Android 客户端自动升级代码及“应用程序未安装”的解决办法

下载apk到sd卡中需要在manifest.xml设置权限

   <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
    <uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS"/>

调试的时候能正常下载新版程序，但是在打开安装时一直提示“应用程序未安装”，纠结了半天终于发现是程序的签名问题。 手机安装的apk签名要与新下载的apk签名保持一致才能更新。

eclipse环境下打包用于更新的新版本时在项目上右键选择“Android Tool” – “Export Signed Application Package”

使用默认的debug签名，我的debug签名路径为C:\Users\Administrator\.android\debug.keystore

debug.keystore 默认密码为 android

也可以创建自己的签名 但要注意旧新版本的apk签名必须保持一致。

下面贴出我的版本更新类

GetVersion.java

//获取当前apk版本

package com.maimaicha.Utils;

import com.maimaicha.Core.Const;

import android.content.Context;
import android.content.pm.PackageManager.NameNotFoundException;
import android.util.Log;
/**
 * 获取版本号及版本名称
 * @author Tyler
 *
 */
public class GetVersion
{
 private static final String TAG = "Version";

 /**
  * 获取版本ID
  * @param context
  * @return
  */
 public static int getVerCode(Context context) {   
        int verCode = -1;   
        try {   
            verCode = context.getPackageManager().getPackageInfo(   
                    Const.getPackage, 0).versionCode;   
        } catch (NameNotFoundException e) {   
            Log.e(TAG, e.getMessage());   
        }   
        return verCode;   
    }   
      /**
       * 获取版面名称
       * @param context
       * @return
       */
    public static String getVerName(Context context) {   
        String verName = "";   
        try {   
            verName = context.getPackageManager().getPackageInfo(   
              Const.getPackage, 0).versionName;   
        } catch (NameNotFoundException e) {   
            Log.e(TAG, e.getMessage());   
        }   
        return verName;      
} 
}

AppStartActivity.java

// 程序启动类

package com.maimaicha.Activity;

import com.maimaicha.Core.DBHelper;
import com.maimaicha.Core.MessageActivity;
import com.maimaicha.Utils.MMCDialog;
import com.maimaicha.Utils.NetUtil;
import com.maimaicha.Utils.GetVersion;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.os.Handler;

public class AppStartActivity extends Activity
{
 private final int SPLASH_DISPLAY_LENGHT = 3000; // 延迟三秒
 private UpdateManager mUpdateManager;

 @Override
 protected void onCreate(Bundle savedInstanceState)
 {
  // TODO Auto-generated method stub
  super.onCreate(savedInstanceState);
  setContentView(R.layout.welcom);
  MessageActivity.addActivity(this);
  new Handler().postDelayed(new Runnable()
  {
   public void run()
   {
    if (NetUtil.isNetworkAvailable(AppStartActivity.this))
    {
     if (NetUtil.pingIpAddr("123.232.103.193"))//api服务器IP地址
     {
      // 这里来检测版本是否需要更新
      int versioncode = GetVersion.getVerCode(AppStartActivity.this);
      if (versioncode < 1)// 这里2更改为API返回版本号
      {
       mUpdateManager = new UpdateManager(AppStartActivity.this);
       mUpdateManager.checkUpdateInfo();
      } else
      {
       Intent mainIntent = new Intent(AppStartActivity.this, HomeActivity.class);
       AppStartActivity.this.startActivity(mainIntent);
       DBHelper.DBopenorclose(AppStartActivity.this, 1);
       AppStartActivity.this.finish();
      }

     } else
     {
      // 弹出警告
      MMCDialog.Detect_network_dialog(AppStartActivity.this, R.string.operate, R.string.internetError, R.string.outapply);
     }
    } else
    {
     // 弹出警告
     MMCDialog.Detect_network_dialog(AppStartActivity.this, R.string.operate, R.string.internetError, R.string.outapply);
    }
   }

  }, SPLASH_DISPLAY_LENGHT);
 }

}

 

UpdateManager.java

//下载apk 更新应用操作类

package com.maimaicha.Activity;

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 com.maimaicha.Core.DBHelper;

import android.app.Activity;
import android.app.AlertDialog;
import android.app.Dialog;
import android.app.AlertDialog.Builder;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.DialogInterface.OnClickListener;
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;
import android.widget.Toast;

public class UpdateManager {

 private Context mContext;
 
 //提示语
 private String updateMsg = "有最新的软件包哦，快下载吧~";
 
 //返回的安装包url
 private String apkUrl = "http://www.maimaicha.com/maimaicha.apk";
 
 
 private Dialog noticeDialog;
 
 private Dialog downloadDialog;
  /* 下载包安装路径 */
    private static final String savePath = "/sdcard/download/";
    
    private static final String saveFileName = savePath + "maimaicha.apk";

