Android Development, APK file installed to \system\app solution only for Root machine

In  Android , if you want to use System-restricted permissions (such as  android.permission.write_secure_settings), we need to install the program to  /system/ Under the app/ . The following is an example of  SecureSetting.apk , which demonstrates this operation. Need to prepare a mobile phone with  Root  access. 1. Connect mobile phones and computers via  USB . 2, use  adb  control mobile phone. SOURCE print?    1. $ adb push SecureSetting.apk /sdcard/  //  Upload the files you want to install and prepare for installation.      2. $ adb shell     3. $ su  //  Switch to  root  users. If you do not get  Root  permissions, this step will not succeed.      4. # mount -o remount,rw -t yaffs2 /dev/block /mtdblock3 /system //  let the partition be writable.      5. # cat /sdcard/securesetting.apk > /system/app/ securesetting.apk //  This step can be implemented with  cp , but the command is not included in the general device. If you use  mv  error:failed on  '/sdcard/network.apk '  - cross-device link will appear.       6. # mount -o remount,ro -t yaffs2 /dev/block/mtdblock3 / system //  Restore partition Properties, read-only.      7. # exit     8. $ exit   $ adb push securesetting.apk /sdcard/  //  upload the files to be installed and prepare for installation. $ adb shell$ su //  switch to  root  user. If you do not get  Root  permissions, this step will not succeed. # mount -o remount,rw -t yaffs2 /dev/block/mtdblock3 /system //  Let the partition be writable. # cat /sdcard/securesetting.apk > /system/app/securesetting.apk //  This step can be used  cp  is implemented, but the command is not included in the general device. If you use  mv  error:failed on  '/sdcard/network.apk '  - cross-device link will appear.  # mount -o remount,ro -t yaffs2 /dev/block/mtdblock3 /system //   Restore partition properties, read-only. # exit$ exit restart, you can see that the  SecureSetting  has been installed.

Add, if you want to implement your own apk installed directly into the/system/app/, you need to write a installer.apk, inside the shell will be the main apk through the cat to write/system/app, and then use chmod Modify permissions, And then execute reboot on the line.

Attach the Java Execution Shell code:

public final class rootcmd {//  executes the Linux command and outputs the result protected static string  Execrootcmd (string paramstring)  {String result =  "result : "; try { Process localprocess = runtime.getruntime (). EXEC ("su ");//  The root-processed Android system has the SU Command Outputstream localoutputstream = localprocess.getoutputstream ();D Ataoutputstream localdataoutputstream = new dataoutputstream (LocalOutputStream); Nputstream localinputstream = localprocess.getinputstream ();D atainputstream  Localdatainputstream = new datainputstream (Localinputstream); String str1 = string.valueof (paramstring); string str2 = str1 +  "\ n"; localdataoutputstream.writebytes (STR2); Localdataoutputstream.flush (); string str3 = null;//while  ((Str3 = localdatainputstream.readline ())  !=  null)  {//log.d ("Result",   str3);//}localdataoutputstream.writebytes ("exit\n"); Localdataoutputstream.flush (); Localprocess.waitfor (); Return result;}  catch  (exception localexception)  {localexception.printstacktrace (); return result;}}   executes the Linux command but does not pay attention to the result output protected static int execrootcmdsilent (string paramstring)  { Try {process localprocess = runtime.getruntime (). EXEC ("su"); object localobject =  localprocess.getoutputstream ();D ataoutputstream localdataoutputstream = new  DataOutputStream ((OutputStream)  localobject); String str = string.valueof (paramstring);localobject = str +  "\ n"; Localdataoutputstream.writebytes (String)  localobject); Localdataoutputstream.flush (); Localdataoutputstream.writebytes ("exit\n"); Localdataoutputstream.flush (); Localprocess.waitfor ();int  Result = localprocess.exitvalue ();return  (Integer)  result;}  catch  (exception localexception)  {localexception.printstacktrace (); return -1;}}   Determine if Android is root, that is, whether to get root privileges protected static boolean haveroot ()  {int i  = execrootcmdsilent ("Echo test"); //  detects if  (i != -1)  {by executing a test command Return true;} Return false;}}

Android Development, APK file installed to \system\app solution only for Root machine