这是一个创建于 159 天前的主题，其中的信息可能已经有所发展或是发生改变。
public class HookInit implements IXposedHookLoadPackage {
@Override
public void handleLoadPackage ( final XC_LoadPackage.LoadPackageParam lpparam ) throws Throwable {
XposedHelpers.findAndHookMethod ( "android.app.ContextImpl", lpparam.classLoader, "checkCallingOrSelfPermission", String.class, new XC_MethodReplacement ( ){
@Override
protected Object replaceHookedMethod ( XC_MethodHook.MethodHookParam p1 ) throws Throwable {
int i=0;
return i;
}
}
);
XposedHelpers.findAndHookMethod ( "android.app.Application", lpparam.classLoader, "attach", Context.class, new XC_MethodHook ( ){
@Override
protected void afterHookedMethod ( MethodHookParam param ) throws Throwable {
Class <?>wmg=XposedHelpers.findClass ( "android.view.WindowManagerGlobal", lpparam.classLoader );
final Object wm=XposedHelpers.callStaticMethod ( wmg, "getWindowManagerService" );
Method setForcedDisplayDensityForUser=XposedHelpers.findMethodBestMatch ( wm.getClass ( ), "setForcedDisplayDensityForUser", int.class, int.class, int.class );
setForcedDisplayDensityForUser.invoke ( wm, 160, Display.DEFAULT_DISPLAY, AndroidAppHelper.currentApplicationInfo ( ).uid );
}
}
);
}
}
目的是想通过 WindowManagerGlobal 获取 WindowManagerService ，然后调用 setForcedDisplayDensityForUser 方法，因为这个方法会用 checkCallingOrSelfPermission 方法检查是否有权限，所以我修改了他的返回值为 0 。 setForcedDisplayDensityForUser 的源码：
@Override
public void setForcedDisplayDensityForUser(int displayId, int density, int userId) {
if (mContext.checkCallingOrSelfPermission(
android.Manifest.permission.WRITE_SECURE_SETTINGS) !=
PackageManager.PERMISSION_GRANTED) {
throw new SecurityException("Must hold permission " +
android.Manifest.permission.WRITE_SECURE_SETTINGS);
但这样修改后还是抛出异常"Must hold permission…" 大佬们有没有什么建议
14 条回复 • 2024-06-26 10:11:48 +08:00
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1
ssgooglg 159 天前
试试 gp_t
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2
ColoThor 159 天前
试试我的方法，在 initZygote 方法内添加代码
```language AndroidActivityManagerHook.getInstance().start(); ``` AndroidActivityManagerHook 类，把其中的 xxx.xxx.xxx.xxx,替换为实际的引用包名 ```language public class AndroidActivityManagerHook { public static String TAG = AndroidActivityManagerHook.class.getSimpleName(); public static AndroidActivityManagerHook getInstance() { return InstanceUtils.instance; } private AndroidActivityManagerHook() { } private static class InstanceUtils { private static final AndroidActivityManagerHook instance = new AndroidActivityManagerHook(); } public void start() { hookActivityManager(null); } private void hookActivityManager(ClassLoader classLoader) { try { String activityManagerClassName = "android.app.ActivityManager"; Class activityManagerClass = XposedHelpers.findClassIfExists(activityManagerClassName, classLoader); if (activityManagerClass != null) { XposedBridge.hookAllMethods(activityManagerClass, "checkComponentPermission", new XC_MethodHook() { @Override protected void beforeHookedMethod(MethodHookParam param) throws Throwable { super.beforeHookedMethod(param); try { String permission = (String) param.args[0]; if (TextUtils.isEmpty(permission)) { return; } if (!Manifest.permission.WRITE_SECURE_SETTINGS.equals(permission)) { return; } int uid = (int) param.args[1]; if (uid == 0) { return; } Context context = AndroidAppHelper.currentApplication().getApplicationContext(); if (context == null) { return; } String packageName = context.getPackageManager().getNameForUid(uid); if ("xxx.xxx.xxx.xxx".equals(packageName)) { param.setResult(PackageManager.PERMISSION_GRANTED); Log.w(TAG, "access " + permission + " to " + packageName); } } catch (Exception e) { e.printStackTrace(); Log.e(TAG, param.method.getName() + " error\n" + Log.getStackTraceString(e)); } } }); } else { Log.e(TAG, "class not find: " + activityManagerClassName); } } catch (Exception e) { Log.e(TAG, "hookActivityManager error:\n" + Log.getStackTraceString(e)); } } } ``` 最后别忘了添加作用域 系统框架 |
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5
eyeshuaji OP 来个大佬提点建议啊
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6
Nitsuya 157 天前
不知道你的需求是怎样的, 代码看上去是改默认屏幕的 dpi, 按理说应该注入 System Server. 孵化应用的时候, 判断包名, 修改全局 Dpi.
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8
Nitsuya 156 天前
@eyeshuaji
1.如果你只想全局修改 开发者模式里面直接改. 2.如果你想 打开某应用触发影响全局 dpi, 注入域 [android] 系统框架, 然后去看 aosp 应用启动流程,卡在 call 应用前调用. 3.如果只想改某个 app 的 dpi, github 去找项目. 不知道你的需求是怎样的. |
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9
Nitsuya 156 天前
针对你提出的问题, 我猜测你注入的是应用, 应用调用这类的 Api, 是 RPC 调用 system server 即 android(系统框架). 权限验证在 server 侧. 我想你可能大概不知道 域 跟 代码跑在哪个进程下的.
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