Android :: (Without Violating Any Licenses) Write Native C / C++ App On Top Of Droid - Make It Run As Daemon Process?
May 10, 2010
Is it possible (without violating any licenses) to write a native C/C++ application on top of the Android OS and make it run as a daemon process?
There are already several daemon process' running which one can see with the 'ps' command, the legal part concerns me the most. And also the lack of documentation on how to exactly do this.
For the writing part, I guess one could use basic Linux programming concepts, since Android supports at least to some level the standard Posix API. To make it run as the phone boots, some modifications is of course required in init as well.
I have no plans to have this app in the Android Market, so installing it manually to the phone is not a problem. As long as it does not require re-compiling the whole OS or kernel.
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Aug 25, 2010
Is there a way to craft a daemon process as to make it "unlistable" to a process viewer?
OR
is there a way to dynamically change a process name?
I'd like to design a security application without having to modify the firmware, if possible (yes I know about "security through obscurity"...).
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Feb 20, 2010
I'm interested in the following features:
Writing an app for Android Market that is written completely in C++ (a port of existing product actually).
Use fast screen-buffer pixel pushing (or rather using OpenGL ES for this).
Grab user input and direct it to C++ code.
Is it legal to write such an app for Market? Is Market policy somehow strict to such things?
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Mar 26, 2010
Can we create a daemon process in android. If possible can provide some document.
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Nov 13, 2010
Using the ndk I have compiled a code written in C. The program is a ecm format files conversion, here the native code: link . I chose to do with JNI for reasons of optimization, because the program requires a large amount of CPU processing.The files to convert can be very large, between 200mb and 700mb. Everything works perfectly, but when trying to convert files bigger than 600Mb, near the end of the conversion process, the application stops with the following error message:
11-13 20:24:36.775: WARN/dalvikvm(1468): ReferenceTable overflow (max=512)
11-13 20:24:36.775: WARN/dalvikvm(1468): Last 10 entries in JNI local reference table:
11-13 20:24:36.775: WARN/dalvikvm(1468): 502: 0x465117b0 cls=Ljava/lang/Class; 'Lunecm4droid/kiio/es/mainUECM;' (164 bytes)
11-13 20:24:36.775: WARN/dalvikvm(1468): 503: 0x465117b0 cls=Ljava/lang/Class; 'Lunecm4droid/kiio/es/mainUECM;' (164 bytes)
11-13 20:24:36.775: WARN/dalvikvm(1468): 504: 0x465117b0 cls=Ljava/lang/Class; 'Lunecm4droid/kiio/es/mainUECM;' (164 bytes)
11-13 20:24:36.775: WARN/dalvikvm(1468): 505: 0x465117b0 cls=Ljava/lang/Class; 'Lunecm4droid/kiio/es/mainUECM;' (164 bytes)
