showInputMethodPicker from notification not working in Android 9 - android

My app sometimes shows a notification to simplify switching to the app's internal input method. Therefore, I am executing
((InputMethodManager) getSystemService(INPUT_METHOD_SERVICE)).showInputMethodPicker();
when the user clicks the notification.
This has worked so far, but does not always work on Android 9: When my app is in foreground, it works. When it is not, nothing happens. On logcat, I see a warning
"Warning 889 InputMethodManagerService Ignoring
showInputMethodPickerFromClient of uid 10210:
com.android.internal.view.IInputMethodClient$Stub$Proxy#edf46f0".
Is there any way to make this work again?
Update: I have tried to create an activity, calling showInputMethodPicker(); in onResume(). This works (if I use postDelayed() with a relatively long delay which is unfortunate), but I cannot get the activity to close itself automatically. So this doesn't seem to be a good way.

The problem can be solved by setting the WRITE_SECURE_SETTINGS permission for your App.
Unfortunately, this requires issuing one adb command:
adb shell pm grant com.name.app android.permission.WRITE_SECURE_SETTINGS
where com.name.app is the package name of your app.

Related

Which process in android asks ActivityManager to broadcast BOOT_COMPLETED

I have searched this over the web, without an answer. Basically while testing a device, I observe that the display screen fires ON much earlier, while in the logcat the print
Consoleui:bootComplete follows after ~ 8 sec.
Now Device screen is displayed as part of starting Launcher application, so in the natural sequence of events, the system server will ask activitymanager to start launcher in a seperate thread and go on doing more work.
Thus it is only natural that display will come up, but still there might remain some services to be started by activitymanager/systemserver before a BOOT_COMPLETED broadcast can be made.
I have to prove this. In order to do so, I need to know which process tells the activitymanager that now it can broadcast the boot_complete message, if its the system server, please tell me the part of code where it does so. Thanks.
The activity manager service sends the boot complete intent on line 6320 of ActivityManagerService.java.
The activity manager service also starts the launcher using an intent with CATEGORY_HOME on line 3305 of ActivityManagerService.java.
It appears that your original question contains 2 sub-questions:
Q1. Where exactly in the AOSP code is system broadcast Intent BOOT_COMPLETED fired?
Q2. What are all the necessary conditions to trigger the firing of BOOT_COMPLETED?
For Q1, a broad location is in the Activity Manager. In this sense, #Alex Lockwood’s answer is correct. However, I have noticed that the exact location and the way this Intent is fired may change between Android versions. A source code search should be able to lead to the answer. Take AOSP branch “android-8.1.0_r32” as an example. First, find out where file “ActivityManagerService.java” is located using the following shell commands:
$ cd [your AOSP branch’s root directory]
$ find . -name ActivityManagerService.java
Once the file is found, go to its parent directory. For example, in our current case:
$ cd frameworks/base/services/core/java/com/android/server/am
Now perform the following search:
$ grep -rIn ACTION_BOOT_COMPLETED .
The output reveals that the exact location is not in file “ActivityManagerService.java”, but in file “UserController.java”. More exactly, it is in method “UserController.finishUserUnlockedCompleted()”.
For Q2, we can search backwards from the above method. Eventually we may reach method “ActivityManagerService.finishBooting()” where we can see that Boolean “mBootAnimationComplete” must be true. This implies that the boot animation process must be completed in order for BOOT_COMPLETED to be fired, and further implies that while the boot animation process is going on, a lot of system services are being started. For further details, you may refer to some dedicated books that explain which system services must be ready in order for the boot animation process to end.

Android : can native code get broadcast intent from android system? [duplicate]

