Adding toStrings() to the API.

Bug: 16979045
Change-Id: Ibbe1bcea6ab7981f62e7fb4bbe35f71e881166bd
diff --git a/telecomm/java/android/telecom/Call.java b/telecomm/java/android/telecom/Call.java
index de902025..10808da 100644
--- a/telecomm/java/android/telecom/Call.java
+++ b/telecomm/java/android/telecom/Call.java
@@ -624,6 +624,21 @@
                     parcelableCall.getExtras(),
                     parcelableCall.getIntentExtras());
         }
+
+        @Override
+        public String toString() {
+            StringBuilder sb = new StringBuilder();
+            sb.append("[pa: ");
+            sb.append(mAccountHandle);
+            sb.append(", hdl: ");
+            sb.append(Log.pii(mHandle));
+            sb.append(", caps: ");
+            sb.append(capabilitiesToString(mCallCapabilities));
+            sb.append(", props: ");
+            sb.append(mCallProperties);
+            sb.append("]");
+            return sb.toString();
+        }
     }
 
     public static abstract class Callback {
@@ -1000,6 +1015,48 @@
         }
     }
 
+    @Override
+    public String toString() {
+        return new StringBuilder().
+                append("Call [id: ").
+                append(mTelecomCallId).
+                append(", state: ").
+                append(stateToString(mState)).
+                append(", details: ").
+                append(mDetails).
+                append("]").toString();
+    }
+
+    /**
+     * @param state An integer value of a {@code STATE_*} constant.
+     * @return A string representation of the value.
+     */
+    private static String stateToString(int state) {
+        switch (state) {
+            case STATE_NEW:
+                return "NEW";
+            case STATE_RINGING:
+                return "RINGING";
+            case STATE_DIALING:
+                return "DIALING";
+            case STATE_ACTIVE:
+                return "ACTIVE";
+            case STATE_HOLDING:
+                return "HOLDING";
+            case STATE_DISCONNECTED:
+                return "DISCONNECTED";
+            case STATE_CONNECTING:
+                return "CONNECTING";
+            case STATE_DISCONNECTING:
+                return "DISCONNECTING";
+            case STATE_SELECT_PHONE_ACCOUNT:
+                return "SELECT_PHONE_ACCOUNT";
+            default:
+                Log.w(Call.class, "Unknown state %d", state);
+                return "UNKNOWN";
+        }
+    }
+
     /**
      * Adds a listener to this {@code Call}.
      *