Cleaned up DTMF code and click handling.

Min API version change was required for user interface lambdas.

build.gradle

@@ -90,7 +90,7 @@ android {
     compileSdkVersion 29
 
     defaultConfig {
-        minSdkVersion 21
+        minSdkVersion 24
         targetSdkVersion 29
         versionCode 42024
         versionName "2.10.3-beta"

src/main/java/eu/siacs/conversations/ui/RtpSessionActivity.java

@@ -57,6 +57,7 @@ import eu.siacs.conversations.entities.Contact;
 import eu.siacs.conversations.entities.Conversation;
 import eu.siacs.conversations.services.AppRTCAudioManager;
 import eu.siacs.conversations.services.XmppConnectionService;
+import eu.siacs.conversations.ui.widget.DialpadView;
 import eu.siacs.conversations.ui.util.AvatarWorkerTask;
 import eu.siacs.conversations.ui.util.MainThreadExecutor;
 import eu.siacs.conversations.ui.util.Rationals;
@@ -151,36 +152,16 @@ public class RtpSessionActivity extends XmppActivity implements XmppConnectionSe
         this.binding = DataBindingUtil.setContentView(this, R.layout.activity_rtp_session);
         setSupportActionBar(binding.toolbar);
 
-        //TODO: remove this - for testing dialpad input
+        binding.dialpad.setClickConsumer(tag -> {
-        //((DialpadView)findViewById(R.id.action_dialpad)).
+            requireRtpConnection().applyDtmfTone(tag);
-
+        });
-        findViewById(R.id.dialpad_1_holder).setOnClickListener(view -> dialpadPressed(view));
-        findViewById(R.id.dialpad_2_holder).setOnClickListener(view -> dialpadPressed(view));
-        findViewById(R.id.dialpad_3_holder).setOnClickListener(view -> dialpadPressed(view));
-        findViewById(R.id.dialpad_4_holder).setOnClickListener(view -> dialpadPressed(view));
-        findViewById(R.id.dialpad_5_holder).setOnClickListener(view -> dialpadPressed(view));
-        findViewById(R.id.dialpad_6_holder).setOnClickListener(view -> dialpadPressed(view));
-        findViewById(R.id.dialpad_7_holder).setOnClickListener(view -> dialpadPressed(view));
-        findViewById(R.id.dialpad_8_holder).setOnClickListener(view -> dialpadPressed(view));
-        findViewById(R.id.dialpad_9_holder).setOnClickListener(view -> dialpadPressed(view));
-        findViewById(R.id.dialpad_0_holder).setOnClickListener(view -> dialpadPressed(view));
-        findViewById(R.id.dialpad_asterisk_holder).setOnClickListener(view -> dialpadPressed(view));
-        findViewById(R.id.dialpad_pound_holder).setOnClickListener(view -> dialpadPressed(view));
 
         if (savedInstanceState != null) {
             int dialpad_visibility = savedInstanceState.getInt("dialpad_visibility");
-            System.out.println("dialpad_visibility onCreate = " + dialpad_visibility);
             findViewById(R.id.dialpad).setVisibility(dialpad_visibility);
         }
     }
 
-
-
-    private void dialpadPressed(View dialpadKeyHolderView) {
-        JingleRtpConnection rtpConnection = requireRtpConnection();
-        rtpConnection.applyDtmfTone(dialpadKeyHolderView.getTag().toString());
-    }
-
     @Override
     public boolean onCreateOptionsMenu(final Menu menu) {
         getMenuInflater().inflate(R.menu.activity_rtp_session, menu);

src/main/java/eu/siacs/conversations/ui/widget/DialpadView.java

@@ -23,10 +23,11 @@ import android.view.View;
 
 import androidx.constraintlayout.widget.ConstraintLayout;
 import eu.siacs.conversations.R;
-import eu.siacs.conversations.xmpp.jingle.JingleRtpConnection;
 
 public class DialpadView extends ConstraintLayout implements View.OnClickListener {
 
