我正在尝试拨打警报框。当我致电api时，它将检查互联网连接是否可用。如果建立连接，则没有警报框。如果连接未建立，则将显示警告框。当我调用post方法时，它显示错误。我也尝试过使用片段，但无法正常工作。
这是网络类
import android.content.Context;
import android.net.ConnectivityManager;
public class NetworkConnection {
private Context mContext;
public NetworkConnection(Context context){
this.mContext = context;
}
public boolean isConnectingToInternet(){
ConnectivityManager cm = (ConnectivityManager)mContext.getSystemService(Context.CONNECTIVITY_SERVICE);
if(cm.getActiveNetworkInfo() != null && cm.getActiveNetworkInfo().isConnected() == true)
{
return true;
}
return false;
}
}
这是实用程序类
public class Utility extends Activity {
public static Request post(HashMap<String, String> keys, String api_name, Activity activity) {
NetworkConnection mConnectionDetector;
mConnectionDetector = new NetworkConnection(activity.getApplicationContext());
Request request = null;
Log.e("Connection Test:", mConnectionDetector.toString());
if (mConnectionDetector.isConnectingToInternet() == false) {
new AlertDialog.Builder(activity.getApplicationContext())
.setTitle("Nuke planet Jupiter?")
.setMessage("Note that nuking planet Jupiter will destroy everything in there.")
/*.setPositiveButton("Nuke", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
Log.d("MainActivity", "Sending atomic bombs to Jupiter");
}
})
.setNegativeButton("Abort", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
Log.d("MainActivity", "Aborting mission...");
}
}) */
.show();
} else {
StrictMode.ThreadPolicy policy =
new StrictMode.ThreadPolicy.Builder().permitAll().build();
StrictMode.setThreadPolicy(policy);
FormBody.Builder body = new FormBody.Builder();
for (Object key : keys.keySet()) {
String value = (String) keys.get(key);
body.add(key.toString(), value);
}
if (getlanguagetype(activity) != null || !TextUtils.isEmpty(Utility.getlanguagetype(activity)))
body.add("lang", getlanguagetype(activity));
else
body.add("lang", "en");
RequestBody parmetrs = body.build();
if (api_name.equalsIgnoreCase(Apiconfig.settings + "en") || api_name.equalsIgnoreCase(Apiconfig.settings + "ar")) {
request = new Request.Builder()
.url(api_name)
.addHeader("Content-Type", "application/json")
.addHeader("Authorization", "Bearer " + getusertoken(activity))
.get()
.build();
} else {
request = new Request.Builder()
.url(api_name)
.addHeader("Content-Type", "application/json")
.addHeader("Authorization", "Bearer " + getusertoken(activity))
.post(parmetrs)
.build();
}
}
return request;
}