11-13 20:24:36.775: WARN/dalvikvm(1468): 506: 0x465117b0 cls=Ljava/lang/Class; 'Lunecm4droid/kiio/es/mainUECM;' (164 bytes)
11-13 20:24:36.775: WARN/dalvikvm(1468): 507: 0x465117b0 cls=Ljava/lang/Class; 'Lunecm4droid/kiio/es/mainUECM;' (164 bytes)
11-13 20:24:36.775: WARN/dalvikvm(1468): 508: 0x465117b0 cls=Ljava/lang/Class; 'Lunecm4droid/kiio/es/mainUECM;' (164 bytes)
11-13 20:24:36.786: WARN/dalvikvm(1468): 509: 0x465117b0 cls=Ljava/lang/Class; 'Lunecm4droid/kiio/es/mainUECM;' (164 bytes)
11-13 20:24:36.786: WARN/dalvikvm(1468): 510: 0x465117b0 cls=Ljava/lang/Class; 'Lunecm4droid/kiio/es/mainUECM;' (164 bytes)
11-13 20:24:36.786: WARN/dalvikvm(1468): 511: 0x465117b0 cls=Ljava/lang/Class; 'Lunecm4droid/kiio/es/mainUECM;' (164 bytes)
11-13 20:24:36.786: WARN/dalvikvm(1468): JNI local reference table summary (512 entries):
11-13 20:24:36.786: WARN/dalvikvm(1468): 512 of Ljava/lang/Class; 164B (1 unique)
11-13 20:24:36.786: WARN/dalvikvm(1468): Memory held directly by tracked refs is 164 bytes
11-13 20:24:36.786: ERROR/dalvikvm(1468): Failed adding to JNI local ref table (has 512 entries)
11-13 20:24:36.786: INFO/dalvikvm(1468): "Thread-9" prio=5 tid=8 RUNNABLE
11-13 20:24:36.786: INFO/dalvikvm(1468): | group="main" sCount=0 dsCount=0 s=N obj=0x46523c48 self=0x30e960
11-13 20:24:36.786: INFO/dalvikvm(1468): | sysTid=1506 nice=0 sched=0/0 cgrp=default handle=2542616
11-13 20:24:36.786: INFO/dalvikvm(1468): | schedstat=( 200042694099 61087921121 333928 )
11-13 20:24:36.786: INFO/dalvikvm(1468): at unecm4droid.kiio.es.mainUECM.invokeNativeFunction(Native Method)
11-13 20:24:36.786: INFO/dalvikvm(1468): at unecm4droid.kiio.es.mainUECM.access$10(mainUECM.java:490)
11-13 20:24:36.786: INFO/dalvikvm(1468): at unecm4droid.kiio.es.mainUECM$11.run(mainUECM.java:735)
11-13 20:24:36.786: ERROR/dalvikvm(1468): VM aborting
11-13 20:24:36.795: INFO/DEBUG(121): *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***
11-13 20:24:36.795: INFO/DEBUG(121): Build fingerprint: 'google/passion/passion/mahimahi:2.2/FRF91/43546:user/release-keys'
11-13 20:24:36.795: INFO/DEBUG(121): pid: 1468, tid: 1506 >>> unecm4droid.kiio.es <<<
11-13 20:24:36.795: INFO/DEBUG(121): signal 11 (SIGSEGV), fault addr deadd00d
11-13 20:24:36.795: INFO/DEBUG(121): r0 00000026 r1 afd14699 r2 afd14699 r3 00000000
11-13 20:24:36.795: INFO/DEBUG(121): r4 802a3448 r5 802a3448 r6 0030e960 r7 0030e9b0
11-13 20:24:36.795: INFO/DEBUG(121): r8 464c9b48 r9 43277fa4 10 43277f8c fp 464c9ed8
11-13 20:24:36.795: INFO/DEBUG(121): ip deadd00d sp 464c9130 lr afd16155 pc 802424e0 cpsr 20000030
11-13 20:24:36.795: INFO/DEBUG(121): d0 643a64696f72646e d1 6472656767756265
11-13 20:24:36.795: INFO/DEBUG(121): d2 465117b046511767 d3 465117b04651170a
11-13 20:24:36.795: INFO/DEBUG(121): d4 465117b0465117b0 d5 465117b0465117b0
11-13 20:24:36.795: INFO/DEBUG(121): d6 465117b0465117b0 d7 465117b0465117b0
11-13 20:24:36.795: INFO/DEBUG(121): d8 4198000041b80000 d9 43e0000000000000
