Is there a way of removing all activities belonging to the app in foreground (my app)?
The activities might be present in different tasks. Also after removing all activities my app should return to home screen which is launcher activity of my app.
Any kind of help would be greatly appreciated.
You need to call your activity like this.
Intent login=new Intent(MainActivity.this,HomeActivity.class);
login.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TASK | Intent.FLAG_ACTIVITY_NEW_TASK);
login.putExtra("flag",false);
startActivity(login);
finish();
You may need
Intent intent = new Intent(getApplicationContext(), MainActivity.class);
intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TASK|Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(intent);
FLAG_ACTIVITY_CLEAR_TASK
Any existing task that would be associated with the current activity to be cleared before the desired activity is started. Simply old activities are finished.
FLAG_ACTIVITY_NEW_TASK
If set, this activity will become the start of a new task on this history stack.
for more details, Intent Flags
Intent i = new Intent(OldActivity.this, NewActivity.class);
// set the new task and clear flags
i.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TASK);
startActivity(i);
finish();
Android finishAndRemoveTask dosenot start second activity
this is the first activity
Intent i = new Intent(currentAct.this, secondAct.class);
i.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
i.putExtra("abcd", j);
startActivity(i);
finishAndRemoveTask();
If I dont add finishAndRemoveTask(); it works fine the secondAct starts
this is the manifest
<activity
android:name="currentAct"
android:noHistory="true"
android:theme="#style/Theme.AppCompat.Translucent"
android:taskAffinity=".ShortCutActivity">
</activity>
<activity
android:name="secondAct"
android:noHistory="true"
android:theme="#style/Theme.AppCompat.Light.NoActionBar.FullScreen"
android:taskAffinity=".ShortCutActivity">
ShortCutActivity is just a mainactivity
how can we start second activity and remove the first activity from stack also
use this before calling startActivity(intent)
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TOP);
You should add flag FLAG_ACTIVITY_CLEAR_TASK for launching intent.
Intent intent = new Intent(this, Activity.class);
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK |
Intent.FLAG_ACTIVITY_CLEAR_TASK);
startActivity(intent);
Referring to docs:
If set in an Intent passed to Context.startActivity(), this flag will cause any existing task that would be associated with the activity to be cleared before the activity is started. That is, the activity becomes the new root of an otherwise empty task, and any old activities are finished. This can only be used in conjunction with FLAG_ACTIVITY_NEW_TASK.
In my Android app, I am launching my app from notification using below activity flags:
IntentCompat.FLAG_ACTIVITY_CLEAR_TASK
Intent.FLAG_ACTIVITY_NEW_TASK
Intent.FLAG_ACTIVITY_CLEAR_TOP
Still some activities of old task are getting visible on new launch.
Am I missing any flag?
Try this,
Intent intent = new Intent(MainActivity.this, Second.class).setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TASK);
startActivity(intent);
finish();
Intent loginscreen = new Intent(this, HomeActivity.class);
loginscreen.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_SINGLE_TOP);
startActivity(loginscreen);
this.finish();
I agree with #fab It is as good as logout functionality where in you want t clear all the flags values set by the user .
To Achieve the target android has provided Activity launch modes to launch activity
For detailed description go through Link
You can add this line before you create the PendingIntent, but after that it depends of what you want to do exactly:
targetIntent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_SINGLE_TOP);
I am developing small android application in which I have 3 activities say A1, A2, A3. I can come back from A2 to A1 but when I start A3 and then if user clicks back button then I want to close all previous windows. I tried this in following ways:
Intent intent = new Intent(LoginActivity.this, DashboardActivity.class);
intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP |Intent.FLAG_ACTIVITY_NEW_TASK);
intent.addFlags(Intent.FLAG_ACTIVITY_NO_HISTORY);
startActivity(intent);
but this is not working for me. I am using action-bar activity.I tried to clear task :
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | IntentCompat.FLAG_ACTIVITY_CLEAR_TASK);
Above clearing task working for me but it start my A3 with some blank white screen.
