1.4 应用自动升级安装(下载和安装)

 

 /**

     * 下载APK的方法

     */

    public void showUpdateDialog(){

      AlertDialog.Builder  builder= new Builder( this);

      builder.setTitle( "更新版本:"+versionBean .getVersion());

      builder.setMessage( versionBean.getDescription());

      builder.setPositiveButton( "立刻升级", new OnClickListener() {

               public void onClick(DialogInterface dialog, int which) {

                        

                  

                   if(!!Environment. MEDIA_MOUNTED.equals(Environment. getExternalStorageState())){   //判断SD卡是否存在

                    

                     //升级下载

                     FinalHttp   http= new FinalHttp();

                     File file= new File(Environment.getExternalStorageDirectory(), "mobilesafe.apk");

                  

                     http.download(versionBean.getPath(),file.getAbsolutePath(), new  AjaxCallBack<File>(){

                        

                          @Override

                          public void onLoading( long count, long current) {

                        

                          tv_splash_progress.setTag( "下载进度:"+(current*100)/count);

                          super.onLoading(count, current);

                       

                        

                          }

                             

                            @Override

                            public void onSuccess(File t) {

                              

                            //下载完成时,安装SD卡中的 apk

                            installApk(t);

                              

                               super.onSuccess(t);

                              

                              

                            } 

                     

                  

                  });

                    

                  

                    

                     } else{

                           Toast. makeText(getApplicationContext(), "SD卡不可用...", 0).show();

                           loadMainUI();  //进入主界面

                     }

                        

                  }

            });

      

      

      builder.setNegativeButton( "下次再说",new OnClickListener() {

                  

                   @Override

                   public void onClick(DialogInterface dialog, int which) {

                        

                        loadMainUI();  //进入主界面

                  }

            } );

      builder.show();

      

    }

-----------------------------------------------------------------------------------------

 /**

     *

     * 安装 apk的方法

     */

    public void  installApk(File file){

      

       /*<action android:name="android.intent.action.VIEW" />

         <category android:name="android.intent.category.DEFAULT" />

         <data android:scheme="content" />

         <data android:scheme="file" />

         <data android:mimeType="application/vnd.android.package-archive" />

      */

      Intent intent=new Intent();

      intent.setAction( "android.intent.action.VIEW");

      intent.addCategory("android.intent.category.DEFAULT" );

      intent.setDataAndType(Uri. fromFile(file), "application/vnd.android.package-archive" );

      startActivity(intent);

      

    }