android app root or system privileges -

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i trying build android app can access /data dir (for example) without parsing output of command ran on shell after doing su.

i mean, after researching lot, , looking in code of root explorers, when need root perms parsing output of command after doing su.

what want doing like:

file file = new file("/data"); file[] files = file.listfiles();// list array of file (int = 0; < files.length; i++) {     file fileitem = files[i];     system.out.println("file name: "+fileitem.getname().tostring()) { }

for achieving think application process must running root begining of execution.

i tried run app shell after doing su way:

$su #am start -n com.example.test/.ui.activity

but same after looking @ output of ps command see application running user "u0_a110" , not root.

also tried parameter --user 0 , --user 1000, same results... think dalvik virtual machine drops privileges parent process.

i tried convert app system app moving /system/priv-app same results, ( running user of app not root , not system )

may with:

android:shareduserid="android.uid.system"

in manifest application runs user system @ least, tried run way app , placed in /system/priv-app , phone didn't finish booting.

i think error because app needs signed system key manufacturer.

its possible run android app root or @ least system ?

i know if cross compile linux app arm (or architecture of phone) , run app in shell root, app have root access, but, way? want achieve android java app.

as far know, there's no way java app achive this. assign system uid app , sign platform certification, still can't gain root privilege. idea of systemuid access system level apis such controlling airplane mode, getting framebuffer, force-stopping package etc, not controlling filesystem root privilege.


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