11-13 20:24:36.795: INFO/DEBUG(121): d10 41dfffffffc00000 d11 c3e0000000000000
11-13 20:24:36.795: INFO/DEBUG(121): d12 0000000000000000 d13 0000000000000000
11-13 20:24:36.795: INFO/DEBUG(121): d14 0000000000000000 d15 0000000000000000
11-13 20:24:36.795: INFO/DEBUG(121): d16 47d7202800000000 d17 c083180000000000
11-13 20:24:36.795: INFO/DEBUG(121): d18 4035000000000000 d19 0000000000000000
11-13 20:24:36.795: INFO/DEBUG(121): d20 3ff0000000000000 d21 8000000000000000
11-13 20:24:36.795: INFO/DEBUG(121): d22 c035000000000000 d23 ff00080008000700
11-13 20:24:36.795: INFO/DEBUG(121): d24 ff00080008000700 d25 ff00080008000700
11-13 20:24:36.795: INFO/DEBUG(121): d26 0100010001000100 d27 0100010001000100
11-13 20:24:36.795: INFO/DEBUG(121): d28 0100010001000100 d29 3ff0000000000000
11-13 20:24:36.795: INFO/DEBUG(121): d30 0000000000000000 d31 3ff0000000000000
11-13 20:24:36.795: INFO/DEBUG(121): scr 80000012
11-13 20:24:36.865: INFO/DEBUG(121): #00 pc 000424e0 /system/lib/libdvm.so
11-13 20:24:36.865: INFO/DEBUG(121): #01 pc 0004655e /system/lib/libdvm.so
11-13 20:24:36.865: INFO/DEBUG(121): #02 pc 000466f0 /system/lib/libdvm.so
11-13 20:24:36.865: INFO/DEBUG(121): #03 pc 00001110 /data/data/unecm4droid.kiio.es/lib/libndkfoo.so
11-13 20:24:36.865: INFO/DEBUG(121): #04 pc 000016da /data/data/unecm4droid.kiio.es/lib/libndkfoo.so
11-13 20:24:36.865: INFO/DEBUG(121): #05 pc 00001bda /data/data/unecm4droid.kiio.es/lib/libndkfoo.so
11-13 20:24:36.865: INFO/DEBUG(121): #06 pc 00001f2e /data/data/unecm4droid.kiio.es/lib/libndkfoo.so
11-13 20:24:36.865: INFO/DEBUG(121): #07 pc 00017034 /system/lib/libdvm.so
11-13 20:24:36.865: INFO/DEBUG(121): #08 pc 00045744 /system/lib/libdvm.so
11-13 20:24:36.865: INFO/DEBUG(121): #09 pc 0004ae8e /system/lib/libdvm.so
11-13 20:24:36.865: INFO/DEBUG(121): #10 pc 0001bf98 /system/lib/libdvm.so
11-13 20:24:36.865: INFO/DEBUG(121): #11 pc 00022bc4 /system/lib/libdvm.so
11-13 20:24:36.865: INFO/DEBUG(121): #12 pc 00021a60 /system/lib/libdvm.so
11-13 20:24:36.865: INFO/DEBUG(121): #13 pc 0005cf60 /system/lib/libdvm.so
11-13 20:24:36.865: INFO/DEBUG(121): #14 pc 0005d190 /system/lib/libdvm.so
11-13 20:24:36.876: INFO/DEBUG(121): #15 pc 000500d0 /system/lib/libdvm.so
11-13 20:24:36.876: INFO/DEBUG(121): #16 pc 00010f44 /system/lib/libc.so
11-13 20:24:36.876: INFO/DEBUG(121): #17 pc 00010a30 /system/lib/libc.so
11-13 20:24:36.876: INFO/DEBUG(121): code around pc:
11-13 20:24:36.876: INFO/DEBUG(121): 802424c0 20061861 f7d418a2 2000ea7c ebdaf7d4
11-13 20:24:36.876: INFO/DEBUG(121): 802424d0 58234808 b1036bdb f8df4798 2026c01c
11-13 20:24:36.876: INFO/DEBUG(121): 802424e0 0000f88c ec40f7d4 00060f8c fffe1ecc
11-13 20:24:36.876: INFO/DEBUG(121): 802424f0 fffe5140 000003a4 deadd00d f8dfb40e
11-13 20:24:36.876: INFO/DEBUG(121): 80242500 b503c02c bf00490a 188ba200 f853aa03
11-13 20:24:36.876: INFO/DEBUG(121): code around lr:
11-13 20:24:36.876: INFO/DEBUG(121): afd16134 000ef9b0 22022100 ec98f7f7 463289a1
