🎨 Palette: Micro-UX improvements for sample app

.Jules/palette.md

@@ -0,0 +1,3 @@
+## 2025-05-15 - State Feedback for Native Library Loading
+**Learning:** For actions that change the global state of the application (like loading a native library or initializing a hook), providing only a Toast is insufficient because the button remains interactive, which can lead to confusion or redundant calls.
+**Action:** Disable the triggering button and update its text (e.g., from "load lib.so" to "lib.so loaded") immediately upon success to provide persistent, clear state feedback and prevent redundant interactions.

app/src/main/java/com/bytedance/shadowhook/sample/MainActivity.java

@@ -29,6 +29,8 @@
 import android.os.Bundle;
 import android.util.Log;
 import android.view.View;
+import android.widget.Button;
+import android.widget.Toast;
 
 import com.bytedance.shadowhook.ShadowHook;
 import com.bytedance.shadowhook.systest.SysTest;
@@ -50,37 +52,49 @@ protected void onCreate(Bundle savedInstanceState) {
 
     public void onUnitTestHookSymAddrClick(View view) {
         NativeHandler.nativeHookSymAddr(Build.VERSION.SDK_INT);
+        Toast.makeText(this, "Hook by symbol address", Toast.LENGTH_SHORT).show();
     }
 
     public void onUnitTestHookSymNameClick(View view) {
         NativeHandler.nativeHookSymName(Build.VERSION.SDK_INT);
+        Toast.makeText(this, "Hook by symbol name", Toast.LENGTH_SHORT).show();
     }
 
     public void onUnitTestUnhookClick(View view) {
         NativeHandler.nativeUnhook();
+        Toast.makeText(this, "Unhook", Toast.LENGTH_SHORT).show();
     }
 
     public void onUnitTestLoadClick(View view) {
         if(!hookee2Loaded) {
             hookee2Loaded = true;
             System.loadLibrary("hookee2");
+            if (view instanceof Button) {
+                ((Button) view).setEnabled(false);
+                ((Button) view).setText("libhookee2.so loaded");
+            }
+            Toast.makeText(this, "libhookee2.so loaded", Toast.LENGTH_SHORT).show();
         }
     }
 
     public void onUnitTestRunClick(View view) {
         NativeHandler.nativeRun(hookee2Loaded);
+        Toast.makeText(this, "Unit test run", Toast.LENGTH_SHORT).show();
     }
 
     public void onSystemTestHookClick(View view) {
         SysTest.hook();
+        Toast.makeText(this, "System test hook", Toast.LENGTH_SHORT).show();
     }
 
     public void onSystemTestUnhookClick(View view) {
         SysTest.unhook();
+        Toast.makeText(this, "System test unhook", Toast.LENGTH_SHORT).show();
     }
 
     public void onSystemTestRunClick(View view) {
         SysTest.run();
+        Toast.makeText(this, "System test run", Toast.LENGTH_SHORT).show();
     }
 
     public void onGetRecordsClick(View view) {
@@ -90,12 +104,14 @@ public void onGetRecordsClick(View view) {
             for (String line : records.split("\n")) {
                 Log.i(tag, line);
             }
+            Toast.makeText(this, "Records printed to logcat", Toast.LENGTH_SHORT).show();
         }
     }
 
     public void onDumpRecordsClick(View view) {
         String pathname = getApplicationContext().getFilesDir() + "/shadowhook_records.txt";
         NativeHandler.nativeDumpRecords(pathname);
+        Toast.makeText(this, "Records dumped to " + pathname, Toast.LENGTH_LONG).show();
 
         BufferedReader br = null;
         try {

app/src/main/res/layout/activity_main.xml

@@ -13,7 +13,8 @@
         <LinearLayout
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
-            android:orientation="vertical">
+            android:orientation="vertical"
+            android:padding="16dp">
 
             <TextView style="@style/Theme.TextView.Top"
                 android:text="adb logcat -b main -s shadowhook_tag" />