Add README for ParcelableList

parcelablelist/README.md

@@ -1,3 +1,19 @@
 # ParcelableList
 
-Parcelable list with splice support.
+![Maven Central](https://img.shields.io/maven-central/v/dev.rikka.rikkax.parcelablelist/parcelablelist)
+
+Binder has total 1MB buffer size across the process (64KB for each Binder thread).
+When transferring a large list of Parcelable objects (e.g., `getInstalledPackages` with flags like `GET_ACTIVITIES`), 
+it's easy to exceed this limit (`TransactionTooLargeException`). Therefore, the framework has created `android.content.pm.ParceledListSlice` which split the list into multiple transactions.
+
+This library has `ParcelableListSlice` and `StringListSlice` class which is similar to the framework classes.
+
+There is also a base class, `BaseParcelableListSlice`, for extension to transfer non-Parcelable objects. 
+
+## Download
+
+```groovy
+dependencies {
+    implementation "dev.rikka.rikkax.parcelablelist:parcelablelist:1.0.0"
+}
+```