how to force close the currently running application in android - android

i am trying to find out the list of processes which is running in the device.
after that i want to force close all the process except my current application.
I tried using this below code . Its listing out the processed but its not killing the processes .
ActivityManager manager = (ActivityManager) context.getSystemService(ACTIVITY_SERVICE);
List<RunningAppProcessInfo> process = manager.getRunningAppProcesses();
for (int i = 1 ;i< process.size();i++)
{
int pid = process.get(i).pid;
System.out.println("Task " + process.get(i).processName);
android.os.Process.killProcess(pid);is
}
This above code only i tried to kill the processes. once after the killprocess called i again called the getRunningAppProcess() to check the process are killed or not. still its showing all the processes.

Its listing out the processed but its not killing the processes .
Of course. You do not have rights to kill other processes using killProcess(). I have no idea why you think you would have such a right.
We want to kill all foreground as well as background application also.
This will crash the operating system.
If you only want your application running, build your own devices with your own firmware and your own OS and your own GUI framework, put your application on those devices, and distribute those devices.

You can try killBackgroundProcesses() (it needs package names), you need the KILL_BACKGROUND_PROCESSES permission for it. And you can kill your own process without a special permission (be sure to do it last).
If it still doesn't work, you need to root the phone, and do it as root.

Related

How to kill another Application or Activity programmatically without being root [duplicate]

This question already has answers here:
Kill another application on Android?
(2 answers)
Closed 3 years ago.
I want to kill another app from my Application once the other app comes into foreground.
I am already capturing if my app is in foreground or background. When my app gets to background, I want to filter for the right process by it's name and use its pid to kill it. I'm using ActivityManager.getRunningAppProcesses() and filtering the processes for the wanted name, but only processes related to my app are shown. That's the first problem, because I cannot access the pid of the other apps processes.
The next problem is that, even by using the current pid (from adb) of the other apps process, my code which should kill it does not work (the other app keeps running).
I am using
<uses-permission android:name="android.permission.KILL_BACKGROUND_PROCESSES" /> and <uses-permission android:name="android.permission.GET_TASKS" />.
I assume that I would need be root to kill other apps, so also something like Runtime.getRuntime().exec(arrayOf<String>("su", "-c", "kill 24043")) does not work.
val amg = getSystemService(ACTIVITY_SERVICE) as ActivityManager
var processes = amg.getRunningAppProcesses();
for (info in processes) {
if (info.processName.equals(otherAppName)) {
val process = Runtime.getRuntime().exec(arrayOf<String>("su", "-c", "kill $pid"))
android.os.Process.killProcess(info.pid)
android.os.Process.sendSignal(info.pid, android.os.Process.SIGNAL_KILL)
amg.killBackgroundProcesses(info.processName)
}
}
The last three lines result in the signal being send, but nothing happening and the one before obviously leads to java.io.IOException: Cannot run program "su": error=13, Permission denied.
Is there another way to kill another app, that doesn't require to be root?
You can't kill another app for security reasons. As a user, i don't want to install an app that close my apps without a good reason and without I even know about it, it would be pretty weird. That being said, it's possible to close background process from another app's, I didn't test it by myself but here is:
ActivityManager manager = (ActivityManager)getSystemService(Activity.ACTIVITY_SERVICE);
manager.killBackgroundProcesses(packageName);
You'll need to put this on your Manifest as well:
<uses-permission android:name="android.permission.KILL_BACKGROUND_PROCESSES" />

How to kill all installed apps

I want to implement a button that kills all running apps and associated processes myself, but I cannot make it to work with some installed apps.
I tried
activityManager.restartPackage( packageName );
activityManager.killBackgroundProcesses( packageName ); (Which is the new version of restartPackage)
android.os.Process.killProcess( pid );
My issue is that some apps don't get killed and when a refresh the list of running apps, they still there.
I've read:
ActivityManager
Android: Killing (all) Foreground running App

