNotification; 

	    private RemoteViews mContentView; // 下载进度View 

	    private PendingIntent mDownPendingIntent; 

	 

	    public AppFileDownUtils(Context context, Handler handler, 

	            String downloadUrl, String fileName) { 

	        mContext = context; 

	        mHandler = handler; 

	        mDownloadUrl = downloadUrl; 

	        mFileName = fileName; 

	        mNotifManager = (NotificationManager) mContext 

	                .getSystemService(Context.NOTIFICATION_SERVICE); 

	        msg = new Message(); 

	    } 

	 

	    @Override 

	    public void run() { 

	        try { 

	            if (Environment.getExternalStorageState().equals( 

	                    Environment.MEDIA_MOUNTED)) { 

	                Message downingMsg = new Message(); 

	                downingMsg.what = MSG_DOWNING; 

	                mHandler.sendMessage(downingMsg); 

	                // SD卡准备好 

	                File sdcardDir = Environment.getExternalStorageDirectory(); 

	                // 文件存放路径：sdcard/DownDemo/apkFile 

	                File folder = new File(sdcardDir + File.separator + APP_FOLDER 

	                        + File.separator + APK_FOLDER); 

	                if (!folder.exists()) { 

	                    //创建存放目录 

	                    folder.mkdir(); 

	                } 

	                File saveFilePath = new File(folder, mFileName); 

	                System.out.println(saveFilePath); 

	                mDownNotification = new Notification( 

	                        android.R.drawable.stat_sys_download, mContext 

	                                .getString(R.string.notif_down_file), System 

	                                .currentTimeMillis()); 

	                mDownNotification.flags = Notification.FLAG_ONGOING_EVENT; 

	                mDownNotification.flags = Notification.FLAG_AUTO_CANCEL; 

	                mContentView = new RemoteViews(mContext.getPackageName(), 

	                        R.layout.custom_notification); 

	        &nb

补充：移动开发 , Android ,

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