Use this
Intent intent = new Intent(LoginActivity.this, DashboardActivity.class);
intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(intent);
finish(); // call this to finish the current activity
try this
Intent intent = new Intent(LoginActivity.this, DashboardActivity.class);
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TASK);
startActivity(intent);
Have you declared android:launchMode="singleTop" for all activities in the manifest? Also, declare it to MainActivity:
<activity android:name=".MyActivity" android:launchMode="singleTop" ... />
Usually, this behaviour happened when we do not declare a launchMode in the manifest. Although you are using Intent.[MODE], then you will need this attribute. See this documentation for more information about launchMode.
In Android I have some activities, let's say A, B, C.
In A, I use this code to open B:
Intent intent = new Intent(this, B.class);
startActivity(intent);
In B, I use this code to open C:
Intent intent = new Intent(this, C.class);
startActivity(intent);
When the user taps a button in C, I want to go back to A and clear the back stack (close both B and C). So when the user use the back button B and C will not show up, I've been trying the following:
Intent intent = new Intent(this, A.class);
intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(intent);
But B and C are still showing up if I use the back button when I'm back in activity A. How can I avoid this?
Try adding FLAG_ACTIVITY_NEW_TASK as described in the docs for FLAG_ACTIVITY_CLEAR_TOP:
This launch mode can also be used to
good effect in conjunction with
FLAG_ACTIVITY_NEW_TASK: if used to
start the root activity of a task, it
will bring any currently running
instance of that task to the
foreground, and then clear it to its
root state. This is especially useful,
for example, when launching an
activity from the notification
manager.
So your code to launch A would be:
Intent intent = new Intent(this, A.class);
intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(intent);
CurrentActivity.this.finish(); // if the activity running has it's own context
// view.getContext().finish() for fragments etc.
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TASK);
startActivity(intent);
What about adding in manifests file for related activity :
android:noHistory="true"
to the activity definition of B and C ? They will not be added to the backstack. Not sure if that is what you want.
This bothers me for a long time .Finally I worked it out by doing this:
In fragment,use:
Intent intent = new Intent(view.getContext(), A.class);
intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(intent);
In Activity,use(add one more intent flag Intent.FLAG_ACTIVITY_CLEAR_TASK compared to fragment):
Intent intent = new Intent(this, MainActivity.class);
intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_CLEAR_TASK | Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(intent);
Starting in API 16 (Jelly Bean), you can just call finishAffinity().
Now you can also call ActivityCompat.finishAffinity(Activity activity) with the compatibility library.
Be sure to set taskAffinity in the manifest to a package name unique to that group of activities.
See for more info:
http://developer.android.com/reference/android/support/v4/app/ActivityCompat.html#finishAffinity%28android.app.Activity%29
Add android:launchMode="singleTop" to the activity element in your manifest for Activity A
Then use intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP) and
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK) when starting Activity A
This means that when Activity A is launched, all tasks on top of it are cleared so that A is top. A new back stack is created with A at the root, and using singleTop ensures you only ever launch A once (since A is now on top due to ..._CLEAR_TOP).
Try using
intent.addFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP);
and not
intent.setFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP);
If your application has minimum sdk version 16 then you can use
finishAffinity()
Finish this activity as well as all activities immediately below it in the current task that have the same affinity.
This is work for me
In Top Payment screen remove all back-stack activits,
#Override
public void onBackPressed() {
finishAffinity();
startActivity(new Intent(PaymentDoneActivity.this,Home.class));
}
http://developer.android.com/reference/android/app/Activity.html#finishAffinity%28%29
As per Wakka in Removing an activity from the history stack...
Add android:noHistory="true" attribute to your <activity> in the AndroidManifest.xml like this:
<activity android:name=".MyActivity"
android:noHistory="true">
</activity>
For future research, try this code.
Intent intent = new Intent(context, LoginActivity.class);
intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_CLEAR_TASK | Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(intent);
finish();
Use finishAffinity(); in task C when starting task A to clear backstack activities.
Use finishAffinity() to clear all backstack with existing one.
Suppose, Activities A, B and C are in stack, and finishAffinity(); is called in Activity C,
- Activity B will be finished / removing from stack.
- Activity A will be finished / removing from stack.
- Activity C will finished / removing from stack.
