如何获得下载的状态？ [英] How to get status of downloading?

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; 
    }
}

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