11-13 20:24:36.876: INFO/DEBUG(121): afd16144 5080f421 81a04629 000ef9b4 ec1ef7f7
11-13 20:24:36.876: INFO/DEBUG(121): afd16154 bf00bd70 4604b510 000ef9b0 ec06f7f7
11-13 20:24:36.876: INFO/DEBUG(121): afd16164 bfbe2800 f42389a3 81a35380 6d21db02
11-13 20:24:36.876: INFO/DEBUG(121): afd16174 6523180b bf00bd10 b085b5f0 bf004c41
11-13 20:24:36.876: INFO/DEBUG(121): stack:
11-13 20:24:36.876: INFO/DEBUG(121): 464c90f0 000005a0
11-13 20:24:36.876: INFO/DEBUG(121): 464c90f4 afd146c9 /system/lib/libc.so
11-13 20:24:36.876: INFO/DEBUG(121): 464c90f8 afd42498 /system/lib/libc.so
11-13 20:24:36.876: INFO/DEBUG(121): 464c90fc afd43bc8 /system/lib/libc.so
11-13 20:24:36.876: INFO/DEBUG(121): 464c9100 00000000
11-13 20:24:36.876: INFO/DEBUG(121): 464c9104 afd156e3 /system/lib/libc.so
11-13 20:24:36.876: INFO/DEBUG(121): 464c9108 afd14699 /system/lib/libc.so
11-13 20:24:36.876: INFO/DEBUG(121): 464c910c afd14699 /system/lib/libc.so
11-13 20:24:36.876: INFO/DEBUG(121): 464c9110 afd146f0 /system/lib/libc.so
11-13 20:24:36.876: INFO/DEBUG(121): 464c9114 802a3448 /system/lib/libdvm.so
11-13 20:24:36.876: INFO/DEBUG(121): 464c9118 802a3448 /system/lib/libdvm.so
11-13 20:24:36.876: INFO/DEBUG(121): 464c911c 0030e960 [heap]
11-13 20:24:36.876: INFO/DEBUG(121): 464c9120 0030e9b0 [heap]
11-13 20:24:36.876: INFO/DEBUG(121): 464c9124 afd146fd /system/lib/libc.so
11-13 20:24:36.876: INFO/DEBUG(121): 464c9128 df002777
11-13 20:24:36.876: INFO/DEBUG(121): 464c912c e3a070ad
11-13 20:24:36.876: INFO/DEBUG(121): #00 464c9130 465117b0 /dev/ashmem/mspace/dalvik-heap/2 (deleted)
11-13 20:24:36.876: INFO/DEBUG(121): 464c9134 80246563 /system/lib/libdvm.so
11-13 20:24:36.876: INFO/DEBUG(121): #01 464c9138 000b4890 [heap]
11-13 20:24:36.876: INFO/DEBUG(121): 464c913c 00000000
11-13 20:24:36.876: INFO/DEBUG(121): 464c9140 00000051
11-13 20:24:36.876: INFO/DEBUG(121): 464c9144 0030e960 [heap]
11-13 20:24:36.876: INFO/DEBUG(121): 464c9148 000b4890 [heap]
11-13 20:24:36.876: INFO/DEBUG(121): 464c914c 46512b88 /dev/ashmem/mspace/dalvik-heap/2 (deleted)
11-13 20:24:36.876: INFO/DEBUG(121): 464c9150 43277fac
11-13 20:24:36.876: INFO/DEBUG(121): 464c9154 802466f5 /system/lib/libdvm.so
I tried to debug a native process using gdb but I only give this message when app crash:Program received signal SIGSTOP, Stopped (signal).Does anyone could help me find more clues about the error?
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Feb 16, 2010
I am making an android application that shows a list with users, I would like to add the image,name,status,and a button in every row of the list, just like in the androids 1.6 native caller-> favorites tab.Until know I have managed to add the image and name using an ListActivity but when I try to add the button the list becomes unselected.So I have 2 questions, first is the list mentioned above listviews or listactivities? also is this possible using listActivity? and second, what is the difference of the above mentioned classes?
