SecurityException: Neither user 10057 nor current process has android.permission.INSTALL_PACKAGES

我的安装程序位于/ root / root系统/应用程序,“安装非市场应用程序”被检查,安装程序有权限

<uses-permission android:name="android.permission.INSTALL_PACKAGES"/>

这是我的通话功能

private void puk(Context context) throws IllegalArgumentException,IllegalAccessException,InvocationTargetException{

    String fileName = PAKAGE_FILE_NAME ;
    String dir_type = Environment.DIRECTORY_DOWNLOADS;

    File dir= Environment.getExternalStoragePublicDirectory(dir_type);
    java.io.File file = new java.io.File(dir,fileName);
    Uri packageUri = Uri.fromFile(file);

    PackageManager pm = context.getPackageManager();

    Class<? extends PackageManager> o = pm.getClass();
    Method[] allMethods=o.getMethods();

    for (Method m : allMethods) {
        if (m.getName().equals("installPackage")) { 
            Log.e(TAG,"installing the app.." );
            m.invoke(pm,new Object[] { packageUri,null,1,"com.mic.zapp"});
            break;
        }
    }

}

我收到这个错误

11-15 02:46:23.320: W/System.err(10848): java.lang.reflect.InvocationTargetException
 11-15 02:46:23.330: W/System.err(10848):   at java.lang.reflect.Method.invokeNative(Native Method)
 11-15 02:46:23.330: W/System.err(10848):   at java.lang.reflect.Method.invoke(Method.java:507)
 11-15 02:46:23.330: W/System.err(10848):   at com.mic.pvtapi.PvtApiReflectActivity.puk(PvtApiReflectActivity.java:56)
 11-15 02:46:23.330: W/System.err(10848):   at com.mic.pvtapi.PvtApiReflectActivity.onCreate(PvtApiReflectActivity.java:28)
 11-15 02:46:23.330: W/System.err(10848):   at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
 11-15 02:46:23.330: W/System.err(10848):   at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1722)
 11-15 02:46:23.330: W/System.err(10848):   at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1784)
 11-15 02:46:23.330: W/System.err(10848):   at android.app.ActivityThread.access$1500(ActivityThread.java:123)
 11-15 02:46:23.330: W/System.err(10848):   at android.app.ActivityThread$H.handleMessage(ActivityThread.java:939)
 11-15 02:46:23.330: W/System.err(10848):   at android.os.Handler.dispatchMessage(Handler.java:99)
 11-15 02:46:23.330: W/System.err(10848):   at android.os.Looper.loop(Looper.java:130)
 11-15 02:46:23.330: W/System.err(10848):   at android.app.ActivityThread.main(ActivityThread.java:3835)
 11-15 02:46:23.330: W/System.err(10848):   at java.lang.reflect.Method.invokeNative(Native Method)
 11-15 02:46:23.330: W/System.err(10848):   at java.lang.reflect.Method.invoke(Method.java:507)
 11-15 02:46:23.330: W/System.err(10848):   at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:847)
 11-15 02:46:23.330: W/System.err(10848):   at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:605)
 11-15 02:46:23.330: W/System.err(10848):   at dalvik.system.NativeStart.main(Native Method)
 11-15 02:46:23.330: W/System.err(10848): Caused by: java.lang.SecurityException: Neither user 10057 nor current process has android.permission.INSTALL_PACKAGES.
 11-15 02:46:23.340: W/System.err(10848):   at android.os.Parcel.readException(Parcel.java:1322)
 11-15 02:46:23.340: W/System.err(10848):   at android.os.Parcel.readException(Parcel.java:1276)
 11-15 02:46:23.340: W/System.err(10848):   at android.content.pm.IPackageManager$Stub$Proxy.installPackage(IPackageManager.java:2037)
 11-15 02:46:23.340: W/System.err(10848):   at android.app.ContextImpl$ApplicationPackageManager.installPackage(ContextImpl.java:2613)

我已经阅读了ti可以通过两种方式获得INSTALL_PAKAGES权限：用固件的密钥签署应用程序或将应用程序放在固件中.我的应用程序是从/ system / app运行,所以它必须获得权限.

有人知道有什么错,给我一些提示？谢谢

编辑：

向前一步,向后两步

我向应用添加了新的权限

<permission 
        android:name="com.mic.pvtapi.permission.INS_AP"
    android:label="etichetta_perm"
    android:protectionLevel="signatureOrSystem" />

<uses-permission android:name="com.mic.pvtapi.permission.INS_AP"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>

没有更多的错误

Neither user 10057 nor current process has android.permission.INSTALL_PACKAGES

但新的

11-15 19:43:58.895: I/ActivityManager(1838): Displayed com.mic.pvtapi/.PvtApiReflectActivity: +421ms
 11-15 19:43:58.955: D/dalvikvm(4008): GC_EXPLICIT freed 3K,51% free 2681K/5379K,external 0K/0K,paused 132ms
 11-15 19:43:58.955: W/ActivityManager(1838): No content provider found for: 
 11-15 19:43:58.955: E/PackageManager(1838): Couldn't create temp file for downloaded package file.
 11-15 19:43:58.955: W/dalvikvm(1838): threadid=13: thread exiting with uncaught exception (group=0x40018560)
 11-15 19:43:58.965: E/AndroidRuntime(1838): *** FATAL EXCEPTION IN SYSTEM PROCESS: PackageManager
 11-15 19:43:58.965: E/AndroidRuntime(1838): java.lang.NullPointerException
 11-15 19:43:58.965: E/AndroidRuntime(1838):    at com.android.server.PackageManagerService$FileInstallArgs.createCopyFile(PackageManagerService.java:5247)
 11-15 19:43:58.965: E/AndroidRuntime(1838):    at com.android.server.PackageManagerService$FileInstallArgs.copyApk(PackageManagerService.java:5255)
 11-15 19:43:58.965: E/AndroidRuntime(1838):    at com.android.server.PackageManagerService$InstallParams.handleStartCopy(PackageManagerService.java:5051)
 11-15 19:43:58.965: E/AndroidRuntime(1838):    at com.android.server.PackageManagerService$HandlerParams.startCopy(PackageManagerService.java:4902)
 11-15 19:43:58.965: E/AndroidRuntime(1838):    at com.android.server.PackageManagerService$PackageHandler.doHandleMessage(PackageManagerService.java:516)
 11-15 19:43:58.965: E/AndroidRuntime(1838):    at com.android.server.PackageManagerService$PackageHandler.handleMessage(PackageManagerService.java:461)
 11-15 19:43:58.965: E/AndroidRuntime(1838):    at android.os.Handler.dispatchMessage(Handler.java:99)
 11-15 19:43:58.965: E/AndroidRuntime(1838):    at android.os.Looper.loop(Looper.java:130)
 11-15 19:43:58.965: E/AndroidRuntime(1838):    at android.os.HandlerThread.run(HandlerThread.java:60)
 11-15 19:43:58.975: I/Process(1838): Sending signal. PID: 1838 SIG: 9
 11-15 19:43:59.005: I/ServiceManager(1637): service 'SurfaceFlinger' died

使我的手机崩溃,freez并重新启动