Volley
線程中使用while(true)實現(xiàn)循環(huán)眶根，處理隊列中的request
NetworkDispatcher.class
@Override
public void run() {
Process.setThreadPriority(Process.THREAD_PRIORITY_BACKGROUND);
while (true) {
try {
processRequest();
} catch (InterruptedException e) {
// We may have been interrupted because it was time to quit.
if (mQuit) {
Thread.currentThread().interrupt();
return;
}
VolleyLog.e(
"Ignoring spurious interrupt of NetworkDispatcher thread; "
+ "use quit() to terminate it");
}
}
}
Looper
線程中使用for (;;)實現(xiàn)循環(huán)边琉，處理隊列中的Message
Looper.class
/**
* Run the message queue in this thread. Be sure to call
* {@link #quit()} to end the loop.
*/
public static void loop() {
...
final MessageQueue queue = me.mQueue;
...
for (;;) {
Message msg = queue.next(); // might block
if (msg == null) {
// No message indicates that the message queue is quitting.
return;
}
...
try {
msg.target.dispatchMessage(msg);
} finally {
if (traceTag != 0) {
Trace.traceEnd(traceTag);
}
}
...
msg.recycleUnchecked();
}
}
