在我的主要活动中我有
public async void DoSomethingAsync()
{
//implementation
}
然后在下面我有方法
if (isNetworkAvailable() == true) {
Log.i("testing", "available");
} else {
Log.i("test", "unaivalibale");
}
我也设置了
private boolean isNetworkAvailable() {
ConnectivityManager connectivityManager
= (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo activeNetworkInfo = connectivityManager.getActiveNetworkInfo();
return activeNetworkInfo != null && activeNetworkInfo.isConnected();
}
在清单中,当我运行应用程序时,它总是停止,杀死应用程序出错了
答案 0 :(得分:1)
创建一个类并正确添加方法:
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,在您使用的活动中:
if(!ConnectivityStatus.isConnected(your_class_name.this)){
//not connected
}else {
//connected
}
答案 1 :(得分:0)
/*********************************************************
* 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;
}
}