如何通过Xposed强制让指定静态方法返回特定构造的l类实例？

Here's the full working code to hook the target private static method and force it to return your desired l class instance. I'll break down each part so you understand exactly what's happening:

import de.robv.android.xposed.IXposedHookLoadPackage;
import de.robv.android.xposed.XC_MethodHook;
import de.robv.android.xposed.XposedBridge;
import de.robv.android.xposed.XposedHelpers;
import de.robv.android.xposed.callbacks.XC_LoadPackage;

public class XiaomiHealthHook implements IXposedHookLoadPackage {
    @Override
    public void handleLoadPackage(XC_LoadPackage.LoadPackageParam lpparam) throws Throwable {
        // Only target the Xiaomi Health app to avoid unnecessary hooks
        if (!lpparam.packageName.equals("com.xiaomi.hm.health")) {
            return;
        }

        try {
            // Replace these placeholders with the actual full class names from your decompiled code
            Class<?> targetClass = XposedHelpers.findClass("com.xiaomi.hm.health.YOUR_TARGET_CLASS", lpparam.classLoader);
            Class<?> jEnumClass = XposedHelpers.findClass("com.xiaomi.hm.health.YOUR_J_ENUM_CLASS", lpparam.classLoader);
            Class<?> lClass = XposedHelpers.findClass("com.xiaomi.hm.health.YOUR_L_CLASS", lpparam.classLoader);

            // Hook the private static method "c" with 4 String parameters
            XposedHelpers.findAndHookMethod(targetClass, "c",
                    String.class, String.class, String.class, String.class,
                    new XC_MethodHook() {
                        @Override
                        protected void beforeHookedMethod(MethodHookParam param) throws Throwable {
                            super.beforeHookedMethod(param);

                            // 1. Get your specific j enum instance (replace "YOUR_DESIRED_J_CONSTANT" with the actual value)
                            Object customJVar = XposedHelpers.getStaticObjectField(jEnumClass, "YOUR_DESIRED_J_CONSTANT");

                            // 2. Extract the input parameters passed to the method
                            String str2 = (String) param.args[1];
                            String str3 = (String) param.args[2];
                            String str4 = (String) param.args[3];

                            // 3. Create the custom l instance using the constructor that takes j, str2, str3
                            Object customLInstance = XposedHelpers.newInstance(lClass, customJVar, str2, str3);

                            // 4. Call the "a" method on our new l instance with str4
                            XposedHelpers.callMethod(customLInstance, "a", str4);

                            // 5. Force the method to return our custom instance, bypassing all original logic
                            param.setResult(customLInstance);
                        }
                    });

            XposedBridge.log("Successfully hooked target method in Xiaomi Health!");
        } catch (Throwable e) {
            // Log errors for debugging purposes
            XposedBridge.log("Error hooking target method: " + e.getMessage());
            e.printStackTrace();
        }
    }
}

Key Customizations You Need to Make: #

• Replace Class Name Placeholders: Fill in the full class names from your decompiled code:
  • com.xiaomi.hm.health.YOUR_TARGET_CLASS: The class that contains the private static method c
  • com.xiaomi.hm.health.YOUR_J_ENUM_CLASS: The full package path for the j enum (e.g., com.xiaomi.hm.health.data.j)
  • com.xiaomi.hm.health.YOUR_L_CLASS: The full package path for the l class
• Set Your Desired j Constant: Replace "YOUR_DESIRED_J_CONSTANT" with the actual enum value you want to use (like "GENERIC" or another constant defined in the j enum)

Important Notes: #

• Package Filter: The code checks for the Xiaomi Health package to avoid hooking other apps—keep this unless you need to target multiple packages
• Debugging: Use XposedBridge.log() to print debug messages if you run into issues (this is essential for troubleshooting hook failures)
• Xposed Setup: Ensure your module project includes the Xposed API dependency (usually via Gradle: compileOnly 'de.robv.android.xposed:api:82') and that Xposed/LSPosed is installed and enabled on your device

内容的提问来源于stack exchange，提问作者amsuser