轉的:适合新手學習,但在實際項目中不可這麼做。
以下是我轉的内容:
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各種平台軟體更新做法差不多,大體做法如下:
1.伺服器存放一個最新版本的xml檔案,或者存在資料庫,各種做法都可以。
1.1xml檔案存儲verCode verName updateUrl等資訊
1.2使用者安裝的軟體的verCode和伺服器上取得的做比較,檢測到版本低就更新
2.下面是Android手機軟體版本更新的教程
2.1項目目錄

2.2編寫UpdateManager類
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 = "親,有新版本,快下載下傳吧!"; //下載下傳消息提示
private Dialog noticeDialog; //下載下傳提示對話框
private Dialog downloadDialog; //下載下傳進度對話框
private ProgressBar mProgressBar; //進度條
private Boolean interceptFlag = false; //标記使用者是否在下載下傳過程中取消下載下傳
private Thread downloadApkThread = null; //下載下傳線程
private final String apkUrl = "http://www.ypdm.com/hyjj.apk"; //apk的URL位址
private final String savePath = "/sdcard/UpdateDemo/"; //下載下傳的apk存放的路徑
private final String saveFileName = savePath + "hyjjrelease.apk"; //下載下傳的apk檔案
private int progress = 0; //下載下傳進度
private final int DOWNLOAD_ING = 1; //标記正在下載下傳
private final int DOWNLOAD_OVER = 2; //标記下載下傳完成
private final String TAG="版本更新"; //日志列印标簽
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:
// 更新進度條
mProgressBar.setProgress(progress);
break;
case DOWNLOAD_OVER:
downloadDialog.dismiss();
installApk();
//安裝
default:
}
}
};
/*
* 構造方法
*/
public UpdateManager(Context context) {
this.mContext = context;
}
* 檢查是否有需要更新,具體比較版本xml
public void checkUpdate() {
// 到伺服器檢查軟體是否有新版本
//如果有則
showNoticeDialog();
* 顯示版本更新對話框
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("以後再說", new OnClickListener() {
noticeDialog = builder.create();
noticeDialog.show();
* 彈出下載下傳進度對話框
private void showDownloadDialog() {
builder.setTitle("軟體更新");
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() {
interceptFlag = true;
downloadDialog = builder.create();
downloadDialog.show();
downloadLatestVersionApk();
* 下載下傳最新的apk檔案
private void downloadLatestVersionApk() {
downloadApkThread = new Thread(downloadApkRunnable);
downloadApkThread.start();
//匿名内部類,apk檔案下載下傳線程
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, "總位元組數:"+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, "下載下傳進度"+progress);
mhandler.sendEmptyMessage(DOWNLOAD_ING);
if (readnum <= 0) {
// 下載下傳結束
mhandler.sendEmptyMessage(DOWNLOAD_OVER);
break;
}
out.write(buffer,0,readnum);
} while (!interceptFlag);
is.close();
out.close();
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
* 安裝下載下傳的apk檔案
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);
}
以上代碼注釋足夠詳細。不解釋了。。
2.3在Main中調用試試吧。
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,就這些。希望對你有幫助。