/**
* Posts the specified command to be executed on the main thread, waits for the request to
* complete, and returns the result.
*
* @see sendRequestAsync
*/
private Object sendRequest(int command, Object argument) {
if (Looper.myLooper() == mMainThreadHandler.getLooper()) {
throw new RuntimeException("This method will deadlock if called from the main thread.");
}
MainThreadRequest request = new MainThreadRequest(argument);
Message msg = mMainThreadHandler.obtainMessage(command, request);
msg.sendToTarget();
// Wait for the request to complete
synchronized (request) {
while (request.result == null) {
try {
request.wait();
} catch (InterruptedException e) {
// Do nothing, go back and wait until the request is complete
}
}
}
return request.result;
}
/**
* Asynchronous ("fire and forget") version of sendRequest(): Posts the specified command to be
* executed on the main thread, and returns immediately.
*
* @see sendRequest
*/
private void sendRequestAsync(int command) {
mMainThreadHandler.sendEmptyMessage(command);
}
