[Usage] Ignore usage events with empty package names

Signed-off-by: Muntashir Al-Islam <muntashirakon@riseup.net>

Author: MuntashirAkon

app/src/main/java/io/github/muntashirakon/AppManager/usage/AppUsageStatsManager.java

@@ -50,6 +50,7 @@
 import io.github.muntashirakon.AppManager.self.SelfPermissions;
 import io.github.muntashirakon.AppManager.utils.ContextUtils;
 import io.github.muntashirakon.AppManager.utils.ExUtils;
+import io.github.muntashirakon.AppManager.utils.Utils;
 import io.github.muntashirakon.proc.ProcFs;
 import io.github.muntashirakon.proc.ProcUidNetStat;
 
@@ -319,6 +320,10 @@ private List<PackageUsageInfo> getUsageStatsInternal(@UsageUtils.IntervalType in
         for (UsageEvents.Event event : events) {
             int eventType = event.getEventType();
             String packageName = event.getPackageName();
+            if (packageName == null) {
+                Log.i(TAG, "Ignored event with empty package name: " + Utils.prettyPrintObject(event));
+                continue;
+            }
             // Queries are sorted in descending order, so a not-running activity should be paused or
             // stopped first and then resumed (i.e., reversed logic).
             if (eventType == UsageEvents.Event.DEVICE_SHUTDOWN) {

app/src/main/java/io/github/muntashirakon/AppManager/utils/Utils.java

@@ -39,6 +39,7 @@
 
 import org.jetbrains.annotations.Contract;
 
+import java.lang.reflect.Field;
 import java.nio.ByteBuffer;
 import java.nio.CharBuffer;
 import java.nio.charset.StandardCharsets;
@@ -673,6 +674,34 @@ public static boolean isWifiActive(@NonNull Context context) {
         return info != null && info.getType() == ConnectivityManager.TYPE_WIFI;
     }
 
+    @NonNull
+    public static <T> String prettyPrintObject(@Nullable T obj) {
+        if (obj == null) {
+            return "null";
+        }
+        StringBuilder sb = new StringBuilder();
+        Class<?> clazz = obj.getClass();
+        sb.append(clazz.getSimpleName()).append("{");
+        Field[] fields = clazz.getDeclaredFields();
+        for (int i = 0; i < fields.length; i++) {
+            Field field = fields[i];
+            field.setAccessible(true);
+            sb.append(field.getName()).append("=");
+            try {
+                Object value = field.get(obj);
+                sb.append(value);
+            } catch (IllegalAccessException e) {
+                sb.append("N/A");
+            }
+            if (i < fields.length - 1) {
+                sb.append(", ");
+            }
+        }
+        sb.append("}");
+        return sb.toString();
+    }
+
+
     public static boolean isRoboUnitTest() {
         return "robolectric".equals(Build.FINGERPRINT);
     }