How to Detect Android App Uninstall

How can an app detect that it's going to be uninstalled?

Okay. I have been investigating a lot on this problem since 2 days and finally found a "wild way" to solve it without rooting the device :)

First, here are the highlights to achieve the solution:

1. Whenever user goes to Settings -> Manage Apps -> Selects a particular application
we receive a broadcast android.intent.action.QUERY_PACKAGE_RESTART with name of the application's package as extras.

2. After that when we click on the Uninstall button (with package installer), it opens an activity named - com.android.packageinstaller.UninstallerActivity

Control flow will be like:

Under App Settings the User Clicks on Uninstall button ---> We get control to show a dialogue / start another activity / etc ---> We finish our Pre-Uninstallation task ---> User is Returned back to Uninstallation confirmation screen ---> User confirms and uninstalls the app

Used Method:

We will implement a BroadcastReceiver in our application for listening the action "android.intent.action.QUERY_PACKAGE_RESTART" and match our package name inside onReceive() method. If the broadcast was received for selection of our desired application package, then we'll initiate a background thread that will keep monitoring the foreground running activities using the ActivityManager.

Once we find the foreground activity to be "com.android.packageinstaller.UninstallerActivity", it'll be confirm that user wants to uninstall our application. At this point we'll perform the desired tasks (either display a dialogue, or start another activity overlapping the uninstallation window, etc..) that are to be performed before uninstallation. After performing our task, we'll allow the user to continue with confirming the uninstallation process.

Implementation / Source Code:

In manifest.xml

add permission:

<uses-permission android:name="android.permission.GET_TASKS"/>

and broadcast receiver:

<receiver android:name=".UninstallIntentReceiver">
      <intent-filter android:priority="0">
            <action android:name="android.intent.action.QUERY_PACKAGE_RESTART" />
            <data android:scheme="package" />
      </intent-filter>
 </receiver>

UninstallIntentReceiver.java (broadcast receiver class)

public class UninstallIntentReceiver extends BroadcastReceiver{

    @Override
    public void onReceive(Context context, Intent intent) {
        // fetching package names from extras
        String[] packageNames = intent.getStringArrayExtra("android.intent.extra.PACKAGES"); 

        if(packageNames!=null){
            for(String packageName: packageNames){
                if(packageName!=null && packageName.equals("YOUR_APPLICATION_PACKAGE_NAME")){
                    // User has selected our application under the Manage Apps settings
                    // now initiating background thread to watch for activity
                    new ListenActivities(context).start();

                }
            }
        }
    }

}

ListenActivities class - for monitoring the foreground activities

class ListenActivities extends Thread{
    boolean exit = false;
    ActivityManager am = null;
    Context context = null;

    public ListenActivities(Context con){
        context = con;
        am = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);
    }

    public void run(){

        Looper.prepare();

        while(!exit){

             // get the info from the currently running task
             List< ActivityManager.RunningTaskInfo > taskInfo = am.getRunningTasks(MAX_PRIORITY); 

             String activityName = taskInfo.get(0).topActivity.getClassName();


             Log.d("topActivity", "CURRENT Activity ::"
                     + activityName);

             if (activityName.equals("com.android.packageinstaller.UninstallerActivity")) {
                // User has clicked on the Uninstall button under the Manage Apps settings

                 //do whatever pre-uninstallation task you want to perform here
                 // show dialogue or start another activity or database operations etc..etc..

                // context.startActivity(new Intent(context, MyPreUninstallationMsgActivity.class).setFlags(Intent.FLAG_ACTIVITY_NEW_TASK));
                 exit = true;
                 Toast.makeText(context, "Done with preuninstallation tasks... Exiting Now", Toast.LENGTH_SHORT).show();
            } else if(activityName.equals("com.android.settings.ManageApplications")) {
                // back button was pressed and the user has been taken back to Manage Applications window
                          // we should close the activity monitoring now
                exit=true;
            }
        }
        Looper.loop();
    }
}

Known Limitations:

When the user clicks on the Uninstall button under Manage Apps settings, we'll perform our pre-uninstallation tasks and then promt the user to the Confirmation window where user can either confirm to uninstall or can Cancel the operation.

