Leak canary: annotate simple task

app/src/debug/java/eu.faircode.email/CoalMine.java

@@ -19,13 +19,49 @@ package eu.faircode.email;
     Copyright 2018-2022 by Marcel Bokhorst (M66B)
 */
 
-import leakcanary.AppWatcher;
+import androidx.annotation.NonNull;
+
+import java.util.ArrayList;
+import java.util.Date;
+import java.util.List;
+
+import kotlin.Unit;
+import kotlin.jvm.functions.Function2;
 import leakcanary.LeakCanary;
+import shark.HeapField;
+import shark.HeapObject;
+import shark.ObjectInspector;
+import shark.ObjectReporter;
 
 public class CoalMine {
     static void setup(boolean enabled) {
+        List<ObjectInspector> inspectors = new ArrayList<>(LeakCanary.getConfig().getObjectInspectors());
+        inspectors.add(new ObjectInspector() {
+            @Override
+            public void inspect(@NonNull ObjectReporter reporter) {
+                String clazz = SimpleTask.class.getName();
+                reporter.whenInstanceOf(clazz, new Function2<ObjectReporter, HeapObject.HeapInstance, Unit>() {
+                    @Override
+                    public Unit invoke(ObjectReporter reporter, HeapObject.HeapInstance instance) {
+                        HeapField fname = instance.get(clazz, "name");
+                        if (fname != null) {
+                            String name = fname.getValue().readAsJavaString();
+                            reporter.getNotLeakingReasons().add("name=" + name);
+                        }
+                        HeapField fstarted = instance.get(clazz, "started");
+                        if (fstarted != null) {
+                            Long started = fstarted.getValue().getAsLong();
+                            if (started != null)
+                                reporter.getNotLeakingReasons().add("started=" + new Date(started));
+                        }
+                        return null;
+                    }
+                });
+            }
+        });
         LeakCanary.Config config = LeakCanary.getConfig().newBuilder()
                 .dumpHeap(enabled && BuildConfig.DEBUG)
+                .objectInspectors(inspectors)
                 .build();
         LeakCanary.setConfig(config);
         LeakCanary.INSTANCE.showLeakDisplayActivityLauncherIcon(BuildConfig.DEBUG);