How to exit selected running applications using process id

I am using this code to stop the selected running applications in android phone:
Button view = (Button)findViewById(R.id.button1);
view.setOnClickListener(new View.OnClickListener(){
public void onClick(View view){
String appname = getIntent().getExtras().getString("appname");
String pname=appname.split("\n")[3];
int id=Integer.parseInt(pname);
finish();
android.os.Process.killProcess(id);
The Id is correct but this code is not working... any help??
Is there any other code to kill processes by using their id??
if you check the Android API for Kill Process it says the following:
Kill the process with the given PID. Note that, though this API allows us to request to kill any process based on its PID, the kernel will still impose standard restrictions on which PIDs you are actually able to kill. Typically this means only the process running the caller's packages/application and any additional processes created by that app; packages sharing a common UID will also be able to kill each other's processes.
This means you're not able to kill other apps except the ones your app package is in.
This answer explains why it is so and how it works: https://stackoverflow.com/a/7560009/1306012
You need the package name of the app you want to kill (for example com.facebook.katana) and then call
ActivityManager.killBackgroundProcesses(packageName);
//for example: kill the facebook app
//ActivityManager.killBackgroundProcesses("com.facebook.katana);
However, you need the permission KILL_BACKGROUND_PROCESSES defined in your manifest.
you can use
ActivityManager manager = (ActivityManager)getSystemService(Context.ACTIVITY_SERVICE);
List<RunningAppProcessInfo> services = manager.getRunningAppProcesses();
String service1name = service[1].processName;
you can get all running process's package names, check which one you want to kill, choose that
process get process id by service.pid.
and call
android.os.Process.killProcess(service.pid);

Android app that kills background processes to save power

I am writing an Andoid app so that when battery life gets below a certain level, a dialog with options of how to save the battery appears. One of those options is to close all background apps/services (processes) using ActivityManager.killBackgroundProcesses(). The code is shown here:
public void TaskKiller( View view){
List<ApplicationInfo> packages;
PackageManager pm;
pm = getPackageManager();
packages = pm.getInstalledApplications(0);
ActivityManager mActivityManager = (ActivityManager)this.getSystemService(Context.ACTIVITY_SERVICE);
for (ApplicationInfo packageInfo : packages) {
mActivityManager.killBackgroundProcesses(packageInfo.packageName);
}
}
However, when I click the button that calls TaskKiller() and closes the background processes, some of the apps (Email, Google Maps) instantly begin he process of restarting. How can I alter my code so these apps stay closed until they are reopened? Also, is this approach sensible in regard to saving power or am I attacking this the wrong way?
I don't think that's the right way of handeling the problem.
These apps have broadcast receivers, which mean they'll restart the service whenever something happens (i.e. AC plugged in/WiFi turned on), and I don't think there's a way to stop that without root, and actually disabling the broadcast receiver.
You could make something that kills it every 5 minutes, but that wouldn't be very battery-friendly.
I don't think it's a good idea to force close the Maps app everytime, it's a bug in Android i think..
One of the answers is as following:
"
Actually, Maps always runs when you have "Backround Data" checkmarked in your General Sync Settings under Account Settings in your phone's Gmail app. Syncing backround data is necessary, unfortunately, in order for your phone service provider to provide calling and texting (although internet access will still work without this item checkmarked). Unchecking this box will remove Maps from Running applications (& any other app that needs it), improving battery time and speeding up your phone. But, if you want to make calls, text or use apps that require Backround sync, you have to have this ckeckmarked. If all you want to do is browse the net...uncheckmark it. There are currently no other legitimate solutions to the issue. Hope this is helpful...
"
See this issue (https://code.google.com/p/android/issues/detail?id=10251)

Android: Killing (all) Foreground running App

I am looking for a way to kill the foreground Dalvik App(actively running) from the linux kernel(using it's process ID)?
How can I achieve this? any ideas? Does the kernel see the pid of a running App?
How does for eg. process Manager/Task manager in Android achieve this?
Any leads?
Edited:
The problem I'm looking at is a way to kill an App that "behaves differently than intended".
This "different behaviour" is always fixed. Think of it like sending a message to a particular port.
How can I kill an App by staying outside of it and still having permissions to kill it? That is why I was wondering if I have to make this module sit on the framework if not right in the kernel.
This will get all running processes and kill those with the specified pid:
ArrayList<Integer> pids = new ArrayList<Integer>();
ActivityManager manager = (ActivityManager)this.getSystemService(Context.ACTIVITY_SERVICE);
List<ActivityManager.RunningAppProcessInfo> listOfProcesses = manager.getRunningAppProcesses();
for (ActivityManager.RunningAppProcessInfo process : listOfProcesses)
{
if (pids.contains(process.pid))
{
// Ends the app
manager.restartPackage(process.processName);
}
}
You will need these permissions to do this:
<uses-permission android:name="android.permission.GET_TASKS" />
<uses-permission android:name="android.permission.RESTART_PACKAGES"/>

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