Android AppRTCDemo: Add slider for changing camera capture quality during call

webrtc/examples/androidapp/src/org/appspot/apprtc/CallFragment.java

 /*
  *  Copyright 2015 The WebRTC Project Authors. All rights reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
 package org.appspot.apprtc;
 
 import android.app.Activity;
 import android.app.Fragment;
 import android.os.Bundle;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
 import android.widget.ImageButton;
+import android.widget.SeekBar;
 import android.widget.TextView;
 
 import org.webrtc.RendererCommon.ScalingType;
 
 /**
  * Fragment for call control.
  */
 public class CallFragment extends Fragment {
   private View controlView;
   private TextView contactView;
   private ImageButton disconnectButton;
   private ImageButton cameraSwitchButton;
   private ImageButton videoScalingButton;
+  private TextView captureFormatText;
+  private SeekBar captureFormatSlider;
   private OnCallEvents callEvents;
   private ScalingType scalingType;
   private boolean videoCallEnabled = true;
 
   /**
    * Call control interface for container activity.
    */
   public interface OnCallEvents {
     public void onCallHangUp();
     public void onCameraSwitch();
     public void onVideoScalingSwitch(ScalingType scalingType);
+    public void onCaptureFormatChange(int width, int height, int framerate);
   }
 
   @Override
   public View onCreateView(LayoutInflater inflater, ViewGroup container,
       Bundle savedInstanceState) {
     controlView =
         inflater.inflate(R.layout.fragment_call, container, false);
 
     // Create UI controls.
     contactView =
         (TextView) controlView.findViewById(R.id.contact_name_call);
     disconnectButton =
         (ImageButton) controlView.findViewById(R.id.button_call_disconnect);
     cameraSwitchButton =
         (ImageButton) controlView.findViewById(R.id.button_call_switch_camera);
     videoScalingButton =
         (ImageButton) controlView.findViewById(R.id.button_call_scaling_mode);
+    captureFormatText =
+        (TextView) controlView.findViewById(R.id.capture_format_text_call);
+    captureFormatSlider =
+        (SeekBar) controlView.findViewById(R.id.capture_format_slider_call);
 
     // Add buttons click events.
     disconnectButton.setOnClickListener(new View.OnClickListener() {
       @Override
       public void onClick(View view) {
         callEvents.onCallHangUp();
       }
     });
 
     cameraSwitchButton.setOnClickListener(new View.OnClickListener() {
@@ skipping 20 matching lines @@
     });
     scalingType = ScalingType.SCALE_ASPECT_FILL;
 
     return controlView;
   }
 
   @Override
   public void onStart() {
     super.onStart();
 
+    boolean captureSliderEnabled = false;
     Bundle args = getArguments();
     if (args != null) {
       String contactName = args.getString(CallActivity.EXTRA_ROOMID);
       contactView.setText(contactName);
       videoCallEnabled = args.getBoolean(CallActivity.EXTRA_VIDEO_CALL, true);
+      captureSliderEnabled = videoCallEnabled
+          && args.getBoolean(CallActivity.EXTRA_VIDEO_CAPTUREQUALITYSLIDER_ENABLED, false);
     }
     if (!videoCallEnabled) {
       cameraSwitchButton.setVisibility(View.INVISIBLE);
     }
+    if (captureSliderEnabled) {
+      captureFormatSlider.setOnSeekBarChangeListener(
+          new CaptureQualityController(captureFormatText, callEvents));
+    } else {
+      captureFormatText.setVisibility(View.GONE);
+      captureFormatSlider.setVisibility(View.GONE);
+    }
   }
 
   @Override
   public void onAttach(Activity activity) {
     super.onAttach(activity);
     callEvents = (OnCallEvents) activity;
   }
 
 }