安卓 软件更新程序

首先，在manifest.xml配置文件中，会有当前安卓软件的版本号。

<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.cn.gordon.exhibition.walk.activity"
    android:versionCode="1"
    android:versionName="1.0.1" >

简单的思路就是把自己的版本号通过参数，传递给后台，由后台来判断是否要检测更新。（这里是把后台中最新的版本获取到，和本地的做对比。）

通过方法来获取本地的版本号：

public static String getVersionName(Context context) {
        String verName = "";
        try {
            verName = context.getPackageManager().getPackageInfo(PACKAGE_NAME,
                    0).versionName;
        } catch (NameNotFoundException e) {
            e.printStackTrace();
        }
        return verName;
    }

获取网络的版本号：

protected void getVersionFromNet(final View view) {
        Map<String, String> postvalues = new HashMap<String, String>();
        postvalues.put("", "");
        
        new NetUtils(new NetCallBack(){
            @Override
            public void getNet(NetCallBack_State arg0, String arg1) {
                switch (arg0) {
                case error:
                    Toast.makeText(getActivity(), "网络资源错误", Toast.LENGTH_SHORT).show();
                    break;
                case noNet:
                    Toast.makeText(getActivity(), "网络未开启", Toast.LENGTH_SHORT).show();
                    break;
                case wrong:
                    Toast.makeText(getActivity(), "网络数据错误"+arg1, Toast.LENGTH_SHORT).show();
                    break;
                case ok:
                    processUpdate(view,arg1);
                    break;
                default:
                    break;
                }
            }
        }).read(getActivity(), false, Utils.GETAPKVERSIONCODE_URL, null, null, false, postvalues, "GBK", true, true);
        
    }

返回的json在arg1中，解析json：

protected void processUpdate(View view ,String arg1) {
        try {
            JSONObject jo = new JSONObject(arg1);
            if (jo.optString("version").equals(Utils.getVersionName(getActivity()))) {
                Toast.makeText(getActivity(), "当前软件已经是最新版本~", Toast.LENGTH_SHORT).show();
            }else {
                String apkUrl = Utils.PICIP + "/iot-hmi-web/iot/" + jo.optString("url").replace("\", "/");
                System.out.println("apkUrl = "+apkUrl);
                String apkName = jo.optString("name");
                String versionName = jo.optString("version");
                
                global.setApkName(apkName);
                global.setApkUrl(apkUrl);
                PromptDialogPopupWindow pDialog = new PromptDialogPopupWindow(getActivity(), 4, "LoginActivity", 检测到新版本，
最新版本：V"+versionName+"
当前版本：V"+Utils.getVersionName(getActivity())+"
是否现在更新？");
                pDialog.showPopupWindow(view);
            }
        } catch (JSONException e) {
            e.printStackTrace();
            return;
        }
        
        
    }

解析完成后，弹出一个popupwindow来提示用户是否真的要更新？

package com.cn.gordon.exhibition.walk.popup;

import com.cn.gordon.exhibition.walk.activity.CreateBusinesscardActivity;
import com.cn.gordon.exhibition.walk.activity.DownApkActivity;
import com.cn.gordon.exhibition.walk.activity.LoginActivity;
import com.cn.gordon.exhibition.walk.activity.R;
import com.cn.gordon.exhibition.walk.application.GlobalVaries;
import android.annotation.TargetApi;
import android.app.Activity;
import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothManager;
import android.content.Context;
import android.content.Intent;
import android.graphics.drawable.BitmapDrawable;
import android.os.Bundle;
import android.view.Gravity;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.PopupWindow;
import android.widget.RelativeLayout.LayoutParams;
import android.widget.TextView;

public class PromptDialogPopupWindow {
    private Activity context;
    private Button btnOK,btnCancel;
    private TextView txtContent;
    private PopupWindow popWindow ;
    private GlobalVaries global;
    private String promptContent,activityName;
    private int goingFlag;//1:登录2:完善信息
    private int okCancel = 0;//init-->0,ok-->1,cancel-->2
    
    
    
    public PromptDialogPopupWindow(Activity context,int goingFlag,String activityName,String promptContent){
        this.context = context;
        this.promptContent = promptContent;
        this.activityName = activityName;
        this.goingFlag = goingFlag;
        init();
    }
        @SuppressWarnings("deprecation")
        private void init() {
            
            global = (GlobalVaries) context.getApplication();
            
