在Android中，检查可用的Internet连接频繁？ [英] In Android To Check the Internet Connection is Available for Frequently?

问题描述

海我的应用程序保存（到服务器）数据通过NetConnection。如果净是不可用我保存在本地，然后当电网重新可用发送到服务器。我的问题是检查 Internet连接Frequetly 。所以我尝试了服务功能，用于检查网络连接。但是，所谓的只有一次。如何解决我的问题。有人好心帮我 在此先感谢！

更新

 包com.android.cdtech;

进口android.app.Activity;
进口android.content.BroadcastReceiver;
进口android.content.Context;
进口android.content.Intent;
进口android.database.Cursor;
进口android.net.ConnectivityManager;
进口android.view.View;

类ReceiverName延伸活动{
    BroadcastReceiver的R =新的BroadcastReceiver（）{

    @覆盖
    公共无效的onReceive（上下文的背景下，意图意图）{
        ConnectivityManager厘米=（（ConnectivityManager）context.getSystemService（Context.CONNECTIVITY_SERVICE））;
        如果（厘米== NULL）
            返回;
        如果（cm.getActiveNetworkInfo（）=空＆安培;！＆安培; cm.getActiveNetworkInfo（）isConnected（））{
            保存数据（）;
        } 其他 {
            //什么都不做或以某种方式通知用户
        }

    }
    // code处理broadcase

    私人无效SAVEDATA（）{
        最后SAVEDATA DH =新SAVEDATA（本）; //创建数据库类
        WebService的calService =新的WebService（）;
        dh.open（）;
        光标C = dh.pay（）;

        字符串文本=;
        做 {
            文=文++\ N+ c.getString（4）;
            的System.out.println（c.getCount（））;
            // Toast.makeText（此，名称：+ c.getString（1）+ c.getString（2）+ c.getString（3）+ c.getString（4）+，Toast.LENGTH_LONG）.show （）;
            calService.paymentReceipt（PaymentReceipt，c.getString（1），c.getString（2），c.getString（3），c.getString（4），克力，0）;
         }
         而（c.moveToNext（））;
         dh.close（）;
        }
    };
}
 

解决方案

您可以不用任何计时器，只登记接收器监听连接更改：

 ＆LT;接收机器人：名称=。ReceiverName＆GT;
    ＆LT;意向滤光器＆gt;
        ＆lt;作用机器人：名称=android.net.wifi.STATE_CHANGE/＆GT;
        ＆lt;作用机器人：名称=android.net.conn.CONNECTIVITY_CHANGE/＆GT;
    ＆所述; /意图滤光器＆gt;
＆LT; /接收器＆GT;
 

，并检查是否建立连接：

 公共类ReceiverName扩展的BroadcastReceiver {
    @覆盖
    公共无效的onReceive（上下文的背景下，意图意图）{
        ConnectivityManager厘米=（（ConnectivityManager）context.getSystemService（Context.CONNECTIVITY_SERVICE））;
        如果（厘米== NULL）
            返回;
        如果（cm.getActiveNetworkInfo（）=空＆安培;！＆安培; cm.getActiveNetworkInfo（）isConnected（））{
            //发送这里
        } 其他 {
            //什么都不做或以某种方式通知用户
        }

    }
}
 

Hai my Application is to Save (to Server) the Data through NetConnection. If net is not Available i saved Locally, and then when net is available again send to the server. My problem is to check Internet Connection Frequetly.So i tried the Service function for checking the Net connection. But it called once only. How to solve my Problem. Anybody kindly help me Thanks in advance!

update

package com.android.cdtech;

import android.app.Activity;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.database.Cursor;
import android.net.ConnectivityManager;
import android.view.View;

class ReceiverName extends Activity {
    BroadcastReceiver r = new BroadcastReceiver(){

    @Override
    public void onReceive(Context context, Intent intent) {
        ConnectivityManager cm = ((ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE));
        if (cm == null)
            return;
        if (cm.getActiveNetworkInfo() != null && cm.getActiveNetworkInfo().isConnected()) {
            saveData();
        } else {
            // Do nothing or notify user somehow
        }

    }
    // code to handle broadcase

    private void saveData() {
        final saveData dh=new saveData(this); //Class for Creating a Database
        webService calService=new  webService();
        dh.open();
        Cursor c = dh.pay();

        String text = "";
        do {
            text = text + " " + "\n" + c.getString(4);
            System.out.println(c.getCount());
            // Toast.makeText(this,"Name:" +c.getString(1)+c.getString(2)+c.getString(3)+c.getString(4)+"",Toast.LENGTH_LONG).show();
            calService.paymentReceipt("PaymentReceipt", c.getString(1), c.getString(2), c.getString(3), c.getString(4), "gf", "0");
         }
         while (c.moveToNext()); 
         dh.close();
        }
    };
}

解决方案

You can do it without any timers, just register receiver for listening connection changes:

<receiver android:name=".ReceiverName" >
    <intent-filter >
        <action android:name="android.net.wifi.STATE_CHANGE" />
        <action android:name="android.net.conn.CONNECTIVITY_CHANGE" />
    </intent-filter>
</receiver>

And check if connection established:

public class ReceiverName extends BroadcastReceiver {
    @Override
    public void onReceive(Context context, Intent intent) {
        ConnectivityManager cm = ((ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE));
        if (cm == null)
            return;
        if (cm.getActiveNetworkInfo() != null && cm.getActiveNetworkInfo().isConnected()) {
            // Send here
        } else {
            // Do nothing or notify user somehow
        }

    }
}

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