    /* 进度条与通知ui刷新的handler和msg常量 */
    private ProgressBar mProgress;

    
    private static final int DOWN_UPDATE = 1;
    
    private static final int DOWN_OVER = 2;
    
    private int progress;
    
    private Thread downLoadThread;
    
    private boolean interceptFlag = false;
    
    private Handler mHandler = new Handler(){
     public void handleMessage(Message msg) {
      switch (msg.what) {
   case DOWN_UPDATE:
    mProgress.setProgress(progress);
    break;
   case DOWN_OVER:
    
    installApk();
    break;
   default:
    break;
   }
     };
    };
    
 public UpdateManager(Context context) {
  this.mContext = context;
 }
 
 //外部接口让主Activity调用
 public void checkUpdateInfo(){
  showNoticeDialog();
 }
 
 
 private void showNoticeDialog(){
  AlertDialog.Builder builder = new Builder(mContext);
  builder.setTitle("软件版本更新");
  builder.setMessage(updateMsg);
  builder.setPositiveButton("下载", new OnClickListener() {   
   @Override
   public void onClick(DialogInterface dialog, int which) {
    dialog.dismiss();
    showDownloadDialog();   
   }
  });
  builder.setNegativeButton("以后再说", new OnClickListener() {   
   @Override
   public void onClick(DialogInterface dialog, int which) {
    dialog.dismiss();
    Intent mainIntent = new Intent(mContext, HomeActivity.class);
    mContext.startActivity(mainIntent);
    DBHelper.DBopenorclose(mContext, 1);
    ((Activity) mContext).finish();
   }
  });
  noticeDialog = builder.create();
  noticeDialog.show();
 }
 
 private void showDownloadDialog(){
  AlertDialog.Builder builder = new Builder(mContext);
  builder.setTitle("软件版本更新");
  
  final LayoutInflater inflater = LayoutInflater.from(mContext);
  View v = inflater.inflate(R.layout.progress, null);
  mProgress = (ProgressBar)v.findViewById(R.id.progress);
  
  builder.setView(v);
  builder.setNegativeButton("取消", new OnClickListener() { 
   @Override
   public void onClick(DialogInterface dialog, int which) {
    dialog.dismiss();
    interceptFlag = true;
    Intent mainIntent = new Intent(mContext, HomeActivity.class);
    mContext.startActivity(mainIntent);
    DBHelper.DBopenorclose(mContext, 1);
    ((Activity) mContext).finish();
   }
  });
  downloadDialog = builder.create();
  downloadDialog.show();
  
  downloadApk();
 }
 
 private Runnable mdownApkRunnable = new Runnable() { 
  @Override
  public void run() {
   try {
    URL url = new URL(apkUrl);
   
    HttpURLConnection conn = (HttpURLConnection)url.openConnection();
    conn.connect();
    int length = conn.getContentLength();
    InputStream is = conn.getInputStream();
    
    File file = new File(savePath);
    if(!file.exists()){
     file.mkdir();
    }
    String apkFile = saveFileName;
    File ApkFile = new File(apkFile);
    FileOutputStream fos = new FileOutputStream(ApkFile);
    
    int count = 0;
    byte buf[] = new byte[1024];
    
    do{          
        int numread = is.read(buf);
        count += numread;
           progress =(int)(((float)count / length) * 100);
           //更新进度
           mHandler.sendEmptyMessage(DOWN_UPDATE);
        if(numread <= 0){ 
         //下载完成通知安装
         mHandler.sendEmptyMessage(DOWN_OVER);
         break;
        }
        fos.write(buf,0,numread);
       }while(!interceptFlag);//点击取消就停止下载.
    
    fos.close();
    is.close();
   } catch (MalformedURLException e) {
    e.printStackTrace();
   } catch(IOException e){
    Log.e("aaaaaaaa", e.toString());
    e.printStackTrace();
   }
   
  }
 };
 
  /**
     * 下载apk
     * @param url
     */
 
 private void downloadApk(){
  downLoadThread = new Thread(mdownApkRunnable);
  downLoadThread.start();
 }
  /**
     * 安装apk
     * @param url
     */
 private void installApk(){
  File apkfile = new File(saveFileName);
        if (!apkfile.exists()) {
            return;
        }    
        Intent i = new Intent(Intent.ACTION_VIEW);
        i.setDataAndType(Uri.parse("file://" + apkfile.toString()), "application/vnd.android.package-archive"); 
        mContext.startActivity(i);

 }
}