Android中apk检测更新类库，下载等

最新推荐文章于 2023-09-22 22:50:15 发布

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最新推荐文章于 2023-09-22 22:50:15 发布

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分类专栏： Android进阶

本文链接：https://blog.youkuaiyun.com/appandroid/article/details/12652839

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该项目提供了一个Android apk检测更新的功能，通过DownLoadUpgradeFileTask类实现。该类需要四个参数，包括升级文件URL、下载目录、是否支持断点续传。用户可以设置断点续下以优化下载体验。

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项目地址：

https://github.com/wxz/upgrade

在此类库中，可以进行版本的升级

主要代码如下：

package com.example.nw;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.RandomAccessFile;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
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.AsyncTask;
import android.support.v4.app.NotificationCompat;
import android.text.TextUtils;

/**
 * 
 * @description 
 * 
 *
 *
 * @email 6881797@163.com
 */
public class DownLoadUpgradeFileTask extends AsyncTask<Void, Integer, String> {

	private String mUrl;
	private Context mContext;
	private String mDownloadFileDir;
	private boolean mSupportBreakPoint;
	private NotificationManager mNotiManager;
	private Notification mNoti;
	private NotificationCompat.Builder mBuilder;
	private static final int notificationId = (int) System.currentTimeMillis();

	/***
	 * 
	 * @param context  
	 * @param url  The url of upgrade file url ,the format like: http://www...... .apk 
	 * @param downLoadFileDir   the dir of the downloading upgrade file. Format like : /sdcard/...../ (It is required that this dir is only used to store the download upgrade file)
	 * @param supportedBreakPoint  true means the downloading should support breakpoint continuingly.False means that every download is a new task ,and will
	 * clear the former download.
	 */
	public DownLoadUpgradeFileTask(Context context, String url,String downLoadFileDir,boolean supportedBreakPoint) {
		mUrl = url;
		mContext = context.getApplicationContext();
		mDownloadFileDir = downLoadFileDir;
		mSupportBreakPoint = supportedBreakPoint;
		mNotiManager = (NotificationManager) context
				.getSystemService(Context.NOTIFICATION_SERVICE);
		mBuilder = new NotificationCompat.Builder(mContext);
		mBuilder.setAutoCancel(false);
		mBuilder.setContentTitle(mContext
				.getString(R.string.upgrade_is_loading));
		mBuilder.setSmallIcon(R.drawable.ic_notification);
		mBuilder.setProgress(100, 0, false);
		mBuilder.setWhen(System.currentTimeMillis());
		mBuilder.setTicker(mContext.getString(R.string.upgrade_is_loading));
		mNoti = mBuilder.build();

		mNoti.flags =  Notification.FLAG_SHOW_LIGHTS;

	}

	@Override
	protected void onPreExecute() {
		mNoti = mBuilder.build();
		mNoti.flags = Notification.FLAG_SHOW_LIGHTS;
		mNoti.defaults = Notification.DEFAULT_SOUND;
		mNoti.ledARGB = 0xff00ffff;
		mNoti.ledOffMS = 2000;
		mNoti.ledOnMS = 2000;
		mNotiManager.notify(notificationId, mNoti);
		super.onPreExecute();
	}

	@Override
	protected String doInBackground(Void... params) {
		String filePath = null;
		InputStream is = null;
		FileOutputStream fos = null;
		HttpURLConnection conn = null;
		RandomAccessFile raf = null;
		try {
			long total = UpgradeUtil.getNetFileSize(mUrl);
			URL url = new URL(mUrl);
			conn = (HttpURLConnection) url.openConnection();
			conn.setConnectTimeout(5 * 1000);
			conn.setReadTimeout(1000 * 10);
			conn.setRequestMethod("GET");
			
			String fileName = MD5.md5s(mUrl+ UpgradeUtil.getPackageVersionName(mContext)+UpgradeUtil.getPackageVersionCode(mContext))+".apk";
			File upgradeDir = new File(mDownloadFileDir);
			File upgrade = new File(upgradeDir,fileName);
		
			if(mSupportBreakPoint  && upgrade.exists() && upgrade.length()<=total){
				long fileLength = upgrade.length();
				
