Log wrapper for multi-metrics in tron.

Test: Added new LogBuilderTest; runtest --path frameworks/base/core/tests/coretests/src/com/android/internal/logging/LogBuilderTest.java

new file:   core/java/com/android/internal/logging/LogWrapper.java

Change-Id: I8c64a07b95ab9a70f39663d4ec54f9ec1bf49063

core/java/com/android/internal/logging/EventLogTags.logtags

@@ -5,5 +5,6 @@ option java_package com.android.internal.logging;
 # interaction logs
 524287 sysui_view_visibility (category|1|5),(visible|1|6)
 524288 sysui_action (category|1|5),(pkg|3)
+524292 sysui_multi_action (content|4)
 524290 sysui_count (name|3),(increment|1)
 524291 sysui_histogram (name|3),(bucket|1)

core/java/com/android/internal/logging/LogBuilder.java

@@ -0,0 +1,67 @@
+package com.android.internal.logging;
+
+import android.util.EventLog;
+import android.util.SparseArray;
+import android.view.View;
+
+import com.android.internal.logging.nano.MetricsProto.MetricsEvent;
+
+
+/**
+ * Helper class to assemble more complex logs.
+ *
+ * @hide
+ */
+
+public class LogBuilder {
+
+    private SparseArray<Object> entries = new SparseArray();
+
+    public LogBuilder() {}
+
+
+    public LogBuilder setView(View view) {
+        entries.put(MetricsEvent.RESERVED_FOR_LOGBUILDER_VIEW, view.getId());
+        return this;
+    }
+
+    public LogBuilder setCategory(int category) {
+        entries.put(MetricsEvent.RESERVED_FOR_LOGBUILDER_CATEGORY, category);
+        return this;
+    }
+
+    public LogBuilder setType(int type) {
+        entries.put(MetricsEvent.RESERVED_FOR_LOGBUILDER_TYPE, type);
+        return this;
+    }
+
+    /**
+     * @param tag From your MetricsEvent enum.
+     * @param value One of Integer, Long, Float, String
+     * @return
+     */
+    public LogBuilder addTaggedData(int tag, Object value) {
+        if (!(value instanceof Integer ||
+            value instanceof String ||
+            value instanceof Long ||
+            value instanceof Float)) {
+            throw new IllegalArgumentException(
+                    "Value must be loggable type - int, long, float, String");
+        }
+        entries.put(tag, value);
+        return this;
+    }
+
+    /**
+     * Assemble logs into structure suitable for EventLog.
+     */
+    public Object[] serialize() {
+        Object[] out = new Object[entries.size() * 2];
+        for (int i = 0; i < entries.size(); i++) {
+            out[i * 2] = entries.keyAt(i);
+            out[i * 2 + 1] = entries.valueAt(i);
+        }
+        return out;
+    }
+}
+

core/java/com/android/internal/logging/MetricsLogger.java

@@ -17,10 +17,12 @@ package com.android.internal.logging;
 
 import android.content.Context;
 import android.os.Build;
+import android.util.EventLog;
 import android.view.View;
 
 import com.android.internal.logging.nano.MetricsProto.MetricsEvent;
 
+
 /**
  * Log all the things.
  *
@@ -71,6 +73,14 @@ public class MetricsLogger {
         action(context, category, Boolean.toString(value));
     }
 
+    public static void action(LogBuilder content) {
+        //EventLog.writeEvent(524292, content.serialize());
+        // Below would be the *right* way to do this, using the generated
+        // EventLogTags method, but that doesn't work.
+        EventLogTags.writeSysuiMultiAction(content.serialize());
+    }
+
+
     public static void action(Context context, int category, String pkg) {
         if (Build.IS_DEBUGGABLE && category == VIEW_UNKNOWN) {
             throw new IllegalArgumentException("Must define metric category");