检查用户是否连接到机器人
问题描述:
网络以我主要活动我有检查用户是否连接到机器人
if (isNetworkAvailable() == true) {
Log.i("testing", "available");
} else {
Log.i("test", "unaivalibale");
}
然后下面我有作为
private boolean isNetworkAvailable() {
ConnectivityManager connectivityManager
= (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo activeNetworkInfo = connectivityManager.getActiveNetworkInfo();
return activeNetworkInfo != null && activeNetworkInfo.isConnected();
}
我还设置
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
该方法
在清单中,但是当我运行该应用程序时,它总是停止,导致应用程序出现问题
答
做一个类,并适当加方法:
public class ConnectivityStatus extends ContextWrapper{
public ConnectivityStatus(Context base) {
super(base);
}
public static boolean isConnected(Context context){
ConnectivityManager manager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo connection = manager.getActiveNetworkInfo();
if (connection != null && connection.isConnectedOrConnecting()){
return true;
}
return false;
}
}
获取状态,在活动,您使用如:
if(!ConnectivityStatus.isConnected(your_class_name.this)){
//not connected
}else {
//connected
}
答
/*********************************************************
* NetworkStatus helps us to check the Internet connection
* state of our handheld device.**************************
********************************************************/
package com.mynetwork.network;
import android.content.Context;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.util.Log;
import android.widget.Toast;
/**
* @author Aashutosh
*
*/
public class NetworkStatus {
private static NetworkStatus instance = new NetworkStatus();
static Context context;
ConnectivityManager connectivityManager;
NetworkInfo wifiInfo, mobileInfo;
boolean connected = false;
public static NetworkStatus getInstance(Context ctx) {
context = ctx;
return instance;
}
public boolean isOnline(Context con) {
try {
connectivityManager = (ConnectivityManager) con.getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo networkInfo = connectivityManager.getActiveNetworkInfo();
connected = networkInfo != null && networkInfo.isAvailable() && networkInfo.isConnected();
return connected;
} catch (Exception e) {
e.printStackTrace();
Toast.makeText(context,"Check Connectivity Exception: " + e.getMessage(), Toast.LENGTH_SHORT).show();
Log.v("connectivity", e.toString());
}
return connected;
}
/**
* Checking for all possible Internet providers
**/
public boolean isConnectedToInternet(){
connectivityManager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
if (connectivityManager != null){
NetworkInfo[] info = connectivityManager.getAllNetworkInfo();
if (info != null){
for (int i = 0; i < info.length; i++){
if (info[i].getState() == NetworkInfo.State.CONNECTED){
return true;
}
}
}
}
return false;
}
}
显示logcat的输出。 –
错误是由“Context”引起的,请参阅我的解决方案以进行适当的验证。 – W4R10CK
[如何检查Android上的互联网访问? InetAddress永不超时](http://*.com/questions/1560788/how-to-check-internet-access-on-android-inetaddress-never-times-out) – Soham