				if(fileLength == total){
					filePath = upgrade.getAbsolutePath();
					return filePath;
				}
				conn.setRequestProperty("RANGE", "bytes="+fileLength+"-");
				conn.connect();
				is = conn.getInputStream();
				int preciousProgress = 0;
				long size = fileLength;
				int count = 0;
				raf = new RandomAccessFile(upgrade, "rws");
				byte[] temp = new byte[1024 * 60];
				raf.seek(fileLength);
				count = is.read(temp, 0, temp.length);
				while (count > 0) {
					if(isCancelled()){
						return null;
					}
					raf.write(temp, 0, count);
					size += count;
					int progress =(int) (size * 100 / total);
					if (progress - preciousProgress > 0) {
						publishProgress(progress);
						preciousProgress = progress;
					}
					count = is.read(temp, 0, temp.length);
				}
				raf.close();
				filePath = upgrade.getAbsolutePath();
			}else{
				conn.connect();
				is = conn.getInputStream();
				UpgradeUtil.deleteContentsOfDir(upgradeDir);
				fos = new FileOutputStream(upgrade);
				long size = 0;
				int count = 0;
				byte[] temp = new byte[1024 * 60];
				count = is.read(temp, 0, temp.length);
				int preciousProgress = 0;
				while (count > 0) {
					if(isCancelled()){
						return null;
					}
					fos.write(temp, 0, count);
					size += count;
					int progress =(int) (size * 100 / total);
					if (progress - preciousProgress > 0) {
						publishProgress(progress);
						preciousProgress = progress;
					}
					count = is.read(temp, 0, temp.length);
				}
				fos.flush();
				filePath = upgrade.getAbsolutePath();
			}
			//File upgrade = new File(upgradeDir, "focus_second.apk");
		} catch (MalformedURLException e) {
			LogUtil.e(e);
			cancel(true);
			return null;
		} catch (IOException e) {
			LogUtil.e(e);
			cancel(true);
			return null;
		} finally {
			UpgradeUtil.closeInputStream(is);
			UpgradeUtil.closeOutputStream(fos);
			if(raf!=null){
				try {
					raf.close();
				} catch (IOException e) {
					LogUtil.e(e);
				}
			}
		}

		return filePath;
	}

	@Override
	protected void onProgressUpdate(Integer... values) {
		LogUtil.i("the current percent of downloaded:" + values[0]);
		super.onProgressUpdate(values);
		if (values[0] < 100) {
			mBuilder.setContentText(mContext.getString(R.string.has_downed)
					+ " " + values[0] + "%");
			mNoti = mBuilder.setProgress(100, values[0], false).build();
			mNotiManager.notify(notificationId, mNoti);
		}
	}

	@Override
	protected void onPostExecute(String result) {
		if (TextUtils.isEmpty(result))
			return;
		super.onPostExecute(result);
		// mBuilder.setTicker(mContext.getString(R.string.downed_complete));
		Intent promptInstall = new Intent(Intent.ACTION_VIEW).setDataAndType(
				Uri.fromFile(new File(result)),
				"application/vnd.android.package-archive");
		promptInstall.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);

		mBuilder.setTicker(mContext.getString(R.string.downed_complete));
		mBuilder.setContentTitle(mContext.getString(R.string.downed_complete));
		mBuilder.setContentIntent(PendingIntent.getActivity(mContext, 0,
				promptInstall, PendingIntent.FLAG_UPDATE_CURRENT));
		mBuilder.setContentText(mContext.getString(R.string.has_downed) + " "
				+ 100 + "%");
		mBuilder.setDefaults(Notification.DEFAULT_SOUND);
		mNoti = mBuilder.setProgress(100, 100, false).build();
		mNoti.flags = Notification.FLAG_SHOW_LIGHTS;
		mNoti.defaults = Notification.DEFAULT_SOUND;
		mNoti.ledARGB = 0xff00ffff;
		mNoti.ledOffMS = 2000;
		mNoti.ledOnMS = 2000;
		mNotiManager.notify(notificationId, mNoti);

		mContext.startActivity(promptInstall);
	}

	@Override
	protected void onCancelled(String result) {
		mBuilder.setTicker(mContext.getString(R.string.download_fail));
		mBuilder.setContentTitle(mContext.getString(R.string.download_fail));
		mBuilder.setContentText(mContext.getString(R.string.please_try_later));
		mBuilder.setContentIntent(PendingIntent.getBroadcast(mContext, 0,
				new Intent(), PendingIntent.FLAG_NO_CREATE));
		mBuilder.setDefaults(Notification.DEFAULT_SOUND);
		mBuilder.setAutoCancel(true);
		mNoti = mBuilder.build();
		mNoti.flags = Notification.FLAG_SHOW_LIGHTS
				| Notification.FLAG_AUTO_CANCEL;
		mNoti.defaults = Notification.DEFAULT_SOUND;
		mNoti.ledARGB = 0xff00ffff;
		mNoti.ledOffMS = 2000;
		mNoti.ledOnMS = 2000;
		mNotiManager.notify(notificationId, mNoti);
	}

}

本项目的核心是 new 一个 DownLoadUpgradeFileTask 实例出来，他的构造方法 DownLoadUpgradeFileTask(Context context, String url,String downLoadFileDir,boolean supportedBreakPoint)
，有四个参数，url 是升级文件的url， downLoadFileDir 是存放下载文件的目录，要求这个目录下只能存放升级文件；supportedBreakPoint 是标识是否使用断点续下，true表示断点续下，false表示每次下载都是一次新的下载

源码下载