转的:适合新手学习,但在实际项目中不可这么做。
以下是我转的内容:
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各种平台软件更新做法差不多,大体做法如下:
1.服务器存放一个最新版本的xml文件,或者存在数据库,各种做法都可以。
1.1xml文件存储verCode verName updateUrl等信息
1.2用户安装的软件的verCode和服务器上取得的做比较,检测到版本低就更新
2.下面是Android手机软件版本更新的教程
2.1项目目录
2.2编写UpdateManager类
- package com.doublejun.update;
- import java.io.File;
- import java.io.FileOutputStream;
- import java.io.IOException;
- import java.io.InputStream;
- import java.net.HttpURLConnection;
- import java.net.MalformedURLException;
- import java.net.URL;
- import android.app.AlertDialog;
- import android.app.AlertDialog.Builder;
- import android.app.Dialog;
- import android.content.Context;
- import android.content.DialogInterface;
- import android.content.Intent;
- import android.content.DialogInterface.OnClickListener;
- import android.content.IntentFilter;
- import android.net.Uri;
- import android.os.Handler;
- import android.os.Message;
- import android.util.Log;
- import android.view.LayoutInflater;
- import android.view.View;
- import android.widget.ProgressBar;
- public class UpdateManager {
- private Context mContext;
- private final String updateMsg = "亲,有新版本,快下载吧!"; //下载消息提示
- private Dialog noticeDialog; //下载提示对话框
- private Dialog downloadDialog; //下载进度对话框
- private ProgressBar mProgressBar; //进度条
- private Boolean interceptFlag = false; //标记用户是否在下载过程中取消下载
- private Thread downloadApkThread = null; //下载线程
- private final String apkUrl = "http://www.ypdm.com/hyjj.apk"; //apk的URL地址
- private final String savePath = "/sdcard/UpdateDemo/"; //下载的apk存放的路径
- private final String saveFileName = savePath + "hyjjrelease.apk"; //下载的apk文件
- private int progress = 0; //下载进度
- private final int DOWNLOAD_ING = 1; //标记正在下载
- private final int DOWNLOAD_OVER = 2; //标记下载完成
- private final String TAG="版本更新"; //日志打印标签
- private Handler mhandler = new Handler() { //更新UI的handler
- @Override
- public void handleMessage(Message msg) {
- super.handleMessage(msg);
- switch (msg.what) {
- case DOWNLOAD_ING:
- // 更新进度条
- mProgressBar.setProgress(progress);
- break;
- case DOWNLOAD_OVER:
- downloadDialog.dismiss();
- installApk();
- //安装
- break;
- default:
- break;
- }
- }
- };
- /*
- * 构造方法
- */
- public UpdateManager(Context context) {
- this.mContext = context;
- }
- /*
- * 检查是否有需要更新,具体比较版本xml
- */
- public void checkUpdate() {
- // 到服务器检查软件是否有新版本
- //如果有则
- showNoticeDialog();
- }
- /*
- * 显示版本更新对话框
- */
- private void showNoticeDialog() {
- AlertDialog.Builder builder = new Builder(mContext);
- builder.setTitle("版本更新");
- builder.setMessage(updateMsg);
- builder.setPositiveButton("更新", new OnClickListener() {
- public void onClick(DialogInterface dialog, int which) {
- noticeDialog.dismiss();
- showDownloadDialog();
- }
- });
- builder.setNegativeButton("以后再说", new OnClickListener() {
- public void onClick(DialogInterface dialog, int which) {
- noticeDialog.dismiss();
- }
- });
- noticeDialog = builder.create();
- noticeDialog.show();
- }
- /*
- * 弹出下载进度对话框
- */
- private void showDownloadDialog() {
- AlertDialog.Builder builder = new Builder(mContext);
- builder.setTitle("软件更新");
- final LayoutInflater inflater = LayoutInflater.from(mContext);
- View v = inflater.inflate(R.layout.progress, null);
- mProgressBar = (ProgressBar) v.findViewById(R.id.updateProgress);
- builder.setView(v);
- builder.setNegativeButton("取消", new OnClickListener() {
- public void onClick(DialogInterface dialog, int which) {
- downloadDialog.dismiss();
- interceptFlag = true;
- }
- });
- downloadDialog = builder.create();
- downloadDialog.show();
- downloadLatestVersionApk();
- }
- /*
- * 下载最新的apk文件
- */
- private void downloadLatestVersionApk() {
- downloadApkThread = new Thread(downloadApkRunnable);
- downloadApkThread.start();
- }
- //匿名内部类,apk文件下载线程
- private Runnable downloadApkRunnable = new Runnable() {
- public void run() {
- try {
- URL url = new URL(apkUrl);
- HttpURLConnection conn = (HttpURLConnection) url
- .openConnection();
- conn.connect();
- int length = conn.getContentLength();
- Log.e(TAG, "总字节数:"+length);
- InputStream is = conn.getInputStream();
- File file = new File(savePath);
- if (!file.exists()) {
- file.mkdir();
- }
- File apkFile = new File(saveFileName);
- FileOutputStream out = new FileOutputStream(apkFile);
- int count = 0;
- int readnum = 0;
- byte[] buffer = new byte[1024];
- do {
- readnum = is.read(buffer);
- count += readnum;
- progress = (int) (((float) count / length) * 100);
- Log.e(TAG, "下载进度"+progress);
- mhandler.sendEmptyMessage(DOWNLOAD_ING);
- if (readnum <= 0) {
- // 下载结束
- mhandler.sendEmptyMessage(DOWNLOAD_OVER);
- break;
- }
- out.write(buffer,0,readnum);
- } while (!interceptFlag);
- is.close();
- out.close();
- } catch (MalformedURLException e) {
- e.printStackTrace();
- } catch (IOException e) {
- e.printStackTrace();
- }
- }
- };
- /*
- * 安装下载的apk文件
- */
- private void installApk() {
- File file= new File(saveFileName);
- if(!file.exists()){
- return;
- }
- Intent intent= new Intent(Intent.ACTION_VIEW);
- intent.setDataAndType(Uri.parse("file://"+file.toString()), "application/vnd.android.package-archive");
- mContext.startActivity(intent);
- }
- }
以上代码注释足够详细。不解释了。。
2.3在Main中调用试试吧。
- package com.doublejun.update;
- import android.app.Activity;
- 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);
- UpdateManager update = new UpdateManager(this);
- update.checkUpdate();
- }
- }
好吧,就这些。希望对你有帮助。