The approach described above is as of now not covering the case if user clicks on Cancel button after we have performed our task. But this could be tackled easily with some ammendments.

E.g.: We can implement a logic to revert the changes we made if the broadcast "android.intent.action.PACKAGE_REMOVED" was not received in the end.

I hope this approach will be helpful to you :) As this is the only way in my opinion we can solve your problem without rooting the device!

[Update 1]:
Suggested Approach to check if the Uninstallation task was Canceled:

Its kind of funny that I had entirely different and much complex idea earlier(involving broadcasts, ActivityManager, etc.. etc..), but while writing it here just another idea struck into my mind which is comparatively very simple :)

When the User clicks on Uninstall button under Manage Apps settings and after you have performed your pre-uninstallation tasks, you just set some SharedPreference in your app that you have performed the pre-uninstall tasks and are ready for uninstallation. After this you need not to care about anything.

If the user continues to uninstall -> its well and good as you have already performed required tasks.

While if user finally clicks on Cancel button and goes away -> don't bother. Until the user goes and run your application again. Now inside "onStart()" / "onResume()" of your application's main activity, you can check the SharedPreference's value and if it was set for uninstallation, that will mean that user didn't finally proceeded with the uninstallation. And now you could revert the changes made earlier(reversing the pre-uninstall tasks performed) to ensure that your application runs perfectly!

Is it possible to detect Android application uninstall?

No dear you cant check that your application is going to uninstall.

When the user uninstalls the app, at first the process is killed, then your apk file and data directory are deleted, along with the records in Package Manager that tell other apps which intent filters you've registered for.

But you can create your folder in your cache dir so that when your application will be deleted all folders and files automatically will be deleted.

Please check it. http://developer.android.com/guide/topics/data/data-storage.html

So there's no way for your application to know that it is being uninstalled (without modifying the kernel). All files created in the data/data/your.app.package is deleted automatically upon uninstall.

Another approach could be to have another application that checks whether this application is installed or not. If not, it can do the clean-up work.

like this

Is it possible to detect Android app uninstall?

Unfortunately the ACTION_PACKAGE_REMOVED intent will be sent out to all receivers except for your own. This is confirmed here.

Some questions for your C2DM plan, since I'm not very familiar with it. If the user just leaves their device off for a long period of time, will that trigger the error condition you use? How does C2DM actually report an "unreachable" device? Is that a condition that only occurs when it attempts to send the push notification and fails or is it when it somehow determines it reaches the device but fails to be handled properly? Obviously in the second scenario your plan would work, but I can see some "false positives" occurring otherwise.

Older SO question for reference: android not receiving Intent ACTION_PACKAGE_REMOVED in the removed package

Android How I can Detect application uninstallation in java

Sorry, It is not possible because android does not give you this facility.

By default then, all the data whether in shared preference and cache are deleted. So if you put the session in the shared preference it will automatically deleted.

But if you save any data outside the app data

(~/android/data/com.something/yourappname)

it will remain in the storage. You can save data in shared preference for your purpose. For further info please visit Action package removed Android Developer

How to know my app is uninstalled from the device...?

My proposal will be the following. You can intercept the intent for your application uninstall. Simply put the following code in your manifest file:

<uses-permission android:name="android.permission.INSTALL_PACKAGES" />
<uses-permission android:name="android.permission.DELETE_PACKAGES" />
<uses-permission android:name="android.permission.CLEAR_APP_CACHE" />
<uses-permission android:name="android.permission.READ_PHONE_STATE" />
<uses-permission android:name="android.permission.CLEAR_APP_USER_DATA" />

<application
    android:icon="@drawable/ic_launcher"
    android:label="@string/app_name" >
    <activity
        android:name=".UninstallIntentActivity"
        android:label="@string/app_name" >
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
        <intent-filter>
            <action android:name="android.intent.action.VIEW" />
            <action android:name="android.intent.action.DELETE" />
            <category android:name="android.intent.category.DEFAULT" />
            <data android:scheme="package" android:pathPattern="com.testpack.yourapp" />
        </intent-filter>



    </activity>

</application>

After this you can somehow process that your application is going to be deleted (for instance, send you a email), and call the package manager uninstaller.