質問: locationlistenerを使って位置情報を取得しています。 ただonLocationChangedメソッドが呼ばれるのが遅く、端末によっては20~30秒ほどかかります。 これをもっと精度は低くてもいいのですがもっと早く取る方法は何かないでしょうか? バージョンはAndroid4.4以上を対応しないといけないです。
回答: 少しでも早く位置情報を取得したい場合は (1)複数のProvider(GPSとネットワーク)を登録しておく。 (2)getLastKnownLocation()を使う。 などの方法がございます。 http://ria10.hatenablog.com/entry/20121109/1352470160 にサンプルコードなども書かれているのでご参考にされては いかがでしょうか? private static final int TWO_MINUTES = 1000 * 60 * 2; /** Determines whether one Location reading is better than the current Location fix * @param location The new Location that you want to evaluate * @param currentBestLocation The current Location fix, to which you want to compare the new one */ protected boolean isBetterLocation(Location location, Location currentBestLocation) { if (currentBestLocation == null) { // A new location is always better than no location return true; } // Check whether the new location fix is newer or older long timeDelta = location.getTime() - currentBestLocation.getTime(); boolean isSignificantlyNewer = timeDelta > TWO_MINUTES; boolean isSignificantlyOlder = timeDelta < -TWO_MINUTES; boolean isNewer = timeDelta > 0; // If it's been more than two minutes since the current location, use the new location // because the user has likely moved if (isSignificantlyNewer) { return true; // If the new location is more than two minutes older, it must be worse } else if (isSignificantlyOlder) { return false; } // Check whether the new location fix is more or less accurate int accuracyDelta = (int) (location.getAccuracy() - currentBestLocation.getAccuracy()); boolean isLessAccurate = accuracyDelta > 0; boolean isMoreAccurate = accuracyDelta < 0; boolean isSignificantlyLessAccurate = accuracyDelta > 200; // Check if the old and new location are from the same provider boolean isFromSameProvider = isSameProvider(location.getProvider(), currentBestLocation.getProvider()); // Determine location quality using a combination of timeliness and accuracy if (isMoreAccurate) { return true; } else if (isNewer && !isLessAccurate) { return true; } else if (isNewer && !isSignificantlyLessAccurate && isFromSameProvider) { return true; } return false; } /** Checks whether two providers are the same */ private boolean isSameProvider(String provider1, String provider2) { if (provider1 == null) { return provider2 == null; } return provider1.equals(provider2); }