This question already has answers here:
Listen to own application uninstall event on Android
(3 answers)
Closed 7 years ago.
Recently i've seen a funny app - Photo Wonder.
When this app is uninstalled, it shows a web survey page asking for the reason of app uninstall. Now, here is the problem.
As far as I know, after an app has been removed, the system broadcasts ACTION_PAKAGE_REMOVED intent.
But this funny app was able to show my the web page although the official doc says
"The package that is being installed does not receive this Intent."
Anyhow, I could find a process checking some kind of status of the app.
Now here is the question. Can the native app catch the broadcasted intent from android system?
If it is possible, please let me know how! :-(
I believe I've got the main idea of how they did it. Here is the pieces of the puzzle.
Any Android application can start a process by calling Runtime.exec() function.
Runtime.getRuntime().exec("chmod 755 '/data/data/my.app/files'/native_code");
After this line of code gets executed there is another process spawned. This process runs under the same linux user as the application itself.
When a user opens Settings -> Apps -> My App and presses "Force stop" button, main application process gets killed, but the process hosting native program (see above) still runs. I personally believe this is a security issue and I am going to report it back to AOSP.
Such native program can run infinitely and do nothing - just sleeping. But before going to sleep, it registers a termination signal handler which will be called when process is about to be terminated by the system.
int main(void) {
signal(SIGTERM, termination_handler);
while(1) {
sleep(10);
}
}
void termination_handler(int sig) {
// handle termination signal here
}
Now you should already know what the last piece is, right? My native termination_handler should be able to launch a browser. I didn't try this in code, but I assume this is possible, because I can do it using adb shell as following
adb shell am start -a android.intent.action.VIEW -d http://www.google.com
Now back to the question about how Dolphin Browser does it. Install the app and launch it at least once. Once started, it registers a native uninstall watcher using the principles described above. To see it, connect to the device and open adb shell. Then call ps to see list of processes. You will see two processes similar to following
u0_a109 315 ... mobi.mgeek.TunnyBrowser
u0_a109 371 ... /data/data/mobi.mgeek.TunnyBrowser/files/watch_server
As you can see it starts a watch_server native program, which is a part of its apk-file. Now open App info page of Dolphin Browser and press "Force Stop". Switch back to terminal and call ps again. You will see there is no mobi.mgeek.TunnyBrowser process anymore, but watch_server still runs.
By the way this approach will only work, if watcher server runs all the time. To
make sure it is always up, both apps require "run at startup"
permission, where they start their watchers.
Now, when you uninstall the app, Android stops all processes belonging to this application. Watcher receives termination signal and opens browser with predefined URL and then shuts down.
I might look a bit different in some details, but the main concept behind this hack must be as described.
There could be a tricky thing like that application is also having watcher service.
You can check the permission used by that app may contain INSTALL and UNINSTALL permissions.
HOW IT WORKS:
instead of single app that may have 2 app bundle.
as and when you install it, this app is also installing some service that is watching your app status
When you try to uninstall that app the system broadcast is called which is handled by that service and will check that if your package is exist in installed application or not.
as soon as this service finds that your package is not in the list it calls an intent with action view with the web url to open the brawser.

monkeyrunner script - starting an activity that requires a permission

in a monkeyrunner script while launching an activity, is there a way to mimic yourself having a certain permission that the starting activity requires?
I am using "device.startActivity(component='com.package/.MyActivity)" but the activity MyActivity requires a permission, and hence device.startActivity fails. Is there a way to give this permission to the script?
When I had this problem, I solved it by creating a very small application(with the correct permissions in the manifest) that I pushed to the phone. All the application did was re-send intents sent to it, but to a different destination. My application also had a gui for triggering events manually, but that's optional.
You can add permissions in AndroidManifest.xml file.
I don't know what monkeyRunner script is, and do we talk about the same permissions here, but in Android, all permissions you want to give to the app, you go to Manifest file.
Running an activity through monkeyrunner is not exactly different than running it manually. So, when it asks for permission, you can verify it right after installation by sending an extra command like:
device.press('KEYCODE_ENTER', MonkeyDevice.DOWN_AND_UP)
or
device.press('KEYCODE_BUTTON_SELECT', MonkeyDevice.DOWN_AND_UP)
You can also get your application have system privilages by pushing it into a special folder with these commands:
>adb remount
>adb push your\local\apk\path.apk system/priv-app
>adb shell stop
>adb shell start
Hope it works for you...

How can I dismiss the android keyguard using adb intent

I am looking for a way to use ADB to dismiss the keyguard in order to automate some tasks.
I would like to start an ACTIVITY (perhaps to call the public method disableKeyguard in android.app.KeyguardManager.KeyguardLock), because I assume that it will work on all (or most) Android devices, but I am unsure of the syntax.
I do not wish to use MonkeyRunner, because it is not present (or perhaps, callable) on all devices. I also cannot send a MENU keycode (adb shell input keycode 82), because this does not dismiss the keyguard on all devices.
Currently I am sending events (low-level touch events), but this needs to be customized for each device, so it is a time consuming task.
Does anyone have a suggestion?
The "Activity Testing" article has a section called Unlocking the emulator or device that addresses this situation.
In short, there isn't a way to do it directly with adb but using disableKeyguard() isn't complicated (see the three lines of example code in the article linked to above). You could easily put together a little app that does nothing but disable the keyguard. It would then just be a matter of
adb install <apk>
adb shell am start <package>/.<activity>
# Whatever you need to automate
adb uninstall <package>
(Where <apk>, <package>, and <activity> all refer to the tiny app that just disables the keyguard.)

Stop running application with ADB

is there a simple way to stop a running application using ADB.
Szenario:
Working on App
Have a script which uploads, installs and starts App on change
Problem:
Currently running version gets killed (not shutdown), which make testing cleanup very hard. Option would be to "do cleanup in between", like after a certain time, but I would prefer to do it in the correct location (so like with the OS, as long as the App is still running, so need to save value, as soon as the OS tells me e.g. memory low or calls onDestroy, I want to save stuff)
Chris
I'm not aware of a way to do this. I was hoping there might be a way to send an intent to tell the app to exit using adb shell e.g.
adb shell am start -a [intent] -n [class]
However, I found that somebody asked this question on a Google forum but they haven't got an answer:
http://groups.google.com/group/android-platform/browse_thread/thread/3fd02d01c6c3b41a/56814e518503efd6

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