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Feb 4, 2010
It didn't take me long to realize update.zip installations of ROMs don't always work like they should, meaning the only way to install a ROM is via Nandroid restore. But, that clears all my data with it, meaning I have to re-DL and reconfigure all my app and settings. But with new ROM versions coming out every day, going through this process of repeat-reconfiguration is starting to become a major hassle. What options are there for avoiding this headache?
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Sep 16, 2010
I have a non-rooted Motorola Droid running 2.2 and I want to root to try out a ROM. I want to make sure I do this right. I don't want to lose any data (pictures, texts, etc) and I don't want to lose any apps. I've read a bunch of threads and it sounds like this is the general order I should proceed in:
1 - Backup data with MyBackupPro
2 - Root
3 - Backup apps with Titanium Backup
4 - Install ROM
Is this correct? Am I missing anything? Will the root method or ROM make a difference in terms of the process?
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Nov 16, 2009
I have a bluetooth adapter attached to my car's iPod dock. It acts like a bluetooth headset so I can play music wirelessly from my Droid. My problem is that I have to go through a few menus to connect the paired devises every time I get in the car. Is there a way to have the Droid automatically connect to this device, or is there a widget that can help make this process easier?
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Oct 2, 2010
For those who haven't seen this yet...really surprised Astrid is in the list of possible offenders:
Study: select Android apps sharing data without user notification -- Engadget
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Oct 7, 2010
Hello, I would like to create a zip file from files located on the sd card, I have managed to do that using java but I think that the result is too slow, so I thought of going native using the android NDK.
My questions are:
Does anyone know any C/C++ library to zip unzip files that will work on android?
How to know if the library will work on android?
will this make any difference on performance?
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Nov 12, 2010
I Just installed a new theme (Live Wire) for my Lithium Mod Rom. Don't know if there is a connection, but when I need to update an app, I get the message something like "process android media process stopped unexpectedly" and it will not allow the update. Everything else works well. I have turned it off for awhile, and have done a battery pull.
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May 11, 2010
Every 5 minutes this error pops up "Sorry! the process android.process.acore has stopped unexpectdly. please try again." It doesnt actually close anything. It pops up even when im not in an app. So it's more annoying than anything.
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Apr 29, 2009
I have a background process that save data in my sdcard how can i be alert ?!! it is an application run in background.
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Jul 28, 2009
I'm try to make a dial in native code, could i make a dial with RIL through socket or IPC communication?or push AT command directly to GSM Modem.
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Mar 3, 2010
When I connet device to DDMS sdk tool, I can see the running process.But I don't think that those process are tatal processes.For example, I have 10 android applications, A, B, C, D, E, F, G, H, I and J.If I want to run only A, B, C application on the power-on, how can I do that.?Where can I make a list for processes running in the poweron time.?
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Apr 6, 2009
I need to create a daemon to monitor traffic, and I am using similar method as uuidd.rc to create a daemon. However, I can't the way(code) that the Uuidd.rc can be started? neithor from init.rc or system ("Uuidd.rc").
can someone let me know how the daemon or (.rc) can be executed? code....
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Nov 9, 2009
Is it possible to have adb client connect to an adb daemon on another machine? My dev environment is on a remote server, but the G1 is connected via USB to my local machine.
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Nov 24, 2009
Is it possible for an Android app to install a native Linux daemon with root privilege that runs when the system starts up? The purpose of this daemon would be to support and communicate with our Android front-end app.
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Nov 3, 2009
Now i want to write an application to make a certain text to run slowly from right side screen to left side screen and rotate to repeat. How can i do that?
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Aug 22, 2010
Is there any way to make the "end" button on the Samsung Moment not lock the screen and instead end whatever process that is currently being run/used/viewed, and possible have an assignable soft-touch or side key to lock the phone, or even a menu option or application.
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Sep 18, 2009
I have an app with multiple activities and a local service.
if I finish() all the activities and stop the service, the process still exists (if I go into adb shell and type ps, I still see it).
is there a way to make sure the process is killed when I "quit"?
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May 21, 2010
Sometimes the DDMS in the Eclipse not listing the process.
To do the debug in this condition,
1) Is their any way force the DDMS to list the process?
