2010.12.14——— android 应用的自动更新

2010.12.14——— android 应用的自动更新

参考：http://ming-fanglin.iteye.com/blog/795450
http://www.androidres.com/index.php/2009/04/13/add-liveupdate-to-android-applications/
http://www.cnblogs.com/qianxudetianxia/archive/2011/04/26/2010930.html

看了网上的一些东西自己觉得思路大致分三步：

1、检查是否更新
2、下载最新apk文件
3、更新应用

代码如下：

UpdateProject.java

package com.huitu.project;import java.io.File;import java.io.FileOutputStream;import java.io.IOException;import java.io.InputStream;import java.util.List;import org.apache.http.HttpEntity;import org.apache.http.HttpResponse;import org.apache.http.client.ClientProtocolException;import org.apache.http.client.HttpClient;import org.apache.http.client.methods.HttpGet;import org.apache.http.impl.client.DefaultHttpClient;import android.app.Activity;import android.app.ActivityManager;import android.app.ActivityManager.RunningAppProcessInfo;import android.app.AlertDialog;import android.app.Dialog;import android.app.ProgressDialog;import android.content.Context;import android.content.DialogInterface;import android.content.Intent;import android.content.SharedPreferences;import android.content.SharedPreferences.Editor;import android.content.pm.PackageInfo;import android.net.Uri;import android.os.Bundle;import android.os.Environment;import android.os.Handler;import android.view.KeyEvent;import com.huitu.util.HttpUtil;public class UpdateProject extends Activity{private ProgressDialog pd;private Handler mProgressHandler = new Handler();private Intent intent;//private UninstallReceiver ur;@Overrideprotected void onCreate(Bundle savedInstanceState) {// TODO Auto-generated method stubsuper.onCreate(savedInstanceState);setContentView(R.layout.updateproject);intent = new Intent(this,MainActivity.class);SharedPreferences sp = getSharedPreferences("version", Context.MODE_PRIVATE);long lastUpdateTime = sp.getLong("lastUpdateTime", System.currentTimeMillis());//更新间隔至少一天//if(lastUpdateTime + (24*60*60*1000)<System.currentTimeMillis()){lastUpdateTime = System.currentTimeMillis();Editor editor = sp.edit();editor.putLong("lastUpdateTime", lastUpdateTime);editor.commit();if(checkUpdate()){Dialog dialog = new AlertDialog.Builder(this).setTitle("系统更新").setMessage("已有新版本，是否更新？").setPositiveButton("确定",new DialogInterface.OnClickListener() {public void onClick(DialogInterface dialog, int which) {pd = new ProgressDialog(UpdateProject.this);pd.setMessage("正在更新，请稍后...");pd.show();down(HttpUtil.BASE_URL+"android_file/cpjw.apk");}}).setNegativeButton("取消", new DialogInterface.OnClickListener() {public void onClick(DialogInterface dialog, int which) {startActivity(intent);}}).create();dialog.show();}else{startActivity(intent);}//}else{//startActivity(intent);//}}//判断是否需要更新private boolean checkUpdate(){String url = HttpUtil.BASE_URL+"android_checkUpdate.action";try {PackageInfo info = this.getPackageManager().getPackageInfo(this.getPackageName(), 0);int oldVersion = info.versionCode;System.out.println(oldVersion);String flat = HttpUtil.queryStringForPost(url);int newVersion = Integer.parseInt(flat);System.out.println(oldVersion+"============"+newVersion);if(newVersion > oldVersion){return true;}} catch (Exception e) {// TODO Auto-generated catch blocke.printStackTrace();}return false;}private void down(final String url){ new Thread() {              public void run() {                  HttpClient client = new DefaultHttpClient();                  HttpGet get = new HttpGet(url);                  HttpResponse response;                  try {                      response = client.execute(get);                      HttpEntity entity = response.getEntity();                      long length = entity.getContentLength();                      InputStream is = entity.getContent();                      FileOutputStream fileOutputStream = null;                      if (is != null) {                            File file = new File(Environment                                  .getExternalStorageDirectory(), "cpjw.apk");                          fileOutputStream = new FileOutputStream(file);                                                    byte[] buf = new byte[1024];                          int ch = -1;                          while ((ch = is.read(buf)) != -1) {                              fileOutputStream.write(buf, 0, ch);                          }                        }                      fileOutputStream.flush();                      if (fileOutputStream != null) {                          fileOutputStream.close();                      }                      update();                                    } catch (ClientProtocolException e) {                      // TODO Auto-generated catch block                      e.printStackTrace();                  } catch (IOException e) {                      // TODO Auto-generated catch block                      e.printStackTrace();                  }              }            }.start(); }private void update() {    mProgressHandler.post(new Runnable() {                public void run() {                pd.cancel();            install();                finish();            }            });            }           private void install() {       Intent i = new Intent();   //i.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);         i.setAction(Intent.ACTION_VIEW);            i.setDataAndType(Uri.fromFile(new File("/sdcard/cpjw.apk")),                    "application/vnd.android.package-archive");            startActivity(i);          //finish();    }       @Overridepublic boolean onKeyDown(int keyCode, KeyEvent event) {// 按下键盘上返回按钮if (keyCode == KeyEvent.KEYCODE_BACK) {new AlertDialog.Builder(this).setMessage("确定退出系统吗？").setNegativeButton("取消",new DialogInterface.OnClickListener() {public void onClick(DialogInterface dialog,int which) {}}).setPositiveButton("确定",new DialogInterface.OnClickListener() {public void onClick(DialogInterface dialog,int whichButton) {finish();}}).show();return true;} else {return super.onKeyDown(keyCode, event);}}@Overrideprotected void onDestroy() {super.onDestroy();// 或者下面这种方式//System.exit(0);//建议用这种android.os.Process.killProcess(android.os.Process.myPid());}}