+    protected java.util.function.Consumer<String> clickConsumer = null;
+
     public DialpadView(Context context) {
         super(context);
         init();
@@ -42,6 +43,10 @@ public class DialpadView extends ConstraintLayout implements View.OnClickListene
         init();
     }
 
+    public void setClickConsumer(java.util.function.Consumer<String> clickConsumer) {
+        this.clickConsumer = clickConsumer;
+    }
+
     private void init() {
         inflate(getContext(), R.layout.dialpad, this);
         initViews();
@@ -64,10 +69,7 @@ public class DialpadView extends ConstraintLayout implements View.OnClickListene
 
     @Override
     public void onClick(View v) {
-        /* TODO: this widget doesn't know anything about the RTP Connection,
+        clickConsumer.accept(v.getTag().toString());
-            so how to make this widget generic but also able to send touch-tone sounds
-         */
-        System.out.println("v.getTag() = " + v.getTag());
     }
 
 }

src/main/java/eu/siacs/conversations/xmpp/jingle/JingleRtpConnection.java

@@ -232,17 +232,10 @@ public class JingleRtpConnection extends AbstractJingleConnection implements Web
         }
     }
 
-    //TODO: remove - hack to test dtmfSending
-    public DtmfSender getDtmfSender() {
-        return webRTCWrapper.getDtmfSender();
-    }
-
-    //FIXME: possible implementation
     public boolean applyDtmfTone(String tone) {
         return webRTCWrapper.applyDtmfTone(tone);
     }
 
-
     private void receiveSessionTerminate(final JinglePacket jinglePacket) {
         respondOk(jinglePacket);
         final JinglePacket.ReasonWrapper wrapper = jinglePacket.getReason();

src/main/java/eu/siacs/conversations/xmpp/jingle/WebRTCWrapper.java

@@ -530,11 +530,6 @@ public class WebRTCWrapper {
         return peerConnection;
     }
 
-    //TODO: remove - hack to test dtmfSending
-    public DtmfSender getDtmfSender() {
-        return peerConnection.getSenders().get(0).dtmf();
-    }
-
     public boolean applyDtmfTone(String tone) {
         if (toneManager == null || peerConnection.getSenders().isEmpty()) {
             return false;

src/main/res/layout/activity_rtp_session.xml

@@ -171,7 +171,7 @@
                     app:elevation="4dp"
                     app:fabCustomSize="72dp"
                     app:maxImageSize="36dp"
-                    tools:visibility="gone" />
+                    tools:visibility="visible" />
 
                 <com.google.android.material.floatingactionbutton.FloatingActionButton
                     android:id="@+id/accept_call"
@@ -186,7 +186,7 @@
                     app:elevation="4dp"
                     app:fabCustomSize="72dp"
                     app:maxImageSize="36dp"
-                    tools:visibility="gone" />
+                    tools:visibility="visible" />
 
             </RelativeLayout>
 
@@ -197,7 +197,7 @@
                 android:layout_centerVertical="true"
                 android:layout_margin="@dimen/in_call_fab_margin"
                 android:layout_toStartOf="@+id/end_call"
-                android:visibility="visible"
+                android:visibility="gone"
                 app:backgroundTint="?color_background_primary"
                 app:elevation="4dp"
                 app:fabSize="mini"
@@ -223,7 +223,7 @@
                 android:layout_centerVertical="true"
                 android:layout_margin="@dimen/in_call_fab_margin"
                 android:layout_toEndOf="@+id/end_call"
-                android:visibility="visible"
+                android:visibility="gone"
                 app:backgroundTint="?color_background_primary"
                 app:elevation="4dp"
                 app:fabSize="mini"
@@ -236,7 +236,7 @@
                 android:layout_centerVertical="true"
                 android:layout_margin="@dimen/in_call_fab_margin"
                 android:layout_toEndOf="@+id/in_call_action_right"
-                android:visibility="visible"
+                android:visibility="gone"
                 app:backgroundTint="?color_background_primary"
                 app:elevation="4dp"
                 app:fabSize="mini"