            LayoutInflater inflater = LayoutInflater.from(context); 
             // 引入窗口配置文件 
            View viewPop = inflater.inflate(R.layout.popup_promptdialog, null); 
            txtContent = (TextView)viewPop.findViewById(R.id.promptcontent);
            btnOK = (Button)viewPop.findViewById(R.id.btn_ok);
            btnCancel = (Button)viewPop.findViewById(R.id.btn_cancel);
            // 创建PopupWindow对象 
            popWindow = new PopupWindow(viewPop, LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT, false); 
            // 需要设置一下此参数，点击外边可消失 
            popWindow.setBackgroundDrawable(new BitmapDrawable()); 
            //设置点击窗口外边窗口消失 
            popWindow.setOutsideTouchable(false); 
            // 设置此参数获得焦点，否则无法点击 
            popWindow.setFocusable(false); 
            
            txtContent.setText(promptContent);
            popWindow.update();
            
            btnOK.setOnClickListener(new OnClickListener() {
                
                @TargetApi(18)
                @Override
                public void onClick(View v) {
                    if (goingFlag==1) {//用户还没有登录
                        Intent in = new Intent(context,LoginActivity.class);
                        Bundle bundle = new Bundle();
                        bundle.putString("from", activityName);
                        in.putExtras(bundle);
                        context.startActivity(in);
                    }
                                                            if (goingFlag==4) {
                        //更新软件
                        String apkName = global.getApkName();
                        String apkUrl = global.getApkUrl();
                        Intent in = new Intent(context, DownApkActivity.class);
                        Bundle bundle = new Bundle();
                        bundle.putString("apkName", apkName);
                        bundle.putString("apkUrl", apkUrl);
                        in.putExtras(bundle);
                        context.startActivity(in);
                    }
                    okCancel = 1;
                    popWindow.dismiss(); 
                }
            });
            
            btnCancel.setOnClickListener(new OnClickListener() {
                @Override
                public void onClick(View v) {
                    okCancel = 2;
                    popWindow.dismiss(); 
                }
            });
            
            
            
    }
        
    public int getClickState(){
        return okCancel;
    }
        
    public boolean isShowing(){
        if (!popWindow.isShowing()) {
            return false;
        }else {
            return true;
        }
    }
    
    public int showPopupWindow(View parent) {  
        if (!popWindow.isShowing()) {  
            // 以下拉方式显示popupwindow  //Gravity.CENTER_HORIZONTAL|Gravity.CENTER_VERTICAL
            popWindow.showAtLocation(parent,Gravity.CENTER,0, 0);  
        } else {  
            popWindow.dismiss();  
        }  
        return okCancel ;
    }  
}

点击提示框中的确定之后，页面跳转到下载的Activity页面：

package com.cn.gordon.exhibition.walk.activity;

import java.io.File;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.URL;
import java.net.URLConnection;

import com.cn.gordon.exhibition.walk.utils.Utils;

import android.annotation.SuppressLint;
import android.app.Activity;
import android.content.Intent;
import android.graphics.Color;
import android.net.Uri;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ProgressBar;
import android.widget.TextView;
import android.widget.Toast;

public class DownApkActivity extends Activity {

    private Button btnOK,btnCancel;
    private TextView tvComplete;
    private static final String APK_PATH = Utils.getSDPath()+ java.io.File.separator +  "exhibition_walk"; // 存放各个下载器 27

