add BT permissions requests

xwords4/android/app/src/main/java/org/eehouse/android/xw4/ConnViaViewLayout.java

@@ -41,7 +41,7 @@ public class ConnViaViewLayout extends LinearLayout {
     private static final String TAG = ConnViaViewLayout.class.getSimpleName();
     private CommsConnTypeSet m_curSet;
     private DlgDelegate.HasDlgDelegate m_dlgDlgt;
-    private Activity m_activity;
+    private DelegateBase mParent;
 
     public interface CheckEnabledWarner {
         public void warnDisabled( CommsConnType typ );
@@ -57,9 +57,7 @@ public class ConnViaViewLayout extends LinearLayout {
         super( context, as );
     }
 
-    public void setActivity( Activity activity ) { m_activity = activity; }
+    protected void configure( DelegateBase parent, CommsConnTypeSet types,
-
-    protected void configure( CommsConnTypeSet types,
                               CheckEnabledWarner cew,
                               SetEmptyWarner sew,
                               DlgDelegate.HasDlgDelegate dlgDlgt )
@@ -71,6 +69,7 @@ public class ConnViaViewLayout extends LinearLayout {
         m_disabledWarner = cew;
         m_emptyWarner = sew;
         m_dlgDlgt = dlgDlgt;
+        mParent = parent;
     }
 
     protected CommsConnTypeSet getTypes()
@@ -83,7 +82,7 @@ public class ConnViaViewLayout extends LinearLayout {
         LinearLayout list = (LinearLayout)findViewById( R.id.conn_types );
         list.removeAllViews();  // in case being reused
 
-        Context context = getContext();
+        final Context context = getContext();
         List<CommsConnType> supported = CommsConnTypeSet.getSupported( context );
 
         for ( CommsConnType typ : supported ) {
@@ -101,9 +100,13 @@ public class ConnViaViewLayout extends LinearLayout {
                     public void onCheckedChanged( CompoundButton buttonView,
                                                   boolean isChecked ) {
                         if ( isChecked ) {
-                            showNotAgainTypeTip( typf );
+                            if ( disableUntil( context, typ ) ) {
-                            enabledElseWarn( typf );
+                                buttonView.setChecked( false );
-                            m_curSet.add( typf );
+                            } else {
+                                showNotAgainTypeTip( typf );
+                                enabledElseWarn( typf );
+                                m_curSet.add( typf );
+                            }
                         } else {
                             m_curSet.remove( typf );
                             if ( null != m_emptyWarner && 0 == m_curSet.size()) {
@@ -115,6 +118,21 @@ public class ConnViaViewLayout extends LinearLayout {
         }
     }
 
+    private boolean disableUntil( Context context, CommsConnType typ )
+    {
+        boolean disable = false;
+        if ( typ == CommsConnType.COMMS_CONN_BT
+             && ! BTUtils.havePermissions( context ) ) {
+            if ( null != mParent ) {
+                Perms23.tryGetPerms( mParent, BTUtils.BTPerms,
+                                     R.string.nearbydev_rationale,
+                                     Action.SKIP_CALLBACK );
+            }
+            disable = true;
+        }
+        return disable;
+    }
+
     private void enabledElseWarn( CommsConnType typ )
     {
         boolean enabled = true;

xwords4/android/app/src/main/java/org/eehouse/android/xw4/GameConfigDelegate.java

@@ -258,9 +258,8 @@ public class GameConfigDelegate extends DelegateBase
             LinearLayout layout = (LinearLayout)inflate( R.layout.conn_types_display );
             final ConnViaViewLayout items = (ConnViaViewLayout)
                 layout.findViewById( R.id.conn_types );
-            items.setActivity( m_activity );
 
-            items.configure( conTypes,
+            items.configure( this, conTypes,
                              new ConnViaViewLayout.CheckEnabledWarner() {
                                  public void warnDisabled( CommsConnType typ ) {
                                      switch( typ ) {

xwords4/android/app/src/main/java/org/eehouse/android/xw4/XWActivity.java

@@ -320,6 +320,8 @@ public class XWActivity extends FragmentActivity
         return m_dlgt.makeDialog( alert, params );
     }
 
+    protected DelegateBase getDelegate() { return m_dlgt; }
+
     ////////////////////////////////////////////////////////////
     // DlgClickNotify interface
     ////////////////////////////////////////////////////////////

xwords4/android/app/src/main/java/org/eehouse/android/xw4/XWConnAddrPreference.java

@@ -68,7 +68,7 @@ public class XWConnAddrPreference extends DialogPreference
             View view = LocUtils.inflate( activity, R.layout.conn_types_display );
 
             final ConnViaViewLayout cvl = (ConnViaViewLayout)view.findViewById( R.id.conn_types );
-            cvl.configure( XWPrefs.getAddrTypes( activity ),
+            cvl.configure( activity.getDelegate(), XWPrefs.getAddrTypes( activity ),
                           new ConnViaViewLayout.CheckEnabledWarner() {
                               @Override
                               public void warnDisabled( CommsConnType typ ) {

xwords4/android/app/src/main/java/org/eehouse/android/xw4/XWPrefs.java

@@ -462,6 +462,9 @@ public class XWPrefs {
         if ( 0 == result.size() ) {
             result.add( CommsConnType.COMMS_CONN_MQTT );
         }
+        if ( !BTUtils.havePermissions( context ) ) {
+            result.remove( CommsConnType.COMMS_CONN_BT );
+        }
         if ( originalHash != result.hashCode() ) {
             setAddrTypes( context, result );
         }

xwords4/android/app/src/main/res/values/strings.xml

@@ -2395,6 +2395,8 @@
     permission, but only the phone number of the sender will be
     displayed.
     </string>
+    <string name="nearbydev_rationale">CrossWords needs permission to
+    discover nearby devices in order to use Bluetooth.</string>
     <string name="move_dict_rationale">Storing a wordlist in the
     Downloads area requires Storage permission.</string>
     <string name="remove_sms">Remove SMS</string>