Update README.md

README.md

@@ -4,7 +4,11 @@
 
 An Android library that provides APIs to a Unix (root) shell.
 
-Some poorly coded applications requests a new shell (call `su`, or worse `su -c <commands>`) for every single command, which is very inefficient. This library makes sharing a single, globally shared shell session in Android applications super easy: developers don't have to worry about concurrency issues, and it comes with a rich selection of both synchronous and asynchronous APIs to create a powerful root app.
+Some poorly coded applications requests a new shell (call `su`, or worse `su -c <commands>`) for every single command, which is very inefficient. This library makes sharing a single, globally shared shell session in Android applications super easy: developers won't have to bother about concurrency issues, and with a rich selection of both synchronous and asynchronous APIs, it is much easier to create a powerful root app.
+
+This library bundles with full featured `busybox` binaries. App developers can easily setup and create an internal `busybox` environment with the built-in helper method without relying on potentially flawed (or even no) external `busybox`. If you don't need the additional `busybox` binaries and willing to minimize APK size, [Proguard](https://developer.android.com/studio/build/shrink-code.html) is smart enough to remove the binaries for you.
+
+`libsu` also comes with a whole suite of I/O classes, re-creating `java.io` classes but enhanced with root access. Without even thinking about command-lines, you can use `File`, `RandomAccessFile`, `FileInputStream`, and `FileOutputStream` equivalents on all files that are only accessible with root permissions. The I/O stream classes are carefully optimized and have very promising performance.
 
 One complex Android application using `libsu` for all root related operations is [Magisk Manager](https://github.com/topjohnwu/MagiskManager).
 
@@ -14,21 +18,26 @@ repositories {
     maven { url 'https://jitpack.io' }
 }
 dependencies {
-    implementation 'com.github.topjohnwu:libsu:1.0.1'
+    implementation 'com.github.topjohnwu:libsu:1.1.1'
 }
 ```
 
 ## Simple Tutorial
 
 ### Setup
-Subclass `Shell.ContainerApp` and use it as your `Application`:
+Subclass `Shell.ContainerApp` and use it as your `Application`.  
+Set flags, initializers, or busybox as soon as possible:
 
 ```java
 public class ExampleApp extends Shell.ContainerApp {
-    public ExampleApp() {
-        // Set some flags here if you need
+    @Override
+    public void onCreate() {
+        super.onCreate();
+        // Set flags
         Shell.setFlags(Shell.FLAG_REDIRECT_STDERR);
         Shell.verboseLogging(BuildConfig.DEBUG);
+        // Use internal busybox
+        BusyBox.setup(this);
     }
 }
 ```
@@ -90,14 +99,41 @@ List<String> callbackList = new CallbackList<String>() {
 Shell.Async.su(callbackList, "for i in 1 2 3 4 5; do echo $i; sleep 1; done");
 ```
 
+### I/O
+`libsu` also comes with a rich suite of I/O classes for developers to access files using the shared root shell:
+
+```java
+/* Treat files that require root access just like ordinary files */
+SuFile logs = new SuFile("/cache/magisk.log");
+if (logs.exists()) {
+    try (InputStream in = new SuFileInputStream(logs);
+         OutputStream out = new SuFileOutputStream("/data/magisk.log.bak")) {
+        /* All file data can be accessed by Java Streams */
+
+        // For example, use a helper method to copy the logs
+        ShellUtils.pump(in, out);
+    } catch (IOException e) {
+        e.printStackTrace();
+    }
+}
+```
+
 ### Advanced
 Initialize the shell with custom `Shell.Initializer`, similar to what `.bashrc` will do.
 
 ```java
 Shell.setInitializer(new Shell.Initializer() {
     @Override
     public void onRootShellInit(@NonNull Shell shell) {
-        shell.run(null, null, "export PATH=" + BUSYBOX_PATH + ":$PATH");
+        /* Construct the initializer within Application if you need Context reference
+         * like the example below (getResources()). Application contexts won't leak memory, but
+         * Activities do! */
+        try (InputStream bashrc = getResources().openRawResource(R.raw.bashrc)) {
+            // Load a script from raw resources
+            shell.loadInputStream(null, null, bashrc);
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
     }
 });
 ```
@@ -106,4 +142,4 @@ Shell.setInitializer(new Shell.Initializer() {
 
 This repo also comes with an example app (`:example`), check the code and play/experiment with it.
 
-More detailed full documentation is in the project's [JavaDoc Page](https://topjohnwu.github.io/libsu).
+I strongly recommend all developers to check out the more detailed full documentation: [JavaDoc Page](https://topjohnwu.github.io/libsu).