安卓技术版本更新

来源：互联网发布：音乐唱歌软件编辑：程序博客网时间：2024/05/04 07:43

MainActivity.java:

public class MainActivity extends Activity {

   private AlertDialog dialog;
   private Button btnUpdate;
   private ListView lv;
   private String path1 = "http://www.oschina.net/action/api/news_list?catalog=1&pageIndex=0&pageSize=20";

   @Override
   protected void onCreate(Bundle savedInstanceState) {
       super.onCreate(savedInstanceState);
       setContentView(R.layout.activity_main);
       // 找控件

       btnUpdate = (Button) findViewById(R.id.fin);

       // 设置版本更新的监听
       btnUpdate.setOnClickListener(new OnClickListener() {

           @Override
           public void onClick(View v) {
               dialog = new AlertDialog.Builder(MainActivity.this)
                       .setTitle("软件版本更新").setPositiveButton("立即更新", onclick)
                       .setNegativeButton("以后再说", null).create();

               //开启线程检查版本信息
               new Thread(new CheckVersionTask()).start();
           }
       });

   }

   /**
   * 版本更新的Hnadler
   */
   Handler handler = new Handler() {
       public void handleMessage(android.os.Message msg) {
           switch (msg.what) {
           case 0:
               dialog.setMessage(updateEntity.getUpdateLog());
               dialog.show();
               break;
           case 1:
               downLoadApk();
               break;

           }
       };
   };
   /*
   * 从服务器中下载APK
   */
   protected void downLoadApk() {
        final ProgressDialog pd;    //进度条对话框
        pd = new ProgressDialog(this);
        pd.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
        pd.setMessage("正在下载更新");
        pd.show();
        new Thread(){
            @Override
            public void run() {
                try {
                    File file = getFileFromServer(updateEntity.getDownloadUrl(), pd);
                    sleep(3000);

                    UpdateTools tools = new UpdateTools();
                    //安装APk
                    tools.installApk(file,MainActivity.this);
                    pd.dismiss(); //结束掉进度条对话框
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }}.start();
   }
   /**
   * 下载方法
   *
   * @param path
   * @param pd
   * @return
   * @throws Exception
   */
   public File getFileFromServer(String path, ProgressDialog pd)
           throws Exception {
       // 如果相等的话表示当前的sdcard挂载在手机上并且是可用的
       if (Environment.getExternalStorageState().equals(
               Environment.MEDIA_MOUNTED)) {
           URL url = new URL(path);
           HttpURLConnection conn = (HttpURLConnection) url.openConnection();
           conn.setConnectTimeout(5000);
           // 获取到文件的大小
           pd.setMax(conn.getContentLength());
           InputStream is = conn.getInputStream();
           File file = new File(Environment.getExternalStorageDirectory(),
                   "updata.apk");
           FileOutputStream fos = new FileOutputStream(file);
           BufferedInputStream bis = new BufferedInputStream(is);
           byte[] buffer = new byte[1024];
           int len;
           int total = 0;
           while ((len = bis.read(buffer)) != -1) {
               fos.write(buffer, 0, len);
               total += len;
               // 获取当前下载量
               pd.setProgress(total);
           }
           fos.close();
           bis.close();
           is.close();
           return file;
       } else {
           return null;
       }
   }
   /*
   * 从服务器获取xml解析并进行比对版本号
   */
   private Bean updateEntity;
   public class CheckVersionTask implements Runnable{


       public void run() {
            try {
                //从资源文件获取服务器地址
                String path = "http://www.oschina.net/MobileAppVersion.xml";
                //包装成url的对象
                URL url = new URL(path);
                HttpURLConnection conn = (HttpURLConnection) url.openConnection();
                conn.setConnectTimeout(5000);
                InputStream is =conn.getInputStream();
                updateEntity = UpdateTools.getUpdataInfo(is);
                //当前版本号
                int versionCode = MainActivity.this.getPackageManager().getPackageInfo(MainActivity.this.getPackageName(), 0).versionCode;

               if(Integer.parseInt(updateEntity.getVersionCode()) <= versionCode){
                    Log.i("xxx","版本号相同无需升级");
                }else{
                    Log.i("xxxx","版本号不同 ,提示用户升级 ");
                    handler.sendEmptyMessage(0);

                }
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
   }
   /**
   * 立即更新的监听
   */
   DialogInterface.OnClickListener onclick = new DialogInterface.OnClickListener() {

       @Override
       public void onClick(DialogInterface dialog, int which) {
           handler.sendEmptyMessage(1);

       }
   };

}

Bean.java:

public class Bean {
   private String versionCode;
   private String versionName;
   private String downloadUrl;
   private String updateLog;
   public String getUpdateLog() {
       return updateLog;
   }
   public void setUpdateLog(String updateLog) {
       this.updateLog = updateLog;
   }
   public String getVersionCode() {
       return versionCode;
   }
   public void setVersionCode(String versionCode) {
       this.versionCode = versionCode;
   }
   public String getVersionName() {
       return versionName;
   }
   public void setVersionName(String versionName) {
       this.versionName = versionName;
   }
   public String getDownloadUrl() {
       return downloadUrl;
   }
   public void setDownloadUrl(String downloadUrl) {
       this.downloadUrl = downloadUrl;
   }
   @Override
   public String toString() {
       return "Bean [versionCode=" + versionCode + ", versionName="
               + versionName + ", downloadUrl=" + downloadUrl + "]";
   }

}

UpdateTools.java

public class UpdateTools {
   /*
   * 用pull解析器解析服务器返回的xml文件 (xml封装了版本号)
   */
   public static Bean getUpdataInfo(InputStream is) throws Exception {
       XmlPullParser parser = Xml.newPullParser();
       parser.setInput(is, "utf-8");// 设置解析的数据源
       int type = parser.getEventType();
       Bean info = new Bean();// 实体
       while (type != XmlPullParser.END_DOCUMENT) {
           switch (type) {
           case XmlPullParser.START_TAG:
               if ("versionCode".equals(parser.getName())) {
                   info.setVersionCode(parser.nextText()); // 获取版本号
               } else if ("downloadUrl".equals(parser.getName())) {
                   info.setDownloadUrl(parser.nextText()); // 获取要升级的APK文件
               } else if ("updateLog".equals(parser.getName())) {
                   info.setUpdateLog(parser.nextText());// 获取该文件的信息
               }
               break;
           }
           type = parser.next();
       }
       return info;
   }

   /**
   *
   * 安装Apk
   *
   * @param file
   * @param context
   */
   public void installApk(File file,Context context) {
        Intent intent = new Intent();
        //执行动作
        intent.setAction(Intent.ACTION_VIEW);
        //执行的数据类型
        intent.setDataAndType(Uri.fromFile(file), "application/vnd.android.package-archive");
        context.startActivity(intent);
   }
}

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