    private Handler mHandler;
    private ProgressBar bar;
    private Bundle bundle;
    private String apkName,apkUrl;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.downloadapk);
        bundle = getIntent().getExtras();
        if (bundle!=null) {
            apkName = bundle.getString("apkName");
            apkUrl = bundle.getString("apkUrl");
        }
        init();
        setAction();
        if (apkName!=null&&apkUrl!=null&&!"".equals(apkName)&&!"".equals(apkUrl)) {
            downloadFile(apkUrl,apkName);
        }
    }
    @SuppressLint("HandlerLeak")
    private void init() {
        btnOK = (Button) findViewById(R.id.oksure);
        btnCancel = (Button) findViewById(R.id.nocancel);
        btnOK.setVisibility(View.INVISIBLE);
        btnCancel.setVisibility(View.INVISIBLE);
        tvComplete = (TextView) findViewById(R.id.tv_complete);
        bar = (ProgressBar) findViewById(R.id.progress_horizontal);
        mHandler = new Handler() {
            public void handleMessage(Message msg) {
                if (msg.what == 1) {
//                    String url = (String) msg.obj;
                    int length = msg.arg1;
                    int totalSize = msg.arg2;
                    int percent = 0;
                    if (totalSize!=0) {
                        percent = (100*length)/totalSize;
                    }
                    tvComplete.setText("下载进度："+percent+"%");
                    if (bar != null) {// 设置进度条按读取的length长度更新  
                        bar.setProgress(length);
                        bar.setMax(totalSize);
                        if (length >= totalSize) {
                            Toast.makeText(DownApkActivity.this, "下载完成！", Toast.LENGTH_SHORT).show(); 
                             // 下载完成后清除进度条并将map中的数据清空 45                         
//                            LinearLayout layout = (LinearLayout) bar.getParent();//FIXME
//                            layout.removeView(bar);
//                            ProgressBars.remove(url);
//                            downloaders.get(url).delete(url);
//                            downloaders.get(url).reset();
//                            downloaders.remove(url);
                            installApk(APK_PATH,apkName);
                        }
                     } 
                }
        } 
    };
    }
    private void setAction() {
        btnOK.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {
                // TODO Auto-generated method stub
                
            }
        });
        btnCancel.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {
                // TODO Auto-generated method stub
                
            }
        });
        
    }
    
    private void downloadFile(final String fileUrl,final String fileName){
        //准备拼接新的文件名（保存在存储卡后的文件名）
//        String newFilename = _urlStr.substring(_urlStr.lastIndexOf("/")+1);
//        newFilename = _dirName + newFilename;
        new Thread(new Runnable() {
            
            @Override
            public void run() {
                File file = new File(fileName);
                //如果目标文件已经存在，则删除。产生覆盖旧文件的效果
                if(file.exists())
                {
                    file.delete();
                }
                try {
                         // 构造URL   
                         URL url = new URL(fileUrl);
                         // 打开连接   
                         URLConnection con = url.openConnection();
                         //获得文件的长度
                         int contentLength = con.getContentLength();
                         System.out.println("长度 :"+contentLength);
                         // 输入流   
                         InputStream is = con.getInputStream();
                         // 64K的数据缓冲   
                         byte[] bs = new byte[1024*8];
                         // 读取到的数据长度   
                         int len;
                         //downloadSize
                         int downloadSize = 0;
                        
//                         Bundle bund = new Bundle();
                         // 输出的文件流   
                         OutputStream os = new FileOutputStream(APK_PATH+java.io.File.separator+fileName);
                         // 开始读取   
                         while ((len = is.read(bs)) != -1) {   
                             downloadSize+=len;
                             os.write(bs, 0, len);
                             Message message = new Message();
                             message.arg1 = downloadSize;
                             message.arg2 = contentLength;
                             message.what = 1;
                             mHandler.sendMessage(message);
                         }  
                         // 完毕，关闭所有链接   
                         os.close();  
                         is.close();
                            
                } catch (Exception e) {
                        e.printStackTrace();
                        Toast.makeText(DownApkActivity.this, "下载失败", Toast.LENGTH_SHORT).show();
//                        finish();
                        tvComplete.setTextColor(Color.YELLOW);
                        return;
                }
                
            }
        }).start();
        
    }
    
    
    /**
     * 安装APK文件
     */
    private void installApk(String filePath,String fileName)//TODO   search method parameters
    {
        File apkfile = new File(filePath,fileName);
        if (!apkfile.exists())
        {
            return;
        }
        // 通过Intent安装APK文件
        Intent i = new Intent(Intent.ACTION_VIEW);
        i.setDataAndType(Uri.parse("file://" + APK_PATH + java.io.File.separator +fileName), "application/vnd.android.package-archive");
        DownApkActivity.this.startActivity(i);
    }
    
}

下载完成后，便开始启动安装软件。