android自动更新版本，始终报“解析程度包时出现错误”提示，求解？？？

阿不阿 2014-04-26 07:34:50

最近在做程度登录界面时弹出自动升级提示，已经能够从服务器下载最新版app到本机，但就是安装的时候始终报“解析程序包时出现错误”的提示，但是我直接在下载目录里面打开apk，就可以正常安装，求大神解答，代码如下：



package net.iwetao.init;



import net.iwetao.R;



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.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.view.LayoutInflater;

import android.view.View;

import android.view.Window;

import android.widget.Button;

import android.widget.ProgressBar;



public class UpdateManager {



	private Context mContext;

		

	//返回的安装包url

	private String apkUrl = "http://qiye.iwetao.net/clientAPI/iwetao_1.3.3.apk";

		

	private Dialog downloadDialog;

	

	 /* 下载包安装路径 */

    private static final String savePath = "sdcard/Download/";

    

    private static final String saveFileName =  "UpdateDemoRelease.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:

				android.util.Log.i("down_over","-----------created-----------");

				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(){

		final AlertDialog alg = new AlertDialog.Builder(mContext).create();

		alg.show();

		Window win = alg.getWindow();

		win.setContentView(R.layout.common_alert_dialog_update);

		Button positiveButton = (Button)win.findViewById(R.id.PositiveButton);

		Button negativeButton = (Button)win.findViewById(R.id.NegativeButton);

		positiveButton.setOnClickListener(new View.OnClickListener() {		

			@Override

			public void onClick(View v) {

				// TODO Auto-generated method stub

				alg.dismiss();

				showDownloadDialog();	

			}

		});

		negativeButton.setOnClickListener(new View.OnClickListener() {			

			@Override

			public void onClick(View v) {

				// TODO Auto-generated method stub

				alg.dismiss();

			}

		});

	}

	

	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.update_progress, null); 

		mProgress = (ProgressBar)v.findViewById(R.id.update_progress); 

		

		builder.setView(v);

		builder.setNegativeButton("取消", new OnClickListener() {	

			@Override

			public void onClick(DialogInterface dialog, int which) {

				dialog.dismiss();

				interceptFlag = true;

			}

		});

		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();

				}

				File ApkFile = new File(file,saveFileName);

				FileOutputStream fos = new FileOutputStream(ApkFile);

		  	    //FileOutputStream fos = mContext.openFileOutput(ApkFile.getName(), Context.MODE_WORLD_READABLE);

		  	    //fos.flush();

				fos.flush();

		  	    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);

		    	    android.util.Log.i("numread",""+numread);

		    		if(numread <= 0){	

		    			//下载完成通知安装

		    			android.util.Log.i("progress","------下载完成啦------");

		    			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) {

			    android.util.Log.i("--------MalformedURLException---------",e.toString());

			} catch(IOException e){

				android.util.Log.i("IOException",e.toString());

			}

			

		}

	};

	

	 /*

     * 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(savePath+saveFileName);

		android.util.Log.i("apkfile","-------"+apkfile);

        if (!apkfile.exists()) {

            return;

        }   

        try

        {

           //以下代码执行错误，但是直接在下载的目录里面打开apk，又可以正常安装，也就是下载的apk数据应该是完整的

           Intent i = new Intent(Intent.ACTION_VIEW);

           i.setDataAndType(Uri.parse("file://" + apkfile.toString()), "application/vnd.android.package-archive"); 

           mContext.startActivity(i);

        }

        catch(Exception e)

        {

        	android.util.Log.i("installApk Exception",e.toString());

        }

	

	}

}