AppRTCDemo(android): added a Heads-Up Display for bandwidth estimation.

- tap display to toggle visibility
- increased getStats frequency to 1hz.

R=glaznev@google.com

Review URL: https://webrtc-codereview.appspot.com/19419004

git-svn-id: http://webrtc.googlecode.com/svn/trunk@6039 4adac7df-926f-26a2-2b94-8c16560cd09d

talk/examples/android/src/org/appspot/apprtc/AppRTCDemoActivity.java

@@ -31,13 +31,18 @@ import android.app.Activity;
 import android.app.AlertDialog;
 import android.content.DialogInterface;
 import android.content.Intent;
+import android.graphics.Color;
 import android.graphics.Point;
 import android.media.AudioManager;
 import android.os.Bundle;
 import android.util.Log;
+import android.util.TypedValue;
+import android.view.View;
+import android.view.ViewGroup.LayoutParams;
 import android.view.WindowManager;
 import android.webkit.JavascriptInterface;
 import android.widget.EditText;
+import android.widget.TextView;
 import android.widget.Toast;
 
 import org.json.JSONException;
@@ -84,6 +89,9 @@ public class AppRTCDemoActivity extends Activity
   private AppRTCClient appRtcClient = new AppRTCClient(this, gaeHandler, this);
   private VideoStreamsView vsv;
   private Toast logToast;
+  private final LayoutParams hudLayout =
+      new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
+  private TextView hudView;
   private LinkedList<IceCandidate> queuedRemoteCandidates =
       new LinkedList<IceCandidate>();
   // Synchronize on quit[0] to avoid teardown-related crashes.
@@ -103,7 +111,18 @@ public class AppRTCDemoActivity extends Activity
     Point displaySize = new Point();
     getWindowManager().getDefaultDisplay().getSize(displaySize);
     vsv = new VideoStreamsView(this, displaySize);
+    vsv.setOnClickListener(new View.OnClickListener() {
+        @Override public void onClick(View v) {
+          toggleHUD();
+        }
+      });
     setContentView(vsv);
+    hudView = new TextView(this);
+    hudView.setTextColor(Color.BLACK);
+    hudView.setBackgroundColor(Color.WHITE);
+    hudView.setAlpha(0.4f);
+    hudView.setTextSize(TypedValue.COMPLEX_UNIT_PT, 5);
+    addContentView(hudView, hudLayout);
 
     if (!factoryStaticInitialized) {
       abortUnless(PeerConnectionFactory.initializeAndroidGlobals(this),
@@ -158,6 +177,35 @@ public class AppRTCDemoActivity extends Activity
     appRtcClient.connectToRoom(roomUrl);
   }
 
+  // Toggle visibility of the heads-up display.
+  private void toggleHUD() {
+    if (hudView.getVisibility() == View.VISIBLE) {
+      hudView.setVisibility(View.INVISIBLE);
+    } else {
+      hudView.setVisibility(View.VISIBLE);
+    }
+  }
+
+  // Update the heads-up display with information from |reports|.
+  private void updateHUD(StatsReport[] reports) {
+    if (hudView.getText().length() == 0) {
+      logAndToast("Tap the screen to toggle stats visibility");
+    }
+    StringBuilder builder = new StringBuilder();
+    for (StatsReport report : reports) {
+      if (!report.id.equals("bweforvideo")) {
+        continue;
+      }
+      for (StatsReport.Value value : report.values) {
+        String name = value.name.replace("goog", "").replace("Available", "")
+            .replace("Bandwidth", "").replace("Bitrate", "").replace("Enc", "");
+        builder.append(name).append("=").append(value.value).append(" ");
+      }
+      builder.append("\n");
+    }
+    hudView.setText(builder.toString() + hudView.getText());
+  }
+
   @Override
   public void onPause() {
     super.onPause();
@@ -216,11 +264,16 @@ public class AppRTCDemoActivity extends Activity
               }
               final Runnable runnableThis = this;
               boolean success = finalPC.getStats(new StatsObserver() {
-                  public void onComplete(StatsReport[] reports) {
+                  public void onComplete(final StatsReport[] reports) {
+                    runOnUiThread(new Runnable() {
+                        public void run() {
+                          updateHUD(reports);
+                        }
+                      });
                     for (StatsReport report : reports) {
                       Log.d(TAG, "Stats: " + report.toString());
                     }
-                    vsv.postDelayed(runnableThis, 10000);
+                    vsv.postDelayed(runnableThis, 1000);
                   }
                 }, null);
               if (!success) {
@@ -229,7 +282,7 @@ public class AppRTCDemoActivity extends Activity
             }
           }
         };
-      vsv.postDelayed(repeatedStatsLogger, 10000);
+      vsv.postDelayed(repeatedStatsLogger, 1000);
     }
 
     {