Use this code for starting a new Activity and close or destroy all other activity stack or back stack.
Intent intent = new Intent(this, MainActivity.class);
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TASK);
startActivity(intent);
I found an interesting solution which might help. I did this in my onBackPressed() method.
finishAffinity();
finish();
FinishAffinity removes the connection of the existing activity to its stack. And then finish helps you exit that activity. Which will eventually exit the application.
In kotlin it is almost same like java. Only | symbol is replaced by or text.
So, it is written like-
intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TASK or Intent.FLAG_ACTIVITY_NEW_TASK)
I found the answers here a little misleading because the code in the original question seems to work fine for me?
With A being the root activity, starting it from B or C only with FLAG_ACTIVITY_CLEAR_TOP does remove B and C from the back stack.
It sounds to me like you need to start Activity C from Activity B by using startActivityForResult(). When you click a button in Activity C, call setResult(RESULT_OK) and finish() so Activity C is ended. In Activity B, you could have the onActivityResult() respond by also calling finish() on itself, and you'd then be taken back to Activity A.
Advanced, Reuseable Kotlin:
You can set the flag directly using setter method. In Kotlin or is the replacement for the Java bitwise or |.
intent.flags = FLAG_ACTIVITY_NEW_TASK or FLAG_ACTIVITY_CLEAR_TASK
If use this more than once, create an Intent extension function
fun Intent.clearStack() {
flags = Intent.FLAG_ACTIVITY_NEW_TASK or Intent.FLAG_ACTIVITY_CLEAR_TASK
}
You can then directly call this function before starting the intent
intent.clearStack()
If you need the option to add additional flags in other situations, add an optional param to the extension function.
fun Intent.clearStack(additionalFlags: Int = 0) {
flags = additionalFlags or Intent.FLAG_ACTIVITY_NEW_TASK or Intent.FLAG_ACTIVITY_CLEAR_TASK
}
I tried all solutions and none worked individually for me.
My Solution is :
Declare Activity A as SingleTop by using [android:launchMode="singleTop"] in Android manifest.
Now add the following flags while launching A from anywhere. It will clear the stack.
Intent in = new Intent(mContext, A.class);
in.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TASK );
startActivity(in);
finish();
Intent.FLAG_ACTIVITY_CLEAR_TOP will not work in this case. Please use (Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TASK)
For more detail please check out this documentation.
Kotlin example:
val intent = Intent(this#LoginActivity, MainActivity::class.java)
intent.flags = Intent.FLAG_ACTIVITY_CLEAR_TOP or Intent.FLAG_ACTIVITY_NEW_TASK
startActivity(intent)
finish()
logout.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TASK);
logout.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TASK | Intent.FLAG_ACTIVITY_CLEAR_TOP);
for me adding Intent.FLAG_ACTIVITY_CLEAR_TASK solved the problem
Intent i = new Intent(SettingsActivity.this, StartPage.class);
i.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_CLEAR_TASK | Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(i);
finish();
You can use this example to call your Activity A from Activity C
Intent loout = new Intent(context, LoginActivity.class);
loout.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TASK);
context.startActivity(loout);
you wont get any activity pressing back button after that :
intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_CLEAR_TASK |
Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(intent);
finishAffinity();
finish();
In addition to FLAG_ACTIVITY_CLEAR_TOP, you may try adding Intent.FLAG_ACTIVITY_SINGLE_TOP as well:
intent.addFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP);
intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
The given code works correctly. I have tried in the Application Life Cycle sample.
I haven't got B and C in the back stack after starting activity A with flag, FLAG_ACTIVITY_CLEAR_TOP
i called activity_name.this.finish() after starting new intent and it worked for me.
I tried "FLAG_ACTIVITY_CLEAR_TOP" and "FLAG_ACTIVITY_NEW_TASK"
But it won't work for me... I am not suggesting this solution for use but if setting flag won't work for you than you can try this..But still i recommend don't use it
Add NO History Flag in the intent.
In activity B, start the activity C as below >>>>>>
Intent intent = new Intent(this, C.class);
intent.setFlags(intent.getFlags() | Intent.FLAG_ACTIVITY_NO_HISTORY);
startActivity(intent);
finish();