Detect network changes with Android > Lollipop (#5609)

3 files changed, 71 insertions, 1 deletions

diff --git a/core/src/main/java/de/danoeh/antennapod/core/service/download/DownloadService.java b/core/src/main/java/de/danoeh/antennapod/core/service/download/DownloadService.java
index 2da0c2db4..6cf6ce107 100644
--- a/core/src/main/java/de/danoeh/antennapod/core/service/download/DownloadService.java
+++ b/core/src/main/java/de/danoeh/antennapod/core/service/download/DownloadService.java
@@ -8,6 +8,7 @@ import android.content.Context;
 import android.content.Intent;
 import android.content.IntentFilter;
 import android.os.Binder;
+import android.os.Build;
 import android.os.Handler;
 import android.os.IBinder;
 import android.os.Looper;
@@ -39,6 +40,7 @@ import java.util.concurrent.TimeUnit;
 import java.util.concurrent.atomic.AtomicInteger;
 
 import de.danoeh.antennapod.core.event.DownloadEvent;
+import de.danoeh.antennapod.core.util.download.ConnectionStateMonitor;
 import de.danoeh.antennapod.event.FeedItemEvent;
 import de.danoeh.antennapod.model.feed.Feed;
 import de.danoeh.antennapod.model.feed.FeedItem;
@@ -120,7 +122,7 @@ public class DownloadService extends Service {
     private static final int SCHED_EX_POOL_SIZE = 1;
     private final ScheduledThreadPoolExecutor schedExecutor;
     private static DownloaderFactory downloaderFactory = new DefaultDownloaderFactory();
-
+    private ConnectionStateMonitor connectionMonitor;
     private final IBinder mBinder = new LocalBinder();
 
     private class LocalBinder extends Binder {
@@ -191,6 +193,11 @@ public class DownloadService extends Service {
         cancelDownloadReceiverFilter.addAction(ACTION_CANCEL_DOWNLOAD);
         registerReceiver(cancelDownloadReceiver, cancelDownloadReceiverFilter);
 
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
+            connectionMonitor = new ConnectionStateMonitor();
+            connectionMonitor.enable(getApplicationContext());
+        }
+
         downloadCompletionThread.start();
     }
 
@@ -225,6 +232,9 @@ public class DownloadService extends Service {
             downloadPostFuture.cancel(true);
         }
         unregisterReceiver(cancelDownloadReceiver);
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
+            connectionMonitor.disable(getApplicationContext());
+        }
 
         // start auto download in case anything new has shown up
         DBTasks.autodownloadUndownloadedItems(getApplicationContext());
diff --git a/core/src/main/java/de/danoeh/antennapod/core/util/NetworkUtils.java b/core/src/main/java/de/danoeh/antennapod/core/util/NetworkUtils.java
index 63b5db1f9..46c1e7f4d 100644
--- a/core/src/main/java/de/danoeh/antennapod/core/util/NetworkUtils.java
+++ b/core/src/main/java/de/danoeh/antennapod/core/util/NetworkUtils.java
@@ -18,6 +18,8 @@ import java.util.List;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
 
+import de.danoeh.antennapod.core.storage.DBTasks;
+import de.danoeh.antennapod.core.storage.DownloadRequester;
 import de.danoeh.antennapod.model.feed.FeedMedia;
 import de.danoeh.antennapod.core.preferences.UserPreferences;
 import de.danoeh.antennapod.core.service.download.AntennapodHttpClient;
@@ -227,4 +229,16 @@ public class NetworkUtils {
                 .observeOn(AndroidSchedulers.mainThread());
     }
 
+    public static void networkChangedDetected() {
+        if (NetworkUtils.isAutoDownloadAllowed()) {
+            Log.d(TAG, "auto-dl network available, starting auto-download");
+            DBTasks.autodownloadUndownloadedItems(context);
+        } else { // if new network is Wi-Fi, finish ongoing downloads,
+            // otherwise cancel all downloads
+            if (NetworkUtils.isNetworkRestricted()) {
+                Log.i(TAG, "Device is no longer connected to Wi-Fi. Cancelling ongoing downloads");
+                DownloadRequester.getInstance().cancelAllDownloads(context);
+            }
+        }
+    }
 }
diff --git a/core/src/main/java/de/danoeh/antennapod/core/util/download/ConnectionStateMonitor.java b/core/src/main/java/de/danoeh/antennapod/core/util/download/ConnectionStateMonitor.java
new file mode 100644
index 000000000..5c543bf5a
--- /dev/null
+++ b/core/src/main/java/de/danoeh/antennapod/core/util/download/ConnectionStateMonitor.java
@@ -0,0 +1,46 @@
+package de.danoeh.antennapod.core.util.download;
+
+import android.content.Context;
+import android.net.ConnectivityManager;
+import android.net.NetworkCapabilities;
+import android.net.NetworkRequest;
+import android.os.Build;
+import android.util.Log;
+
+import androidx.annotation.RequiresApi;
+import de.danoeh.antennapod.core.util.NetworkUtils;
+
+@RequiresApi(api = Build.VERSION_CODES.LOLLIPOP)
+public class ConnectionStateMonitor
+        extends ConnectivityManager.NetworkCallback
+        implements ConnectivityManager.OnNetworkActiveListener {
+    private static final String TAG = "ConnectionStateMonitor";
+    final NetworkRequest networkRequest;
+
+    public ConnectionStateMonitor() {
+        networkRequest = new NetworkRequest.Builder()
+                .addTransportType(NetworkCapabilities.TRANSPORT_CELLULAR)
+                .addTransportType(NetworkCapabilities.TRANSPORT_WIFI)
+                .build();
+    }
+
+    @Override
+    public void onNetworkActive() {
+        Log.d(TAG, "ConnectionStateMonitor::onNetworkActive network connection changed");
+        NetworkUtils.networkChangedDetected();
+    }
+
+    public void enable(Context context) {
+        ConnectivityManager connectivityManager =
+                (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
+        connectivityManager.registerNetworkCallback(networkRequest, this);
+        connectivityManager.addDefaultNetworkActiveListener(this);
+    }
+
+    public void disable(Context context) {
+        ConnectivityManager connectivityManager =
+                (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
+        connectivityManager.unregisterNetworkCallback(this);
+        connectivityManager.removeDefaultNetworkActiveListener(this);
+    }
+}
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