for (int val : myArray) {
URL.openConnection();
}Opening and closing internet connection continuously is extremely battery-inefficient since HTTP exchange is the most consuming operation of the network. This bug typically occurs when one obtain a new HttpURLConnection by calling URL#openConnection() within a loop control structure (while, for, do-while, for-each).
Also, this bad practice must be early prevented because it is the root of another evil that consists in polling data at regular intervals, instead of using push notifications to save a lot of battery power.
for (int val : myArray) {
URL.openConnection();
}