首先这个Activity 是在我们的应用启动时就转到这个Activity里面判断更新如果没有更新就转到业务应用界面

1、判断是否需要更新

主要是根据版本号来控制在清单文件里面

 <manifest xmlns:android="http://schemas.android.com/apk/res/android"      package="com.huitu.project"      android:versionCode="1"      android:versionName="1.0">

我们在服务器建一张表表里可以只有一条数据这个数据就是最新的版本号

我们获得这个版本号如果大于手机当前版本号就提示更新

2、下载最新apk

我们在服务器可以写一个文件上传的页面把文件上传到一个固定的目录下面上传成功后还要更新数据库最新版本号

3、更新apk

i.setAction(Intent.ACTION_VIEW);            i.setDataAndType(Uri.fromFile(new File("/sdcard/cpjw.apk")),                    "application/vnd.android.package-archive");            startActivity(i);

这样就会开始安装apk

但是这里有个问题总是提示“应用程序未安装”

下载时成功了但是就是安装不上

我在手机上也是安装不上只能把原来的应用卸载然后安装才会成功

后来我就想是不是可以在程序里面先卸载再安装啊于是：

//   private void uninstall(){//   Intent intent = new Intent(Intent.ACTION_DELETE);    //   Uri data = Uri.parse("package:"+this.getPackageName());//   intent.setData(data);//   startActivity(intent);//   }//   //   private class UninstallReceiver extends BroadcastReceiver{////   @Override//   public void onReceive(Context context, Intent intent) {//   System.out.println("rrrrrrrrrrrrrrr");//   Toast.makeText(context, "1345435", 1).show();//   install();//   }//   //   }//   ////   @Override//   protected void onResume() {//   IntentFilter filter = new IntentFilter(Intent.ACTION_PACKAGE_DATA_CLEARED);  //       filter.addAction(Intent.ACTION_PACKAGE_REMOVED);  //       filter.addDataScheme("package");  //       ur = new UninstallReceiver();  //       registerReceiver(ur, filter);  //       super.onResume();  //   }@Overrideprotected void onDestroy() {super.onDestroy();// 或者下面这种方式//System.exit(0);//建议用这种//取消注册unregisterReceiver(ur);android.os.Process.killProcess(android.os.Process.myPid());}

但是这个是不行的应该只能监听别的应用卸载监听不到自身吧

卸载后应用就直接退出了根本不会执行下载和安装了

这个也是一个问题希望有人能解决。。。。

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