I removed a system app (com.android.mms) and I have the .apk needed to restore it, however it won't install through the standard channels (running the .apk gives me "application not installed"). What's the proper way to install a system app's .apk?
You will need to push the .apk to the phone to the System partition to the folder
/system/priv-app when using Android 4.3 using
adb. You can find more info about
adb here: http://android-dls.com/wiki/index.php?title=ADB.
In order to write to
/system you likely have to remount it read-write:
adb shell su mount -o rw,remount /system
Or, do it entirely from the host's ADB:
adb root adb remount
Now you can place the
adb push my-app.apk /sdcard/ adb shell su cd /sdcard mv my-app.apk /system/app # or when using Android 4.3 or higher mv my-app.apk /system/priv-app
Afterwards if the flags are not already set change the permissions. All System-Apps need to have the permissions
rw-r--r--. You can also change them via ADB with the command
chmod 644 /path_to/your_file. Though it's quite old, this may help
After you have placed the
.apk you need to reboot your device. For example with
Carl Parker writes about it on Android Authority:
(partly reproduced here in case the original post goes down)
For Apps Installed on the Device
- Assuming you have installed the app on your device, go to the appxe2x80x99s Google Play Store link and take note of the words after xe2x80x9c?id=xe2x80x9d and ignore the rest.
- Connect your device to the computer via USB cable.
- Open the command prompt on your computer and type the following commands:
adb remount adb shell su cd /data/app/
- Type the command
ls appfilename*(where xe2x80x9cappfilenamexe2x80x9d is the appxe2x80x99s ID on Google Play Store; make sure you include the asterisk at the end). This command will display the appxe2x80x99s complete APK filename.
- Enter the following command:
mv apk_full_filename_here /system/app/apk_full_filename_here exit exit adb reboot
- The device will now reboot. Your app is now saved as a system app.
For Apps Whose APKs Are on the PC Hard Drive
- Open a command prompt on your computer and navigate to where the APK file is located.
- Enable USB debugging on your device and connect your device to the computer via USB cable.
- Enter the following commands:
adb remount adb push apk-filename-here /system/app/ adb shell chmod 644 /system/app/apk-filename-here adb reboot
Your phone will automatically reboot. Your app will now be saved as a system app.
note that when playing with adb you will install apps via their package file name (meaning, at the command prompt you will type >adb install myFile.apk)
but you will uninstall them via their package name (>adb uninstall com.this.that.otherthing)
You won't be able to install a package until you've uninstalled its predecessor.
It'll help to add adb to your PATH so that you can just go to the directory where the .apk file is and type adb install myFile.apk.
You need to have the Android SDK installed (or at least a tool that's called adb). Further you need to allow "Non Market installs" on your device.
After this is done you change to the folder that contains the file with a console. Then connect your phone (via USB) and run
adb install appname.apk