如何在Android的Java类中处理Internet连接
如果我的互联网连接不好或者我的连接断了,我不能在java类中处理它, 在活动中,我可以检查互联网连接,但这里没有, 所以我在跟踪的同时还要处理互联网连接如何在Android的Java类中处理Internet连接,android,tracking,internet-connection,Android,Tracking,Internet Connection,如果我的互联网连接不好或者我的连接断了,我不能在java类中处理它, 在活动中,我可以检查互联网连接,但这里没有, 所以我在跟踪的同时还要处理互联网连接 @Override public void onLocationChanged(Location location) { sharedPreferences = mContext.getSharedPreferences(PREFS_NAME, 0); editor = sharedPreferences.edit();
@Override
public void onLocationChanged(Location location) {
sharedPreferences = mContext.getSharedPreferences(PREFS_NAME, 0);
editor = sharedPreferences.edit();
emailSharedPref = sharedPreferences.getString("email", "");
Log.e("emailLocation", emailSharedPref);
Log.i("long", "" + location.getLongitude() + " TIME: " + t.time());
getAdress(location.getLatitude(),location.getLongitude());
JSONObject jsonObject = new JSONObject();
URLPath urlPath = new URLPath();
String serverURL = urlPath.trackEmployee;
WebServiceRequest request = new WebServiceRequest();
request.setUrl(serverURL);
try {
jsonObject.put("latitude", location.getLatitude());
jsonObject.put("longitude", location.getLongitude());
jsonObject.put("street", street);
jsonObject.put("district", district);
jsonObject.put("city", city);
jsonObject.put("time", t.time());
jsonObject.put("date", t.date());
jsonObject.put("email", sharedPreferences.getString("email", ""));
Log.e("jsonLocation", jsonObject.toString());
} catch (JSONException e)
{
e.printStackTrace();
}
request.setRequestBody(jsonObject);
WebServiceAsyncTask webService = new WebServiceAsyncTask();
WebServiceRequest[] requestArr = {request};
webService.execute(requestArr);
}
public void getAdress(double longt, double lat) {
try {
addresses = geocoder.getFromLocation(longt, lat, 1);
} catch (IOException e) {
e.printStackTrace();
}
if (addresses != null) {
street = addresses.get(0).getAddressLine(0);
district = addresses.get(0).getAddressLine(1);
city = addresses.get(0).getAddressLine(2);
connection="on";
Log.d("connection",connection+".."+addresses.toString());
}else{
connection="off";
Log.d("connection",connection);
}
}
您可以使用ConnectionManager注册BroadcastReceiver,并执行操作ConnectionManager.CONNECTIVITY\u操作。如果连接发生变化,将发送广播事件。在onReceive方法中,您可以更新标志,并在方法中建立任何连接之前使用这些标志进行检查
例如
一种检查是否存在网络连接的简单方法
你可以在你想传递有效应用程序上下文的地方使用它
/**
* check for network connection
*/
public static boolean isOnline(Context context) {
ConnectivityManager connectivityManager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo activeNetworkInfo = connectivityManager.getActiveNetworkInfo();
return activeNetworkInfo != null && activeNetworkInfo.isConnected();
}
注意:这不会解决您查询的网络资源的可达性问题
我建议在AsyncTask中使用HttpURLConnection,并尝试处理SocketTimeoutException以避免数据连接不良的问题
正如@tyler sebastian提出的:
Handler mHandler;
public void useHandler() {
mHandler = new Handler();
mHandler.postDelayed(mRunnable, 1000);
}
private Runnable mRunnable = new Runnable() {
@Override
public void run() {
Log.e("Handlers", "Calls");
/** Do something **/
mHandler.postDelayed(mRunnable, 1000);
}
};
如何从处理程序中删除挂起的执行
mHandler.removeCallbacksmrunable;
如何重新安排
mHandler.PostDelayedRunnable,1000;
Runnable在UI线程下工作,所以您可以在相应的Runnable中更新UserInterface
然后可以使用View.sendPostD
您应该编写一个runnable,以便每30秒运行或检查一次连接性我应该传入此函数的参数是什么?此class.java不是活动帮助:D@AyaRadwan-活动ActivityName.this、片段getActivity等中的任何上下文
Handler mHandler;
public void useHandler() {
mHandler = new Handler();
mHandler.postDelayed(mRunnable, 1000);
}
private Runnable mRunnable = new Runnable() {
@Override
public void run() {
Log.e("Handlers", "Calls");
/** Do something **/
mHandler.postDelayed(mRunnable, 1000);
}
};