Do not list SIMs that are not ready.

Fixes #8426

src/org/thoughtcrime/securesms/util/ServiceUtil.java

@@ -6,8 +6,13 @@ import android.app.NotificationManager;
 import android.content.Context;
 import android.media.AudioManager;
 import android.net.ConnectivityManager;
+import android.os.Build;
 import android.os.PowerManager;
 import android.os.Vibrator;
+import android.support.annotation.NonNull;
+import android.support.annotation.RequiresApi;
+import android.support.v4.content.ContextCompat;
+import android.telephony.SubscriptionManager;
 import android.telephony.TelephonyManager;
 import android.view.WindowManager;
 import android.view.inputmethod.InputMethodManager;
@@ -48,4 +53,9 @@ public class ServiceUtil {
   public static Vibrator getVibrator(Context context) {
     return  (Vibrator)context.getSystemService(Context.VIBRATOR_SERVICE);
   }
+
+  @RequiresApi(api = Build.VERSION_CODES.LOLLIPOP_MR1)
+  public static SubscriptionManager getSubscriptionManager(@NonNull Context context) {
+    return ContextCompat.getSystemService(context, SubscriptionManager.class);
+  }
 }

src/org/thoughtcrime/securesms/util/dualsim/SubscriptionManagerCompat.java

@@ -3,15 +3,18 @@ package org.thoughtcrime.securesms.util.dualsim;
 import android.content.Context;
 import android.os.Build;
 import android.support.annotation.NonNull;
+import android.support.annotation.RequiresApi;
 import android.telephony.SubscriptionInfo;
 import android.telephony.SubscriptionManager;
+import android.telephony.TelephonyManager;
 
+import org.thoughtcrime.securesms.util.ServiceUtil;
 import org.whispersystems.libsignal.util.guava.Optional;
 
 import java.util.LinkedList;
 import java.util.List;
 
-public class SubscriptionManagerCompat {
+public final class SubscriptionManagerCompat {
 
   private final Context context;
 
@@ -32,7 +35,7 @@ public class SubscriptionManagerCompat {
       return Optional.absent();
     }
 
-    SubscriptionInfo subscriptionInfo = SubscriptionManager.from(context).getActiveSubscriptionInfo(subscriptionId);
+    SubscriptionInfo subscriptionInfo = getSubscriptionManager().getActiveSubscriptionInfo(subscriptionId);
 
     if (subscriptionInfo != null) {
       return Optional.of(new SubscriptionInfoCompat(subscriptionId, subscriptionInfo.getDisplayName(),
@@ -47,7 +50,7 @@ public class SubscriptionManagerCompat {
       return new LinkedList<>();
     }
 
-    List<SubscriptionInfo> subscriptionInfos = SubscriptionManager.from(context).getActiveSubscriptionInfoList();
+    List<SubscriptionInfo> subscriptionInfos = getSubscriptionManager().getActiveSubscriptionInfoList();
 
     if (subscriptionInfos == null || subscriptionInfos.isEmpty()) {
       return new LinkedList<>();
@@ -56,13 +59,29 @@ public class SubscriptionManagerCompat {
     List<SubscriptionInfoCompat> compatList = new LinkedList<>();
 
     for (SubscriptionInfo subscriptionInfo : subscriptionInfos) {
-      compatList.add(new SubscriptionInfoCompat(subscriptionInfo.getSubscriptionId(),
-                                                subscriptionInfo.getDisplayName(),
-                                                subscriptionInfo.getMcc(),
-                                                subscriptionInfo.getMnc()));
+      if (isReady(subscriptionInfo)) {
+        compatList.add(new SubscriptionInfoCompat(subscriptionInfo.getSubscriptionId(),
+                                                  subscriptionInfo.getDisplayName(),
+                                                  subscriptionInfo.getMcc(),
+                                                  subscriptionInfo.getMnc()));
+      }
     }
 
     return compatList;
   }
 
+  @RequiresApi(api = Build.VERSION_CODES.LOLLIPOP_MR1)
+  private SubscriptionManager getSubscriptionManager() {
+    return ServiceUtil.getSubscriptionManager(context);
+  }
+
+  private boolean isReady(@NonNull SubscriptionInfo subscriptionInfo) {
+    if (Build.VERSION.SDK_INT < Build.VERSION_CODES.N) return true;
+
+    TelephonyManager telephonyManager = ServiceUtil.getTelephonyManager(context);
+
+    TelephonyManager specificTelephonyManager = telephonyManager.createForSubscriptionId(subscriptionInfo.getSubscriptionId());
+
+    return specificTelephonyManager.getSimState() == TelephonyManager.SIM_STATE_READY;
+  }
 }