Hello, As per the documentation, standard and singletop differ in just one way, standard activity instance is created every time but singletop instance may or may not be created. I verified this, if in the above code, reverse launchmode of activity A & B i.e. Now A has STANDARD and B as SINGLEINSTANCE.
Repeat same steps again: 1. Click button in Activity A starts B. (oncreate of B is called) 2. Click button in Activity B creates a new instance A. (oncreate of A is called, because A now has STANDARD launchmode) 3. Click button in Activity A re-starts B. (oncreate of B is NOT CALLED, because B now has SINGLEINSTANCE launchmode) This is exactly as per the documentation. Kindly help in understanding why in original source code, multiple instances of B is not created, though B is having STANDARD launch mode? Thanks, Vibhor On Mon, Jun 21, 2010 at 8:15 PM, MobDev <developm...@mobilaria.com> wrote: > Btw, got this from documentation, concentrate on the last sentence : > "Every time there's new intent for a "standard" activity, a new > instance of the class is created to respond to that intent. Each > instance handles a single intent. Similarly, a new instance of a > "singleTop" activity may also be created to handle a new intent. > However, if the target task already has an existing instance of the > activity at the top of its stack, that instance will receive the new > intent (in an onNewIntent() call); a new instance is not created." > found here : > > http://developer.android.com/guide/topics/manifest/activity-element.html#lmode > > On 21 jun, 13:30, Vibhor Mahajan <mahajan.vib...@gmail.com> wrote: > > Hello, > > > > What is launch mode of an activity, which is launched from an activity > > with launch mode as "singleinstance". I tried the following code. > > > > My application has two activities i.e. A & B. Activity A has > > "singleinstance" launchmode set and activity B has "standard" launch > > mode set. Android manifest file is as follows: > > > > <application android:icon="@drawable/icon" android:label="@string/ > > app_name" > > > <activity android:name=".activity_lifecycle" > > android:label="@string/app_name" > > android:launchMode="singleInstance"> > > <intent-filter> <action > > android:name="android.intent.action.MAIN" /> > > <category > > android:name="android.intent.category.LAUNCHER" /> > > </intent-filter> > > </activity> > > <activity android:name=".another" > > android:launchMode="standard" ></activity> > > </application> > > > > Activity A has a button, clicking button starts Activity B using below > > code: > > public void onClick(View v) { > > // TODO Auto-generated method stub > > Intent intent = new > > Intent(activity_lifecycle.this,another.class); > > startActivityForResult(intent, 0); > > > > } > > > > Activity B has a button, clicking button starts Activity A using below > > code: > > public void onClick(View v) { > > // TODO Auto-generated method stub > > Intent intent = new > > Intent(another.this,activity_lifecycle.class); > > startActivityForResult(intent, 0); > > > > } > > > > Click button in Activity A starts B. (oncreate of B is called) > > Click button in Activity B re-starts A. (because A has SINGLEINSTANCE > > launchmode) > > Click button in Activity A re-starts B. (oncreate of B is NOT CALLED) > > > > After 3rd step, since activity B is standard, a new instance should be > > created and not previous instance to be used. > > > > Kindly suggest why when second time activity B is started, a new > > instance of activity B is not created, when it is declared with > > launchmode "standard". > > > > Regards, > > Vibhor > > -- > You received this message because you are subscribed to the Google > Groups "Android Developers" group. > To post to this group, send email to android-developers@googlegroups.com > To unsubscribe from this group, send email to > android-developers+unsubscr...@googlegroups.com<android-developers%2bunsubscr...@googlegroups.com> > For more options, visit this group at > http://groups.google.com/group/android-developers?hl=en > -- You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
