如何获得下载的状态？

本文介绍了如何获得下载的状态？的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

我使用的下载管理器获取下载的状态，但它仍然无法正常工作，它永远不会跳转到条件如果（c.moveToFirst（））键，我不知道为什么。可能有人帮助我，好吗？

私人最终的BroadcastReceiver myReceiver =新的BroadcastReceiver（）{         @覆盖         公共无效的onReceive（上下文的背景下，意图意图）{             串动= intent.getAction（）;             如果（Intent.ACTION_SCREEN_OFF.equals（动作））{                 下载管理器downloadMgr =（下载管理器）getSystemService（DOWNLOAD_SERVICE）;                 DownloadManager.Query查询=新DownloadManager.Query（）;                 query.setFilterByStatus(DownloadManager.STATUS_FAILED|DownloadManager.STATUS_PENDING|DownloadManager.STATUS_RUNNING|DownloadManager.STATUS_SUCCESSFUL);                 光标C = downloadMgr.query（查询）;                 如果（C == NULL）{                     //                 }                 其他 {                     如果（c.moveToFirst（））{                         INT参数：columnIndex = c.getColumnIndex（DownloadManager.COLUMN_STATUS）;                         INT状态= c.getInt（参数：columnIndex）;                         如果（状态== DownloadManager.STATUS_RUNNING）{                         //做一点事                         }                     }                 }             }         }     };

解决方案

下面是一些链接引用它。

• LINK1
• LINK2

样品code低于::

DownloadManager.Query查询= NULL;     光标C = NULL;     下载管理器下载管理器= NULL;     下载管理器=（下载管理器）getSystemService（Context.DOWNLOAD_SERVICE）;     查询=新DownloadManager.Query（）;      如果（查询！= NULL）{                 query.setFilterByStatus(DownloadManager.STATUS_FAILED|DownloadManager.STATUS_PAUSED|DownloadManager.STATUS_SUCCESSFUL|                         DownloadManager.STATUS_RUNNING | DownloadManager.STATUS_PENDING）;             } 其他 {                 返回;             }     C = downloadManager.query（查询）;     如果（c.moveToFirst（））{     INT状态= c.getInt（c.getColumnIndex（DownloadManager.COLUMN_STATUS））;     开关（状态）{     案例DownloadManager.STATUS_PAUSED：     打破;     案例DownloadManager.STATUS_PENDING：     打破;     案例DownloadManager.STATUS_RUNNING：     打破;     案例DownloadManager.STATUS_SUCCESSFUL：     打破;     案例DownloadManager.STATUS_FAILED：     打破;     } }

I use DownloadManager for getting status of downloading, but it still doesn't work, it never jumps to condition if(c.moveToFirst()) and I don't know why. Could anybody help me, please?

private final BroadcastReceiver myReceiver = new BroadcastReceiver() { @Override public void onReceive(Context context, Intent intent) { String action = intent.getAction(); if(Intent.ACTION_SCREEN_OFF.equals(action)) { DownloadManager downloadMgr = (DownloadManager)getSystemService(DOWNLOAD_SERVICE); DownloadManager.Query query = new DownloadManager.Query(); query.setFilterByStatus(DownloadManager.STATUS_FAILED|DownloadManager.STATUS_PENDING|DownloadManager.STATUS_RUNNING|DownloadManager.STATUS_SUCCESSFUL); Cursor c = downloadMgr.query(query); if(c==null) { // } else { if(c.moveToFirst()) { int columnIndex = c.getColumnIndex(DownloadManager.COLUMN_STATUS); int status = c.getInt(columnIndex); if(status == DownloadManager.STATUS_RUNNING){ //do something } } } } } };

解决方案

Here are few link refer it.

• LINK1
• LINK2

sample code is below::

DownloadManager.Query query = null; Cursor c = null; DownloadManager downloadManager = null; downloadManager = (DownloadManager)getSystemService(Context.DOWNLOAD_SERVICE); query = new DownloadManager.Query(); if(query!=null) { query.setFilterByStatus(DownloadManager.STATUS_FAILED|DownloadManager.STATUS_PAUSED|DownloadManager.STATUS_SUCCESSFUL| DownloadManager.STATUS_RUNNING|DownloadManager.STATUS_PENDING); } else { return; } c = downloadManager.query(query); if(c.moveToFirst()) { int status = c.getInt(c.getColumnIndex(DownloadManager.COLUMN_STATUS)); switch(status) { case DownloadManager.STATUS_PAUSED: break; case DownloadManager.STATUS_PENDING: break; case DownloadManager.STATUS_RUNNING: break; case DownloadManager.STATUS_SUCCESSFUL: break; case DownloadManager.STATUS_FAILED: break; } }