2) Any command to attach the process from the command line?
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Feb 21, 2009
At a certain point in my program, when I'm completely done with my service, my activity executes unbindService() and stopService() -- yet the process persists. I can tell that it persists because I run "ps" in "adb -e shell":
CODE:.............
"adb logcat", I can show you the sequence of events:
ACTIVITY: context.unbindService(serviceConnection);
SERVICE: onUnbind();
ACTIVITY: stopService(serviceIntent); & returns true!
SERVICE: onDestroy();
First, my activity calls unbindService(serviceConnection). According to the documentation, unbindService() will "Disconnect from an application service. You will no longer receive calls as the service is restarted, and the service is now allowed to stop at any time." So that is fine, and it is happening.
Appropriately, we see the onUnbind() call happen on the service side. According to the documentation, onUnbind() is called when "all clients have disconnected from a particular interface published by the service." So this confirms the correct service connection is being passed, and that the service is responding accordingly.
Next, my activity calls stopService(serviceIntent), and returns true. According to the documentation, stopService() does the following: "If there is a service matching the given Intent that is already running, then it is stopped and true is returned; else false is returned." Again, this is happening and returning true.
In response, the service's onDestroy() method is called. According to the documentation, onDestroy() is "Called by the system to notify a Service that it is no longer used and is being removed. The service should clean up any resources it holds (threads, registered receivers, etc) at this point. Upon return, there will be no more calls in to this Service object and it is effectively dead."
At this point I expect the process to disappear from the process table. Yet it remains indefinitely. But why?
Also, the process is so persistent that I can bind to it again, and I see that it is the same exact process responding because the PID (process ID) is the same!
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Nov 24, 2010
So, I decided to give Tridents ROM a try about 10-minutes ago.
I used ROM Manager, backed-up my old ROM, then downloaded Velocity 0.2.
Now, my phone will do nothing, it turns on and shows the red Droid eye, then when it's time to go to the home screen I get pop-up after pop-up saying that "The process com.android.phone has stopped unexpectedly. Please try again."
I have no way of getting on my phone at all, what can I do?
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Mar 29, 2009
I am porting android to my own device now. I checkout the latest source code from android.git.kernel.org. I have successfully compilated filesystem images and burn those images to my devices. But i couldn't automatically mount my sdcard when android startup. The / sdcard directory is empty when i used 'ls /sdcard' command. I have copied the vold.conf file from development/data/etc direcotry to my device(/system/etc), but it's invalidated. When i read the source code(vold), i found the vold daemon relate to switch driver, device mapper driver and android gadget driver. Are there some document or information about how to configurate android kernel to support vold new volume management and wirte right vold.conf configuration file?
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Jul 30, 2010
I'm using Xperia x10 mini. Whenever I try to add a contact to my phonebook, before clicking save this message appears: "The process android.process.acore has stopped unepectedly. Please try again." And I have no other choice but to click "force close"... Another thing is, even though my contacts' names appears in the messages in my inbox, when I click on the phonebook icon, the phonebook is empty...
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Feb 1, 2010
Are the processes in android asynchronous? If they are asynchronous then how can we conclude when the activity or process is finished or completed its execution.
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Apr 23, 2012
I have captivate. I just up rom to CM9 "update-cm-9-20120417-NIGHTLY-captivatemtd-signed" and "gapps-ics-20120317-signed". However i connect to 91 PC suite, it show messenger error follow:
" Sorry, phone daemon install fails!; there is not enough memory to install the daemon, check your phone's memory space and then connect your phone".
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Sep 11, 2010
So since I got the phone on Thursday, at random, I'll get these popup crash messages, that say "The process com.google.process.gapps has stopped unexpectedly" it has a "Force Close" button, which doesn't seem to change anything other than to acknowlege the message.It will happen at random, sometimes while I'm on the home screen, or sending a text message, but more recently, as I was trying to manage & link contacts. When I searched for this message it seemed to be related to people using Gmail, but I always get this message when I'm doing other things and not even touching my Gmail account.
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