[英]Broadcast receiver and memory leaks
在我的應用中; 我想在所有服務中接收網絡連接更改,因為我必須同時在本地和服務器上管理數據庫。
我已經制作了BaseConnectivityService
,它具有如下接收器,用於進行連接更改:
public abstract class BaseConnectivityService extends IntentService {
private ConnectivityManager mConnectivityManager;
public BaseConnectivityService(String name) {
super(name);
}
@Override
public void onCreate() {
super.onCreate();
mConnectivityManager = (ConnectivityManager) getSystemService(CONNECTIVITY_SERVICE);
registerReceivers();
}
@Override
public void onDestroy() {
unregisterReceivers();
mConnectivityManager = null;
super.onDestroy();
}
private void registerReceivers() {
IntentFilter connectivityIntentFilter = new IntentFilter(ConnectivityManager.CONNECTIVITY_ACTION);
registerReceiver(mConnectivityChangeReceiver, connectivityIntentFilter);
}
private void unregisterReceivers() {
unregisterReceiver(mConnectivityChangeReceiver);
}
/**
* will be invoked when network connectivity has been changed and network is in connected state
*/
protected abstract void onNetworkConnected();
/**
* will be invoked when network connectivity has been changed and network is NOT in connected state
*/
protected abstract void onNetworkDisconnected();
/**
* checks whether network is available and is in connected state
*
* @return true if network is connected; false otherwise
*/
protected final boolean isNetworkConnected() {
NetworkInfo activeNetworkInfo = mConnectivityManager.getActiveNetworkInfo();
return activeNetworkInfo != null && activeNetworkInfo.isAvailable() && activeNetworkInfo.isConnected();
}
private final BroadcastReceiver mConnectivityChangeReceiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
if (isNetworkConnected()) {
onNetworkConnected();
} else {
onNetworkDisconnected();
}
}
};
}
現在,如果我使用BaseConnectivityService
擴展所有服務; 它會導致內存泄漏,因為該系統會將服務保留在內存中以通知連接更改嗎?
我已經閱讀了這個主題 ; 這有點類似的問題。 正如馬克·墨菲(Mark Murphy)在那寫的那樣:
您將泄漏內存,因為BroadcastReceiver會將組件保留在RAM中(即使它已銷毀),直到Android終止進程為止。
它適用於我的情況嗎? 如果是,那么什么是避免內存泄漏並獲得網絡連接更改通知的好的解決方案?
查看同一線程中的最后一個響應。 您可以從Service類注冊和注銷廣播接收器。 如果它與服務生命周期綁定在一起,則沒有泄漏的機會。
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